./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.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/mix038.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:26:55,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:26:56,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:26:56,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:26:56,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:26:56,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:26:56,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:26:56,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:26:56,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:26:56,054 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:26:56,055 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:26:56,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:26:56,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:26:56,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:26:56,058 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:26:56,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:26:56,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:26:56,059 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:26:56,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:26:56,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:26:56,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:26:56,060 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:26:56,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:26:56,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:26:56,061 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:26:56,061 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:26:56,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:26:56,062 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:26:56,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:26:56,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:26:56,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:26:56,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:26:56,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:26:56,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:26:56,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:26:56,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:26:56,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:26:56,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:26:56,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:26:56,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:26:56,067 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:26:56,067 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:26:56,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:26:56,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:26:56,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:26:56,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:26:56,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:26:56,334 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:26:56,335 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:26:56,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml [2024-06-14 12:26:56,546 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:26:56,547 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:26:56,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-14 12:26:57,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:26:57,914 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:26:57,915 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-14 12:26:57,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e55785ff/271a578442ec4cb18f61328573509cdb/FLAG477d52057 [2024-06-14 12:26:57,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e55785ff/271a578442ec4cb18f61328573509cdb [2024-06-14 12:26:57,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:26:57,946 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:26:57,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:26:57,948 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:26:57,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:26:57,953 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:56" (1/2) ... [2024-06-14 12:26:57,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2610ab3b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:26:57, skipping insertion in model container [2024-06-14 12:26:57,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:56" (1/2) ... [2024-06-14 12:26:57,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@201800a5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:26:57, skipping insertion in model container [2024-06-14 12:26:57,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:26:57" (2/2) ... [2024-06-14 12:26:57,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2610ab3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:57, skipping insertion in model container [2024-06-14 12:26:57,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:26:57" (2/2) ... [2024-06-14 12:26:57,959 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:26:58,049 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:26:58,051 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-14 12:26:58,051 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-14 12:26:58,051 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-14 12:26:58,051 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:26:58,052 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-14 12:26:58,104 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:26:58,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:26:58,521 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:26:58,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:26:58,702 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:26:58,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58 WrapperNode [2024-06-14 12:26:58,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:26:58,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:26:58,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:26:58,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:26:58,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,780 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-14 12:26:58,784 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:26:58,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:26:58,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:26:58,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:26:58,796 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,813 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,842 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 12:26:58,842 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,842 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:26:58,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:26:58,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:26:58,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:26:58,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (1/1) ... [2024-06-14 12:26:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:26:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:26:58,905 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 12:26:58,914 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 12:26:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:26:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:26:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:26:58,940 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:26:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:26:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:26:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:26:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:26:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:26:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:26:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:26:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:26:58,943 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 12:26:59,062 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:26:59,064 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:26:59,419 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:26:59,419 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:26:59,606 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:26:59,606 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:26:59,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:26:59 BoogieIcfgContainer [2024-06-14 12:26:59,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:26:59,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:26:59,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:26:59,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:26:59,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:26:56" (1/4) ... [2024-06-14 12:26:59,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ce78f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:26:59, skipping insertion in model container [2024-06-14 12:26:59,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:26:57" (2/4) ... [2024-06-14 12:26:59,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ce78f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:26:59, skipping insertion in model container [2024-06-14 12:26:59,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:26:58" (3/4) ... [2024-06-14 12:26:59,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ce78f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:26:59, skipping insertion in model container [2024-06-14 12:26:59,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:26:59" (4/4) ... [2024-06-14 12:26:59,618 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-14 12:26:59,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:26:59,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:26:59,633 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:26:59,682 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:26:59,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:26:59,745 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:26:59,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:26:59,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:26:59,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:26:59,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:26:59,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:26:59,776 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;@77c4072d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:26:59,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:26:59,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:26:59,783 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:26:59,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:26:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:59,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:26:59,785 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 12:26:59,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1743886950, now seen corresponding path program 1 times [2024-06-14 12:26:59,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:59,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928361183] [2024-06-14 12:26:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:59,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:00,987 INFO 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 12:27:00,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:00,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928361183] [2024-06-14 12:27:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928361183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:00,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:27:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532402710] [2024-06-14 12:27:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:27:01,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:27:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:27:01,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 12:27:01,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:01,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:01,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 12:27:01,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:01,429 INFO L124 PetriNetUnfolderBase]: 1116/1802 cut-off events. [2024-06-14 12:27:01,429 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 12:27:01,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3555 conditions, 1802 events. 1116/1802 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9051 event pairs, 765 based on Foata normal form. 1/1733 useless extension candidates. Maximal degree in co-relation 3540. Up to 1676 conditions per place. [2024-06-14 12:27:01,448 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:27:01,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-14 12:27:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:27:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:27:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-14 12:27:01,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-14 12:27:01,461 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-14 12:27:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-14 12:27:01,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:01,468 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:01,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:27:01,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:27:01,473 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:27:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:01,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:01,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:01,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:27:01,474 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 12:27:01,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash -838079111, now seen corresponding path program 1 times [2024-06-14 12:27:01,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:01,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743237631] [2024-06-14 12:27:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:01,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:02,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:02,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743237631] [2024-06-14 12:27:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743237631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:02,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:27:02,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286178077] [2024-06-14 12:27:02,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:02,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:27:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:27:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:27:02,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:02,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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 12:27:02,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:02,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:02,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:02,636 INFO L124 PetriNetUnfolderBase]: 1280/1998 cut-off events. [2024-06-14 12:27:02,636 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-14 12:27:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 1998 events. 1280/1998 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9816 event pairs, 750 based on Foata normal form. 3/1965 useless extension candidates. Maximal degree in co-relation 4506. Up to 1897 conditions per place. [2024-06-14 12:27:02,651 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:27:02,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-14 12:27:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:27:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:27:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-14 12:27:02,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 12:27:02,656 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-14 12:27:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-14 12:27:02,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:27:02,661 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:02,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:27:02,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:27:02,662 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:27:02,663 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 12:27:02,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:02,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:02,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:27:02,666 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 12:27:02,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash -210647529, now seen corresponding path program 1 times [2024-06-14 12:27:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137037913] [2024-06-14 12:27:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:03,456 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 12:27:03,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137037913] [2024-06-14 12:27:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137037913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:27:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507764596] [2024-06-14 12:27:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:03,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:27:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:27:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:27:03,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:03,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:03,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:03,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:03,908 INFO L124 PetriNetUnfolderBase]: 1302/2077 cut-off events. [2024-06-14 12:27:03,909 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-14 12:27:03,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 2077 events. 1302/2077 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10516 event pairs, 470 based on Foata normal form. 7/2073 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-14 12:27:03,922 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-14 12:27:03,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 412 flow [2024-06-14 12:27:03,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 12:27:03,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-14 12:27:03,928 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 132 transitions. [2024-06-14 12:27:03,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 412 flow [2024-06-14 12:27:03,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 398 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:27:03,932 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 12:27:03,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 12:27:03,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:27:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 12:27:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:03,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:27:03,935 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 12:27:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -568775082, now seen corresponding path program 1 times [2024-06-14 12:27:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:03,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14967389] [2024-06-14 12:27:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:04,766 INFO 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 12:27:04,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:04,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14967389] [2024-06-14 12:27:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14967389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:04,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:04,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372027964] [2024-06-14 12:27:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:04,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:04,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 12:27:04,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:04,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:05,286 INFO L124 PetriNetUnfolderBase]: 1384/2221 cut-off events. [2024-06-14 12:27:05,286 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-14 12:27:05,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 2221 events. 1384/2221 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11486 event pairs, 321 based on Foata normal form. 26/2234 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-14 12:27:05,302 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-14 12:27:05,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 529 flow [2024-06-14 12:27:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:27:05,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 12:27:05,304 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:27:05,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 529 flow [2024-06-14 12:27:05,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:27:05,311 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 287 flow [2024-06-14 12:27:05,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-14 12:27:05,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 12:27:05,313 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 287 flow [2024-06-14 12:27:05,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 12:27:05,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:05,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:05,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:27:05,314 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 12:27:05,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1208652322, now seen corresponding path program 1 times [2024-06-14 12:27:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:05,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167255424] [2024-06-14 12:27:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:05,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:06,091 INFO 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 12:27:06,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167255424] [2024-06-14 12:27:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167255424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:06,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829844115] [2024-06-14 12:27:06,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:06,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:06,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:06,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:06,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:06,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:06,711 INFO L124 PetriNetUnfolderBase]: 1204/2038 cut-off events. [2024-06-14 12:27:06,712 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2024-06-14 12:27:06,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 2038 events. 1204/2038 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11049 event pairs, 447 based on Foata normal form. 4/2034 useless extension candidates. Maximal degree in co-relation 6349. Up to 1814 conditions per place. [2024-06-14 12:27:06,727 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-14 12:27:06,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 431 flow [2024-06-14 12:27:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-14 12:27:06,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-14 12:27:06,729 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 287 flow. Second operand 5 states and 106 transitions. [2024-06-14 12:27:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 431 flow [2024-06-14 12:27:06,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:06,739 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 267 flow [2024-06-14 12:27:06,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-14 12:27:06,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:27:06,741 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 267 flow [2024-06-14 12:27:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:06,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:27:06,743 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 12:27:06,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1880161743, now seen corresponding path program 1 times [2024-06-14 12:27:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:06,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457472970] [2024-06-14 12:27:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:07,580 INFO 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 12:27:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457472970] [2024-06-14 12:27:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457472970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:07,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521608077] [2024-06-14 12:27:07,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:07,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:07,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:07,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:27:07,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:07,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:07,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:08,373 INFO L124 PetriNetUnfolderBase]: 1386/2223 cut-off events. [2024-06-14 12:27:08,373 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2024-06-14 12:27:08,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2223 events. 1386/2223 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11474 event pairs, 459 based on Foata normal form. 8/2217 useless extension candidates. Maximal degree in co-relation 7054. Up to 1943 conditions per place. [2024-06-14 12:27:08,391 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-14 12:27:08,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 509 flow [2024-06-14 12:27:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 12:27:08,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077519379844961 [2024-06-14 12:27:08,392 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 267 flow. Second operand 6 states and 131 transitions. [2024-06-14 12:27:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 509 flow [2024-06-14 12:27:08,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 487 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:08,400 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 317 flow [2024-06-14 12:27:08,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 12:27:08,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 12:27:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 317 flow [2024-06-14 12:27:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:27:08,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:08,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:27:08,404 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 12:27:08,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1873611753, now seen corresponding path program 2 times [2024-06-14 12:27:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:08,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588097843] [2024-06-14 12:27:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:08,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:09,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588097843] [2024-06-14 12:27:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588097843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630547966] [2024-06-14 12:27:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:09,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:09,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:27:09,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:09,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:09,928 INFO L124 PetriNetUnfolderBase]: 1354/2152 cut-off events. [2024-06-14 12:27:09,929 INFO L125 PetriNetUnfolderBase]: For 5808/5808 co-relation queries the response was YES. [2024-06-14 12:27:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 2152 events. 1354/2152 cut-off events. For 5808/5808 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10870 event pairs, 469 based on Foata normal form. 4/2141 useless extension candidates. Maximal degree in co-relation 7129. Up to 1895 conditions per place. [2024-06-14 12:27:09,954 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-14 12:27:09,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 495 flow [2024-06-14 12:27:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-14 12:27:09,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2024-06-14 12:27:09,956 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 317 flow. Second operand 6 states and 127 transitions. [2024-06-14 12:27:09,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 495 flow [2024-06-14 12:27:09,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 466 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:09,964 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 336 flow [2024-06-14 12:27:09,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-06-14 12:27:09,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 12:27:09,965 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 336 flow [2024-06-14 12:27:09,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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 12:27:09,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:09,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:09,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:27:09,966 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 12:27:09,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1666816423, now seen corresponding path program 1 times [2024-06-14 12:27:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434547551] [2024-06-14 12:27:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:11,358 INFO 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 12:27:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434547551] [2024-06-14 12:27:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434547551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:11,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:11,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88527604] [2024-06-14 12:27:11,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:11,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:11,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:11,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:11,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:11,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:11,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:12,096 INFO L124 PetriNetUnfolderBase]: 1176/1973 cut-off events. [2024-06-14 12:27:12,096 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-14 12:27:12,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6562 conditions, 1973 events. 1176/1973 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10414 event pairs, 406 based on Foata normal form. 4/1963 useless extension candidates. Maximal degree in co-relation 6536. Up to 1742 conditions per place. [2024-06-14 12:27:12,112 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-14 12:27:12,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 569 flow [2024-06-14 12:27:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:27:12,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:27:12,114 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 336 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:27:12,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 569 flow [2024-06-14 12:27:12,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 499 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:12,123 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 346 flow [2024-06-14 12:27:12,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-14 12:27:12,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:27:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 346 flow [2024-06-14 12:27:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:12,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:12,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:27:12,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:12,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1850510522, now seen corresponding path program 1 times [2024-06-14 12:27:12,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:12,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345159553] [2024-06-14 12:27:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:12,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:13,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:13,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345159553] [2024-06-14 12:27:13,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345159553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:13,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:13,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:27:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788023851] [2024-06-14 12:27:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:13,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:27:13,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:27:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:27:13,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:13,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:13,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:13,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:13,456 INFO L124 PetriNetUnfolderBase]: 1173/1969 cut-off events. [2024-06-14 12:27:13,456 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-14 12:27:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 1969 events. 1173/1969 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10372 event pairs, 420 based on Foata normal form. 1/1956 useless extension candidates. Maximal degree in co-relation 6782. Up to 1771 conditions per place. [2024-06-14 12:27:13,470 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 56 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-14 12:27:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 514 flow [2024-06-14 12:27:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:27:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:27:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-14 12:27:13,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 12:27:13,475 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 346 flow. Second operand 5 states and 101 transitions. [2024-06-14 12:27:13,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 514 flow [2024-06-14 12:27:13,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 481 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:13,484 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 361 flow [2024-06-14 12:27:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-14 12:27:13,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-14 12:27:13,485 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 361 flow [2024-06-14 12:27:13,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:13,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:27:13,486 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:13,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1564318406, now seen corresponding path program 1 times [2024-06-14 12:27:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:13,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135897205] [2024-06-14 12:27:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:14,510 INFO 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 12:27:14,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:14,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135897205] [2024-06-14 12:27:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135897205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:14,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040504249] [2024-06-14 12:27:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:14,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:14,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:14,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:14,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:14,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:14,977 INFO L124 PetriNetUnfolderBase]: 1340/2155 cut-off events. [2024-06-14 12:27:14,977 INFO L125 PetriNetUnfolderBase]: For 9912/9912 co-relation queries the response was YES. [2024-06-14 12:27:14,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 2155 events. 1340/2155 cut-off events. For 9912/9912 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10986 event pairs, 492 based on Foata normal form. 1/2155 useless extension candidates. Maximal degree in co-relation 7926. Up to 2009 conditions per place. [2024-06-14 12:27:14,992 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 58 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-14 12:27:14,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 545 flow [2024-06-14 12:27:14,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 12:27:14,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:27:14,994 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 361 flow. Second operand 6 states and 112 transitions. [2024-06-14 12:27:14,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 545 flow [2024-06-14 12:27:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 519 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:15,002 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 393 flow [2024-06-14 12:27:15,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-14 12:27:15,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-14 12:27:15,003 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 393 flow [2024-06-14 12:27:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:15,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:27:15,004 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 12:27:15,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1432728446, now seen corresponding path program 1 times [2024-06-14 12:27:15,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:15,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023187439] [2024-06-14 12:27:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:15,963 INFO 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 12:27:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023187439] [2024-06-14 12:27:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023187439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:15,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:15,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318997934] [2024-06-14 12:27:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:15,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:16,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:16,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:16,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:16,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:16,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:16,740 INFO L124 PetriNetUnfolderBase]: 1543/2447 cut-off events. [2024-06-14 12:27:16,741 INFO L125 PetriNetUnfolderBase]: For 16170/16172 co-relation queries the response was YES. [2024-06-14 12:27:16,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9793 conditions, 2447 events. 1543/2447 cut-off events. For 16170/16172 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12646 event pairs, 357 based on Foata normal form. 16/2457 useless extension candidates. Maximal degree in co-relation 9763. Up to 1728 conditions per place. [2024-06-14 12:27:16,757 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-14 12:27:16,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 743 flow [2024-06-14 12:27:16,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 12:27:16,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-14 12:27:16,760 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-14 12:27:16,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 743 flow [2024-06-14 12:27:16,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 103 transitions, 707 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:16,771 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 433 flow [2024-06-14 12:27:16,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-06-14 12:27:16,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 12:27:16,772 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 433 flow [2024-06-14 12:27:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:16,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:16,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:16,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:27:16,773 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:16,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:16,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1435585406, now seen corresponding path program 2 times [2024-06-14 12:27:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762681469] [2024-06-14 12:27:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:17,607 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 12:27:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762681469] [2024-06-14 12:27:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762681469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259600657] [2024-06-14 12:27:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:17,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:17,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:17,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:17,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:17,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:18,416 INFO L124 PetriNetUnfolderBase]: 1581/2535 cut-off events. [2024-06-14 12:27:18,416 INFO L125 PetriNetUnfolderBase]: For 19100/19102 co-relation queries the response was YES. [2024-06-14 12:27:18,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10383 conditions, 2535 events. 1581/2535 cut-off events. For 19100/19102 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13379 event pairs, 510 based on Foata normal form. 24/2557 useless extension candidates. Maximal degree in co-relation 10352. Up to 2107 conditions per place. [2024-06-14 12:27:18,434 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-14 12:27:18,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 717 flow [2024-06-14 12:27:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:27:18,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-14 12:27:18,437 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 433 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:27:18,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 717 flow [2024-06-14 12:27:18,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 687 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:18,451 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 481 flow [2024-06-14 12:27:18,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-06-14 12:27:18,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-14 12:27:18,452 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 481 flow [2024-06-14 12:27:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:18,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:18,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:27:18,453 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:18,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1260671089, now seen corresponding path program 1 times [2024-06-14 12:27:18,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:18,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253337391] [2024-06-14 12:27:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:18,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:19,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:19,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253337391] [2024-06-14 12:27:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253337391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:19,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740403224] [2024-06-14 12:27:19,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:19,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:19,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 481 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:19,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:19,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:19,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:19,916 INFO L124 PetriNetUnfolderBase]: 1616/2587 cut-off events. [2024-06-14 12:27:19,916 INFO L125 PetriNetUnfolderBase]: For 20350/20350 co-relation queries the response was YES. [2024-06-14 12:27:19,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10974 conditions, 2587 events. 1616/2587 cut-off events. For 20350/20350 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13591 event pairs, 587 based on Foata normal form. 1/2587 useless extension candidates. Maximal degree in co-relation 10941. Up to 2404 conditions per place. [2024-06-14 12:27:19,933 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 70 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-14 12:27:19,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 707 flow [2024-06-14 12:27:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:27:19,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:27:19,935 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 481 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:27:19,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 707 flow [2024-06-14 12:27:19,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 653 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:19,958 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 487 flow [2024-06-14 12:27:19,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-06-14 12:27:19,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 12:27:19,959 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 487 flow [2024-06-14 12:27:19,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:19,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:19,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:19,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:27:19,960 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 12:27:19,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1165069012, now seen corresponding path program 1 times [2024-06-14 12:27:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728176055] [2024-06-14 12:27:19,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:19,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728176055] [2024-06-14 12:27:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728176055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459387132] [2024-06-14 12:27:21,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:21,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:21,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:21,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:21,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:22,069 INFO L124 PetriNetUnfolderBase]: 1644/2613 cut-off events. [2024-06-14 12:27:22,069 INFO L125 PetriNetUnfolderBase]: For 23360/23360 co-relation queries the response was YES. [2024-06-14 12:27:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11439 conditions, 2613 events. 1644/2613 cut-off events. For 23360/23360 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13661 event pairs, 546 based on Foata normal form. 4/2613 useless extension candidates. Maximal degree in co-relation 11405. Up to 2298 conditions per place. [2024-06-14 12:27:22,088 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 28 changer transitions 0/105 dead transitions. [2024-06-14 12:27:22,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 802 flow [2024-06-14 12:27:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:27:22,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 12:27:22,090 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 487 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:27:22,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 802 flow [2024-06-14 12:27:22,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 764 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:22,142 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 575 flow [2024-06-14 12:27:22,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=575, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-06-14 12:27:22,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 12:27:22,143 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 575 flow [2024-06-14 12:27:22,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:22,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:22,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:22,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:27:22,144 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 12:27:22,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash 211935514, now seen corresponding path program 2 times [2024-06-14 12:27:22,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:22,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094608980] [2024-06-14 12:27:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:23,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:23,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094608980] [2024-06-14 12:27:23,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094608980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:23,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:23,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660803304] [2024-06-14 12:27:23,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:23,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:23,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 575 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:23,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:23,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:23,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:24,355 INFO L124 PetriNetUnfolderBase]: 1636/2604 cut-off events. [2024-06-14 12:27:24,355 INFO L125 PetriNetUnfolderBase]: For 26832/26832 co-relation queries the response was YES. [2024-06-14 12:27:24,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 2604 events. 1636/2604 cut-off events. For 26832/26832 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13585 event pairs, 544 based on Foata normal form. 4/2604 useless extension candidates. Maximal degree in co-relation 11929. Up to 2286 conditions per place. [2024-06-14 12:27:24,373 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-14 12:27:24,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 112 transitions, 936 flow [2024-06-14 12:27:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:27:24,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 12:27:24,376 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 575 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:27:24,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 112 transitions, 936 flow [2024-06-14 12:27:24,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 853 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:24,401 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 670 flow [2024-06-14 12:27:24,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-14 12:27:24,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-14 12:27:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 670 flow [2024-06-14 12:27:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:24,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:24,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:24,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:27:24,403 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 12:27:24,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1723195528, now seen corresponding path program 3 times [2024-06-14 12:27:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545007166] [2024-06-14 12:27:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:25,654 INFO 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 12:27:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545007166] [2024-06-14 12:27:25,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545007166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:25,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:25,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702978488] [2024-06-14 12:27:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:25,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:25,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:25,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:25,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:25,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:26,469 INFO L124 PetriNetUnfolderBase]: 1669/2670 cut-off events. [2024-06-14 12:27:26,469 INFO L125 PetriNetUnfolderBase]: For 30141/30141 co-relation queries the response was YES. [2024-06-14 12:27:26,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12526 conditions, 2670 events. 1669/2670 cut-off events. For 30141/30141 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14076 event pairs, 449 based on Foata normal form. 4/2670 useless extension candidates. Maximal degree in co-relation 12488. Up to 2176 conditions per place. [2024-06-14 12:27:26,488 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 41 changer transitions 0/119 dead transitions. [2024-06-14 12:27:26,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1010 flow [2024-06-14 12:27:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:27:26,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-14 12:27:26,491 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 670 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:27:26,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1010 flow [2024-06-14 12:27:26,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 946 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:26,524 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 752 flow [2024-06-14 12:27:26,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-14 12:27:26,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-14 12:27:26,525 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 752 flow [2024-06-14 12:27:26,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:26,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:26,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:27:26,526 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:26,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash -227985551, now seen corresponding path program 2 times [2024-06-14 12:27:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500434931] [2024-06-14 12:27:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:27,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500434931] [2024-06-14 12:27:27,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500434931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:27,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:27,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385747591] [2024-06-14 12:27:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:27,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:27,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:27,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 752 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:27,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:27,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:27,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:27,907 INFO L124 PetriNetUnfolderBase]: 1666/2685 cut-off events. [2024-06-14 12:27:27,907 INFO L125 PetriNetUnfolderBase]: For 33150/33158 co-relation queries the response was YES. [2024-06-14 12:27:27,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12823 conditions, 2685 events. 1666/2685 cut-off events. For 33150/33158 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14292 event pairs, 548 based on Foata normal form. 7/2690 useless extension candidates. Maximal degree in co-relation 12783. Up to 2484 conditions per place. [2024-06-14 12:27:27,923 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 79 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-14 12:27:27,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 1002 flow [2024-06-14 12:27:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:27:27,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:27:27,925 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 752 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:27:27,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 1002 flow [2024-06-14 12:27:27,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 912 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:27,958 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 744 flow [2024-06-14 12:27:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=744, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-06-14 12:27:27,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 12:27:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 744 flow [2024-06-14 12:27:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:27,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:27,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:27,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:27:27,960 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 12:27:27,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1254951217, now seen corresponding path program 1 times [2024-06-14 12:27:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345792251] [2024-06-14 12:27:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:28,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345792251] [2024-06-14 12:27:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345792251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:28,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968412285] [2024-06-14 12:27:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:28,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:28,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:28,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:28,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:28,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:29,262 INFO L124 PetriNetUnfolderBase]: 1506/2504 cut-off events. [2024-06-14 12:27:29,262 INFO L125 PetriNetUnfolderBase]: For 31762/31762 co-relation queries the response was YES. [2024-06-14 12:27:29,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2504 events. 1506/2504 cut-off events. For 31762/31762 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13700 event pairs, 473 based on Foata normal form. 2/2505 useless extension candidates. Maximal degree in co-relation 11820. Up to 2262 conditions per place. [2024-06-14 12:27:29,277 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 90 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-06-14 12:27:29,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1006 flow [2024-06-14 12:27:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:27:29,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 12:27:29,279 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 744 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:27:29,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1006 flow [2024-06-14 12:27:29,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 946 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:29,303 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 742 flow [2024-06-14 12:27:29,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=89, 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=742, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-14 12:27:29,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-14 12:27:29,304 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 742 flow [2024-06-14 12:27:29,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:29,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:29,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:27:29,304 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:29,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:29,305 INFO L85 PathProgramCache]: Analyzing trace with hash -224128987, now seen corresponding path program 2 times [2024-06-14 12:27:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766369227] [2024-06-14 12:27:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:29,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766369227] [2024-06-14 12:27:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766369227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:30,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:30,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:27:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771508491] [2024-06-14 12:27:30,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:27:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:27:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:27:30,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:30,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:30,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:30,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:30,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:30,548 INFO L124 PetriNetUnfolderBase]: 1508/2510 cut-off events. [2024-06-14 12:27:30,548 INFO L125 PetriNetUnfolderBase]: For 34798/34800 co-relation queries the response was YES. [2024-06-14 12:27:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 2510 events. 1508/2510 cut-off events. For 34798/34800 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13784 event pairs, 477 based on Foata normal form. 4/2513 useless extension candidates. Maximal degree in co-relation 12232. Up to 2256 conditions per place. [2024-06-14 12:27:30,560 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 86 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-14 12:27:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 1010 flow [2024-06-14 12:27:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:27:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:27:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:27:30,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 12:27:30,562 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 742 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:27:30,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 1010 flow [2024-06-14 12:27:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 974 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:30,594 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 780 flow [2024-06-14 12:27:30,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-14 12:27:30,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 12:27:30,595 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 780 flow [2024-06-14 12:27:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:30,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:27:30,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:30,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash -224121051, now seen corresponding path program 1 times [2024-06-14 12:27:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:30,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449705247] [2024-06-14 12:27:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:31,444 INFO 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 12:27:31,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:31,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449705247] [2024-06-14 12:27:31,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449705247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:31,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:31,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:31,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932217455] [2024-06-14 12:27:31,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:31,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:31,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:31,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:31,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:31,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:31,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:31,896 INFO L124 PetriNetUnfolderBase]: 1590/2590 cut-off events. [2024-06-14 12:27:31,896 INFO L125 PetriNetUnfolderBase]: For 37624/37624 co-relation queries the response was YES. [2024-06-14 12:27:31,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2590 events. 1590/2590 cut-off events. For 37624/37624 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13862 event pairs, 500 based on Foata normal form. 1/2590 useless extension candidates. Maximal degree in co-relation 12987. Up to 2426 conditions per place. [2024-06-14 12:27:31,911 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-14 12:27:31,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 112 transitions, 1052 flow [2024-06-14 12:27:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:27:31,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:27:31,913 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 780 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:27:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 112 transitions, 1052 flow [2024-06-14 12:27:31,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 112 transitions, 1000 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:31,954 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 804 flow [2024-06-14 12:27:31,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=804, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2024-06-14 12:27:31,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:27:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 804 flow [2024-06-14 12:27:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:27:31,955 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:31,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1629777369, now seen corresponding path program 1 times [2024-06-14 12:27:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933511430] [2024-06-14 12:27:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933511430] [2024-06-14 12:27:32,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933511430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468347579] [2024-06-14 12:27:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:32,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:32,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 804 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:32,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:32,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:32,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:33,334 INFO L124 PetriNetUnfolderBase]: 1687/2722 cut-off events. [2024-06-14 12:27:33,334 INFO L125 PetriNetUnfolderBase]: For 48380/48382 co-relation queries the response was YES. [2024-06-14 12:27:33,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14456 conditions, 2722 events. 1687/2722 cut-off events. For 48380/48382 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14549 event pairs, 536 based on Foata normal form. 5/2726 useless extension candidates. Maximal degree in co-relation 14412. Up to 2449 conditions per place. [2024-06-14 12:27:33,349 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-14 12:27:33,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1180 flow [2024-06-14 12:27:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:27:33,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-14 12:27:33,350 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 804 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:27:33,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1180 flow [2024-06-14 12:27:33,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 1126 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:33,384 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 890 flow [2024-06-14 12:27:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-06-14 12:27:33,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 12:27:33,385 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 890 flow [2024-06-14 12:27:33,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:33,386 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 12:27:33,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:27:33,386 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 12:27:33,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 838259714, now seen corresponding path program 1 times [2024-06-14 12:27:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:33,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841425204] [2024-06-14 12:27:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:34,618 INFO 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 12:27:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:34,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841425204] [2024-06-14 12:27:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841425204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:34,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:34,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306143641] [2024-06-14 12:27:34,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:34,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:34,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:34,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:34,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:35,435 INFO L124 PetriNetUnfolderBase]: 1797/2921 cut-off events. [2024-06-14 12:27:35,435 INFO L125 PetriNetUnfolderBase]: For 55294/55296 co-relation queries the response was YES. [2024-06-14 12:27:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15970 conditions, 2921 events. 1797/2921 cut-off events. For 55294/55296 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16069 event pairs, 546 based on Foata normal form. 12/2931 useless extension candidates. Maximal degree in co-relation 15924. Up to 2271 conditions per place. [2024-06-14 12:27:35,450 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 37 changer transitions 0/147 dead transitions. [2024-06-14 12:27:35,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1320 flow [2024-06-14 12:27:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 12:27:35,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 12:27:35,452 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 890 flow. Second operand 8 states and 168 transitions. [2024-06-14 12:27:35,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1320 flow [2024-06-14 12:27:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1250 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:35,487 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 969 flow [2024-06-14 12:27:35,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-14 12:27:35,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 12:27:35,487 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 969 flow [2024-06-14 12:27:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:35,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:35,488 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 12:27:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:27:35,488 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 12:27:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -426097157, now seen corresponding path program 1 times [2024-06-14 12:27:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759022762] [2024-06-14 12:27:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:36,346 INFO 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 12:27:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759022762] [2024-06-14 12:27:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759022762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:36,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757043015] [2024-06-14 12:27:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:36,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:36,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:36,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:36,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:36,904 INFO L124 PetriNetUnfolderBase]: 1887/3013 cut-off events. [2024-06-14 12:27:36,905 INFO L125 PetriNetUnfolderBase]: For 58345/58345 co-relation queries the response was YES. [2024-06-14 12:27:36,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16789 conditions, 3013 events. 1887/3013 cut-off events. For 58345/58345 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16241 event pairs, 584 based on Foata normal form. 1/3013 useless extension candidates. Maximal degree in co-relation 16742. Up to 2868 conditions per place. [2024-06-14 12:27:36,923 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2024-06-14 12:27:36,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 133 transitions, 1309 flow [2024-06-14 12:27:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:27:36,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:27:36,924 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 969 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:27:36,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 133 transitions, 1309 flow [2024-06-14 12:27:36,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 133 transitions, 1258 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:36,965 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1002 flow [2024-06-14 12:27:36,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-14 12:27:36,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 12:27:36,966 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1002 flow [2024-06-14 12:27:36,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:36,966 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 12:27:36,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:27:36,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:36,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash -83798939, now seen corresponding path program 2 times [2024-06-14 12:27:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:36,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564013745] [2024-06-14 12:27:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:36,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:37,800 INFO 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 12:27:37,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:37,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564013745] [2024-06-14 12:27:37,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564013745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:37,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:37,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277341830] [2024-06-14 12:27:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:37,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:37,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:37,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:37,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:37,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:37,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:37,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:38,311 INFO L124 PetriNetUnfolderBase]: 1863/3024 cut-off events. [2024-06-14 12:27:38,312 INFO L125 PetriNetUnfolderBase]: For 65028/65030 co-relation queries the response was YES. [2024-06-14 12:27:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17292 conditions, 3024 events. 1863/3024 cut-off events. For 65028/65030 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16749 event pairs, 561 based on Foata normal form. 5/3028 useless extension candidates. Maximal degree in co-relation 17244. Up to 2677 conditions per place. [2024-06-14 12:27:38,330 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-06-14 12:27:38,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1482 flow [2024-06-14 12:27:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:27:38,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-14 12:27:38,331 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1002 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:27:38,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1482 flow [2024-06-14 12:27:38,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1420 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:38,377 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1134 flow [2024-06-14 12:27:38,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-14 12:27:38,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 12:27:38,378 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1134 flow [2024-06-14 12:27:38,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:38,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:38,378 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 12:27:38,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:27:38,378 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 12:27:38,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash 26860728, now seen corresponding path program 2 times [2024-06-14 12:27:38,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:38,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751689964] [2024-06-14 12:27:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:38,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:39,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751689964] [2024-06-14 12:27:39,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751689964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:39,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:39,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397466109] [2024-06-14 12:27:39,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:39,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:39,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:39,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:39,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1134 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:39,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:39,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:39,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:40,149 INFO L124 PetriNetUnfolderBase]: 1843/2991 cut-off events. [2024-06-14 12:27:40,149 INFO L125 PetriNetUnfolderBase]: For 72190/72192 co-relation queries the response was YES. [2024-06-14 12:27:40,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17812 conditions, 2991 events. 1843/2991 cut-off events. For 72190/72192 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16497 event pairs, 347 based on Foata normal form. 12/3001 useless extension candidates. Maximal degree in co-relation 17762. Up to 1909 conditions per place. [2024-06-14 12:27:40,167 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 107 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-14 12:27:40,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1528 flow [2024-06-14 12:27:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 12:27:40,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-14 12:27:40,168 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1134 flow. Second operand 7 states and 151 transitions. [2024-06-14 12:27:40,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1528 flow [2024-06-14 12:27:40,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 1451 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:40,234 INFO L231 Difference]: Finished difference. Result has 119 places, 125 transitions, 1146 flow [2024-06-14 12:27:40,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=119, PETRI_TRANSITIONS=125} [2024-06-14 12:27:40,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 12:27:40,235 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 125 transitions, 1146 flow [2024-06-14 12:27:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:40,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:40,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:27:40,236 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 12:27:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1540079290, now seen corresponding path program 3 times [2024-06-14 12:27:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137010470] [2024-06-14 12:27:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:41,242 INFO 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 12:27:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:41,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137010470] [2024-06-14 12:27:41,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137010470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:41,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:41,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:41,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828436691] [2024-06-14 12:27:41,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:41,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:41,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:41,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:41,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:41,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:41,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 125 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:41,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:41,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:41,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:41,927 INFO L124 PetriNetUnfolderBase]: 1823/2960 cut-off events. [2024-06-14 12:27:41,927 INFO L125 PetriNetUnfolderBase]: For 74636/74638 co-relation queries the response was YES. [2024-06-14 12:27:41,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 2960 events. 1823/2960 cut-off events. For 74636/74638 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16364 event pairs, 310 based on Foata normal form. 12/2967 useless extension candidates. Maximal degree in co-relation 17719. Up to 1767 conditions per place. [2024-06-14 12:27:41,947 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 102 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2024-06-14 12:27:41,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1482 flow [2024-06-14 12:27:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:27:41,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:27:41,948 INFO L175 Difference]: Start difference. First operand has 119 places, 125 transitions, 1146 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:27:41,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1482 flow [2024-06-14 12:27:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 149 transitions, 1378 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:42,006 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1092 flow [2024-06-14 12:27:42,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-06-14 12:27:42,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-14 12:27:42,007 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1092 flow [2024-06-14 12:27:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:42,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:42,007 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 12:27:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:27:42,007 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:42,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -71834117, now seen corresponding path program 2 times [2024-06-14 12:27:42,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:42,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317455507] [2024-06-14 12:27:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:42,886 INFO 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 12:27:42,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317455507] [2024-06-14 12:27:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317455507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:42,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:42,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021186636] [2024-06-14 12:27:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:42,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:42,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1092 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:42,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:42,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:42,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:43,408 INFO L124 PetriNetUnfolderBase]: 1903/3043 cut-off events. [2024-06-14 12:27:43,408 INFO L125 PetriNetUnfolderBase]: For 71231/71241 co-relation queries the response was YES. [2024-06-14 12:27:43,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3043 events. 1903/3043 cut-off events. For 71231/71241 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16510 event pairs, 569 based on Foata normal form. 9/3050 useless extension candidates. Maximal degree in co-relation 18041. Up to 2866 conditions per place. [2024-06-14 12:27:43,429 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 110 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-14 12:27:43,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 1548 flow [2024-06-14 12:27:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:27:43,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:27:43,430 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1092 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:27:43,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 1548 flow [2024-06-14 12:27:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1437 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:43,472 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 1153 flow [2024-06-14 12:27:43,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-06-14 12:27:43,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 12:27:43,472 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 1153 flow [2024-06-14 12:27:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:43,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:43,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:43,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:27:43,473 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:43,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash -71834489, now seen corresponding path program 3 times [2024-06-14 12:27:43,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:43,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582363752] [2024-06-14 12:27:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:43,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:44,236 INFO 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 12:27:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:44,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582363752] [2024-06-14 12:27:44,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582363752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:44,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:44,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059430660] [2024-06-14 12:27:44,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:44,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:44,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:44,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 1153 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:44,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:44,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:44,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:44,734 INFO L124 PetriNetUnfolderBase]: 1855/3012 cut-off events. [2024-06-14 12:27:44,734 INFO L125 PetriNetUnfolderBase]: For 78024/78026 co-relation queries the response was YES. [2024-06-14 12:27:44,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18053 conditions, 3012 events. 1855/3012 cut-off events. For 78024/78026 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16674 event pairs, 566 based on Foata normal form. 5/3013 useless extension candidates. Maximal degree in co-relation 18000. Up to 2598 conditions per place. [2024-06-14 12:27:44,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-14 12:27:44,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 153 transitions, 1719 flow [2024-06-14 12:27:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:27:44,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:27:44,755 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 1153 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:27:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 153 transitions, 1719 flow [2024-06-14 12:27:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1647 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:44,812 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1317 flow [2024-06-14 12:27:44,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-14 12:27:44,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:27:44,813 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1317 flow [2024-06-14 12:27:44,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:44,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:44,813 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 12:27:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:27:44,814 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 12:27:44,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -71418407, now seen corresponding path program 3 times [2024-06-14 12:27:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597410426] [2024-06-14 12:27:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:44,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:45,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:45,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597410426] [2024-06-14 12:27:45,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597410426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:45,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:45,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:45,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71739140] [2024-06-14 12:27:45,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:45,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:45,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:45,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:45,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:45,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:46,216 INFO L124 PetriNetUnfolderBase]: 1927/3083 cut-off events. [2024-06-14 12:27:46,217 INFO L125 PetriNetUnfolderBase]: For 84629/84639 co-relation queries the response was YES. [2024-06-14 12:27:46,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19253 conditions, 3083 events. 1927/3083 cut-off events. For 84629/84639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16732 event pairs, 575 based on Foata normal form. 9/3090 useless extension candidates. Maximal degree in co-relation 19197. Up to 2901 conditions per place. [2024-06-14 12:27:46,237 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-14 12:27:46,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 148 transitions, 1627 flow [2024-06-14 12:27:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:27:46,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:27:46,239 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1317 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:27:46,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 148 transitions, 1627 flow [2024-06-14 12:27:46,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 148 transitions, 1453 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:46,298 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1203 flow [2024-06-14 12:27:46,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1203, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-14 12:27:46,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 12:27:46,299 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1203 flow [2024-06-14 12:27:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:46,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:46,300 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 12:27:46,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:27:46,300 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 12:27:46,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -248901281, now seen corresponding path program 1 times [2024-06-14 12:27:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794029265] [2024-06-14 12:27:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:47,248 INFO 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 12:27:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794029265] [2024-06-14 12:27:47,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794029265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399463021] [2024-06-14 12:27:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:47,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:27:47,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:47,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:47,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:27:47,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:47,862 INFO L124 PetriNetUnfolderBase]: 1663/2810 cut-off events. [2024-06-14 12:27:47,863 INFO L125 PetriNetUnfolderBase]: For 75216/75216 co-relation queries the response was YES. [2024-06-14 12:27:47,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16626 conditions, 2810 events. 1663/2810 cut-off events. For 75216/75216 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16100 event pairs, 459 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 16569. Up to 2500 conditions per place. [2024-06-14 12:27:47,882 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-14 12:27:47,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 1581 flow [2024-06-14 12:27:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:27:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:27:47,884 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1203 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:27:47,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 1581 flow [2024-06-14 12:27:47,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 1519 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:47,940 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1227 flow [2024-06-14 12:27:47,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-14 12:27:47,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 12:27:47,940 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1227 flow [2024-06-14 12:27:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:47,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:47,941 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 12:27:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:27:47,941 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 12:27:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -248781125, now seen corresponding path program 1 times [2024-06-14 12:27:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683943951] [2024-06-14 12:27:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:48,692 INFO 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 12:27:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:48,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683943951] [2024-06-14 12:27:48,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683943951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:48,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:48,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768265489] [2024-06-14 12:27:48,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:48,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:48,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:48,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1227 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:48,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:48,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:48,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:49,228 INFO L124 PetriNetUnfolderBase]: 1767/2920 cut-off events. [2024-06-14 12:27:49,228 INFO L125 PetriNetUnfolderBase]: For 80379/80379 co-relation queries the response was YES. [2024-06-14 12:27:49,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17530 conditions, 2920 events. 1767/2920 cut-off events. For 80379/80379 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16381 event pairs, 498 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 17472. Up to 2683 conditions per place. [2024-06-14 12:27:49,250 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2024-06-14 12:27:49,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 159 transitions, 1623 flow [2024-06-14 12:27:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:27:49,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:27:49,252 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1227 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:27:49,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 159 transitions, 1623 flow [2024-06-14 12:27:49,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1559 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:49,307 INFO L231 Difference]: Finished difference. Result has 131 places, 144 transitions, 1245 flow [2024-06-14 12:27:49,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=131, PETRI_TRANSITIONS=144} [2024-06-14 12:27:49,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 12:27:49,308 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 144 transitions, 1245 flow [2024-06-14 12:27:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:49,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:49,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:49,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:27:49,308 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:49,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1641936933, now seen corresponding path program 2 times [2024-06-14 12:27:49,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265983866] [2024-06-14 12:27:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:49,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:50,116 INFO 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 12:27:50,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265983866] [2024-06-14 12:27:50,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265983866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:50,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:50,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:50,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134484052] [2024-06-14 12:27:50,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:50,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:50,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 144 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:50,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:50,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:50,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:50,633 INFO L124 PetriNetUnfolderBase]: 1785/2930 cut-off events. [2024-06-14 12:27:50,633 INFO L125 PetriNetUnfolderBase]: For 83861/83863 co-relation queries the response was YES. [2024-06-14 12:27:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18138 conditions, 2930 events. 1785/2930 cut-off events. For 83861/83863 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16288 event pairs, 505 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 18079. Up to 2679 conditions per place. [2024-06-14 12:27:50,653 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2024-06-14 12:27:50,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 164 transitions, 1767 flow [2024-06-14 12:27:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:27:50,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 12:27:50,655 INFO L175 Difference]: Start difference. First operand has 131 places, 144 transitions, 1245 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:27:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 164 transitions, 1767 flow [2024-06-14 12:27:50,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 164 transitions, 1707 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:50,720 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1345 flow [2024-06-14 12:27:50,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-14 12:27:50,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:27:50,721 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1345 flow [2024-06-14 12:27:50,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:50,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:50,722 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 12:27:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:27:50,722 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 12:27:50,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1642174083, now seen corresponding path program 3 times [2024-06-14 12:27:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:50,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886053612] [2024-06-14 12:27:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:51,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886053612] [2024-06-14 12:27:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886053612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211476011] [2024-06-14 12:27:51,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:51,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:51,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:51,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:51,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:51,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:51,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:51,964 INFO L124 PetriNetUnfolderBase]: 1779/2922 cut-off events. [2024-06-14 12:27:51,965 INFO L125 PetriNetUnfolderBase]: For 88858/88860 co-relation queries the response was YES. [2024-06-14 12:27:51,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18432 conditions, 2922 events. 1779/2922 cut-off events. For 88858/88860 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16280 event pairs, 502 based on Foata normal form. 4/2925 useless extension candidates. Maximal degree in co-relation 18372. Up to 2674 conditions per place. [2024-06-14 12:27:51,986 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-14 12:27:51,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 163 transitions, 1707 flow [2024-06-14 12:27:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:27:51,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:27:51,987 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1345 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:27:51,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 163 transitions, 1707 flow [2024-06-14 12:27:52,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 163 transitions, 1609 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:52,053 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1307 flow [2024-06-14 12:27:52,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-14 12:27:52,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 12:27:52,053 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1307 flow [2024-06-14 12:27:52,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:52,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:52,054 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 12:27:52,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:27:52,054 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:52,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash -333375003, now seen corresponding path program 1 times [2024-06-14 12:27:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:52,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538843940] [2024-06-14 12:27:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:52,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:52,841 INFO 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 12:27:52,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:52,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538843940] [2024-06-14 12:27:52,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538843940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:52,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095225523] [2024-06-14 12:27:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:52,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:52,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:52,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:52,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:53,504 INFO L124 PetriNetUnfolderBase]: 1961/3134 cut-off events. [2024-06-14 12:27:53,505 INFO L125 PetriNetUnfolderBase]: For 111140/111142 co-relation queries the response was YES. [2024-06-14 12:27:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20571 conditions, 3134 events. 1961/3134 cut-off events. For 111140/111142 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17104 event pairs, 573 based on Foata normal form. 5/3138 useless extension candidates. Maximal degree in co-relation 20509. Up to 2885 conditions per place. [2024-06-14 12:27:53,527 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 28 changer transitions 0/179 dead transitions. [2024-06-14 12:27:53,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 179 transitions, 1797 flow [2024-06-14 12:27:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:27:53,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:27:53,529 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1307 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:27:53,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 179 transitions, 1797 flow [2024-06-14 12:27:53,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 179 transitions, 1733 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:53,598 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1382 flow [2024-06-14 12:27:53,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-14 12:27:53,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 12:27:53,599 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1382 flow [2024-06-14 12:27:53,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:53,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:53,599 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 12:27:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:27:53,599 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:53,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -329830866, now seen corresponding path program 1 times [2024-06-14 12:27:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:53,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472566457] [2024-06-14 12:27:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:54,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472566457] [2024-06-14 12:27:54,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472566457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:54,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:54,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:54,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509715169] [2024-06-14 12:27:54,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:54,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:54,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:54,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:54,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:54,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:54,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:54,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:54,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:54,949 INFO L124 PetriNetUnfolderBase]: 1924/3109 cut-off events. [2024-06-14 12:27:54,950 INFO L125 PetriNetUnfolderBase]: For 120771/120773 co-relation queries the response was YES. [2024-06-14 12:27:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 3109 events. 1924/3109 cut-off events. For 120771/120773 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17251 event pairs, 547 based on Foata normal form. 6/3114 useless extension candidates. Maximal degree in co-relation 21162. Up to 2774 conditions per place. [2024-06-14 12:27:54,974 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 23 changer transitions 0/178 dead transitions. [2024-06-14 12:27:54,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1823 flow [2024-06-14 12:27:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:27:54,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-14 12:27:54,975 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1382 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:27:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1823 flow [2024-06-14 12:27:55,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 178 transitions, 1712 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:55,064 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1389 flow [2024-06-14 12:27:55,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-14 12:27:55,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 12:27:55,065 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1389 flow [2024-06-14 12:27:55,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:55,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:55,065 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 12:27:55,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:27:55,065 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:55,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash -324116946, now seen corresponding path program 2 times [2024-06-14 12:27:55,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:55,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959788485] [2024-06-14 12:27:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:55,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:55,807 INFO 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 12:27:55,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:55,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959788485] [2024-06-14 12:27:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959788485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:55,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:55,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:27:55,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122754649] [2024-06-14 12:27:55,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:27:55,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:27:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:27:55,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:27:55,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:55,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:55,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:27:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:56,442 INFO L124 PetriNetUnfolderBase]: 1926/3117 cut-off events. [2024-06-14 12:27:56,442 INFO L125 PetriNetUnfolderBase]: For 125710/125712 co-relation queries the response was YES. [2024-06-14 12:27:56,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3117 events. 1926/3117 cut-off events. For 125710/125712 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17375 event pairs, 546 based on Foata normal form. 6/3122 useless extension candidates. Maximal degree in co-relation 21284. Up to 2723 conditions per place. [2024-06-14 12:27:56,469 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 35 changer transitions 0/180 dead transitions. [2024-06-14 12:27:56,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 180 transitions, 1903 flow [2024-06-14 12:27:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:27:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:27:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:27:56,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-14 12:27:56,471 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1389 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:27:56,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 180 transitions, 1903 flow [2024-06-14 12:27:56,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 180 transitions, 1841 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:56,576 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1464 flow [2024-06-14 12:27:56,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1464, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2024-06-14 12:27:56,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 12:27:56,577 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1464 flow [2024-06-14 12:27:56,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:27:56,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:56,578 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 12:27:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:27:56,578 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:56,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2079825596, now seen corresponding path program 1 times [2024-06-14 12:27:56,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:56,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515405809] [2024-06-14 12:27:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:56,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:57,403 INFO 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 12:27:57,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515405809] [2024-06-14 12:27:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515405809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772217534] [2024-06-14 12:27:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:57,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:57,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1464 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:57,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:57,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:57,976 INFO L124 PetriNetUnfolderBase]: 1990/3180 cut-off events. [2024-06-14 12:27:57,976 INFO L125 PetriNetUnfolderBase]: For 129180/129180 co-relation queries the response was YES. [2024-06-14 12:27:57,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3180 events. 1990/3180 cut-off events. For 129180/129180 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17398 event pairs, 567 based on Foata normal form. 1/3180 useless extension candidates. Maximal degree in co-relation 21763. Up to 3002 conditions per place. [2024-06-14 12:27:58,001 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-14 12:27:58,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 181 transitions, 1918 flow [2024-06-14 12:27:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:27:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:27:58,002 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1464 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:27:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 181 transitions, 1918 flow [2024-06-14 12:27:58,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1831 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:58,101 INFO L231 Difference]: Finished difference. Result has 148 places, 164 transitions, 1483 flow [2024-06-14 12:27:58,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=148, PETRI_TRANSITIONS=164} [2024-06-14 12:27:58,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 12:27:58,101 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 164 transitions, 1483 flow [2024-06-14 12:27:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:58,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:58,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:58,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:27:58,102 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:58,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:58,102 INFO L85 PathProgramCache]: Analyzing trace with hash -324109413, now seen corresponding path program 2 times [2024-06-14 12:27:58,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:58,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477861917] [2024-06-14 12:27:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:58,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:58,932 INFO 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 12:27:58,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:58,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477861917] [2024-06-14 12:27:58,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477861917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:58,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:58,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:58,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692760175] [2024-06-14 12:27:58,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:58,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:59,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:59,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 164 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:59,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:59,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:59,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:59,505 INFO L124 PetriNetUnfolderBase]: 2049/3269 cut-off events. [2024-06-14 12:27:59,505 INFO L125 PetriNetUnfolderBase]: For 138018/138020 co-relation queries the response was YES. [2024-06-14 12:27:59,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 3269 events. 2049/3269 cut-off events. For 138018/138020 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17916 event pairs, 561 based on Foata normal form. 5/3273 useless extension candidates. Maximal degree in co-relation 22811. Up to 2876 conditions per place. [2024-06-14 12:27:59,529 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-14 12:27:59,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 2261 flow [2024-06-14 12:27:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:27:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:27:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:27:59,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:27:59,530 INFO L175 Difference]: Start difference. First operand has 148 places, 164 transitions, 1483 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:27:59,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 2261 flow [2024-06-14 12:27:59,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 2177 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:59,639 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1671 flow [2024-06-14 12:27:59,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1671, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-14 12:27:59,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 12:27:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1671 flow [2024-06-14 12:27:59,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:59,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:59,640 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 12:27:59,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:27:59,640 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 12:27:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -324120573, now seen corresponding path program 3 times [2024-06-14 12:27:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:59,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567166065] [2024-06-14 12:27:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:59,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567166065] [2024-06-14 12:28:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567166065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:00,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:00,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:00,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998708270] [2024-06-14 12:28:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:00,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:00,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1671 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:00,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:00,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:00,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:01,059 INFO L124 PetriNetUnfolderBase]: 2060/3287 cut-off events. [2024-06-14 12:28:01,060 INFO L125 PetriNetUnfolderBase]: For 148932/148934 co-relation queries the response was YES. [2024-06-14 12:28:01,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23903 conditions, 3287 events. 2060/3287 cut-off events. For 148932/148934 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18091 event pairs, 566 based on Foata normal form. 5/3291 useless extension candidates. Maximal degree in co-relation 23835. Up to 2889 conditions per place. [2024-06-14 12:28:01,099 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 144 selfloop transitions, 48 changer transitions 0/197 dead transitions. [2024-06-14 12:28:01,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2286 flow [2024-06-14 12:28:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:28:01,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:28:01,101 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1671 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:28:01,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2286 flow [2024-06-14 12:28:01,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 2148 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:01,231 INFO L231 Difference]: Finished difference. Result has 155 places, 176 transitions, 1727 flow [2024-06-14 12:28:01,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1727, PETRI_PLACES=155, PETRI_TRANSITIONS=176} [2024-06-14 12:28:01,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 12:28:01,232 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 176 transitions, 1727 flow [2024-06-14 12:28:01,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:01,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:01,232 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 12:28:01,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:28:01,232 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 12:28:01,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2090526246, now seen corresponding path program 3 times [2024-06-14 12:28:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142869551] [2024-06-14 12:28:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:01,905 INFO 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 12:28:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142869551] [2024-06-14 12:28:01,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142869551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:01,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:01,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:01,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793470900] [2024-06-14 12:28:01,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:01,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:01,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:01,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 176 transitions, 1727 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:02,519 INFO L124 PetriNetUnfolderBase]: 1988/3200 cut-off events. [2024-06-14 12:28:02,519 INFO L125 PetriNetUnfolderBase]: For 154540/154540 co-relation queries the response was YES. [2024-06-14 12:28:02,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23638 conditions, 3200 events. 1988/3200 cut-off events. For 154540/154540 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17718 event pairs, 572 based on Foata normal form. 2/3198 useless extension candidates. Maximal degree in co-relation 23568. Up to 2844 conditions per place. [2024-06-14 12:28:02,543 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-14 12:28:02,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 193 transitions, 2127 flow [2024-06-14 12:28:02,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:28:02,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:28:02,545 INFO L175 Difference]: Start difference. First operand has 155 places, 176 transitions, 1727 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:28:02,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 193 transitions, 2127 flow [2024-06-14 12:28:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 193 transitions, 1977 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:02,723 INFO L231 Difference]: Finished difference. Result has 157 places, 176 transitions, 1629 flow [2024-06-14 12:28:02,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1629, PETRI_PLACES=157, PETRI_TRANSITIONS=176} [2024-06-14 12:28:02,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 12:28:02,724 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 176 transitions, 1629 flow [2024-06-14 12:28:02,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:02,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:02,725 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 12:28:02,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:28:02,725 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 12:28:02,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1525577038, now seen corresponding path program 4 times [2024-06-14 12:28:02,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:02,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495661937] [2024-06-14 12:28:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:02,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:03,435 INFO 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 12:28:03,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:03,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495661937] [2024-06-14 12:28:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495661937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:03,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772622906] [2024-06-14 12:28:03,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:03,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:03,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 176 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:03,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:04,062 INFO L124 PetriNetUnfolderBase]: 2013/3237 cut-off events. [2024-06-14 12:28:04,062 INFO L125 PetriNetUnfolderBase]: For 163458/163474 co-relation queries the response was YES. [2024-06-14 12:28:04,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23969 conditions, 3237 events. 2013/3237 cut-off events. For 163458/163474 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18088 event pairs, 558 based on Foata normal form. 2/3220 useless extension candidates. Maximal degree in co-relation 23898. Up to 2853 conditions per place. [2024-06-14 12:28:04,086 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-14 12:28:04,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 194 transitions, 2083 flow [2024-06-14 12:28:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:28:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:28:04,087 INFO L175 Difference]: Start difference. First operand has 157 places, 176 transitions, 1629 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:28:04,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 194 transitions, 2083 flow [2024-06-14 12:28:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 194 transitions, 1945 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 12:28:04,171 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1619 flow [2024-06-14 12:28:04,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1619, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-14 12:28:04,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 12:28:04,172 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1619 flow [2024-06-14 12:28:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:04,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:04,172 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 12:28:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:28:04,173 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 12:28:04,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2068102702, now seen corresponding path program 5 times [2024-06-14 12:28:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:04,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777732213] [2024-06-14 12:28:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:04,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777732213] [2024-06-14 12:28:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777732213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:04,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637228508] [2024-06-14 12:28:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:04,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:04,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1619 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:04,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:04,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:04,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:05,508 INFO L124 PetriNetUnfolderBase]: 2011/3249 cut-off events. [2024-06-14 12:28:05,508 INFO L125 PetriNetUnfolderBase]: For 170314/170332 co-relation queries the response was YES. [2024-06-14 12:28:05,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24092 conditions, 3249 events. 2011/3249 cut-off events. For 170314/170332 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18305 event pairs, 567 based on Foata normal form. 6/3236 useless extension candidates. Maximal degree in co-relation 24020. Up to 2757 conditions per place. [2024-06-14 12:28:05,533 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-14 12:28:05,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 2165 flow [2024-06-14 12:28:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:28:05,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 12:28:05,534 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1619 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:28:05,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 2165 flow [2024-06-14 12:28:05,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 196 transitions, 2069 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:05,652 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 1693 flow [2024-06-14 12:28:05,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-06-14 12:28:05,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:28:05,653 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 1693 flow [2024-06-14 12:28:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:05,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:05,653 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 12:28:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:28:05,654 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 12:28:05,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash -639575548, now seen corresponding path program 6 times [2024-06-14 12:28:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:05,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220518964] [2024-06-14 12:28:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:06,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:06,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220518964] [2024-06-14 12:28:06,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220518964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:06,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:28:06,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951486993] [2024-06-14 12:28:06,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:06,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:28:06,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:06,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:28:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:28:06,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:06,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:06,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:06,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:06,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:07,042 INFO L124 PetriNetUnfolderBase]: 2001/3237 cut-off events. [2024-06-14 12:28:07,042 INFO L125 PetriNetUnfolderBase]: For 173787/173805 co-relation queries the response was YES. [2024-06-14 12:28:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3237 events. 2001/3237 cut-off events. For 173787/173805 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18239 event pairs, 572 based on Foata normal form. 4/3222 useless extension candidates. Maximal degree in co-relation 24051. Up to 2749 conditions per place. [2024-06-14 12:28:07,068 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 123 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-14 12:28:07,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 195 transitions, 2097 flow [2024-06-14 12:28:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:28:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:28:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:28:07,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-14 12:28:07,069 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 1693 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:28:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 195 transitions, 2097 flow [2024-06-14 12:28:07,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 195 transitions, 1941 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:07,220 INFO L231 Difference]: Finished difference. Result has 159 places, 182 transitions, 1653 flow [2024-06-14 12:28:07,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=159, PETRI_TRANSITIONS=182} [2024-06-14 12:28:07,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 12:28:07,221 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 182 transitions, 1653 flow [2024-06-14 12:28:07,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 12:28:07,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:07,221 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 12:28:07,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:28:07,221 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 12:28:07,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash -632394925, now seen corresponding path program 4 times [2024-06-14 12:28:07,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:07,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981997525] [2024-06-14 12:28:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:07,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:08,044 INFO 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 12:28:08,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:08,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981997525] [2024-06-14 12:28:08,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981997525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:08,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979511772] [2024-06-14 12:28:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:08,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:08,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:08,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 182 transitions, 1653 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:08,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:08,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:08,684 INFO L124 PetriNetUnfolderBase]: 2117/3373 cut-off events. [2024-06-14 12:28:08,684 INFO L125 PetriNetUnfolderBase]: For 182554/182556 co-relation queries the response was YES. [2024-06-14 12:28:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25233 conditions, 3373 events. 2117/3373 cut-off events. For 182554/182556 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18589 event pairs, 591 based on Foata normal form. 5/3374 useless extension candidates. Maximal degree in co-relation 25159. Up to 2788 conditions per place. [2024-06-14 12:28:08,710 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 83 changer transitions 0/212 dead transitions. [2024-06-14 12:28:08,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2583 flow [2024-06-14 12:28:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:28:08,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:28:08,711 INFO L175 Difference]: Start difference. First operand has 159 places, 182 transitions, 1653 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:28:08,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2583 flow [2024-06-14 12:28:08,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 2433 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:08,860 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 1916 flow [2024-06-14 12:28:08,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-14 12:28:08,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:28:08,861 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 1916 flow [2024-06-14 12:28:08,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:08,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:08,861 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 12:28:08,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:28:08,862 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 12:28:08,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash -632394522, now seen corresponding path program 2 times [2024-06-14 12:28:08,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:08,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699975862] [2024-06-14 12:28:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:08,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:09,671 INFO 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 12:28:09,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:09,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699975862] [2024-06-14 12:28:09,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699975862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:09,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:09,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:09,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526332610] [2024-06-14 12:28:09,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:09,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:09,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:09,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:09,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 1916 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:09,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:09,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:09,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:10,282 INFO L124 PetriNetUnfolderBase]: 2130/3393 cut-off events. [2024-06-14 12:28:10,282 INFO L125 PetriNetUnfolderBase]: For 195383/195393 co-relation queries the response was YES. [2024-06-14 12:28:10,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26382 conditions, 3393 events. 2130/3393 cut-off events. For 195383/195393 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18733 event pairs, 595 based on Foata normal form. 9/3400 useless extension candidates. Maximal degree in co-relation 26306. Up to 3168 conditions per place. [2024-06-14 12:28:10,311 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 38 changer transitions 0/217 dead transitions. [2024-06-14 12:28:10,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2778 flow [2024-06-14 12:28:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:28:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:28:10,313 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 1916 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:28:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2778 flow [2024-06-14 12:28:10,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 217 transitions, 2606 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:10,479 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2089 flow [2024-06-14 12:28:10,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2089, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-06-14 12:28:10,479 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:28:10,480 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2089 flow [2024-06-14 12:28:10,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:10,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:10,480 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 12:28:10,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:28:10,480 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 12:28:10,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash -631949052, now seen corresponding path program 3 times [2024-06-14 12:28:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530665393] [2024-06-14 12:28:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:11,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530665393] [2024-06-14 12:28:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530665393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:11,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:11,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:11,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637989885] [2024-06-14 12:28:11,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:11,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:11,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:11,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2089 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:11,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:11,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:11,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:11,904 INFO L124 PetriNetUnfolderBase]: 2127/3389 cut-off events. [2024-06-14 12:28:11,904 INFO L125 PetriNetUnfolderBase]: For 200548/200558 co-relation queries the response was YES. [2024-06-14 12:28:11,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3389 events. 2127/3389 cut-off events. For 200548/200558 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18706 event pairs, 595 based on Foata normal form. 9/3396 useless extension candidates. Maximal degree in co-relation 26111. Up to 3165 conditions per place. [2024-06-14 12:28:11,934 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 40 changer transitions 0/216 dead transitions. [2024-06-14 12:28:11,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2627 flow [2024-06-14 12:28:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:28:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:28:11,936 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2089 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:28:11,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2627 flow [2024-06-14 12:28:12,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 216 transitions, 2467 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:12,150 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2015 flow [2024-06-14 12:28:12,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2015, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-14 12:28:12,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 12:28:12,151 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2015 flow [2024-06-14 12:28:12,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:12,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:12,151 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 12:28:12,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:28:12,151 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 12:28:12,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash -645281935, now seen corresponding path program 5 times [2024-06-14 12:28:12,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:12,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995227480] [2024-06-14 12:28:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:12,959 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 12:28:12,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:12,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995227480] [2024-06-14 12:28:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995227480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:12,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072783923] [2024-06-14 12:28:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:13,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:13,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2015 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:13,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:13,646 INFO L124 PetriNetUnfolderBase]: 2146/3422 cut-off events. [2024-06-14 12:28:13,646 INFO L125 PetriNetUnfolderBase]: For 209092/209094 co-relation queries the response was YES. [2024-06-14 12:28:13,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26546 conditions, 3422 events. 2146/3422 cut-off events. For 209092/209094 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18970 event pairs, 602 based on Foata normal form. 5/3423 useless extension candidates. Maximal degree in co-relation 26465. Up to 2821 conditions per place. [2024-06-14 12:28:13,674 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 143 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-14 12:28:13,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 228 transitions, 2961 flow [2024-06-14 12:28:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:28:13,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:28:13,675 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2015 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:28:13,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 228 transitions, 2961 flow [2024-06-14 12:28:13,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 228 transitions, 2880 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:13,864 INFO L231 Difference]: Finished difference. Result has 175 places, 209 transitions, 2242 flow [2024-06-14 12:28:13,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2242, PETRI_PLACES=175, PETRI_TRANSITIONS=209} [2024-06-14 12:28:13,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-14 12:28:13,865 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 209 transitions, 2242 flow [2024-06-14 12:28:13,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:13,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:13,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:28:13,865 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 12:28:13,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash -50763931, now seen corresponding path program 6 times [2024-06-14 12:28:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572609314] [2024-06-14 12:28:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:13,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:14,689 INFO 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 12:28:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572609314] [2024-06-14 12:28:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572609314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651111950] [2024-06-14 12:28:14,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:14,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:14,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 209 transitions, 2242 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:14,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:14,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:14,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:15,380 INFO L124 PetriNetUnfolderBase]: 2153/3432 cut-off events. [2024-06-14 12:28:15,380 INFO L125 PetriNetUnfolderBase]: For 219897/219899 co-relation queries the response was YES. [2024-06-14 12:28:15,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 3432 events. 2153/3432 cut-off events. For 219897/219899 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18976 event pairs, 605 based on Foata normal form. 5/3433 useless extension candidates. Maximal degree in co-relation 27161. Up to 2829 conditions per place. [2024-06-14 12:28:15,410 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 137 selfloop transitions, 88 changer transitions 0/230 dead transitions. [2024-06-14 12:28:15,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 3039 flow [2024-06-14 12:28:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:28:15,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:28:15,411 INFO L175 Difference]: Start difference. First operand has 175 places, 209 transitions, 2242 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:28:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 3039 flow [2024-06-14 12:28:15,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 230 transitions, 2709 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:15,621 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2198 flow [2024-06-14 12:28:15,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2198, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-14 12:28:15,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-14 12:28:15,621 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2198 flow [2024-06-14 12:28:15,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:15,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:15,622 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 12:28:15,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:28:15,622 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 12:28:15,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2068110638, now seen corresponding path program 4 times [2024-06-14 12:28:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958443289] [2024-06-14 12:28:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:16,477 INFO 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 12:28:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958443289] [2024-06-14 12:28:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958443289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:16,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:16,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622255403] [2024-06-14 12:28:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:16,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:16,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:16,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2198 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:16,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:16,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:16,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:17,152 INFO L124 PetriNetUnfolderBase]: 2150/3430 cut-off events. [2024-06-14 12:28:17,153 INFO L125 PetriNetUnfolderBase]: For 224378/224388 co-relation queries the response was YES. [2024-06-14 12:28:17,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27007 conditions, 3430 events. 2150/3430 cut-off events. For 224378/224388 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19008 event pairs, 598 based on Foata normal form. 9/3437 useless extension candidates. Maximal degree in co-relation 26924. Up to 3199 conditions per place. [2024-06-14 12:28:17,184 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 182 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-06-14 12:28:17,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2672 flow [2024-06-14 12:28:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:28:17,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:28:17,185 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2198 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:28:17,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2672 flow [2024-06-14 12:28:17,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 2416 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:17,453 INFO L231 Difference]: Finished difference. Result has 179 places, 214 transitions, 2032 flow [2024-06-14 12:28:17,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2032, PETRI_PLACES=179, PETRI_TRANSITIONS=214} [2024-06-14 12:28:17,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 12:28:17,453 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 214 transitions, 2032 flow [2024-06-14 12:28:17,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:17,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:17,454 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 12:28:17,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:28:17,454 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:17,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash 873995819, now seen corresponding path program 1 times [2024-06-14 12:28:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:17,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039541791] [2024-06-14 12:28:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:18,502 INFO 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 12:28:18,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039541791] [2024-06-14 12:28:18,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039541791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:18,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:18,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:18,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160923869] [2024-06-14 12:28:18,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:18,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:18,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:18,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:18,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 214 transitions, 2032 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:18,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:18,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:18,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:19,331 INFO L124 PetriNetUnfolderBase]: 2043/3320 cut-off events. [2024-06-14 12:28:19,331 INFO L125 PetriNetUnfolderBase]: For 233437/233437 co-relation queries the response was YES. [2024-06-14 12:28:19,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26057 conditions, 3320 events. 2043/3320 cut-off events. For 233437/233437 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18787 event pairs, 548 based on Foata normal form. 1/3320 useless extension candidates. Maximal degree in co-relation 25973. Up to 3039 conditions per place. [2024-06-14 12:28:19,360 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-14 12:28:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 234 transitions, 2582 flow [2024-06-14 12:28:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:28:19,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:28:19,361 INFO L175 Difference]: Start difference. First operand has 179 places, 214 transitions, 2032 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:28:19,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 234 transitions, 2582 flow [2024-06-14 12:28:19,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 234 transitions, 2518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:19,613 INFO L231 Difference]: Finished difference. Result has 182 places, 217 transitions, 2076 flow [2024-06-14 12:28:19,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=182, PETRI_TRANSITIONS=217} [2024-06-14 12:28:19,614 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:28:19,614 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 217 transitions, 2076 flow [2024-06-14 12:28:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:19,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:19,614 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 12:28:19,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:28:19,615 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 12:28:19,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1525590926, now seen corresponding path program 1 times [2024-06-14 12:28:19,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:19,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241264767] [2024-06-14 12:28:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:19,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:20,425 INFO 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 12:28:20,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241264767] [2024-06-14 12:28:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241264767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:20,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:20,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533130362] [2024-06-14 12:28:20,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:20,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:20,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:20,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:20,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:20,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 217 transitions, 2076 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:20,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:20,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:20,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:21,131 INFO L124 PetriNetUnfolderBase]: 2053/3342 cut-off events. [2024-06-14 12:28:21,131 INFO L125 PetriNetUnfolderBase]: For 246821/246821 co-relation queries the response was YES. [2024-06-14 12:28:21,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26583 conditions, 3342 events. 2053/3342 cut-off events. For 246821/246821 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19023 event pairs, 541 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 26498. Up to 3046 conditions per place. [2024-06-14 12:28:21,158 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 17 changer transitions 0/237 dead transitions. [2024-06-14 12:28:21,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 2640 flow [2024-06-14 12:28:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:28:21,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:28:21,160 INFO L175 Difference]: Start difference. First operand has 182 places, 217 transitions, 2076 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:28:21,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 2640 flow [2024-06-14 12:28:21,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2554 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:21,477 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2090 flow [2024-06-14 12:28:21,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2090, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-14 12:28:21,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:28:21,478 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2090 flow [2024-06-14 12:28:21,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:21,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:21,478 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 12:28:21,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:28:21,478 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 12:28:21,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash -639561660, now seen corresponding path program 2 times [2024-06-14 12:28:21,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:21,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442359401] [2024-06-14 12:28:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:22,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:22,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442359401] [2024-06-14 12:28:22,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442359401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:22,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:22,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:22,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101516390] [2024-06-14 12:28:22,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:22,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:22,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:22,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:22,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:22,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2090 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:22,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:22,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:22,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:23,010 INFO L124 PetriNetUnfolderBase]: 2082/3394 cut-off events. [2024-06-14 12:28:23,011 INFO L125 PetriNetUnfolderBase]: For 259944/259946 co-relation queries the response was YES. [2024-06-14 12:28:23,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27472 conditions, 3394 events. 2082/3394 cut-off events. For 259944/259946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19462 event pairs, 546 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27386. Up to 3025 conditions per place. [2024-06-14 12:28:23,110 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-14 12:28:23,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 2832 flow [2024-06-14 12:28:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:28:23,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:28:23,111 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2090 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:28:23,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 2832 flow [2024-06-14 12:28:23,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 242 transitions, 2754 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:23,386 INFO L231 Difference]: Finished difference. Result has 186 places, 226 transitions, 2218 flow [2024-06-14 12:28:23,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2218, PETRI_PLACES=186, PETRI_TRANSITIONS=226} [2024-06-14 12:28:23,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:28:23,387 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 226 transitions, 2218 flow [2024-06-14 12:28:23,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:23,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:23,387 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 12:28:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:28:23,388 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 12:28:23,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash -631943100, now seen corresponding path program 3 times [2024-06-14 12:28:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:23,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661468611] [2024-06-14 12:28:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:24,191 INFO 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 12:28:24,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:24,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661468611] [2024-06-14 12:28:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661468611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:24,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:24,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:24,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137611250] [2024-06-14 12:28:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:24,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 226 transitions, 2218 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:24,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:24,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:24,844 INFO L124 PetriNetUnfolderBase]: 2092/3410 cut-off events. [2024-06-14 12:28:24,844 INFO L125 PetriNetUnfolderBase]: For 271266/271268 co-relation queries the response was YES. [2024-06-14 12:28:24,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28059 conditions, 3410 events. 2092/3410 cut-off events. For 271266/271268 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19579 event pairs, 542 based on Foata normal form. 6/3415 useless extension candidates. Maximal degree in co-relation 27972. Up to 3035 conditions per place. [2024-06-14 12:28:24,875 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2024-06-14 12:28:24,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 245 transitions, 2914 flow [2024-06-14 12:28:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:28:24,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:28:24,877 INFO L175 Difference]: Start difference. First operand has 186 places, 226 transitions, 2218 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:28:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 245 transitions, 2914 flow [2024-06-14 12:28:25,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 245 transitions, 2822 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:25,173 INFO L231 Difference]: Finished difference. Result has 190 places, 229 transitions, 2285 flow [2024-06-14 12:28:25,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=190, PETRI_TRANSITIONS=229} [2024-06-14 12:28:25,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 12:28:25,174 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 229 transitions, 2285 flow [2024-06-14 12:28:25,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:25,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:25,175 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 12:28:25,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:28:25,175 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 12:28:25,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2081182160, now seen corresponding path program 4 times [2024-06-14 12:28:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:25,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376849887] [2024-06-14 12:28:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:26,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:26,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376849887] [2024-06-14 12:28:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376849887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:26,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306324300] [2024-06-14 12:28:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:26,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:26,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:26,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 229 transitions, 2285 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:26,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:26,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:26,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:26,813 INFO L124 PetriNetUnfolderBase]: 2080/3394 cut-off events. [2024-06-14 12:28:26,813 INFO L125 PetriNetUnfolderBase]: For 274137/274139 co-relation queries the response was YES. [2024-06-14 12:28:26,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27939 conditions, 3394 events. 2080/3394 cut-off events. For 274137/274139 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19456 event pairs, 540 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27850. Up to 3027 conditions per place. [2024-06-14 12:28:26,847 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-14 12:28:26,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2809 flow [2024-06-14 12:28:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:28:26,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:28:26,849 INFO L175 Difference]: Start difference. First operand has 190 places, 229 transitions, 2285 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:28:26,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2809 flow [2024-06-14 12:28:27,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 2646 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:27,151 INFO L231 Difference]: Finished difference. Result has 193 places, 229 transitions, 2210 flow [2024-06-14 12:28:27,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=229} [2024-06-14 12:28:27,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:28:27,152 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 229 transitions, 2210 flow [2024-06-14 12:28:27,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:27,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:27,152 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 12:28:27,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:28:27,152 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 12:28:27,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -631933180, now seen corresponding path program 1 times [2024-06-14 12:28:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:27,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425244960] [2024-06-14 12:28:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:28,386 INFO 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 12:28:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425244960] [2024-06-14 12:28:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425244960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590607396] [2024-06-14 12:28:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:28,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:28,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 229 transitions, 2210 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:28,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:28,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:28,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:29,129 INFO L124 PetriNetUnfolderBase]: 2208/3514 cut-off events. [2024-06-14 12:28:29,129 INFO L125 PetriNetUnfolderBase]: For 276974/276974 co-relation queries the response was YES. [2024-06-14 12:28:29,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3514 events. 2208/3514 cut-off events. For 276974/276974 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19572 event pairs, 599 based on Foata normal form. 1/3514 useless extension candidates. Maximal degree in co-relation 28525. Up to 3317 conditions per place. [2024-06-14 12:28:29,161 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-06-14 12:28:29,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 243 transitions, 2790 flow [2024-06-14 12:28:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:28:29,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:28:29,163 INFO L175 Difference]: Start difference. First operand has 193 places, 229 transitions, 2210 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:28:29,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 243 transitions, 2790 flow [2024-06-14 12:28:29,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 243 transitions, 2679 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:28:29,480 INFO L231 Difference]: Finished difference. Result has 193 places, 232 transitions, 2229 flow [2024-06-14 12:28:29,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=193, PETRI_TRANSITIONS=232} [2024-06-14 12:28:29,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:28:29,481 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 232 transitions, 2229 flow [2024-06-14 12:28:29,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:29,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:29,481 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 12:28:29,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:28:29,481 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1753271324, now seen corresponding path program 1 times [2024-06-14 12:28:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863135019] [2024-06-14 12:28:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:30,357 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 12:28:30,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:30,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863135019] [2024-06-14 12:28:30,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863135019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:30,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722008216] [2024-06-14 12:28:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:30,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 232 transitions, 2229 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:30,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:30,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:30,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:31,230 INFO L124 PetriNetUnfolderBase]: 2174/3505 cut-off events. [2024-06-14 12:28:31,230 INFO L125 PetriNetUnfolderBase]: For 298490/298492 co-relation queries the response was YES. [2024-06-14 12:28:31,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28956 conditions, 3505 events. 2174/3505 cut-off events. For 298490/298492 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19828 event pairs, 442 based on Foata normal form. 12/3512 useless extension candidates. Maximal degree in co-relation 28865. Up to 3000 conditions per place. [2024-06-14 12:28:31,266 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-14 12:28:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2907 flow [2024-06-14 12:28:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 12:28:31,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:28:31,267 INFO L175 Difference]: Start difference. First operand has 193 places, 232 transitions, 2229 flow. Second operand 8 states and 164 transitions. [2024-06-14 12:28:31,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2907 flow [2024-06-14 12:28:31,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 2739 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-14 12:28:31,548 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 2210 flow [2024-06-14 12:28:31,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-14 12:28:31,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:28:31,549 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 2210 flow [2024-06-14 12:28:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:31,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:31,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:28:31,550 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:31,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash -337339762, now seen corresponding path program 2 times [2024-06-14 12:28:31,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:31,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284926032] [2024-06-14 12:28:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:32,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:32,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284926032] [2024-06-14 12:28:32,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284926032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:32,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:32,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585707942] [2024-06-14 12:28:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:32,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:32,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:32,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:32,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:32,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:32,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:32,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:33,295 INFO L124 PetriNetUnfolderBase]: 2216/3571 cut-off events. [2024-06-14 12:28:33,295 INFO L125 PetriNetUnfolderBase]: For 314197/314199 co-relation queries the response was YES. [2024-06-14 12:28:33,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30011 conditions, 3571 events. 2216/3571 cut-off events. For 314197/314199 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20281 event pairs, 583 based on Foata normal form. 14/3580 useless extension candidates. Maximal degree in co-relation 29919. Up to 3099 conditions per place. [2024-06-14 12:28:33,332 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 26 changer transitions 0/267 dead transitions. [2024-06-14 12:28:33,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2890 flow [2024-06-14 12:28:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:28:33,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 12:28:33,333 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 2210 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:28:33,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2890 flow [2024-06-14 12:28:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 267 transitions, 2789 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:33,626 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 2241 flow [2024-06-14 12:28:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2241, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2024-06-14 12:28:33,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 12:28:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 2241 flow [2024-06-14 12:28:33,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:33,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:33,627 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 12:28:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:28:33,628 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:33,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1744689532, now seen corresponding path program 1 times [2024-06-14 12:28:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461757861] [2024-06-14 12:28:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:34,488 INFO 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 12:28:34,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461757861] [2024-06-14 12:28:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461757861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:34,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564558352] [2024-06-14 12:28:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:34,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:34,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:34,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 2241 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:34,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:34,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:34,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:35,326 INFO L124 PetriNetUnfolderBase]: 2303/3668 cut-off events. [2024-06-14 12:28:35,326 INFO L125 PetriNetUnfolderBase]: For 309982/309984 co-relation queries the response was YES. [2024-06-14 12:28:35,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 3668 events. 2303/3668 cut-off events. For 309982/309984 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20560 event pairs, 614 based on Foata normal form. 5/3672 useless extension candidates. Maximal degree in co-relation 30628. Up to 3366 conditions per place. [2024-06-14 12:28:35,364 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 232 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-14 12:28:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 269 transitions, 2957 flow [2024-06-14 12:28:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:28:35,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:28:35,366 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 2241 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:28:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 269 transitions, 2957 flow [2024-06-14 12:28:35,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 269 transitions, 2857 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:35,651 INFO L231 Difference]: Finished difference. Result has 199 places, 242 transitions, 2318 flow [2024-06-14 12:28:35,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2318, PETRI_PLACES=199, PETRI_TRANSITIONS=242} [2024-06-14 12:28:35,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-14 12:28:35,652 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 242 transitions, 2318 flow [2024-06-14 12:28:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:35,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:35,652 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 12:28:35,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:28:35,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:35,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1457813114, now seen corresponding path program 3 times [2024-06-14 12:28:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:35,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587521253] [2024-06-14 12:28:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:36,508 INFO 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 12:28:36,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587521253] [2024-06-14 12:28:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587521253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:36,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:36,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:36,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510144191] [2024-06-14 12:28:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:36,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:36,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 242 transitions, 2318 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:36,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:36,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:37,306 INFO L124 PetriNetUnfolderBase]: 2281/3676 cut-off events. [2024-06-14 12:28:37,306 INFO L125 PetriNetUnfolderBase]: For 342496/342518 co-relation queries the response was YES. [2024-06-14 12:28:37,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31596 conditions, 3676 events. 2281/3676 cut-off events. For 342496/342518 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21072 event pairs, 580 based on Foata normal form. 18/3675 useless extension candidates. Maximal degree in co-relation 31502. Up to 3144 conditions per place. [2024-06-14 12:28:37,339 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 38 changer transitions 0/268 dead transitions. [2024-06-14 12:28:37,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 268 transitions, 3004 flow [2024-06-14 12:28:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:28:37,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:28:37,340 INFO L175 Difference]: Start difference. First operand has 199 places, 242 transitions, 2318 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:28:37,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 268 transitions, 3004 flow [2024-06-14 12:28:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 2855 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:37,663 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2331 flow [2024-06-14 12:28:37,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-14 12:28:37,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 12:28:37,664 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2331 flow [2024-06-14 12:28:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:28:37,664 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:37,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1634941472, now seen corresponding path program 1 times [2024-06-14 12:28:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911662001] [2024-06-14 12:28:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:38,643 INFO 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 12:28:38,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:38,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911662001] [2024-06-14 12:28:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911662001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:38,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:38,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676972755] [2024-06-14 12:28:38,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:38,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:38,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2331 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:38,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:38,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:38,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:39,514 INFO L124 PetriNetUnfolderBase]: 2282/3668 cut-off events. [2024-06-14 12:28:39,514 INFO L125 PetriNetUnfolderBase]: For 333994/333996 co-relation queries the response was YES. [2024-06-14 12:28:39,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31801 conditions, 3668 events. 2282/3668 cut-off events. For 333994/333996 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20897 event pairs, 598 based on Foata normal form. 2/3664 useless extension candidates. Maximal degree in co-relation 31706. Up to 3175 conditions per place. [2024-06-14 12:28:39,547 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 37 changer transitions 0/271 dead transitions. [2024-06-14 12:28:39,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 271 transitions, 2989 flow [2024-06-14 12:28:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:28:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-14 12:28:39,548 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2331 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:28:39,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 271 transitions, 2989 flow [2024-06-14 12:28:39,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 271 transitions, 2861 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:39,882 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 2396 flow [2024-06-14 12:28:39,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-14 12:28:39,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 12:28:39,883 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 2396 flow [2024-06-14 12:28:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:39,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:39,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:28:39,883 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:39,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1634821316, now seen corresponding path program 1 times [2024-06-14 12:28:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:39,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058729669] [2024-06-14 12:28:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:40,643 INFO 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 12:28:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058729669] [2024-06-14 12:28:40,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058729669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:40,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:40,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:40,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010667518] [2024-06-14 12:28:40,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:40,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:40,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:40,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:40,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 2396 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:40,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:40,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:40,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:41,480 INFO L124 PetriNetUnfolderBase]: 2377/3778 cut-off events. [2024-06-14 12:28:41,480 INFO L125 PetriNetUnfolderBase]: For 347329/347331 co-relation queries the response was YES. [2024-06-14 12:28:41,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32848 conditions, 3778 events. 2377/3778 cut-off events. For 347329/347331 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21246 event pairs, 618 based on Foata normal form. 6/3783 useless extension candidates. Maximal degree in co-relation 32752. Up to 3479 conditions per place. [2024-06-14 12:28:41,512 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-14 12:28:41,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 274 transitions, 3075 flow [2024-06-14 12:28:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:28:41,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:28:41,513 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 2396 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:28:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 274 transitions, 3075 flow [2024-06-14 12:28:41,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 274 transitions, 2893 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:41,830 INFO L231 Difference]: Finished difference. Result has 203 places, 252 transitions, 2354 flow [2024-06-14 12:28:41,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=203, PETRI_TRANSITIONS=252} [2024-06-14 12:28:41,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 12:28:41,831 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 252 transitions, 2354 flow [2024-06-14 12:28:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:41,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:41,832 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 12:28:41,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:28:41,832 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 12:28:41,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -50329114, now seen corresponding path program 2 times [2024-06-14 12:28:41,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:41,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871308823] [2024-06-14 12:28:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:41,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:42,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:42,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871308823] [2024-06-14 12:28:42,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871308823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:42,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:42,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452510484] [2024-06-14 12:28:42,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:42,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:42,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:42,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:42,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 252 transitions, 2354 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:42,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:42,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:42,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:43,433 INFO L124 PetriNetUnfolderBase]: 2413/3842 cut-off events. [2024-06-14 12:28:43,433 INFO L125 PetriNetUnfolderBase]: For 362762/362764 co-relation queries the response was YES. [2024-06-14 12:28:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33460 conditions, 3842 events. 2413/3842 cut-off events. For 362762/362764 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21730 event pairs, 620 based on Foata normal form. 6/3847 useless extension candidates. Maximal degree in co-relation 33363. Up to 3376 conditions per place. [2024-06-14 12:28:43,475 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 57 changer transitions 0/281 dead transitions. [2024-06-14 12:28:43,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3368 flow [2024-06-14 12:28:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:28:43,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:28:43,477 INFO L175 Difference]: Start difference. First operand has 203 places, 252 transitions, 2354 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:28:43,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3368 flow [2024-06-14 12:28:43,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 3273 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:43,833 INFO L231 Difference]: Finished difference. Result has 205 places, 259 transitions, 2528 flow [2024-06-14 12:28:43,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2528, PETRI_PLACES=205, PETRI_TRANSITIONS=259} [2024-06-14 12:28:43,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 12:28:43,834 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 259 transitions, 2528 flow [2024-06-14 12:28:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:43,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:43,834 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 12:28:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:28:43,835 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 12:28:43,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -50091964, now seen corresponding path program 3 times [2024-06-14 12:28:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403642050] [2024-06-14 12:28:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:44,656 INFO 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 12:28:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403642050] [2024-06-14 12:28:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403642050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257746754] [2024-06-14 12:28:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:44,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:44,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 259 transitions, 2528 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:44,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:44,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:44,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:45,452 INFO L124 PetriNetUnfolderBase]: 2401/3820 cut-off events. [2024-06-14 12:28:45,453 INFO L125 PetriNetUnfolderBase]: For 365723/365725 co-relation queries the response was YES. [2024-06-14 12:28:45,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33295 conditions, 3820 events. 2401/3820 cut-off events. For 365723/365725 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21565 event pairs, 605 based on Foata normal form. 6/3825 useless extension candidates. Maximal degree in co-relation 33197. Up to 3368 conditions per place. [2024-06-14 12:28:45,499 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-14 12:28:45,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 280 transitions, 3274 flow [2024-06-14 12:28:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:28:45,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:28:45,501 INFO L175 Difference]: Start difference. First operand has 205 places, 259 transitions, 2528 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:28:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 280 transitions, 3274 flow [2024-06-14 12:28:46,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 280 transitions, 3108 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:46,015 INFO L231 Difference]: Finished difference. Result has 209 places, 259 transitions, 2486 flow [2024-06-14 12:28:46,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=209, PETRI_TRANSITIONS=259} [2024-06-14 12:28:46,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 12:28:46,016 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 259 transitions, 2486 flow [2024-06-14 12:28:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:46,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:46,016 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 12:28:46,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:28:46,017 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 12:28:46,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1457802202, now seen corresponding path program 2 times [2024-06-14 12:28:46,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389385865] [2024-06-14 12:28:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:46,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:46,993 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 12:28:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389385865] [2024-06-14 12:28:46,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389385865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452076930] [2024-06-14 12:28:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:47,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 259 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:47,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:47,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:47,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:47,839 INFO L124 PetriNetUnfolderBase]: 2472/3924 cut-off events. [2024-06-14 12:28:47,840 INFO L125 PetriNetUnfolderBase]: For 389114/389116 co-relation queries the response was YES. [2024-06-14 12:28:47,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34591 conditions, 3924 events. 2472/3924 cut-off events. For 389114/389116 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22167 event pairs, 624 based on Foata normal form. 5/3928 useless extension candidates. Maximal degree in co-relation 34492. Up to 3363 conditions per place. [2024-06-14 12:28:47,883 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 69 changer transitions 0/295 dead transitions. [2024-06-14 12:28:47,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 3720 flow [2024-06-14 12:28:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:28:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:28:47,884 INFO L175 Difference]: Start difference. First operand has 209 places, 259 transitions, 2486 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:28:47,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 3720 flow [2024-06-14 12:28:48,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 295 transitions, 3628 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:48,291 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 2910 flow [2024-06-14 12:28:48,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-14 12:28:48,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 12:28:48,292 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 2910 flow [2024-06-14 12:28:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:48,292 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 12:28:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:28:48,293 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 12:28:48,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash -50083470, now seen corresponding path program 3 times [2024-06-14 12:28:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865820905] [2024-06-14 12:28:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:49,207 INFO 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 12:28:49,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:49,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865820905] [2024-06-14 12:28:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865820905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744187990] [2024-06-14 12:28:49,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:49,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:49,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:49,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:49,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:49,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:49,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:50,080 INFO L124 PetriNetUnfolderBase]: 2491/3953 cut-off events. [2024-06-14 12:28:50,080 INFO L125 PetriNetUnfolderBase]: For 406788/406790 co-relation queries the response was YES. [2024-06-14 12:28:50,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35835 conditions, 3953 events. 2491/3953 cut-off events. For 406788/406790 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22314 event pairs, 605 based on Foata normal form. 5/3957 useless extension candidates. Maximal degree in co-relation 35734. Up to 3382 conditions per place. [2024-06-14 12:28:50,120 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 71 changer transitions 0/299 dead transitions. [2024-06-14 12:28:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 299 transitions, 3959 flow [2024-06-14 12:28:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:28:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:28:50,122 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 2910 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:28:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 299 transitions, 3959 flow [2024-06-14 12:28:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 299 transitions, 3785 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-14 12:28:50,548 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3009 flow [2024-06-14 12:28:50,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3009, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-14 12:28:50,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 12:28:50,548 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3009 flow [2024-06-14 12:28:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:50,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:50,549 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 12:28:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:28:50,549 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 12:28:50,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash -50083036, now seen corresponding path program 1 times [2024-06-14 12:28:50,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:50,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942811138] [2024-06-14 12:28:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:51,437 INFO 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 12:28:51,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:51,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942811138] [2024-06-14 12:28:51,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942811138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:51,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:51,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:51,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218714325] [2024-06-14 12:28:51,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:51,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:51,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:51,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3009 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:51,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:51,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:51,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:52,290 INFO L124 PetriNetUnfolderBase]: 2496/3951 cut-off events. [2024-06-14 12:28:52,290 INFO L125 PetriNetUnfolderBase]: For 412291/412291 co-relation queries the response was YES. [2024-06-14 12:28:52,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36123 conditions, 3951 events. 2496/3951 cut-off events. For 412291/412291 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22245 event pairs, 640 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 36020. Up to 3726 conditions per place. [2024-06-14 12:28:52,331 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 20 changer transitions 0/296 dead transitions. [2024-06-14 12:28:52,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 3739 flow [2024-06-14 12:28:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:28:52,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:28:52,332 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3009 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:28:52,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 3739 flow [2024-06-14 12:28:52,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 296 transitions, 3494 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:52,822 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 2920 flow [2024-06-14 12:28:52,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-14 12:28:52,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 12:28:52,823 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 2920 flow [2024-06-14 12:28:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:52,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:52,823 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 12:28:52,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:28:52,824 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 12:28:52,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1528974524, now seen corresponding path program 4 times [2024-06-14 12:28:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094274210] [2024-06-14 12:28:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:52,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:53,810 INFO 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 12:28:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:53,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094274210] [2024-06-14 12:28:53,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094274210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:53,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:53,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:53,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795118355] [2024-06-14 12:28:53,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:53,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:53,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:53,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:53,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:53,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 2920 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:53,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:53,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:53,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:54,690 INFO L124 PetriNetUnfolderBase]: 2491/3954 cut-off events. [2024-06-14 12:28:54,690 INFO L125 PetriNetUnfolderBase]: For 413512/413514 co-relation queries the response was YES. [2024-06-14 12:28:54,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35784 conditions, 3954 events. 2491/3954 cut-off events. For 413512/413514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22312 event pairs, 604 based on Foata normal form. 5/3958 useless extension candidates. Maximal degree in co-relation 35681. Up to 3387 conditions per place. [2024-06-14 12:28:54,729 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 71 changer transitions 0/301 dead transitions. [2024-06-14 12:28:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 301 transitions, 3728 flow [2024-06-14 12:28:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:28:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:28:54,731 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 2920 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:28:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 301 transitions, 3728 flow [2024-06-14 12:28:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 301 transitions, 3516 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:55,368 INFO L231 Difference]: Finished difference. Result has 222 places, 278 transitions, 2857 flow [2024-06-14 12:28:55,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2857, PETRI_PLACES=222, PETRI_TRANSITIONS=278} [2024-06-14 12:28:55,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:28:55,369 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 278 transitions, 2857 flow [2024-06-14 12:28:55,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:55,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:28:55,369 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 12:28:55,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1470740592, now seen corresponding path program 4 times [2024-06-14 12:28:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048339702] [2024-06-14 12:28:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:55,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:56,222 INFO 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 12:28:56,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048339702] [2024-06-14 12:28:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048339702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363222760] [2024-06-14 12:28:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:56,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:56,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:56,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 278 transitions, 2857 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:56,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:56,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:56,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:57,067 INFO L124 PetriNetUnfolderBase]: 2415/3913 cut-off events. [2024-06-14 12:28:57,067 INFO L125 PetriNetUnfolderBase]: For 443412/443422 co-relation queries the response was YES. [2024-06-14 12:28:57,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35656 conditions, 3913 events. 2415/3913 cut-off events. For 443412/443422 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22917 event pairs, 604 based on Foata normal form. 22/3901 useless extension candidates. Maximal degree in co-relation 35552. Up to 3279 conditions per place. [2024-06-14 12:28:57,110 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-06-14 12:28:57,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 299 transitions, 3611 flow [2024-06-14 12:28:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:28:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:28:57,111 INFO L175 Difference]: Start difference. First operand has 222 places, 278 transitions, 2857 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:28:57,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 299 transitions, 3611 flow [2024-06-14 12:28:57,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 3479 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:57,706 INFO L231 Difference]: Finished difference. Result has 223 places, 280 transitions, 2931 flow [2024-06-14 12:28:57,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2931, PETRI_PLACES=223, PETRI_TRANSITIONS=280} [2024-06-14 12:28:57,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 12:28:57,707 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 280 transitions, 2931 flow [2024-06-14 12:28:57,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:57,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:57,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:57,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:28:57,707 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 12:28:57,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1102031348, now seen corresponding path program 2 times [2024-06-14 12:28:57,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:57,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278136032] [2024-06-14 12:28:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:57,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:58,813 INFO 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 12:28:58,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:58,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278136032] [2024-06-14 12:28:58,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278136032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:58,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:58,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812333242] [2024-06-14 12:28:58,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:58,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:58,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:58,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:58,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 280 transitions, 2931 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:28:58,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:58,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:59,760 INFO L124 PetriNetUnfolderBase]: 2429/3891 cut-off events. [2024-06-14 12:28:59,760 INFO L125 PetriNetUnfolderBase]: For 431592/431592 co-relation queries the response was YES. [2024-06-14 12:28:59,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36066 conditions, 3891 events. 2429/3891 cut-off events. For 431592/431592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22331 event pairs, 631 based on Foata normal form. 1/3884 useless extension candidates. Maximal degree in co-relation 35961. Up to 3385 conditions per place. [2024-06-14 12:28:59,806 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-14 12:28:59,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 303 transitions, 3637 flow [2024-06-14 12:28:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:28:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:28:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:28:59,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:28:59,808 INFO L175 Difference]: Start difference. First operand has 223 places, 280 transitions, 2931 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:28:59,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 303 transitions, 3637 flow [2024-06-14 12:29:00,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 303 transitions, 3469 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:00,419 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 2955 flow [2024-06-14 12:29:00,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2955, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-14 12:29:00,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 12:29:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 2955 flow [2024-06-14 12:29:00,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:29:00,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:00,420 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 12:29:00,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:29:00,420 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 12:29:00,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -61821500, now seen corresponding path program 4 times [2024-06-14 12:29:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:00,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685590308] [2024-06-14 12:29:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:01,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685590308] [2024-06-14 12:29:01,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685590308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:01,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062056606] [2024-06-14 12:29:01,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:01,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:01,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 2955 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:01,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:01,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:01,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:02,105 INFO L124 PetriNetUnfolderBase]: 2513/3975 cut-off events. [2024-06-14 12:29:02,105 INFO L125 PetriNetUnfolderBase]: For 437409/437409 co-relation queries the response was YES. [2024-06-14 12:29:02,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36471 conditions, 3975 events. 2513/3975 cut-off events. For 437409/437409 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22370 event pairs, 660 based on Foata normal form. 2/3973 useless extension candidates. Maximal degree in co-relation 36365. Up to 3689 conditions per place. [2024-06-14 12:29:02,149 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 26 changer transitions 0/302 dead transitions. [2024-06-14 12:29:02,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 302 transitions, 3611 flow [2024-06-14 12:29:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:29:02,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:29:02,150 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 2955 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:29:02,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 302 transitions, 3611 flow [2024-06-14 12:29:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 302 transitions, 3411 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:02,942 INFO L231 Difference]: Finished difference. Result has 227 places, 283 transitions, 2813 flow [2024-06-14 12:29:02,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=227, PETRI_TRANSITIONS=283} [2024-06-14 12:29:02,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:29:02,943 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 283 transitions, 2813 flow [2024-06-14 12:29:02,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:02,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:02,943 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 12:29:02,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:29:02,943 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 12:29:02,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -78233186, now seen corresponding path program 3 times [2024-06-14 12:29:02,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:02,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131959852] [2024-06-14 12:29:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:03,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131959852] [2024-06-14 12:29:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131959852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:03,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:03,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453668218] [2024-06-14 12:29:03,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:03,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:03,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:04,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 283 transitions, 2813 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:29:04,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:04,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:04,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:04,918 INFO L124 PetriNetUnfolderBase]: 2422/3880 cut-off events. [2024-06-14 12:29:04,919 INFO L125 PetriNetUnfolderBase]: For 447916/447916 co-relation queries the response was YES. [2024-06-14 12:29:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36063 conditions, 3880 events. 2422/3880 cut-off events. For 447916/447916 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22255 event pairs, 630 based on Foata normal form. 1/3873 useless extension candidates. Maximal degree in co-relation 35956. Up to 3378 conditions per place. [2024-06-14 12:29:04,962 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 40 changer transitions 0/306 dead transitions. [2024-06-14 12:29:04,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 3531 flow [2024-06-14 12:29:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:29:04,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:29:04,964 INFO L175 Difference]: Start difference. First operand has 227 places, 283 transitions, 2813 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:29:04,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 3531 flow [2024-06-14 12:29:05,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 306 transitions, 3330 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 12:29:05,513 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 2812 flow [2024-06-14 12:29:05,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2812, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-14 12:29:05,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 12:29:05,514 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 2812 flow [2024-06-14 12:29:05,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:29:05,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:05,514 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 12:29:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:29:05,514 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 12:29:05,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash -66805346, now seen corresponding path program 4 times [2024-06-14 12:29:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:05,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214181994] [2024-06-14 12:29:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:05,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:06,601 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 12:29:06,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:06,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214181994] [2024-06-14 12:29:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214181994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041031018] [2024-06-14 12:29:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:06,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:06,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 2812 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:29:06,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:06,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:06,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:07,526 INFO L124 PetriNetUnfolderBase]: 2419/3876 cut-off events. [2024-06-14 12:29:07,526 INFO L125 PetriNetUnfolderBase]: For 459056/459056 co-relation queries the response was YES. [2024-06-14 12:29:07,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36318 conditions, 3876 events. 2419/3876 cut-off events. For 459056/459056 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22239 event pairs, 630 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 36210. Up to 3359 conditions per place. [2024-06-14 12:29:07,570 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-14 12:29:07,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 306 transitions, 3528 flow [2024-06-14 12:29:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:29:07,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:29:07,571 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 2812 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:29:07,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 306 transitions, 3528 flow [2024-06-14 12:29:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 306 transitions, 3350 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:08,287 INFO L231 Difference]: Finished difference. Result has 227 places, 289 transitions, 2864 flow [2024-06-14 12:29:08,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2864, PETRI_PLACES=227, PETRI_TRANSITIONS=289} [2024-06-14 12:29:08,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:29:08,288 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 289 transitions, 2864 flow [2024-06-14 12:29:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 12:29:08,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:08,288 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 12:29:08,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:29:08,288 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 12:29:08,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash -234977054, now seen corresponding path program 5 times [2024-06-14 12:29:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:08,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026541420] [2024-06-14 12:29:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:09,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:09,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026541420] [2024-06-14 12:29:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026541420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:09,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:09,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:09,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005672029] [2024-06-14 12:29:09,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:09,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:09,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 289 transitions, 2864 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:09,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:09,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:09,978 INFO L124 PetriNetUnfolderBase]: 2541/4032 cut-off events. [2024-06-14 12:29:09,978 INFO L125 PetriNetUnfolderBase]: For 479145/479145 co-relation queries the response was YES. [2024-06-14 12:29:10,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37702 conditions, 4032 events. 2541/4032 cut-off events. For 479145/479145 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22889 event pairs, 633 based on Foata normal form. 2/4030 useless extension candidates. Maximal degree in co-relation 37593. Up to 3659 conditions per place. [2024-06-14 12:29:10,020 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 47 changer transitions 0/313 dead transitions. [2024-06-14 12:29:10,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 313 transitions, 3812 flow [2024-06-14 12:29:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:29:10,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:29:10,021 INFO L175 Difference]: Start difference. First operand has 227 places, 289 transitions, 2864 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:29:10,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 313 transitions, 3812 flow [2024-06-14 12:29:10,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 3604 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:10,717 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 2909 flow [2024-06-14 12:29:10,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-06-14 12:29:10,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 12:29:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 2909 flow [2024-06-14 12:29:10,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:10,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:10,718 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 12:29:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:29:10,718 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 12:29:10,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 48248860, now seen corresponding path program 6 times [2024-06-14 12:29:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:10,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055696383] [2024-06-14 12:29:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:11,508 INFO 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 12:29:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:11,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055696383] [2024-06-14 12:29:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055696383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:11,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:11,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:11,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061582585] [2024-06-14 12:29:11,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:11,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:11,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:11,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 2909 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:11,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:11,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:11,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:12,450 INFO L124 PetriNetUnfolderBase]: 2535/4024 cut-off events. [2024-06-14 12:29:12,450 INFO L125 PetriNetUnfolderBase]: For 484880/484880 co-relation queries the response was YES. [2024-06-14 12:29:12,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37656 conditions, 4024 events. 2535/4024 cut-off events. For 484880/484880 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22816 event pairs, 640 based on Foata normal form. 2/4022 useless extension candidates. Maximal degree in co-relation 37545. Up to 3654 conditions per place. [2024-06-14 12:29:12,492 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 262 selfloop transitions, 45 changer transitions 0/312 dead transitions. [2024-06-14 12:29:12,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 3587 flow [2024-06-14 12:29:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:12,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:29:12,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:29:12,493 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 2909 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:29:12,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 3587 flow [2024-06-14 12:29:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 3432 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:13,185 INFO L231 Difference]: Finished difference. Result has 233 places, 295 transitions, 2850 flow [2024-06-14 12:29:13,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=233, PETRI_TRANSITIONS=295} [2024-06-14 12:29:13,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 12:29:13,186 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 295 transitions, 2850 flow [2024-06-14 12:29:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:13,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:13,186 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 12:29:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:29:13,187 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 12:29:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1641572850, now seen corresponding path program 7 times [2024-06-14 12:29:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177353409] [2024-06-14 12:29:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177353409] [2024-06-14 12:29:13,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177353409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:13,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029957799] [2024-06-14 12:29:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:14,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:14,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 295 transitions, 2850 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:14,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:14,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:14,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:14,839 INFO L124 PetriNetUnfolderBase]: 2555/4074 cut-off events. [2024-06-14 12:29:14,839 INFO L125 PetriNetUnfolderBase]: For 501794/501796 co-relation queries the response was YES. [2024-06-14 12:29:14,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37967 conditions, 4074 events. 2555/4074 cut-off events. For 501794/501796 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23304 event pairs, 634 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 37855. Up to 3366 conditions per place. [2024-06-14 12:29:14,885 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 212 selfloop transitions, 99 changer transitions 0/316 dead transitions. [2024-06-14 12:29:14,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 3913 flow [2024-06-14 12:29:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:29:14,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:29:14,886 INFO L175 Difference]: Start difference. First operand has 233 places, 295 transitions, 2850 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:29:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 3913 flow [2024-06-14 12:29:15,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 316 transitions, 3806 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:15,774 INFO L231 Difference]: Finished difference. Result has 234 places, 299 transitions, 3031 flow [2024-06-14 12:29:15,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3031, PETRI_PLACES=234, PETRI_TRANSITIONS=299} [2024-06-14 12:29:15,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-14 12:29:15,775 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 299 transitions, 3031 flow [2024-06-14 12:29:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:15,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:15,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:15,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:29:15,776 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 12:29:15,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1470863910, now seen corresponding path program 8 times [2024-06-14 12:29:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:15,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593775714] [2024-06-14 12:29:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:16,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593775714] [2024-06-14 12:29:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593775714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:16,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62026045] [2024-06-14 12:29:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:16,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:16,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 299 transitions, 3031 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:16,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:16,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:16,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:17,542 INFO L124 PetriNetUnfolderBase]: 2575/4102 cut-off events. [2024-06-14 12:29:17,542 INFO L125 PetriNetUnfolderBase]: For 516382/516384 co-relation queries the response was YES. [2024-06-14 12:29:17,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38695 conditions, 4102 events. 2575/4102 cut-off events. For 516382/516384 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23509 event pairs, 634 based on Foata normal form. 6/4104 useless extension candidates. Maximal degree in co-relation 38582. Up to 3376 conditions per place. [2024-06-14 12:29:17,590 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 106 changer transitions 0/322 dead transitions. [2024-06-14 12:29:17,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4177 flow [2024-06-14 12:29:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:29:17,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:29:17,591 INFO L175 Difference]: Start difference. First operand has 234 places, 299 transitions, 3031 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:29:17,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4177 flow [2024-06-14 12:29:18,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 322 transitions, 3947 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:18,317 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3189 flow [2024-06-14 12:29:18,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-14 12:29:18,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:29:18,317 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3189 flow [2024-06-14 12:29:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:18,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:18,318 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 12:29:18,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:29:18,318 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 12:29:18,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1648411140, now seen corresponding path program 9 times [2024-06-14 12:29:18,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:18,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129483292] [2024-06-14 12:29:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:19,136 INFO 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 12:29:19,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:19,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129483292] [2024-06-14 12:29:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129483292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:19,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857992537] [2024-06-14 12:29:19,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:19,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:19,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:19,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:19,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:19,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:19,964 INFO L124 PetriNetUnfolderBase]: 2585/4116 cut-off events. [2024-06-14 12:29:19,965 INFO L125 PetriNetUnfolderBase]: For 522023/522025 co-relation queries the response was YES. [2024-06-14 12:29:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39019 conditions, 4116 events. 2585/4116 cut-off events. For 522023/522025 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23599 event pairs, 648 based on Foata normal form. 4/4116 useless extension candidates. Maximal degree in co-relation 38904. Up to 3382 conditions per place. [2024-06-14 12:29:20,017 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 121 changer transitions 0/325 dead transitions. [2024-06-14 12:29:20,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 325 transitions, 4272 flow [2024-06-14 12:29:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:29:20,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:29:20,018 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3189 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:29:20,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 325 transitions, 4272 flow [2024-06-14 12:29:20,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 4063 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:20,740 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3301 flow [2024-06-14 12:29:20,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3301, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-14 12:29:20,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 12:29:20,740 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3301 flow [2024-06-14 12:29:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:20,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:20,741 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 12:29:20,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:29:20,741 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 12:29:20,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1568926856, now seen corresponding path program 10 times [2024-06-14 12:29:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:20,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398774816] [2024-06-14 12:29:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:21,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398774816] [2024-06-14 12:29:21,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398774816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:21,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:21,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:21,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219587219] [2024-06-14 12:29:21,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:21,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:21,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:21,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:21,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3301 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:21,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:21,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:21,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:22,500 INFO L124 PetriNetUnfolderBase]: 2575/4104 cut-off events. [2024-06-14 12:29:22,501 INFO L125 PetriNetUnfolderBase]: For 528995/528997 co-relation queries the response was YES. [2024-06-14 12:29:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4104 events. 2575/4104 cut-off events. For 528995/528997 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23551 event pairs, 652 based on Foata normal form. 4/4104 useless extension candidates. Maximal degree in co-relation 38771. Up to 3374 conditions per place. [2024-06-14 12:29:22,542 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 120 changer transitions 0/325 dead transitions. [2024-06-14 12:29:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 325 transitions, 4315 flow [2024-06-14 12:29:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:29:22,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:29:22,543 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3301 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:29:22,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 325 transitions, 4315 flow [2024-06-14 12:29:23,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 325 transitions, 4018 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:23,296 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 3250 flow [2024-06-14 12:29:23,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3250, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-14 12:29:23,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 12:29:23,297 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 3250 flow [2024-06-14 12:29:23,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:23,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:23,297 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 12:29:23,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:29:23,297 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 12:29:23,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:23,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1876312290, now seen corresponding path program 11 times [2024-06-14 12:29:23,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:23,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706683689] [2024-06-14 12:29:23,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:23,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:24,101 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 12:29:24,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:24,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706683689] [2024-06-14 12:29:24,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706683689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:24,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:24,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:24,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091621073] [2024-06-14 12:29:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:24,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:24,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 3250 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:24,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:24,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:24,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:24,896 INFO L124 PetriNetUnfolderBase]: 2569/4094 cut-off events. [2024-06-14 12:29:24,896 INFO L125 PetriNetUnfolderBase]: For 533484/533486 co-relation queries the response was YES. [2024-06-14 12:29:24,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38639 conditions, 4094 events. 2569/4094 cut-off events. For 533484/533486 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23486 event pairs, 621 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 38523. Up to 3371 conditions per place. [2024-06-14 12:29:24,944 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 201 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2024-06-14 12:29:24,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 4110 flow [2024-06-14 12:29:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:29:24,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:29:24,945 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 3250 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:29:24,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 4110 flow [2024-06-14 12:29:25,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 3660 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-14 12:29:25,783 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3042 flow [2024-06-14 12:29:25,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3042, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-14 12:29:25,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 12:29:25,783 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3042 flow [2024-06-14 12:29:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:25,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:25,784 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 12:29:25,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:29:25,784 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 12:29:25,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1870598370, now seen corresponding path program 12 times [2024-06-14 12:29:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902609684] [2024-06-14 12:29:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:25,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:26,613 INFO 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 12:29:26,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902609684] [2024-06-14 12:29:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902609684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:26,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:26,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649094814] [2024-06-14 12:29:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:26,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:26,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:26,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3042 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:26,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:26,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:26,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:27,402 INFO L124 PetriNetUnfolderBase]: 2553/4068 cut-off events. [2024-06-14 12:29:27,402 INFO L125 PetriNetUnfolderBase]: For 539126/539128 co-relation queries the response was YES. [2024-06-14 12:29:27,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38062 conditions, 4068 events. 2553/4068 cut-off events. For 539126/539128 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23338 event pairs, 618 based on Foata normal form. 6/4070 useless extension candidates. Maximal degree in co-relation 37946. Up to 3358 conditions per place. [2024-06-14 12:29:27,449 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 208 selfloop transitions, 110 changer transitions 0/323 dead transitions. [2024-06-14 12:29:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 3744 flow [2024-06-14 12:29:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:29:27,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:29:27,450 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3042 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:29:27,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 3744 flow [2024-06-14 12:29:28,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 323 transitions, 3431 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:28,264 INFO L231 Difference]: Finished difference. Result has 243 places, 308 transitions, 2957 flow [2024-06-14 12:29:28,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2957, PETRI_PLACES=243, PETRI_TRANSITIONS=308} [2024-06-14 12:29:28,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 12:29:28,265 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 308 transitions, 2957 flow [2024-06-14 12:29:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:28,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:28,265 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 12:29:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:29:28,266 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 12:29:28,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1884416434, now seen corresponding path program 5 times [2024-06-14 12:29:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474524204] [2024-06-14 12:29:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:29,145 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 12:29:29,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474524204] [2024-06-14 12:29:29,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474524204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:29,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:29,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665485289] [2024-06-14 12:29:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:29,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:29,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:29,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:29,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 308 transitions, 2957 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:29,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:29,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:29,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:30,048 INFO L124 PetriNetUnfolderBase]: 2620/4161 cut-off events. [2024-06-14 12:29:30,048 INFO L125 PetriNetUnfolderBase]: For 567363/567365 co-relation queries the response was YES. [2024-06-14 12:29:30,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39564 conditions, 4161 events. 2620/4161 cut-off events. For 567363/567365 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23793 event pairs, 600 based on Foata normal form. 5/4162 useless extension candidates. Maximal degree in co-relation 39447. Up to 3164 conditions per place. [2024-06-14 12:29:30,097 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 199 selfloop transitions, 144 changer transitions 0/348 dead transitions. [2024-06-14 12:29:30,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 4501 flow [2024-06-14 12:29:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:29:30,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:29:30,098 INFO L175 Difference]: Start difference. First operand has 243 places, 308 transitions, 2957 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:29:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 4501 flow [2024-06-14 12:29:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 348 transitions, 4223 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 12:29:30,962 INFO L231 Difference]: Finished difference. Result has 245 places, 327 transitions, 3421 flow [2024-06-14 12:29:30,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3421, PETRI_PLACES=245, PETRI_TRANSITIONS=327} [2024-06-14 12:29:30,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 12:29:30,962 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 327 transitions, 3421 flow [2024-06-14 12:29:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:30,963 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 12:29:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:29:30,963 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 12:29:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1870594774, now seen corresponding path program 6 times [2024-06-14 12:29:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96276992] [2024-06-14 12:29:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:31,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:31,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96276992] [2024-06-14 12:29:31,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96276992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:31,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:31,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:31,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32393740] [2024-06-14 12:29:31,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:31,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:31,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:31,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:31,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 327 transitions, 3421 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:31,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:31,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:31,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:32,777 INFO L124 PetriNetUnfolderBase]: 2691/4270 cut-off events. [2024-06-14 12:29:32,777 INFO L125 PetriNetUnfolderBase]: For 612229/612231 co-relation queries the response was YES. [2024-06-14 12:29:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42369 conditions, 4270 events. 2691/4270 cut-off events. For 612229/612231 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24473 event pairs, 606 based on Foata normal form. 5/4271 useless extension candidates. Maximal degree in co-relation 42249. Up to 3223 conditions per place. [2024-06-14 12:29:32,827 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 213 selfloop transitions, 143 changer transitions 0/361 dead transitions. [2024-06-14 12:29:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 361 transitions, 5216 flow [2024-06-14 12:29:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:29:32,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:29:32,829 INFO L175 Difference]: Start difference. First operand has 245 places, 327 transitions, 3421 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:29:32,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 361 transitions, 5216 flow [2024-06-14 12:29:33,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 361 transitions, 4878 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:33,951 INFO L231 Difference]: Finished difference. Result has 252 places, 339 transitions, 3845 flow [2024-06-14 12:29:33,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=252, PETRI_TRANSITIONS=339} [2024-06-14 12:29:33,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:29:33,951 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 339 transitions, 3845 flow [2024-06-14 12:29:33,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:33,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:33,951 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 12:29:33,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:29:33,952 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 12:29:33,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:33,952 INFO L85 PathProgramCache]: Analyzing trace with hash 86418214, now seen corresponding path program 7 times [2024-06-14 12:29:33,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:33,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681233822] [2024-06-14 12:29:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:33,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681233822] [2024-06-14 12:29:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681233822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294996962] [2024-06-14 12:29:34,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:34,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:34,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 339 transitions, 3845 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:34,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:34,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:34,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:35,737 INFO L124 PetriNetUnfolderBase]: 2686/4263 cut-off events. [2024-06-14 12:29:35,737 INFO L125 PetriNetUnfolderBase]: For 620377/620379 co-relation queries the response was YES. [2024-06-14 12:29:35,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42703 conditions, 4263 events. 2686/4263 cut-off events. For 620377/620379 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24432 event pairs, 601 based on Foata normal form. 5/4264 useless extension candidates. Maximal degree in co-relation 42579. Up to 3221 conditions per place. [2024-06-14 12:29:35,793 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 218 selfloop transitions, 138 changer transitions 0/361 dead transitions. [2024-06-14 12:29:35,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 5245 flow [2024-06-14 12:29:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:29:35,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:29:35,794 INFO L175 Difference]: Start difference. First operand has 252 places, 339 transitions, 3845 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:29:35,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 5245 flow [2024-06-14 12:29:36,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4852 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:36,822 INFO L231 Difference]: Finished difference. Result has 257 places, 339 transitions, 3740 flow [2024-06-14 12:29:36,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3740, PETRI_PLACES=257, PETRI_TRANSITIONS=339} [2024-06-14 12:29:36,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 12:29:36,822 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 339 transitions, 3740 flow [2024-06-14 12:29:36,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:36,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:36,823 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 12:29:36,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:29:36,823 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 12:29:36,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1470751504, now seen corresponding path program 8 times [2024-06-14 12:29:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550937237] [2024-06-14 12:29:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:37,705 INFO 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 12:29:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550937237] [2024-06-14 12:29:37,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550937237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:37,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:37,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86055392] [2024-06-14 12:29:37,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:37,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:37,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 339 transitions, 3740 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:37,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:37,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:37,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:38,604 INFO L124 PetriNetUnfolderBase]: 2717/4311 cut-off events. [2024-06-14 12:29:38,604 INFO L125 PetriNetUnfolderBase]: For 638232/638234 co-relation queries the response was YES. [2024-06-14 12:29:38,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43079 conditions, 4311 events. 2717/4311 cut-off events. For 638232/638234 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24728 event pairs, 644 based on Foata normal form. 5/4312 useless extension candidates. Maximal degree in co-relation 42954. Up to 3250 conditions per place. [2024-06-14 12:29:38,658 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 156 changer transitions 0/369 dead transitions. [2024-06-14 12:29:38,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 369 transitions, 5386 flow [2024-06-14 12:29:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:29:38,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:29:38,659 INFO L175 Difference]: Start difference. First operand has 257 places, 339 transitions, 3740 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:29:38,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 369 transitions, 5386 flow [2024-06-14 12:29:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 369 transitions, 5055 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:29:39,604 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 4142 flow [2024-06-14 12:29:39,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4142, PETRI_PLACES=258, PETRI_TRANSITIONS=349} [2024-06-14 12:29:39,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 12:29:39,605 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 4142 flow [2024-06-14 12:29:39,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:39,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:39,605 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 12:29:39,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:29:39,605 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 12:29:39,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash 100228218, now seen corresponding path program 2 times [2024-06-14 12:29:39,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:39,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307641969] [2024-06-14 12:29:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:39,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:40,477 INFO 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 12:29:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:40,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307641969] [2024-06-14 12:29:40,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307641969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:40,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9544995] [2024-06-14 12:29:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:40,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:40,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:40,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 349 transitions, 4142 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:40,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:40,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:40,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:41,391 INFO L124 PetriNetUnfolderBase]: 2730/4304 cut-off events. [2024-06-14 12:29:41,391 INFO L125 PetriNetUnfolderBase]: For 655616/655623 co-relation queries the response was YES. [2024-06-14 12:29:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43913 conditions, 4304 events. 2730/4304 cut-off events. For 655616/655623 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24390 event pairs, 678 based on Foata normal form. 7/4309 useless extension candidates. Maximal degree in co-relation 43788. Up to 4016 conditions per place. [2024-06-14 12:29:41,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 52 changer transitions 0/372 dead transitions. [2024-06-14 12:29:41,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 372 transitions, 5624 flow [2024-06-14 12:29:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:29:41,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:29:41,443 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 4142 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:29:41,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 372 transitions, 5624 flow [2024-06-14 12:29:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 372 transitions, 5436 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:42,446 INFO L231 Difference]: Finished difference. Result has 264 places, 358 transitions, 4454 flow [2024-06-14 12:29:42,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4454, PETRI_PLACES=264, PETRI_TRANSITIONS=358} [2024-06-14 12:29:42,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:29:42,446 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 358 transitions, 4454 flow [2024-06-14 12:29:42,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:42,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:42,447 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 12:29:42,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:29:42,447 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 12:29:42,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash -313091186, now seen corresponding path program 9 times [2024-06-14 12:29:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:42,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616147941] [2024-06-14 12:29:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:43,320 INFO 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 12:29:43,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:43,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616147941] [2024-06-14 12:29:43,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616147941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:43,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952080329] [2024-06-14 12:29:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:43,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:43,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:43,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:43,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 358 transitions, 4454 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:43,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:44,378 INFO L124 PetriNetUnfolderBase]: 2745/4351 cut-off events. [2024-06-14 12:29:44,379 INFO L125 PetriNetUnfolderBase]: For 671832/671834 co-relation queries the response was YES. [2024-06-14 12:29:44,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44165 conditions, 4351 events. 2745/4351 cut-off events. For 671832/671834 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24929 event pairs, 643 based on Foata normal form. 5/4352 useless extension candidates. Maximal degree in co-relation 44038. Up to 3282 conditions per place. [2024-06-14 12:29:44,428 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 234 selfloop transitions, 144 changer transitions 0/383 dead transitions. [2024-06-14 12:29:44,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 383 transitions, 6095 flow [2024-06-14 12:29:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:29:44,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 12:29:44,430 INFO L175 Difference]: Start difference. First operand has 264 places, 358 transitions, 4454 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:29:44,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 383 transitions, 6095 flow [2024-06-14 12:29:45,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 383 transitions, 5921 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:45,345 INFO L231 Difference]: Finished difference. Result has 269 places, 362 transitions, 4702 flow [2024-06-14 12:29:45,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=269, PETRI_TRANSITIONS=362} [2024-06-14 12:29:45,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-14 12:29:45,346 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 362 transitions, 4702 flow [2024-06-14 12:29:45,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:45,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:45,346 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 12:29:45,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:29:45,346 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 12:29:45,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash 86418648, now seen corresponding path program 3 times [2024-06-14 12:29:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:45,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966060793] [2024-06-14 12:29:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:46,220 INFO 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 12:29:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966060793] [2024-06-14 12:29:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966060793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:46,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739277711] [2024-06-14 12:29:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:46,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:46,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 362 transitions, 4702 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:46,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:46,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:46,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:47,206 INFO L124 PetriNetUnfolderBase]: 2750/4338 cut-off events. [2024-06-14 12:29:47,207 INFO L125 PetriNetUnfolderBase]: For 679587/679594 co-relation queries the response was YES. [2024-06-14 12:29:47,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44921 conditions, 4338 events. 2750/4338 cut-off events. For 679587/679594 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24655 event pairs, 682 based on Foata normal form. 7/4343 useless extension candidates. Maximal degree in co-relation 44792. Up to 4043 conditions per place. [2024-06-14 12:29:47,265 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 53 changer transitions 0/379 dead transitions. [2024-06-14 12:29:47,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 379 transitions, 5940 flow [2024-06-14 12:29:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:29:47,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:29:47,266 INFO L175 Difference]: Start difference. First operand has 269 places, 362 transitions, 4702 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:29:47,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 379 transitions, 5940 flow [2024-06-14 12:29:48,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 379 transitions, 5476 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-14 12:29:48,811 INFO L231 Difference]: Finished difference. Result has 269 places, 365 transitions, 4468 flow [2024-06-14 12:29:48,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=269, PETRI_TRANSITIONS=365} [2024-06-14 12:29:48,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-14 12:29:48,812 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 365 transitions, 4468 flow [2024-06-14 12:29:48,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:48,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:48,812 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 12:29:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:29:48,812 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 12:29:48,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109554, now seen corresponding path program 10 times [2024-06-14 12:29:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816887180] [2024-06-14 12:29:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:49,786 INFO 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 12:29:49,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:49,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816887180] [2024-06-14 12:29:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816887180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:49,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:49,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:49,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076874724] [2024-06-14 12:29:49,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:49,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:49,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:49,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:49,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 365 transitions, 4468 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:49,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:49,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:49,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:50,776 INFO L124 PetriNetUnfolderBase]: 2745/4356 cut-off events. [2024-06-14 12:29:50,776 INFO L125 PetriNetUnfolderBase]: For 687260/687262 co-relation queries the response was YES. [2024-06-14 12:29:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43947 conditions, 4356 events. 2745/4356 cut-off events. For 687260/687262 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25013 event pairs, 641 based on Foata normal form. 5/4357 useless extension candidates. Maximal degree in co-relation 43820. Up to 3287 conditions per place. [2024-06-14 12:29:50,832 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 237 selfloop transitions, 143 changer transitions 0/385 dead transitions. [2024-06-14 12:29:50,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5828 flow [2024-06-14 12:29:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:29:50,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:29:50,833 INFO L175 Difference]: Start difference. First operand has 269 places, 365 transitions, 4468 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:29:50,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5828 flow [2024-06-14 12:29:52,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 385 transitions, 5550 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:52,014 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4484 flow [2024-06-14 12:29:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4484, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-14 12:29:52,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 12:29:52,015 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4484 flow [2024-06-14 12:29:52,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:52,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:52,016 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 12:29:52,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:29:52,016 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 12:29:52,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:52,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109988, now seen corresponding path program 4 times [2024-06-14 12:29:52,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385432665] [2024-06-14 12:29:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:52,903 INFO 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 12:29:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385432665] [2024-06-14 12:29:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385432665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:52,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:52,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224508644] [2024-06-14 12:29:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:52,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4484 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:53,795 INFO L124 PetriNetUnfolderBase]: 2742/4328 cut-off events. [2024-06-14 12:29:53,795 INFO L125 PetriNetUnfolderBase]: For 690799/690806 co-relation queries the response was YES. [2024-06-14 12:29:53,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44234 conditions, 4328 events. 2742/4328 cut-off events. For 690799/690806 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24559 event pairs, 682 based on Foata normal form. 7/4333 useless extension candidates. Maximal degree in co-relation 44106. Up to 4034 conditions per place. [2024-06-14 12:29:53,855 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 52 changer transitions 0/378 dead transitions. [2024-06-14 12:29:53,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 378 transitions, 5434 flow [2024-06-14 12:29:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:29:53,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:29:53,857 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4484 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:29:53,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 378 transitions, 5434 flow [2024-06-14 12:29:54,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 5077 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:54,910 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4237 flow [2024-06-14 12:29:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4237, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-14 12:29:54,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 12:29:54,910 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4237 flow [2024-06-14 12:29:54,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:54,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:54,910 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 12:29:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:29:54,911 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 12:29:54,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 100242168, now seen corresponding path program 5 times [2024-06-14 12:29:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271327525] [2024-06-14 12:29:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:55,829 INFO 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 12:29:55,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271327525] [2024-06-14 12:29:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271327525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:55,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:55,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:55,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576688640] [2024-06-14 12:29:55,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:55,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:55,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:55,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4237 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:55,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:55,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:55,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:56,810 INFO L124 PetriNetUnfolderBase]: 2739/4324 cut-off events. [2024-06-14 12:29:56,810 INFO L125 PetriNetUnfolderBase]: For 697921/697921 co-relation queries the response was YES. [2024-06-14 12:29:56,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43666 conditions, 4324 events. 2739/4324 cut-off events. For 697921/697921 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24547 event pairs, 673 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 43537. Up to 4085 conditions per place. [2024-06-14 12:29:56,864 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 20 changer transitions 0/377 dead transitions. [2024-06-14 12:29:56,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 377 transitions, 5009 flow [2024-06-14 12:29:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:29:56,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:29:56,866 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4237 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:29:56,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 377 transitions, 5009 flow [2024-06-14 12:29:58,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 4739 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-14 12:29:58,136 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4013 flow [2024-06-14 12:29:58,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4013, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-14 12:29:58,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 12:29:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4013 flow [2024-06-14 12:29:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:58,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:58,137 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 12:29:58,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:29:58,137 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 12:29:58,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1321205662, now seen corresponding path program 1 times [2024-06-14 12:29:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:58,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189361765] [2024-06-14 12:29:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:59,044 INFO 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 12:29:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189361765] [2024-06-14 12:29:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189361765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788044050] [2024-06-14 12:29:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:59,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:29:59,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4013 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:29:59,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:59,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:29:59,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:00,041 INFO L124 PetriNetUnfolderBase]: 2546/4130 cut-off events. [2024-06-14 12:30:00,042 INFO L125 PetriNetUnfolderBase]: For 721088/721092 co-relation queries the response was YES. [2024-06-14 12:30:00,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42598 conditions, 4130 events. 2546/4130 cut-off events. For 721088/721092 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24397 event pairs, 553 based on Foata normal form. 4/4124 useless extension candidates. Maximal degree in co-relation 42468. Up to 3503 conditions per place. [2024-06-14 12:30:00,095 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 15 changer transitions 0/389 dead transitions. [2024-06-14 12:30:00,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 389 transitions, 4805 flow [2024-06-14 12:30:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:30:00,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:30:00,096 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4013 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:30:00,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 389 transitions, 4805 flow [2024-06-14 12:30:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 4751 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:01,373 INFO L231 Difference]: Finished difference. Result has 274 places, 367 transitions, 4064 flow [2024-06-14 12:30:01,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=274, PETRI_TRANSITIONS=367} [2024-06-14 12:30:01,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 12:30:01,374 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 367 transitions, 4064 flow [2024-06-14 12:30:01,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:01,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:01,374 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 12:30:01,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:30:01,375 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 12:30:01,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash 505086976, now seen corresponding path program 2 times [2024-06-14 12:30:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:01,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828302270] [2024-06-14 12:30:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:02,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828302270] [2024-06-14 12:30:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828302270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:02,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:02,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111779788] [2024-06-14 12:30:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:02,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:02,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:30:02,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 367 transitions, 4064 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:02,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:02,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:30:02,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:03,454 INFO L124 PetriNetUnfolderBase]: 2554/4142 cut-off events. [2024-06-14 12:30:03,454 INFO L125 PetriNetUnfolderBase]: For 736735/736739 co-relation queries the response was YES. [2024-06-14 12:30:03,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43044 conditions, 4142 events. 2554/4142 cut-off events. For 736735/736739 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24475 event pairs, 589 based on Foata normal form. 4/4136 useless extension candidates. Maximal degree in co-relation 42913. Up to 3532 conditions per place. [2024-06-14 12:30:03,509 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 16 changer transitions 0/387 dead transitions. [2024-06-14 12:30:03,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 4846 flow [2024-06-14 12:30:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:30:03,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:30:03,511 INFO L175 Difference]: Start difference. First operand has 274 places, 367 transitions, 4064 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:30:03,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 4846 flow [2024-06-14 12:30:04,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 387 transitions, 4757 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:04,808 INFO L231 Difference]: Finished difference. Result has 276 places, 369 transitions, 4086 flow [2024-06-14 12:30:04,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4086, PETRI_PLACES=276, PETRI_TRANSITIONS=369} [2024-06-14 12:30:04,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:30:04,808 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 369 transitions, 4086 flow [2024-06-14 12:30:04,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:04,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:04,809 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 12:30:04,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:30:04,809 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 12:30:04,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:04,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1324067582, now seen corresponding path program 1 times [2024-06-14 12:30:04,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:04,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509154656] [2024-06-14 12:30:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:04,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:05,866 INFO 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 12:30:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509154656] [2024-06-14 12:30:05,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509154656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:05,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:05,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:05,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183089392] [2024-06-14 12:30:05,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:05,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:05,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:06,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:06,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 369 transitions, 4086 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:06,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:06,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:06,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:06,952 INFO L124 PetriNetUnfolderBase]: 2670/4261 cut-off events. [2024-06-14 12:30:06,952 INFO L125 PetriNetUnfolderBase]: For 741528/741528 co-relation queries the response was YES. [2024-06-14 12:30:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43568 conditions, 4261 events. 2670/4261 cut-off events. For 741528/741528 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24551 event pairs, 639 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 43436. Up to 3818 conditions per place. [2024-06-14 12:30:07,005 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 20 changer transitions 0/390 dead transitions. [2024-06-14 12:30:07,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 390 transitions, 4948 flow [2024-06-14 12:30:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:30:07,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:30:07,006 INFO L175 Difference]: Start difference. First operand has 276 places, 369 transitions, 4086 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:30:07,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 390 transitions, 4948 flow [2024-06-14 12:30:08,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 390 transitions, 4853 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:08,355 INFO L231 Difference]: Finished difference. Result has 279 places, 372 transitions, 4133 flow [2024-06-14 12:30:08,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=279, PETRI_TRANSITIONS=372} [2024-06-14 12:30:08,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:30:08,356 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 372 transitions, 4133 flow [2024-06-14 12:30:08,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:08,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:08,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:30:08,356 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 12:30:08,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash 48494752, now seen corresponding path program 3 times [2024-06-14 12:30:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718489418] [2024-06-14 12:30:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:09,346 INFO 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 12:30:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718489418] [2024-06-14 12:30:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718489418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:09,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847885174] [2024-06-14 12:30:09,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:09,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:09,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:09,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:09,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:30:09,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 372 transitions, 4133 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:09,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:09,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:30:09,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:10,313 INFO L124 PetriNetUnfolderBase]: 2554/4146 cut-off events. [2024-06-14 12:30:10,313 INFO L125 PetriNetUnfolderBase]: For 761449/761457 co-relation queries the response was YES. [2024-06-14 12:30:10,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43379 conditions, 4146 events. 2554/4146 cut-off events. For 761449/761457 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24500 event pairs, 583 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 43246. Up to 3543 conditions per place. [2024-06-14 12:30:10,368 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 323 selfloop transitions, 16 changer transitions 0/392 dead transitions. [2024-06-14 12:30:10,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 392 transitions, 4952 flow [2024-06-14 12:30:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:30:10,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:30:10,369 INFO L175 Difference]: Start difference. First operand has 279 places, 372 transitions, 4133 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:30:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 392 transitions, 4952 flow [2024-06-14 12:30:11,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 4838 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:11,894 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 4171 flow [2024-06-14 12:30:11,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4171, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-14 12:30:11,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 12:30:11,895 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 4171 flow [2024-06-14 12:30:11,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:11,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:11,895 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 12:30:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:30:11,895 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 12:30:11,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -135947328, now seen corresponding path program 4 times [2024-06-14 12:30:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:11,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416478478] [2024-06-14 12:30:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:11,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:12,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:12,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416478478] [2024-06-14 12:30:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416478478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:12,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:12,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:12,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155174833] [2024-06-14 12:30:12,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:12,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:12,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:30:12,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 4171 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:12,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:12,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:30:12,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:13,882 INFO L124 PetriNetUnfolderBase]: 2549/4140 cut-off events. [2024-06-14 12:30:13,882 INFO L125 PetriNetUnfolderBase]: For 768386/768400 co-relation queries the response was YES. [2024-06-14 12:30:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 4140 events. 2549/4140 cut-off events. For 768386/768400 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24490 event pairs, 582 based on Foata normal form. 10/4128 useless extension candidates. Maximal degree in co-relation 43317. Up to 3527 conditions per place. [2024-06-14 12:30:13,941 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 23 changer transitions 0/394 dead transitions. [2024-06-14 12:30:13,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 394 transitions, 4992 flow [2024-06-14 12:30:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:30:13,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:30:13,942 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 4171 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:30:13,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 394 transitions, 4992 flow [2024-06-14 12:30:15,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 394 transitions, 4885 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:15,287 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4236 flow [2024-06-14 12:30:15,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-14 12:30:15,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-14 12:30:15,287 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4236 flow [2024-06-14 12:30:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 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 12:30:15,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:15,287 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 12:30:15,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:30:15,288 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 12:30:15,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash 100720312, now seen corresponding path program 1 times [2024-06-14 12:30:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644201358] [2024-06-14 12:30:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:16,581 INFO 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 12:30:16,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:16,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644201358] [2024-06-14 12:30:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644201358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:16,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:16,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:30:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169335245] [2024-06-14 12:30:16,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:16,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:30:16,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:30:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:30:16,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:16,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4236 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:16,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:16,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:16,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:17,577 INFO L124 PetriNetUnfolderBase]: 2747/4346 cut-off events. [2024-06-14 12:30:17,577 INFO L125 PetriNetUnfolderBase]: For 774778/774778 co-relation queries the response was YES. [2024-06-14 12:30:17,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 4346 events. 2747/4346 cut-off events. For 774778/774778 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24812 event pairs, 659 based on Foata normal form. 2/4347 useless extension candidates. Maximal degree in co-relation 44682. Up to 4093 conditions per place. [2024-06-14 12:30:17,635 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 371 selfloop transitions, 22 changer transitions 0/398 dead transitions. [2024-06-14 12:30:17,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 398 transitions, 5166 flow [2024-06-14 12:30:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:30:17,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 12:30:17,636 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4236 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:30:17,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 398 transitions, 5166 flow [2024-06-14 12:30:19,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 398 transitions, 5039 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:19,259 INFO L231 Difference]: Finished difference. Result has 290 places, 384 transitions, 4274 flow [2024-06-14 12:30:19,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4274, PETRI_PLACES=290, PETRI_TRANSITIONS=384} [2024-06-14 12:30:19,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 12:30:19,260 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 384 transitions, 4274 flow [2024-06-14 12:30:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:19,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:19,260 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 12:30:19,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:30:19,261 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 12:30:19,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1483164742, now seen corresponding path program 1 times [2024-06-14 12:30:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142469198] [2024-06-14 12:30:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:20,090 INFO 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 12:30:20,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:20,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142469198] [2024-06-14 12:30:20,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142469198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:20,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:20,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:20,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545837490] [2024-06-14 12:30:20,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:20,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:20,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:20,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:20,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:20,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 384 transitions, 4274 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:20,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:20,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:20,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:21,181 INFO L124 PetriNetUnfolderBase]: 2783/4401 cut-off events. [2024-06-14 12:30:21,181 INFO L125 PetriNetUnfolderBase]: For 820063/820065 co-relation queries the response was YES. [2024-06-14 12:30:21,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 4401 events. 2783/4401 cut-off events. For 820063/820065 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25109 event pairs, 519 based on Foata normal form. 12/4412 useless extension candidates. Maximal degree in co-relation 45315. Up to 3950 conditions per place. [2024-06-14 12:30:21,243 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 27 changer transitions 0/422 dead transitions. [2024-06-14 12:30:21,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 422 transitions, 5392 flow [2024-06-14 12:30:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:30:21,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:30:21,244 INFO L175 Difference]: Start difference. First operand has 290 places, 384 transitions, 4274 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:30:21,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 422 transitions, 5392 flow [2024-06-14 12:30:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 5235 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:22,825 INFO L231 Difference]: Finished difference. Result has 291 places, 386 transitions, 4270 flow [2024-06-14 12:30:22,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4270, PETRI_PLACES=291, PETRI_TRANSITIONS=386} [2024-06-14 12:30:22,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:30:22,826 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 386 transitions, 4270 flow [2024-06-14 12:30:22,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:22,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:22,826 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 12:30:22,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:30:22,827 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 12:30:22,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:22,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1748862022, now seen corresponding path program 2 times [2024-06-14 12:30:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704520005] [2024-06-14 12:30:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704520005] [2024-06-14 12:30:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704520005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:23,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:23,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806381611] [2024-06-14 12:30:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:23,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:23,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:23,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 386 transitions, 4270 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:23,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:23,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:23,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:24,843 INFO L124 PetriNetUnfolderBase]: 2899/4583 cut-off events. [2024-06-14 12:30:24,844 INFO L125 PetriNetUnfolderBase]: For 903631/903633 co-relation queries the response was YES. [2024-06-14 12:30:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 4583 events. 2899/4583 cut-off events. For 903631/903633 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26361 event pairs, 689 based on Foata normal form. 14/4596 useless extension candidates. Maximal degree in co-relation 48276. Up to 4060 conditions per place. [2024-06-14 12:30:24,904 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 388 selfloop transitions, 33 changer transitions 0/426 dead transitions. [2024-06-14 12:30:24,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 426 transitions, 5732 flow [2024-06-14 12:30:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:30:24,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:30:24,905 INFO L175 Difference]: Start difference. First operand has 291 places, 386 transitions, 4270 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:30:24,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 426 transitions, 5732 flow [2024-06-14 12:30:26,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 426 transitions, 5613 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:26,507 INFO L231 Difference]: Finished difference. Result has 293 places, 390 transitions, 4414 flow [2024-06-14 12:30:26,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4414, PETRI_PLACES=293, PETRI_TRANSITIONS=390} [2024-06-14 12:30:26,507 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 12:30:26,507 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 390 transitions, 4414 flow [2024-06-14 12:30:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:26,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:26,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:30:26,508 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 12:30:26,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1749188452, now seen corresponding path program 3 times [2024-06-14 12:30:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:26,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980344952] [2024-06-14 12:30:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:27,390 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 12:30:27,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980344952] [2024-06-14 12:30:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980344952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:27,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848794308] [2024-06-14 12:30:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:27,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:27,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:27,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:27,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 390 transitions, 4414 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:27,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:27,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:27,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:28,557 INFO L124 PetriNetUnfolderBase]: 2871/4545 cut-off events. [2024-06-14 12:30:28,557 INFO L125 PetriNetUnfolderBase]: For 869566/869568 co-relation queries the response was YES. [2024-06-14 12:30:28,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47101 conditions, 4545 events. 2871/4545 cut-off events. For 869566/869568 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26155 event pairs, 703 based on Foata normal form. 14/4558 useless extension candidates. Maximal degree in co-relation 46961. Up to 4158 conditions per place. [2024-06-14 12:30:28,618 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 386 selfloop transitions, 30 changer transitions 0/421 dead transitions. [2024-06-14 12:30:28,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 5416 flow [2024-06-14 12:30:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:30:28,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:30:28,620 INFO L175 Difference]: Start difference. First operand has 293 places, 390 transitions, 4414 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:30:28,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 5416 flow [2024-06-14 12:30:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 421 transitions, 5239 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:30,395 INFO L231 Difference]: Finished difference. Result has 297 places, 390 transitions, 4303 flow [2024-06-14 12:30:30,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4303, PETRI_PLACES=297, PETRI_TRANSITIONS=390} [2024-06-14 12:30:30,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 12:30:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 390 transitions, 4303 flow [2024-06-14 12:30:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:30,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:30,396 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 12:30:30,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:30:30,396 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 12:30:30,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1749200356, now seen corresponding path program 1 times [2024-06-14 12:30:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:30,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515411495] [2024-06-14 12:30:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515411495] [2024-06-14 12:30:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515411495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:31,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:31,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:30:31,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88657432] [2024-06-14 12:30:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:31,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:30:31,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:30:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:30:31,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:31,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 390 transitions, 4303 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:31,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:31,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:31,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:32,592 INFO L124 PetriNetUnfolderBase]: 2886/4568 cut-off events. [2024-06-14 12:30:32,592 INFO L125 PetriNetUnfolderBase]: For 840641/840643 co-relation queries the response was YES. [2024-06-14 12:30:32,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47222 conditions, 4568 events. 2886/4568 cut-off events. For 840641/840643 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26339 event pairs, 704 based on Foata normal form. 5/4572 useless extension candidates. Maximal degree in co-relation 47080. Up to 4205 conditions per place. [2024-06-14 12:30:32,655 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 382 selfloop transitions, 36 changer transitions 0/423 dead transitions. [2024-06-14 12:30:32,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 423 transitions, 5411 flow [2024-06-14 12:30:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:30:32,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 12:30:32,658 INFO L175 Difference]: Start difference. First operand has 297 places, 390 transitions, 4303 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:30:32,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 423 transitions, 5411 flow [2024-06-14 12:30:34,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 423 transitions, 5345 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:34,521 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4478 flow [2024-06-14 12:30:34,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4478, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-14 12:30:34,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-14 12:30:34,522 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4478 flow [2024-06-14 12:30:34,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:34,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:34,523 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 12:30:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:30:34,523 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 12:30:34,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2052761090, now seen corresponding path program 4 times [2024-06-14 12:30:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:34,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483234155] [2024-06-14 12:30:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:35,429 INFO 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 12:30:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:35,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483234155] [2024-06-14 12:30:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483234155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:35,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517594847] [2024-06-14 12:30:35,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:35,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:35,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:35,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:35,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4478 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:35,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:35,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:35,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:36,679 INFO L124 PetriNetUnfolderBase]: 2930/4652 cut-off events. [2024-06-14 12:30:36,679 INFO L125 PetriNetUnfolderBase]: For 905895/905897 co-relation queries the response was YES. [2024-06-14 12:30:36,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48540 conditions, 4652 events. 2930/4652 cut-off events. For 905895/905897 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27024 event pairs, 698 based on Foata normal form. 14/4665 useless extension candidates. Maximal degree in co-relation 48397. Up to 4100 conditions per place. [2024-06-14 12:30:36,739 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 356 selfloop transitions, 61 changer transitions 0/422 dead transitions. [2024-06-14 12:30:36,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 422 transitions, 5584 flow [2024-06-14 12:30:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:30:36,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:30:36,740 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4478 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:30:36,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 422 transitions, 5584 flow [2024-06-14 12:30:38,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 422 transitions, 5371 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:38,445 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 4497 flow [2024-06-14 12:30:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-06-14 12:30:38,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 12:30:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 4497 flow [2024-06-14 12:30:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:38,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:38,446 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 12:30:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:30:38,446 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 12:30:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2052434660, now seen corresponding path program 5 times [2024-06-14 12:30:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393397228] [2024-06-14 12:30:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:39,349 INFO 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 12:30:39,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:39,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393397228] [2024-06-14 12:30:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393397228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:39,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:39,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473997964] [2024-06-14 12:30:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:39,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:39,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 4497 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:39,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:39,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:40,592 INFO L124 PetriNetUnfolderBase]: 3046/4824 cut-off events. [2024-06-14 12:30:40,592 INFO L125 PetriNetUnfolderBase]: For 988472/988474 co-relation queries the response was YES. [2024-06-14 12:30:40,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51733 conditions, 4824 events. 3046/4824 cut-off events. For 988472/988474 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28106 event pairs, 708 based on Foata normal form. 14/4837 useless extension candidates. Maximal degree in co-relation 51589. Up to 4090 conditions per place. [2024-06-14 12:30:40,656 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 360 selfloop transitions, 66 changer transitions 0/431 dead transitions. [2024-06-14 12:30:40,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 431 transitions, 6003 flow [2024-06-14 12:30:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:30:40,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:30:40,658 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 4497 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:30:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 431 transitions, 6003 flow [2024-06-14 12:30:42,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 431 transitions, 5809 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:42,213 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 4652 flow [2024-06-14 12:30:42,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4652, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-14 12:30:42,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 12:30:42,214 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 4652 flow [2024-06-14 12:30:42,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:42,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:42,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:42,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:30:42,214 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 12:30:42,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1552973264, now seen corresponding path program 6 times [2024-06-14 12:30:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:42,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905009434] [2024-06-14 12:30:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905009434] [2024-06-14 12:30:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905009434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443853869] [2024-06-14 12:30:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:43,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 4652 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:43,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:43,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:43,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:44,239 INFO L124 PetriNetUnfolderBase]: 3018/4790 cut-off events. [2024-06-14 12:30:44,239 INFO L125 PetriNetUnfolderBase]: For 949194/949196 co-relation queries the response was YES. [2024-06-14 12:30:44,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 4790 events. 3018/4790 cut-off events. For 949194/949196 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28026 event pairs, 716 based on Foata normal form. 14/4803 useless extension candidates. Maximal degree in co-relation 50160. Up to 4236 conditions per place. [2024-06-14 12:30:44,304 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 60 changer transitions 0/426 dead transitions. [2024-06-14 12:30:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 426 transitions, 5666 flow [2024-06-14 12:30:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:30:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:30:44,305 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 4652 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:30:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 426 transitions, 5666 flow [2024-06-14 12:30:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 426 transitions, 5435 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:46,203 INFO L231 Difference]: Finished difference. Result has 306 places, 400 transitions, 4547 flow [2024-06-14 12:30:46,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4547, PETRI_PLACES=306, PETRI_TRANSITIONS=400} [2024-06-14 12:30:46,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 12:30:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 400 transitions, 4547 flow [2024-06-14 12:30:46,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:46,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:46,204 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 12:30:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:30:46,205 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 12:30:46,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 545552406, now seen corresponding path program 1 times [2024-06-14 12:30:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:46,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31669931] [2024-06-14 12:30:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:47,150 INFO 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 12:30:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:47,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31669931] [2024-06-14 12:30:47,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31669931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:47,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:47,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11959703] [2024-06-14 12:30:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:47,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:47,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:47,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 400 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:47,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:47,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:47,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:48,388 INFO L124 PetriNetUnfolderBase]: 2877/4637 cut-off events. [2024-06-14 12:30:48,389 INFO L125 PetriNetUnfolderBase]: For 906294/906302 co-relation queries the response was YES. [2024-06-14 12:30:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49189 conditions, 4637 events. 2877/4637 cut-off events. For 906294/906302 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27720 event pairs, 706 based on Foata normal form. 7/4625 useless extension candidates. Maximal degree in co-relation 49042. Up to 3961 conditions per place. [2024-06-14 12:30:48,447 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 39 changer transitions 0/429 dead transitions. [2024-06-14 12:30:48,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 429 transitions, 5523 flow [2024-06-14 12:30:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:30:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:30:48,448 INFO L175 Difference]: Start difference. First operand has 306 places, 400 transitions, 4547 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:30:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 429 transitions, 5523 flow [2024-06-14 12:30:50,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 429 transitions, 5389 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:50,748 INFO L231 Difference]: Finished difference. Result has 306 places, 406 transitions, 4639 flow [2024-06-14 12:30:50,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=306, PETRI_TRANSITIONS=406} [2024-06-14 12:30:50,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-14 12:30:50,749 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 406 transitions, 4639 flow [2024-06-14 12:30:50,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:50,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:50,749 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 12:30:50,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:30:50,749 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 12:30:50,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1534930668, now seen corresponding path program 2 times [2024-06-14 12:30:50,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:50,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828737678] [2024-06-14 12:30:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:50,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828737678] [2024-06-14 12:30:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828737678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:51,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614198347] [2024-06-14 12:30:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:51,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:51,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:51,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:51,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 406 transitions, 4639 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:51,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:51,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:53,015 INFO L124 PetriNetUnfolderBase]: 3006/4857 cut-off events. [2024-06-14 12:30:53,015 INFO L125 PetriNetUnfolderBase]: For 935411/935419 co-relation queries the response was YES. [2024-06-14 12:30:53,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51357 conditions, 4857 events. 3006/4857 cut-off events. For 935411/935419 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29199 event pairs, 736 based on Foata normal form. 7/4843 useless extension candidates. Maximal degree in co-relation 51209. Up to 4051 conditions per place. [2024-06-14 12:30:53,086 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 66 changer transitions 0/462 dead transitions. [2024-06-14 12:30:53,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 462 transitions, 6428 flow [2024-06-14 12:30:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:30:53,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:30:53,087 INFO L175 Difference]: Start difference. First operand has 306 places, 406 transitions, 4639 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:30:53,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 462 transitions, 6428 flow [2024-06-14 12:30:55,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 462 transitions, 6112 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:55,219 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 5175 flow [2024-06-14 12:30:55,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5175, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2024-06-14 12:30:55,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:30:55,220 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 5175 flow [2024-06-14 12:30:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:55,220 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 12:30:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:30:55,220 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 12:30:55,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1144307848, now seen corresponding path program 3 times [2024-06-14 12:30:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307003088] [2024-06-14 12:30:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,353 INFO 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 12:30:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307003088] [2024-06-14 12:30:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307003088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229496586] [2024-06-14 12:30:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:56,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:56,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:30:56,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 5175 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:56,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:30:56,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:57,561 INFO L124 PetriNetUnfolderBase]: 3178/5131 cut-off events. [2024-06-14 12:30:57,561 INFO L125 PetriNetUnfolderBase]: For 972154/972164 co-relation queries the response was YES. [2024-06-14 12:30:57,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54378 conditions, 5131 events. 3178/5131 cut-off events. For 972154/972164 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31149 event pairs, 720 based on Foata normal form. 9/5121 useless extension candidates. Maximal degree in co-relation 54225. Up to 4201 conditions per place. [2024-06-14 12:30:57,638 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 377 selfloop transitions, 116 changer transitions 0/531 dead transitions. [2024-06-14 12:30:57,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 531 transitions, 7597 flow [2024-06-14 12:30:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:30:57,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:30:57,639 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 5175 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:30:57,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 531 transitions, 7597 flow [2024-06-14 12:31:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 531 transitions, 7283 flow, removed 136 selfloop flow, removed 2 redundant places. [2024-06-14 12:31:00,076 INFO L231 Difference]: Finished difference. Result has 324 places, 498 transitions, 6316 flow [2024-06-14 12:31:00,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=324, PETRI_TRANSITIONS=498} [2024-06-14 12:31:00,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 12:31:00,076 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 498 transitions, 6316 flow [2024-06-14 12:31:00,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:00,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:00,076 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 12:31:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:31:00,077 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 12:31:00,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -870585496, now seen corresponding path program 1 times [2024-06-14 12:31:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113520037] [2024-06-14 12:31:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:01,080 INFO 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 12:31:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113520037] [2024-06-14 12:31:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113520037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279018967] [2024-06-14 12:31:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:01,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:01,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 498 transitions, 6316 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:01,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:01,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:01,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:02,541 INFO L124 PetriNetUnfolderBase]: 3383/5353 cut-off events. [2024-06-14 12:31:02,541 INFO L125 PetriNetUnfolderBase]: For 996626/996630 co-relation queries the response was YES. [2024-06-14 12:31:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57361 conditions, 5353 events. 3383/5353 cut-off events. For 996626/996630 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31541 event pairs, 780 based on Foata normal form. 6/5358 useless extension candidates. Maximal degree in co-relation 57202. Up to 4797 conditions per place. [2024-06-14 12:31:02,624 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 469 selfloop transitions, 74 changer transitions 0/548 dead transitions. [2024-06-14 12:31:02,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 548 transitions, 7877 flow [2024-06-14 12:31:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:31:02,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 12:31:02,626 INFO L175 Difference]: Start difference. First operand has 324 places, 498 transitions, 6316 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:31:02,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 548 transitions, 7877 flow [2024-06-14 12:31:05,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 548 transitions, 7730 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-14 12:31:05,261 INFO L231 Difference]: Finished difference. Result has 337 places, 517 transitions, 6776 flow [2024-06-14 12:31:05,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6776, PETRI_PLACES=337, PETRI_TRANSITIONS=517} [2024-06-14 12:31:05,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 12:31:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 517 transitions, 6776 flow [2024-06-14 12:31:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:05,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:05,262 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 12:31:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:31:05,262 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 12:31:05,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1493846570, now seen corresponding path program 4 times [2024-06-14 12:31:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074966552] [2024-06-14 12:31:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:05,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:06,181 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 12:31:06,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:06,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074966552] [2024-06-14 12:31:06,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074966552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:06,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:06,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:06,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770990537] [2024-06-14 12:31:06,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:06,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:06,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:31:06,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 517 transitions, 6776 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:06,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:06,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:31:06,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:07,683 INFO L124 PetriNetUnfolderBase]: 3261/5272 cut-off events. [2024-06-14 12:31:07,683 INFO L125 PetriNetUnfolderBase]: For 1018047/1018063 co-relation queries the response was YES. [2024-06-14 12:31:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57884 conditions, 5272 events. 3261/5272 cut-off events. For 1018047/1018063 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32081 event pairs, 738 based on Foata normal form. 18/5272 useless extension candidates. Maximal degree in co-relation 57718. Up to 4405 conditions per place. [2024-06-14 12:31:07,767 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 442 selfloop transitions, 79 changer transitions 0/560 dead transitions. [2024-06-14 12:31:07,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 560 transitions, 8236 flow [2024-06-14 12:31:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 12:31:07,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-14 12:31:07,768 INFO L175 Difference]: Start difference. First operand has 337 places, 517 transitions, 6776 flow. Second operand 9 states and 181 transitions. [2024-06-14 12:31:07,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 560 transitions, 8236 flow [2024-06-14 12:31:10,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 560 transitions, 8012 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 12:31:10,701 INFO L231 Difference]: Finished difference. Result has 345 places, 534 transitions, 7137 flow [2024-06-14 12:31:10,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6559, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7137, PETRI_PLACES=345, PETRI_TRANSITIONS=534} [2024-06-14 12:31:10,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 12:31:10,702 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 534 transitions, 7137 flow [2024-06-14 12:31:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:10,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:10,702 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 12:31:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:31:10,702 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 12:31:10,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -866860629, now seen corresponding path program 1 times [2024-06-14 12:31:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049029306] [2024-06-14 12:31:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:11,534 INFO 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 12:31:11,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:11,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049029306] [2024-06-14 12:31:11,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049029306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:11,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:11,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:11,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486633596] [2024-06-14 12:31:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:11,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:11,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:11,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 534 transitions, 7137 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:11,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:11,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:11,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:12,919 INFO L124 PetriNetUnfolderBase]: 3478/5515 cut-off events. [2024-06-14 12:31:12,919 INFO L125 PetriNetUnfolderBase]: For 1046047/1046051 co-relation queries the response was YES. [2024-06-14 12:31:12,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59996 conditions, 5515 events. 3478/5515 cut-off events. For 1046047/1046051 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32735 event pairs, 763 based on Foata normal form. 8/5522 useless extension candidates. Maximal degree in co-relation 59827. Up to 4966 conditions per place. [2024-06-14 12:31:13,003 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 507 selfloop transitions, 60 changer transitions 0/572 dead transitions. [2024-06-14 12:31:13,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 572 transitions, 8576 flow [2024-06-14 12:31:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:31:13,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 12:31:13,005 INFO L175 Difference]: Start difference. First operand has 345 places, 534 transitions, 7137 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:31:13,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 572 transitions, 8576 flow [2024-06-14 12:31:16,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 572 transitions, 8276 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:16,465 INFO L231 Difference]: Finished difference. Result has 352 places, 546 transitions, 7196 flow [2024-06-14 12:31:16,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7196, PETRI_PLACES=352, PETRI_TRANSITIONS=546} [2024-06-14 12:31:16,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 12:31:16,466 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 546 transitions, 7196 flow [2024-06-14 12:31:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:16,466 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 12:31:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:31:16,466 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 12:31:16,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -114377429, now seen corresponding path program 2 times [2024-06-14 12:31:16,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565573897] [2024-06-14 12:31:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:17,320 INFO 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 12:31:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565573897] [2024-06-14 12:31:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565573897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:17,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:17,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:17,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898143605] [2024-06-14 12:31:17,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:17,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:17,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:17,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 546 transitions, 7196 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:17,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:17,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:17,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:18,847 INFO L124 PetriNetUnfolderBase]: 3836/6085 cut-off events. [2024-06-14 12:31:18,847 INFO L125 PetriNetUnfolderBase]: For 1118103/1118107 co-relation queries the response was YES. [2024-06-14 12:31:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64929 conditions, 6085 events. 3836/6085 cut-off events. For 1118103/1118107 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36928 event pairs, 807 based on Foata normal form. 8/6092 useless extension candidates. Maximal degree in co-relation 64758. Up to 5141 conditions per place. [2024-06-14 12:31:18,944 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 536 selfloop transitions, 114 changer transitions 0/655 dead transitions. [2024-06-14 12:31:18,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 655 transitions, 10214 flow [2024-06-14 12:31:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:31:18,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:31:18,946 INFO L175 Difference]: Start difference. First operand has 352 places, 546 transitions, 7196 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:31:18,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 655 transitions, 10214 flow [2024-06-14 12:31:22,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 655 transitions, 10078 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:22,177 INFO L231 Difference]: Finished difference. Result has 360 places, 609 transitions, 8432 flow [2024-06-14 12:31:22,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8432, PETRI_PLACES=360, PETRI_TRANSITIONS=609} [2024-06-14 12:31:22,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 12:31:22,178 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 609 transitions, 8432 flow [2024-06-14 12:31:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:22,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:22,178 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 12:31:22,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:31:22,178 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 12:31:22,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:22,178 INFO L85 PathProgramCache]: Analyzing trace with hash -106758869, now seen corresponding path program 3 times [2024-06-14 12:31:22,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:22,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333983736] [2024-06-14 12:31:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:22,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:23,039 INFO 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 12:31:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333983736] [2024-06-14 12:31:23,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333983736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:23,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:23,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991493831] [2024-06-14 12:31:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:23,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:23,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 609 transitions, 8432 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:23,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:24,543 INFO L124 PetriNetUnfolderBase]: 3856/6103 cut-off events. [2024-06-14 12:31:24,543 INFO L125 PetriNetUnfolderBase]: For 1140681/1140685 co-relation queries the response was YES. [2024-06-14 12:31:24,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66124 conditions, 6103 events. 3856/6103 cut-off events. For 1140681/1140685 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36826 event pairs, 771 based on Foata normal form. 8/6110 useless extension candidates. Maximal degree in co-relation 65949. Up to 5157 conditions per place. [2024-06-14 12:31:24,638 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 533 selfloop transitions, 120 changer transitions 0/658 dead transitions. [2024-06-14 12:31:24,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 658 transitions, 10439 flow [2024-06-14 12:31:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:24,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:31:24,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 12:31:24,639 INFO L175 Difference]: Start difference. First operand has 360 places, 609 transitions, 8432 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:31:24,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 658 transitions, 10439 flow [2024-06-14 12:31:27,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 658 transitions, 10317 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:27,954 INFO L231 Difference]: Finished difference. Result has 368 places, 625 transitions, 8903 flow [2024-06-14 12:31:27,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8903, PETRI_PLACES=368, PETRI_TRANSITIONS=625} [2024-06-14 12:31:27,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 12:31:27,955 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 625 transitions, 8903 flow [2024-06-14 12:31:27,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:27,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:27,955 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 12:31:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:31:27,956 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 12:31:27,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2065302319, now seen corresponding path program 4 times [2024-06-14 12:31:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759947278] [2024-06-14 12:31:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:28,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:28,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759947278] [2024-06-14 12:31:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759947278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366103596] [2024-06-14 12:31:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:28,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:28,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 625 transitions, 8903 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:28,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:28,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:30,409 INFO L124 PetriNetUnfolderBase]: 3844/6087 cut-off events. [2024-06-14 12:31:30,409 INFO L125 PetriNetUnfolderBase]: For 1134623/1134627 co-relation queries the response was YES. [2024-06-14 12:31:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66326 conditions, 6087 events. 3844/6087 cut-off events. For 1134623/1134627 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36825 event pairs, 771 based on Foata normal form. 8/6094 useless extension candidates. Maximal degree in co-relation 66147. Up to 5149 conditions per place. [2024-06-14 12:31:30,510 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 535 selfloop transitions, 118 changer transitions 0/658 dead transitions. [2024-06-14 12:31:30,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 658 transitions, 10655 flow [2024-06-14 12:31:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:31:30,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:31:30,512 INFO L175 Difference]: Start difference. First operand has 368 places, 625 transitions, 8903 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:31:30,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 658 transitions, 10655 flow [2024-06-14 12:31:34,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 658 transitions, 10403 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:34,148 INFO L231 Difference]: Finished difference. Result has 373 places, 625 transitions, 8894 flow [2024-06-14 12:31:34,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8894, PETRI_PLACES=373, PETRI_TRANSITIONS=625} [2024-06-14 12:31:34,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 12:31:34,149 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 625 transitions, 8894 flow [2024-06-14 12:31:34,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:34,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:34,149 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 12:31:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:31:34,150 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 12:31:34,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1463713142, now seen corresponding path program 2 times [2024-06-14 12:31:34,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:34,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791430454] [2024-06-14 12:31:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:35,126 INFO 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 12:31:35,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791430454] [2024-06-14 12:31:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791430454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:35,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:35,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212660410] [2024-06-14 12:31:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:35,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:35,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 625 transitions, 8894 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:35,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:35,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:35,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:36,861 INFO L124 PetriNetUnfolderBase]: 3935/6221 cut-off events. [2024-06-14 12:31:36,861 INFO L125 PetriNetUnfolderBase]: For 1196903/1196907 co-relation queries the response was YES. [2024-06-14 12:31:36,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 6221 events. 3935/6221 cut-off events. For 1196903/1196907 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37689 event pairs, 815 based on Foata normal form. 7/6227 useless extension candidates. Maximal degree in co-relation 68429. Up to 5152 conditions per place. [2024-06-14 12:31:36,963 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 544 selfloop transitions, 131 changer transitions 0/680 dead transitions. [2024-06-14 12:31:36,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 680 transitions, 11475 flow [2024-06-14 12:31:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:31:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:31:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 12:31:36,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-14 12:31:36,965 INFO L175 Difference]: Start difference. First operand has 373 places, 625 transitions, 8894 flow. Second operand 11 states and 210 transitions. [2024-06-14 12:31:36,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 680 transitions, 11475 flow [2024-06-14 12:31:40,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 680 transitions, 11313 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:40,502 INFO L231 Difference]: Finished difference. Result has 379 places, 650 transitions, 9759 flow [2024-06-14 12:31:40,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9759, PETRI_PLACES=379, PETRI_TRANSITIONS=650} [2024-06-14 12:31:40,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 12:31:40,503 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 650 transitions, 9759 flow [2024-06-14 12:31:40,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:40,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:40,503 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 12:31:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:31:40,503 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 12:31:40,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1474826177, now seen corresponding path program 1 times [2024-06-14 12:31:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:40,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606320678] [2024-06-14 12:31:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:41,634 INFO 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 12:31:41,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:41,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606320678] [2024-06-14 12:31:41,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606320678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:41,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:41,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000072632] [2024-06-14 12:31:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:41,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:41,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:41,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:41,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 650 transitions, 9759 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:41,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:41,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:41,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:43,387 INFO L124 PetriNetUnfolderBase]: 3940/6209 cut-off events. [2024-06-14 12:31:43,387 INFO L125 PetriNetUnfolderBase]: For 1211680/1211690 co-relation queries the response was YES. [2024-06-14 12:31:43,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69877 conditions, 6209 events. 3940/6209 cut-off events. For 1211680/1211690 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 37516 event pairs, 1098 based on Foata normal form. 11/6219 useless extension candidates. Maximal degree in co-relation 69695. Up to 5794 conditions per place. [2024-06-14 12:31:43,481 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 642 selfloop transitions, 30 changer transitions 0/677 dead transitions. [2024-06-14 12:31:43,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 677 transitions, 11336 flow [2024-06-14 12:31:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:31:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:31:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 12:31:43,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 12:31:43,482 INFO L175 Difference]: Start difference. First operand has 379 places, 650 transitions, 9759 flow. Second operand 11 states and 186 transitions. [2024-06-14 12:31:43,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 677 transitions, 11336 flow [2024-06-14 12:31:47,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 677 transitions, 11056 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:47,144 INFO L231 Difference]: Finished difference. Result has 388 places, 656 transitions, 9743 flow [2024-06-14 12:31:47,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9483, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9743, PETRI_PLACES=388, PETRI_TRANSITIONS=656} [2024-06-14 12:31:47,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-14 12:31:47,144 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 656 transitions, 9743 flow [2024-06-14 12:31:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:47,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:47,146 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 12:31:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:31:47,146 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 12:31:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -106762434, now seen corresponding path program 3 times [2024-06-14 12:31:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449129066] [2024-06-14 12:31:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449129066] [2024-06-14 12:31:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449129066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:48,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:48,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567397895] [2024-06-14 12:31:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:48,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:48,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 656 transitions, 9743 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:48,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:48,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:48,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:49,916 INFO L124 PetriNetUnfolderBase]: 3983/6284 cut-off events. [2024-06-14 12:31:49,916 INFO L125 PetriNetUnfolderBase]: For 1263094/1263096 co-relation queries the response was YES. [2024-06-14 12:31:49,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 6284 events. 3983/6284 cut-off events. For 1263094/1263096 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37982 event pairs, 768 based on Foata normal form. 5/6288 useless extension candidates. Maximal degree in co-relation 70900. Up to 5199 conditions per place. [2024-06-14 12:31:50,019 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 551 selfloop transitions, 137 changer transitions 0/693 dead transitions. [2024-06-14 12:31:50,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 693 transitions, 12033 flow [2024-06-14 12:31:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:31:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:31:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-14 12:31:50,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-14 12:31:50,021 INFO L175 Difference]: Start difference. First operand has 388 places, 656 transitions, 9743 flow. Second operand 11 states and 208 transitions. [2024-06-14 12:31:50,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 693 transitions, 12033 flow [2024-06-14 12:31:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 693 transitions, 11862 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:53,345 INFO L231 Difference]: Finished difference. Result has 395 places, 664 transitions, 10181 flow [2024-06-14 12:31:53,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10181, PETRI_PLACES=395, PETRI_TRANSITIONS=664} [2024-06-14 12:31:53,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 12:31:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 664 transitions, 10181 flow [2024-06-14 12:31:53,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:53,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:53,346 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 12:31:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:31:53,346 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 12:31:53,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1474825712, now seen corresponding path program 4 times [2024-06-14 12:31:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400201835] [2024-06-14 12:31:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:54,253 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 12:31:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:54,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400201835] [2024-06-14 12:31:54,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400201835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:54,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:54,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:31:54,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430103574] [2024-06-14 12:31:54,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:54,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:31:54,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:31:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:31:54,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:54,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 664 transitions, 10181 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:54,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:54,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:56,179 INFO L124 PetriNetUnfolderBase]: 3978/6280 cut-off events. [2024-06-14 12:31:56,179 INFO L125 PetriNetUnfolderBase]: For 1264469/1264471 co-relation queries the response was YES. [2024-06-14 12:31:56,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71288 conditions, 6280 events. 3978/6280 cut-off events. For 1264469/1264471 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37988 event pairs, 768 based on Foata normal form. 5/6284 useless extension candidates. Maximal degree in co-relation 71101. Up to 5197 conditions per place. [2024-06-14 12:31:56,272 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 550 selfloop transitions, 138 changer transitions 0/693 dead transitions. [2024-06-14 12:31:56,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 693 transitions, 12149 flow [2024-06-14 12:31:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:31:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:31:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-14 12:31:56,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-14 12:31:56,274 INFO L175 Difference]: Start difference. First operand has 395 places, 664 transitions, 10181 flow. Second operand 11 states and 207 transitions. [2024-06-14 12:31:56,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 693 transitions, 12149 flow [2024-06-14 12:31:59,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 693 transitions, 11643 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-06-14 12:31:59,849 INFO L231 Difference]: Finished difference. Result has 399 places, 664 transitions, 9959 flow [2024-06-14 12:31:59,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9959, PETRI_PLACES=399, PETRI_TRANSITIONS=664} [2024-06-14 12:31:59,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 12:31:59,849 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 664 transitions, 9959 flow [2024-06-14 12:31:59,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:59,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:59,850 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 12:31:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:31:59,850 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 12:31:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1474437902, now seen corresponding path program 5 times [2024-06-14 12:31:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063088183] [2024-06-14 12:31:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:00,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063088183] [2024-06-14 12:32:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063088183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:00,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:00,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:32:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372860092] [2024-06-14 12:32:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:32:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:32:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:32:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:00,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 664 transitions, 9959 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:00,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:00,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:02,570 INFO L124 PetriNetUnfolderBase]: 3969/6268 cut-off events. [2024-06-14 12:32:02,570 INFO L125 PetriNetUnfolderBase]: For 1261028/1261030 co-relation queries the response was YES. [2024-06-14 12:32:02,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70569 conditions, 6268 events. 3969/6268 cut-off events. For 1261028/1261030 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37888 event pairs, 776 based on Foata normal form. 5/6272 useless extension candidates. Maximal degree in co-relation 70381. Up to 5190 conditions per place. [2024-06-14 12:32:02,672 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 549 selfloop transitions, 138 changer transitions 0/692 dead transitions. [2024-06-14 12:32:02,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 692 transitions, 11697 flow [2024-06-14 12:32:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:32:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:32:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-14 12:32:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-14 12:32:02,673 INFO L175 Difference]: Start difference. First operand has 399 places, 664 transitions, 9959 flow. Second operand 11 states and 208 transitions. [2024-06-14 12:32:02,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 692 transitions, 11697 flow [2024-06-14 12:32:06,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 692 transitions, 11312 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:06,553 INFO L231 Difference]: Finished difference. Result has 402 places, 664 transitions, 9857 flow [2024-06-14 12:32:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9574, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9857, PETRI_PLACES=402, PETRI_TRANSITIONS=664} [2024-06-14 12:32:06,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 12:32:06,554 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 664 transitions, 9857 flow [2024-06-14 12:32:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:06,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:06,554 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 12:32:06,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:32:06,554 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 12:32:06,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 838617962, now seen corresponding path program 5 times [2024-06-14 12:32:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345729006] [2024-06-14 12:32:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:07,478 INFO 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 12:32:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345729006] [2024-06-14 12:32:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345729006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:07,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262978396] [2024-06-14 12:32:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:07,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:07,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:07,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:07,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:07,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:32:07,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 664 transitions, 9857 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:07,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:07,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:32:07,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:09,259 INFO L124 PetriNetUnfolderBase]: 3758/6038 cut-off events. [2024-06-14 12:32:09,260 INFO L125 PetriNetUnfolderBase]: For 1262779/1262797 co-relation queries the response was YES. [2024-06-14 12:32:09,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68695 conditions, 6038 events. 3758/6038 cut-off events. For 1262779/1262797 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37482 event pairs, 860 based on Foata normal form. 18/6029 useless extension candidates. Maximal degree in co-relation 68506. Up to 4956 conditions per place. [2024-06-14 12:32:09,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 518 selfloop transitions, 124 changer transitions 0/690 dead transitions. [2024-06-14 12:32:09,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 690 transitions, 11239 flow [2024-06-14 12:32:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:32:09,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 12:32:09,358 INFO L175 Difference]: Start difference. First operand has 402 places, 664 transitions, 9857 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:32:09,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 690 transitions, 11239 flow [2024-06-14 12:32:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 690 transitions, 10914 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:13,273 INFO L231 Difference]: Finished difference. Result has 404 places, 664 transitions, 9801 flow [2024-06-14 12:32:13,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9801, PETRI_PLACES=404, PETRI_TRANSITIONS=664} [2024-06-14 12:32:13,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-14 12:32:13,274 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 664 transitions, 9801 flow [2024-06-14 12:32:13,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:13,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:13,274 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 12:32:13,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:32:13,274 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 12:32:13,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:13,275 INFO L85 PathProgramCache]: Analyzing trace with hash 856422858, now seen corresponding path program 2 times [2024-06-14 12:32:13,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:13,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276430603] [2024-06-14 12:32:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:14,334 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 12:32:14,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:14,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276430603] [2024-06-14 12:32:14,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276430603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:14,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:14,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447657953] [2024-06-14 12:32:14,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:14,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:14,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 664 transitions, 9801 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:14,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:14,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:16,207 INFO L124 PetriNetUnfolderBase]: 3973/6241 cut-off events. [2024-06-14 12:32:16,208 INFO L125 PetriNetUnfolderBase]: For 1278370/1278372 co-relation queries the response was YES. [2024-06-14 12:32:16,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70478 conditions, 6241 events. 3973/6241 cut-off events. For 1278370/1278372 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37383 event pairs, 860 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 70288. Up to 5477 conditions per place. [2024-06-14 12:32:16,315 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 556 selfloop transitions, 131 changer transitions 0/692 dead transitions. [2024-06-14 12:32:16,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 692 transitions, 11428 flow [2024-06-14 12:32:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:32:16,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:32:16,317 INFO L175 Difference]: Start difference. First operand has 404 places, 664 transitions, 9801 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:32:16,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 692 transitions, 11428 flow [2024-06-14 12:32:20,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 692 transitions, 11116 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:20,431 INFO L231 Difference]: Finished difference. Result has 407 places, 668 transitions, 9941 flow [2024-06-14 12:32:20,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9489, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=407, PETRI_TRANSITIONS=668} [2024-06-14 12:32:20,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-14 12:32:20,432 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 668 transitions, 9941 flow [2024-06-14 12:32:20,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:20,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:20,432 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 12:32:20,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:32:20,432 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 12:32:20,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 848004111, now seen corresponding path program 5 times [2024-06-14 12:32:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:20,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712930084] [2024-06-14 12:32:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:21,257 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 12:32:21,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712930084] [2024-06-14 12:32:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712930084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:21,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:21,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:21,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424533939] [2024-06-14 12:32:21,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:21,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:21,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:21,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:21,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:21,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:21,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 668 transitions, 9941 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:21,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:21,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:21,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:23,102 INFO L124 PetriNetUnfolderBase]: 3997/6291 cut-off events. [2024-06-14 12:32:23,102 INFO L125 PetriNetUnfolderBase]: For 1314163/1314165 co-relation queries the response was YES. [2024-06-14 12:32:23,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71192 conditions, 6291 events. 3997/6291 cut-off events. For 1314163/1314165 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37870 event pairs, 804 based on Foata normal form. 10/6300 useless extension candidates. Maximal degree in co-relation 71001. Up to 5605 conditions per place. [2024-06-14 12:32:23,204 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 607 selfloop transitions, 86 changer transitions 0/698 dead transitions. [2024-06-14 12:32:23,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 698 transitions, 11675 flow [2024-06-14 12:32:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:32:23,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:32:23,206 INFO L175 Difference]: Start difference. First operand has 407 places, 668 transitions, 9941 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:32:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 698 transitions, 11675 flow [2024-06-14 12:32:27,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 698 transitions, 11273 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-14 12:32:27,082 INFO L231 Difference]: Finished difference. Result has 409 places, 675 transitions, 9980 flow [2024-06-14 12:32:27,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9539, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9980, PETRI_PLACES=409, PETRI_TRANSITIONS=675} [2024-06-14 12:32:27,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:32:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 675 transitions, 9980 flow [2024-06-14 12:32:27,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:27,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:27,083 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 12:32:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:32:27,083 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 12:32:27,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2056257549, now seen corresponding path program 6 times [2024-06-14 12:32:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640335552] [2024-06-14 12:32:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:27,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:27,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640335552] [2024-06-14 12:32:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640335552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:27,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564850174] [2024-06-14 12:32:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:27,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:27,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:28,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:28,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 675 transitions, 9980 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:29,815 INFO L124 PetriNetUnfolderBase]: 4033/6387 cut-off events. [2024-06-14 12:32:29,816 INFO L125 PetriNetUnfolderBase]: For 1323274/1323276 co-relation queries the response was YES. [2024-06-14 12:32:29,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72074 conditions, 6387 events. 4033/6387 cut-off events. For 1323274/1323276 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38955 event pairs, 815 based on Foata normal form. 6/6392 useless extension candidates. Maximal degree in co-relation 71882. Up to 5103 conditions per place. [2024-06-14 12:32:29,917 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 516 selfloop transitions, 183 changer transitions 0/704 dead transitions. [2024-06-14 12:32:29,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 704 transitions, 12189 flow [2024-06-14 12:32:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:32:29,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:32:29,919 INFO L175 Difference]: Start difference. First operand has 409 places, 675 transitions, 9980 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:32:29,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 704 transitions, 12189 flow [2024-06-14 12:32:34,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 704 transitions, 11893 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:34,030 INFO L231 Difference]: Finished difference. Result has 412 places, 682 transitions, 10303 flow [2024-06-14 12:32:34,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9702, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10303, PETRI_PLACES=412, PETRI_TRANSITIONS=682} [2024-06-14 12:32:34,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 12:32:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 682 transitions, 10303 flow [2024-06-14 12:32:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:34,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:34,031 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 12:32:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:32:34,031 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 12:32:34,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1552849915, now seen corresponding path program 7 times [2024-06-14 12:32:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857167315] [2024-06-14 12:32:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:34,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857167315] [2024-06-14 12:32:34,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857167315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:34,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:34,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:34,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828691628] [2024-06-14 12:32:34,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:34,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:34,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:35,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:35,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 682 transitions, 10303 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:35,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:35,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:36,765 INFO L124 PetriNetUnfolderBase]: 4053/6405 cut-off events. [2024-06-14 12:32:36,765 INFO L125 PetriNetUnfolderBase]: For 1324149/1324151 co-relation queries the response was YES. [2024-06-14 12:32:36,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72535 conditions, 6405 events. 4053/6405 cut-off events. For 1324149/1324151 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38955 event pairs, 746 based on Foata normal form. 6/6410 useless extension candidates. Maximal degree in co-relation 72342. Up to 5119 conditions per place. [2024-06-14 12:32:36,867 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 186 changer transitions 0/708 dead transitions. [2024-06-14 12:32:36,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 708 transitions, 12416 flow [2024-06-14 12:32:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:32:36,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:32:36,868 INFO L175 Difference]: Start difference. First operand has 412 places, 682 transitions, 10303 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:32:36,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 708 transitions, 12416 flow [2024-06-14 12:32:40,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 708 transitions, 12157 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:32:40,959 INFO L231 Difference]: Finished difference. Result has 416 places, 686 transitions, 10559 flow [2024-06-14 12:32:40,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10559, PETRI_PLACES=416, PETRI_TRANSITIONS=686} [2024-06-14 12:32:40,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 12:32:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 686 transitions, 10559 flow [2024-06-14 12:32:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:40,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:40,960 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 12:32:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:32:40,960 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 12:32:40,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1552583005, now seen corresponding path program 8 times [2024-06-14 12:32:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288181400] [2024-06-14 12:32:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:41,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288181400] [2024-06-14 12:32:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288181400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:41,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249136833] [2024-06-14 12:32:41,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:41,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:41,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:41,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:41,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 686 transitions, 10559 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:41,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:41,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:41,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:43,629 INFO L124 PetriNetUnfolderBase]: 4041/6389 cut-off events. [2024-06-14 12:32:43,629 INFO L125 PetriNetUnfolderBase]: For 1316919/1316921 co-relation queries the response was YES. [2024-06-14 12:32:43,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72090 conditions, 6389 events. 4041/6389 cut-off events. For 1316919/1316921 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38849 event pairs, 744 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 71896. Up to 5111 conditions per place. [2024-06-14 12:32:43,735 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 513 selfloop transitions, 189 changer transitions 0/707 dead transitions. [2024-06-14 12:32:43,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 707 transitions, 12303 flow [2024-06-14 12:32:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:32:43,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:32:43,737 INFO L175 Difference]: Start difference. First operand has 416 places, 686 transitions, 10559 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:32:43,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 707 transitions, 12303 flow [2024-06-14 12:32:47,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 707 transitions, 11894 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-14 12:32:47,999 INFO L231 Difference]: Finished difference. Result has 418 places, 686 transitions, 10550 flow [2024-06-14 12:32:48,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10550, PETRI_PLACES=418, PETRI_TRANSITIONS=686} [2024-06-14 12:32:48,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 12:32:48,000 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 686 transitions, 10550 flow [2024-06-14 12:32:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:48,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:48,000 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 12:32:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:32:48,000 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 12:32:48,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:48,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1551742252, now seen corresponding path program 6 times [2024-06-14 12:32:48,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:48,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109098012] [2024-06-14 12:32:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109098012] [2024-06-14 12:32:48,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109098012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:48,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:48,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:32:48,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376210124] [2024-06-14 12:32:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:32:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:32:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:32:49,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:49,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 686 transitions, 10550 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:49,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:49,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:49,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:50,822 INFO L124 PetriNetUnfolderBase]: 4112/6482 cut-off events. [2024-06-14 12:32:50,822 INFO L125 PetriNetUnfolderBase]: For 1367488/1367490 co-relation queries the response was YES. [2024-06-14 12:32:50,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74314 conditions, 6482 events. 4112/6482 cut-off events. For 1367488/1367490 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39306 event pairs, 816 based on Foata normal form. 5/6486 useless extension candidates. Maximal degree in co-relation 74120. Up to 4956 conditions per place. [2024-06-14 12:32:50,926 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 219 changer transitions 0/722 dead transitions. [2024-06-14 12:32:50,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 722 transitions, 13136 flow [2024-06-14 12:32:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:32:50,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:32:50,927 INFO L175 Difference]: Start difference. First operand has 418 places, 686 transitions, 10550 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:32:50,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 722 transitions, 13136 flow [2024-06-14 12:32:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 722 transitions, 12807 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:32:55,296 INFO L231 Difference]: Finished difference. Result has 421 places, 698 transitions, 11384 flow [2024-06-14 12:32:55,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10225, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11384, PETRI_PLACES=421, PETRI_TRANSITIONS=698} [2024-06-14 12:32:55,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 12:32:55,296 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 698 transitions, 11384 flow [2024-06-14 12:32:55,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:55,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:55,296 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 12:32:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:32:55,297 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 12:32:55,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1562467012, now seen corresponding path program 7 times [2024-06-14 12:32:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126721810] [2024-06-14 12:32:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:56,212 INFO 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 12:32:56,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:56,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126721810] [2024-06-14 12:32:56,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126721810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:56,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:56,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:32:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704204449] [2024-06-14 12:32:56,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:56,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:32:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:32:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:32:56,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:56,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 698 transitions, 11384 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:56,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:56,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:56,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:58,136 INFO L124 PetriNetUnfolderBase]: 4127/6493 cut-off events. [2024-06-14 12:32:58,136 INFO L125 PetriNetUnfolderBase]: For 1382682/1382684 co-relation queries the response was YES. [2024-06-14 12:32:58,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75823 conditions, 6493 events. 4127/6493 cut-off events. For 1382682/1382684 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39306 event pairs, 746 based on Foata normal form. 5/6497 useless extension candidates. Maximal degree in co-relation 75628. Up to 4970 conditions per place. [2024-06-14 12:32:58,242 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 217 changer transitions 0/726 dead transitions. [2024-06-14 12:32:58,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 726 transitions, 13627 flow [2024-06-14 12:32:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:58,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:32:58,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 12:32:58,243 INFO L175 Difference]: Start difference. First operand has 421 places, 698 transitions, 11384 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:32:58,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 726 transitions, 13627 flow [2024-06-14 12:33:03,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 726 transitions, 13278 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:03,380 INFO L231 Difference]: Finished difference. Result has 425 places, 702 transitions, 11690 flow [2024-06-14 12:33:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11067, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11690, PETRI_PLACES=425, PETRI_TRANSITIONS=702} [2024-06-14 12:33:03,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-14 12:33:03,381 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 702 transitions, 11690 flow [2024-06-14 12:33:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:03,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:03,381 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 12:33:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:33:03,381 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 12:33:03,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash 743964220, now seen corresponding path program 8 times [2024-06-14 12:33:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:03,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078771458] [2024-06-14 12:33:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:03,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:04,300 INFO 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 12:33:04,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:04,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078771458] [2024-06-14 12:33:04,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078771458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:04,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:04,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:33:04,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534937030] [2024-06-14 12:33:04,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:04,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:33:04,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:33:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:33:04,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:04,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 702 transitions, 11690 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:04,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:04,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:04,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:06,229 INFO L124 PetriNetUnfolderBase]: 4146/6526 cut-off events. [2024-06-14 12:33:06,229 INFO L125 PetriNetUnfolderBase]: For 1368622/1368624 co-relation queries the response was YES. [2024-06-14 12:33:06,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76051 conditions, 6526 events. 4146/6526 cut-off events. For 1368622/1368624 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39543 event pairs, 738 based on Foata normal form. 5/6530 useless extension candidates. Maximal degree in co-relation 75855. Up to 4989 conditions per place. [2024-06-14 12:33:06,339 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 506 selfloop transitions, 219 changer transitions 0/730 dead transitions. [2024-06-14 12:33:06,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 730 transitions, 13921 flow [2024-06-14 12:33:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:33:06,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 12:33:06,340 INFO L175 Difference]: Start difference. First operand has 425 places, 702 transitions, 11690 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:33:06,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 730 transitions, 13921 flow [2024-06-14 12:33:10,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 730 transitions, 13410 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:10,944 INFO L231 Difference]: Finished difference. Result has 427 places, 706 transitions, 11818 flow [2024-06-14 12:33:10,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11194, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11818, PETRI_PLACES=427, PETRI_TRANSITIONS=706} [2024-06-14 12:33:10,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 12:33:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 706 transitions, 11818 flow [2024-06-14 12:33:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:10,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:10,945 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 12:33:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:33:10,945 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 12:33:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash 743977240, now seen corresponding path program 9 times [2024-06-14 12:33:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967042418] [2024-06-14 12:33:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:11,865 INFO 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 12:33:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967042418] [2024-06-14 12:33:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967042418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:11,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:33:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936808826] [2024-06-14 12:33:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:33:11,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:33:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:33:12,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:12,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 706 transitions, 11818 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:12,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:12,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:13,954 INFO L124 PetriNetUnfolderBase]: 4141/6522 cut-off events. [2024-06-14 12:33:13,954 INFO L125 PetriNetUnfolderBase]: For 1345989/1345991 co-relation queries the response was YES. [2024-06-14 12:33:14,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75517 conditions, 6522 events. 4141/6522 cut-off events. For 1345989/1345991 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39523 event pairs, 738 based on Foata normal form. 5/6526 useless extension candidates. Maximal degree in co-relation 75321. Up to 4987 conditions per place. [2024-06-14 12:33:14,068 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 221 changer transitions 0/730 dead transitions. [2024-06-14 12:33:14,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 730 transitions, 13864 flow [2024-06-14 12:33:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:33:14,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 12:33:14,070 INFO L175 Difference]: Start difference. First operand has 427 places, 706 transitions, 11818 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:33:14,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 730 transitions, 13864 flow [2024-06-14 12:33:18,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 730 transitions, 13206 flow, removed 149 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:18,777 INFO L231 Difference]: Finished difference. Result has 429 places, 706 transitions, 11620 flow [2024-06-14 12:33:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11164, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=429, PETRI_TRANSITIONS=706} [2024-06-14 12:33:18,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 12:33:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 706 transitions, 11620 flow [2024-06-14 12:33:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:18,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:18,778 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 12:33:18,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:33:18,779 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 12:33:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2063886029, now seen corresponding path program 2 times [2024-06-14 12:33:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464896600] [2024-06-14 12:33:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:19,957 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 12:33:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464896600] [2024-06-14 12:33:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464896600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:19,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:19,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:33:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738726055] [2024-06-14 12:33:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:19,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:33:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:33:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:33:20,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:20,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 706 transitions, 11620 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:21,863 INFO L124 PetriNetUnfolderBase]: 4146/6520 cut-off events. [2024-06-14 12:33:21,863 INFO L125 PetriNetUnfolderBase]: For 1327773/1327783 co-relation queries the response was YES. [2024-06-14 12:33:21,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75309 conditions, 6520 events. 4146/6520 cut-off events. For 1327773/1327783 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 39495 event pairs, 1130 based on Foata normal form. 11/6530 useless extension candidates. Maximal degree in co-relation 75113. Up to 6070 conditions per place. [2024-06-14 12:33:21,978 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 678 selfloop transitions, 43 changer transitions 0/726 dead transitions. [2024-06-14 12:33:21,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 726 transitions, 13252 flow [2024-06-14 12:33:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:33:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:33:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:33:21,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 12:33:21,979 INFO L175 Difference]: Start difference. First operand has 429 places, 706 transitions, 11620 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:33:21,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 726 transitions, 13252 flow [2024-06-14 12:33:26,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 726 transitions, 12682 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 12:33:26,344 INFO L231 Difference]: Finished difference. Result has 429 places, 709 transitions, 11296 flow [2024-06-14 12:33:26,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11050, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11296, PETRI_PLACES=429, PETRI_TRANSITIONS=709} [2024-06-14 12:33:26,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 12:33:26,345 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 709 transitions, 11296 flow [2024-06-14 12:33:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:26,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:26,345 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 12:33:26,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:33:26,346 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 12:33:26,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1115903078, now seen corresponding path program 7 times [2024-06-14 12:33:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757357228] [2024-06-14 12:33:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:27,264 INFO 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 12:33:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757357228] [2024-06-14 12:33:27,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757357228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:27,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:27,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310434383] [2024-06-14 12:33:27,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:27,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:27,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 709 transitions, 11296 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:27,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:27,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:27,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:29,149 INFO L124 PetriNetUnfolderBase]: 4190/6663 cut-off events. [2024-06-14 12:33:29,149 INFO L125 PetriNetUnfolderBase]: For 1421427/1421429 co-relation queries the response was YES. [2024-06-14 12:33:29,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75051 conditions, 6663 events. 4190/6663 cut-off events. For 1421427/1421429 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41340 event pairs, 806 based on Foata normal form. 14/6674 useless extension candidates. Maximal degree in co-relation 74856. Up to 5349 conditions per place. [2024-06-14 12:33:29,267 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 555 selfloop transitions, 171 changer transitions 0/731 dead transitions. [2024-06-14 12:33:29,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 731 transitions, 13060 flow [2024-06-14 12:33:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:33:29,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:33:29,268 INFO L175 Difference]: Start difference. First operand has 429 places, 709 transitions, 11296 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:33:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 731 transitions, 13060 flow [2024-06-14 12:33:33,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 731 transitions, 12850 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:33,305 INFO L231 Difference]: Finished difference. Result has 430 places, 711 transitions, 11556 flow [2024-06-14 12:33:33,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11086, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11556, PETRI_PLACES=430, PETRI_TRANSITIONS=711} [2024-06-14 12:33:33,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-14 12:33:33,306 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 711 transitions, 11556 flow [2024-06-14 12:33:33,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:33,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:33,306 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 12:33:33,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:33:33,306 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 12:33:33,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:33,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1651354536, now seen corresponding path program 8 times [2024-06-14 12:33:33,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:33,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375311598] [2024-06-14 12:33:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:33,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:34,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375311598] [2024-06-14 12:33:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375311598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:34,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181060116] [2024-06-14 12:33:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:34,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:34,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 711 transitions, 11556 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:34,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:34,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:34,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:36,131 INFO L124 PetriNetUnfolderBase]: 4234/6737 cut-off events. [2024-06-14 12:33:36,131 INFO L125 PetriNetUnfolderBase]: For 1450906/1450908 co-relation queries the response was YES. [2024-06-14 12:33:36,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76715 conditions, 6737 events. 4234/6737 cut-off events. For 1450906/1450908 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41899 event pairs, 818 based on Foata normal form. 14/6748 useless extension candidates. Maximal degree in co-relation 76519. Up to 5417 conditions per place. [2024-06-14 12:33:36,249 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 179 changer transitions 0/733 dead transitions. [2024-06-14 12:33:36,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 733 transitions, 13328 flow [2024-06-14 12:33:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:33:36,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:33:36,251 INFO L175 Difference]: Start difference. First operand has 430 places, 711 transitions, 11556 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:33:36,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 733 transitions, 13328 flow [2024-06-14 12:33:40,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 733 transitions, 12902 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:40,540 INFO L231 Difference]: Finished difference. Result has 432 places, 713 transitions, 11620 flow [2024-06-14 12:33:40,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11620, PETRI_PLACES=432, PETRI_TRANSITIONS=713} [2024-06-14 12:33:40,540 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 12:33:40,541 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 713 transitions, 11620 flow [2024-06-14 12:33:40,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:40,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:40,541 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 12:33:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:33:40,541 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 12:33:40,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1651680966, now seen corresponding path program 9 times [2024-06-14 12:33:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:40,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36813350] [2024-06-14 12:33:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:41,459 INFO 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 12:33:41,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:41,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36813350] [2024-06-14 12:33:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36813350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:41,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:41,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117866772] [2024-06-14 12:33:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:41,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 713 transitions, 11620 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:41,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:41,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:41,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:43,401 INFO L124 PetriNetUnfolderBase]: 4337/6884 cut-off events. [2024-06-14 12:33:43,401 INFO L125 PetriNetUnfolderBase]: For 1547328/1547330 co-relation queries the response was YES. [2024-06-14 12:33:43,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79791 conditions, 6884 events. 4337/6884 cut-off events. For 1547328/1547330 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42799 event pairs, 825 based on Foata normal form. 14/6895 useless extension candidates. Maximal degree in co-relation 79594. Up to 5340 conditions per place. [2024-06-14 12:33:43,521 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 551 selfloop transitions, 186 changer transitions 0/742 dead transitions. [2024-06-14 12:33:43,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 742 transitions, 13880 flow [2024-06-14 12:33:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:33:43,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:33:43,522 INFO L175 Difference]: Start difference. First operand has 432 places, 713 transitions, 11620 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:33:43,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 742 transitions, 13880 flow [2024-06-14 12:33:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 742 transitions, 13434 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:48,177 INFO L231 Difference]: Finished difference. Result has 434 places, 717 transitions, 11807 flow [2024-06-14 12:33:48,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11174, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11807, PETRI_PLACES=434, PETRI_TRANSITIONS=717} [2024-06-14 12:33:48,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 12:33:48,178 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 717 transitions, 11807 flow [2024-06-14 12:33:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:48,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:48,178 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 12:33:48,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:33:48,178 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 12:33:48,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1280456586, now seen corresponding path program 10 times [2024-06-14 12:33:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:48,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813526194] [2024-06-14 12:33:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:48,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813526194] [2024-06-14 12:33:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813526194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64036478] [2024-06-14 12:33:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:49,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:49,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 717 transitions, 11807 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:49,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:49,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:49,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:51,009 INFO L124 PetriNetUnfolderBase]: 4309/6886 cut-off events. [2024-06-14 12:33:51,009 INFO L125 PetriNetUnfolderBase]: For 1489307/1489309 co-relation queries the response was YES. [2024-06-14 12:33:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77981 conditions, 6886 events. 4309/6886 cut-off events. For 1489307/1489309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43332 event pairs, 808 based on Foata normal form. 14/6897 useless extension candidates. Maximal degree in co-relation 77783. Up to 5534 conditions per place. [2024-06-14 12:33:51,129 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 548 selfloop transitions, 184 changer transitions 0/737 dead transitions. [2024-06-14 12:33:51,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 737 transitions, 13465 flow [2024-06-14 12:33:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:33:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:33:51,130 INFO L175 Difference]: Start difference. First operand has 434 places, 717 transitions, 11807 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:33:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 737 transitions, 13465 flow [2024-06-14 12:33:55,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 737 transitions, 13063 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:55,801 INFO L231 Difference]: Finished difference. Result has 438 places, 717 transitions, 11779 flow [2024-06-14 12:33:55,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11779, PETRI_PLACES=438, PETRI_TRANSITIONS=717} [2024-06-14 12:33:55,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-14 12:33:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 717 transitions, 11779 flow [2024-06-14 12:33:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:55,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:55,802 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 12:33:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:33:55,803 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 12:33:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1135146090, now seen corresponding path program 6 times [2024-06-14 12:33:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949936604] [2024-06-14 12:33:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:56,807 INFO 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 12:33:56,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:56,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949936604] [2024-06-14 12:33:56,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949936604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:56,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:56,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:56,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342941775] [2024-06-14 12:33:56,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:56,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:56,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:56,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:33:56,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 717 transitions, 11779 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:56,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:56,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:33:56,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:58,651 INFO L124 PetriNetUnfolderBase]: 4055/6518 cut-off events. [2024-06-14 12:33:58,651 INFO L125 PetriNetUnfolderBase]: For 1408557/1408579 co-relation queries the response was YES. [2024-06-14 12:33:58,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75989 conditions, 6518 events. 4055/6518 cut-off events. For 1408557/1408579 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41034 event pairs, 913 based on Foata normal form. 21/6493 useless extension candidates. Maximal degree in co-relation 75789. Up to 5311 conditions per place. [2024-06-14 12:33:58,768 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 140 changer transitions 0/742 dead transitions. [2024-06-14 12:33:58,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 742 transitions, 13388 flow [2024-06-14 12:33:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-14 12:33:58,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 12:33:58,770 INFO L175 Difference]: Start difference. First operand has 438 places, 717 transitions, 11779 flow. Second operand 7 states and 147 transitions. [2024-06-14 12:33:58,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 742 transitions, 13388 flow [2024-06-14 12:34:03,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 742 transitions, 12998 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:34:03,753 INFO L231 Difference]: Finished difference. Result has 437 places, 720 transitions, 11865 flow [2024-06-14 12:34:03,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11865, PETRI_PLACES=437, PETRI_TRANSITIONS=720} [2024-06-14 12:34:03,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 12:34:03,754 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 720 transitions, 11865 flow [2024-06-14 12:34:03,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:03,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:03,754 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 12:34:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:34:03,754 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 12:34:03,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1320468618, now seen corresponding path program 3 times [2024-06-14 12:34:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386137326] [2024-06-14 12:34:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:04,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:04,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386137326] [2024-06-14 12:34:04,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386137326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:04,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:04,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85093519] [2024-06-14 12:34:04,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:04,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:04,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:04,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:04,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 720 transitions, 11865 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:04,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:04,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:04,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:06,698 INFO L124 PetriNetUnfolderBase]: 4319/6763 cut-off events. [2024-06-14 12:34:06,698 INFO L125 PetriNetUnfolderBase]: For 1429231/1429231 co-relation queries the response was YES. [2024-06-14 12:34:06,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78646 conditions, 6763 events. 4319/6763 cut-off events. For 1429231/1429231 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40875 event pairs, 935 based on Foata normal form. 1/6758 useless extension candidates. Maximal degree in co-relation 78445. Up to 6027 conditions per place. [2024-06-14 12:34:06,819 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 621 selfloop transitions, 119 changer transitions 0/745 dead transitions. [2024-06-14 12:34:06,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 745 transitions, 13577 flow [2024-06-14 12:34:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:34:06,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:34:06,820 INFO L175 Difference]: Start difference. First operand has 437 places, 720 transitions, 11865 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:34:06,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 745 transitions, 13577 flow [2024-06-14 12:34:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 745 transitions, 13238 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:11,582 INFO L231 Difference]: Finished difference. Result has 440 places, 723 transitions, 11926 flow [2024-06-14 12:34:11,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11526, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=440, PETRI_TRANSITIONS=723} [2024-06-14 12:34:11,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 12:34:11,583 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 723 transitions, 11926 flow [2024-06-14 12:34:11,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:11,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:11,583 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 12:34:11,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:34:11,584 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 12:34:11,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1890207754, now seen corresponding path program 7 times [2024-06-14 12:34:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353074331] [2024-06-14 12:34:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353074331] [2024-06-14 12:34:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353074331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:12,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310725774] [2024-06-14 12:34:12,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:12,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:12,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:12,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:12,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:34:12,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 723 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:12,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:12,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:34:12,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:14,492 INFO L124 PetriNetUnfolderBase]: 4070/6549 cut-off events. [2024-06-14 12:34:14,493 INFO L125 PetriNetUnfolderBase]: For 1460333/1460381 co-relation queries the response was YES. [2024-06-14 12:34:14,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76773 conditions, 6549 events. 4070/6549 cut-off events. For 1460333/1460381 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41371 event pairs, 831 based on Foata normal form. 35/6483 useless extension candidates. Maximal degree in co-relation 76572. Up to 5141 conditions per place. [2024-06-14 12:34:14,609 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 197 changer transitions 0/742 dead transitions. [2024-06-14 12:34:14,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 742 transitions, 13518 flow [2024-06-14 12:34:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:34:14,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-14 12:34:14,610 INFO L175 Difference]: Start difference. First operand has 440 places, 723 transitions, 11926 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:34:14,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 742 transitions, 13518 flow [2024-06-14 12:34:18,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 742 transitions, 13140 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:18,912 INFO L231 Difference]: Finished difference. Result has 440 places, 726 transitions, 12134 flow [2024-06-14 12:34:18,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11548, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12134, PETRI_PLACES=440, PETRI_TRANSITIONS=726} [2024-06-14 12:34:18,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 12:34:18,913 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 726 transitions, 12134 flow [2024-06-14 12:34:18,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:18,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:18,913 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 12:34:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:34:18,913 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 12:34:18,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1674731658, now seen corresponding path program 4 times [2024-06-14 12:34:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:18,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382162325] [2024-06-14 12:34:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:20,082 INFO 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 12:34:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382162325] [2024-06-14 12:34:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382162325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:20,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:20,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357305329] [2024-06-14 12:34:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:20,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:20,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:20,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:20,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 726 transitions, 12134 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:20,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:20,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:20,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:21,961 INFO L124 PetriNetUnfolderBase]: 4337/6790 cut-off events. [2024-06-14 12:34:21,961 INFO L125 PetriNetUnfolderBase]: For 1471926/1471926 co-relation queries the response was YES. [2024-06-14 12:34:22,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80259 conditions, 6790 events. 4337/6790 cut-off events. For 1471926/1471926 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41005 event pairs, 935 based on Foata normal form. 1/6785 useless extension candidates. Maximal degree in co-relation 80057. Up to 5974 conditions per place. [2024-06-14 12:34:22,084 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 593 selfloop transitions, 158 changer transitions 0/756 dead transitions. [2024-06-14 12:34:22,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 756 transitions, 14683 flow [2024-06-14 12:34:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:34:22,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:34:22,086 INFO L175 Difference]: Start difference. First operand has 440 places, 726 transitions, 12134 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:34:22,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 756 transitions, 14683 flow [2024-06-14 12:34:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 756 transitions, 14194 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:28,049 INFO L231 Difference]: Finished difference. Result has 443 places, 735 transitions, 12455 flow [2024-06-14 12:34:28,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11653, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12455, PETRI_PLACES=443, PETRI_TRANSITIONS=735} [2024-06-14 12:34:28,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-14 12:34:28,049 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 735 transitions, 12455 flow [2024-06-14 12:34:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:28,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:28,050 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 12:34:28,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:34:28,050 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 12:34:28,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1904007880, now seen corresponding path program 8 times [2024-06-14 12:34:28,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:28,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317591072] [2024-06-14 12:34:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:28,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317591072] [2024-06-14 12:34:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317591072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:29,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082174608] [2024-06-14 12:34:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:29,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:34:29,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 735 transitions, 12455 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:29,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:29,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:34:29,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:31,017 INFO L124 PetriNetUnfolderBase]: 4069/6565 cut-off events. [2024-06-14 12:34:31,017 INFO L125 PetriNetUnfolderBase]: For 1467138/1467186 co-relation queries the response was YES. [2024-06-14 12:34:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77536 conditions, 6565 events. 4069/6565 cut-off events. For 1467138/1467186 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41770 event pairs, 864 based on Foata normal form. 35/6488 useless extension candidates. Maximal degree in co-relation 77334. Up to 5069 conditions per place. [2024-06-14 12:34:31,143 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 481 selfloop transitions, 212 changer transitions 0/750 dead transitions. [2024-06-14 12:34:31,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 750 transitions, 14063 flow [2024-06-14 12:34:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:34:31,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 12:34:31,144 INFO L175 Difference]: Start difference. First operand has 443 places, 735 transitions, 12455 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:34:31,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 750 transitions, 14063 flow [2024-06-14 12:34:36,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 750 transitions, 13622 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:36,339 INFO L231 Difference]: Finished difference. Result has 445 places, 738 transitions, 12614 flow [2024-06-14 12:34:36,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12014, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12614, PETRI_PLACES=445, PETRI_TRANSITIONS=738} [2024-06-14 12:34:36,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-14 12:34:36,340 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 738 transitions, 12614 flow [2024-06-14 12:34:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:36,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:36,340 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 12:34:36,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:34:36,340 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 12:34:36,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1779974070, now seen corresponding path program 5 times [2024-06-14 12:34:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:36,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469659953] [2024-06-14 12:34:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:37,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469659953] [2024-06-14 12:34:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469659953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:37,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:37,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959821463] [2024-06-14 12:34:37,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:37,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:37,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 738 transitions, 12614 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:37,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:37,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:37,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:39,494 INFO L124 PetriNetUnfolderBase]: 4331/6784 cut-off events. [2024-06-14 12:34:39,494 INFO L125 PetriNetUnfolderBase]: For 1463105/1463105 co-relation queries the response was YES. [2024-06-14 12:34:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80434 conditions, 6784 events. 4331/6784 cut-off events. For 1463105/1463105 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41033 event pairs, 933 based on Foata normal form. 1/6779 useless extension candidates. Maximal degree in co-relation 80231. Up to 5967 conditions per place. [2024-06-14 12:34:39,620 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 588 selfloop transitions, 165 changer transitions 0/758 dead transitions. [2024-06-14 12:34:39,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 758 transitions, 14441 flow [2024-06-14 12:34:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:34:39,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:34:39,621 INFO L175 Difference]: Start difference. First operand has 445 places, 738 transitions, 12614 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:34:39,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 758 transitions, 14441 flow [2024-06-14 12:34:44,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 758 transitions, 13793 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:44,327 INFO L231 Difference]: Finished difference. Result has 449 places, 738 transitions, 12302 flow [2024-06-14 12:34:44,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11966, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12302, PETRI_PLACES=449, PETRI_TRANSITIONS=738} [2024-06-14 12:34:44,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-14 12:34:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 738 transitions, 12302 flow [2024-06-14 12:34:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:44,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:44,329 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 12:34:44,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:34:44,329 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 12:34:44,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash -733271606, now seen corresponding path program 6 times [2024-06-14 12:34:44,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:44,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157559247] [2024-06-14 12:34:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:44,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:45,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:45,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157559247] [2024-06-14 12:34:45,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157559247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:45,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:45,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:45,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364212447] [2024-06-14 12:34:45,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:45,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:45,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:45,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 738 transitions, 12302 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:45,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:45,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:47,370 INFO L124 PetriNetUnfolderBase]: 4328/6778 cut-off events. [2024-06-14 12:34:47,370 INFO L125 PetriNetUnfolderBase]: For 1471197/1471197 co-relation queries the response was YES. [2024-06-14 12:34:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80089 conditions, 6778 events. 4328/6778 cut-off events. For 1471197/1471197 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 40967 event pairs, 944 based on Foata normal form. 1/6773 useless extension candidates. Maximal degree in co-relation 79885. Up to 6035 conditions per place. [2024-06-14 12:34:47,490 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 638 selfloop transitions, 118 changer transitions 0/761 dead transitions. [2024-06-14 12:34:47,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 761 transitions, 13913 flow [2024-06-14 12:34:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:34:47,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:34:47,491 INFO L175 Difference]: Start difference. First operand has 449 places, 738 transitions, 12302 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:34:47,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 761 transitions, 13913 flow [2024-06-14 12:34:52,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 761 transitions, 13518 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:52,516 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 12150 flow [2024-06-14 12:34:52,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12150, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-14 12:34:52,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:34:52,517 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 12150 flow [2024-06-14 12:34:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:52,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:52,517 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 12:34:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:34:52,518 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 12:34:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1291774959, now seen corresponding path program 9 times [2024-06-14 12:34:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:52,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922261069] [2024-06-14 12:34:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:53,523 INFO 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 12:34:53,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922261069] [2024-06-14 12:34:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922261069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:53,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:53,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126737031] [2024-06-14 12:34:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:53,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:53,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 12150 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:53,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:53,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:55,390 INFO L124 PetriNetUnfolderBase]: 4300/6739 cut-off events. [2024-06-14 12:34:55,390 INFO L125 PetriNetUnfolderBase]: For 1480531/1480531 co-relation queries the response was YES. [2024-06-14 12:34:55,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79155 conditions, 6739 events. 4300/6739 cut-off events. For 1480531/1480531 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40780 event pairs, 905 based on Foata normal form. 4/6737 useless extension candidates. Maximal degree in co-relation 78950. Up to 6146 conditions per place. [2024-06-14 12:34:55,507 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 685 selfloop transitions, 69 changer transitions 0/759 dead transitions. [2024-06-14 12:34:55,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 759 transitions, 13772 flow [2024-06-14 12:34:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:34:55,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:34:55,509 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 12150 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:34:55,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 759 transitions, 13772 flow [2024-06-14 12:35:01,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 759 transitions, 13370 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-14 12:35:01,019 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 11896 flow [2024-06-14 12:35:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11896, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-14 12:35:01,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:35:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 11896 flow [2024-06-14 12:35:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:01,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:01,020 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 12:35:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:35:01,021 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 12:35:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1662672909, now seen corresponding path program 10 times [2024-06-14 12:35:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:01,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870730022] [2024-06-14 12:35:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:01,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870730022] [2024-06-14 12:35:01,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870730022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:01,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:01,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815851140] [2024-06-14 12:35:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:01,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 11896 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:01,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:03,717 INFO L124 PetriNetUnfolderBase]: 4342/6826 cut-off events. [2024-06-14 12:35:03,717 INFO L125 PetriNetUnfolderBase]: For 1519494/1519494 co-relation queries the response was YES. [2024-06-14 12:35:03,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80197 conditions, 6826 events. 4342/6826 cut-off events. For 1519494/1519494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41655 event pairs, 869 based on Foata normal form. 2/6822 useless extension candidates. Maximal degree in co-relation 79991. Up to 5992 conditions per place. [2024-06-14 12:35:03,843 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 644 selfloop transitions, 119 changer transitions 0/768 dead transitions. [2024-06-14 12:35:03,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 14072 flow [2024-06-14 12:35:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:35:03,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:35:03,845 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 11896 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:35:03,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 14072 flow [2024-06-14 12:35:10,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 768 transitions, 13271 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-14 12:35:10,114 INFO L231 Difference]: Finished difference. Result has 451 places, 748 transitions, 11717 flow [2024-06-14 12:35:10,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11095, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11717, PETRI_PLACES=451, PETRI_TRANSITIONS=748} [2024-06-14 12:35:10,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:35:10,115 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 748 transitions, 11717 flow [2024-06-14 12:35:10,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:10,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:10,115 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 12:35:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:35:10,115 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 12:35:10,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1675559919, now seen corresponding path program 11 times [2024-06-14 12:35:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599963515] [2024-06-14 12:35:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599963515] [2024-06-14 12:35:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599963515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:10,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31003860] [2024-06-14 12:35:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:10,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:11,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:11,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 748 transitions, 11717 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:11,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:11,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:11,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:12,969 INFO L124 PetriNetUnfolderBase]: 4336/6832 cut-off events. [2024-06-14 12:35:12,969 INFO L125 PetriNetUnfolderBase]: For 1516984/1516984 co-relation queries the response was YES. [2024-06-14 12:35:13,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79927 conditions, 6832 events. 4336/6832 cut-off events. For 1516984/1516984 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41817 event pairs, 854 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 79718. Up to 5987 conditions per place. [2024-06-14 12:35:13,099 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 639 selfloop transitions, 124 changer transitions 0/768 dead transitions. [2024-06-14 12:35:13,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 13611 flow [2024-06-14 12:35:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:35:13,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:35:13,100 INFO L175 Difference]: Start difference. First operand has 451 places, 748 transitions, 11717 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:35:13,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 13611 flow [2024-06-14 12:35:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 768 transitions, 13371 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:20,161 INFO L231 Difference]: Finished difference. Result has 455 places, 748 transitions, 11733 flow [2024-06-14 12:35:20,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11479, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11733, PETRI_PLACES=455, PETRI_TRANSITIONS=748} [2024-06-14 12:35:20,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-14 12:35:20,162 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 748 transitions, 11733 flow [2024-06-14 12:35:20,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:20,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:20,162 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 12:35:20,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:35:20,162 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 12:35:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1676005389, now seen corresponding path program 12 times [2024-06-14 12:35:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:20,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855769544] [2024-06-14 12:35:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:20,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855769544] [2024-06-14 12:35:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855769544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:21,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:21,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:21,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395797087] [2024-06-14 12:35:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:21,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:21,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 748 transitions, 11733 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:21,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:21,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:21,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:23,423 INFO L124 PetriNetUnfolderBase]: 4330/6824 cut-off events. [2024-06-14 12:35:23,424 INFO L125 PetriNetUnfolderBase]: For 1500528/1500528 co-relation queries the response was YES. [2024-06-14 12:35:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79530 conditions, 6824 events. 4330/6824 cut-off events. For 1500528/1500528 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41751 event pairs, 839 based on Foata normal form. 2/6820 useless extension candidates. Maximal degree in co-relation 79320. Up to 5982 conditions per place. [2024-06-14 12:35:23,550 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 632 selfloop transitions, 130 changer transitions 0/767 dead transitions. [2024-06-14 12:35:23,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 767 transitions, 13365 flow [2024-06-14 12:35:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:23,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:35:23,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:35:23,551 INFO L175 Difference]: Start difference. First operand has 455 places, 748 transitions, 11733 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:35:23,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 767 transitions, 13365 flow [2024-06-14 12:35:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 767 transitions, 13040 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:31,723 INFO L231 Difference]: Finished difference. Result has 457 places, 748 transitions, 11674 flow [2024-06-14 12:35:31,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11408, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11674, PETRI_PLACES=457, PETRI_TRANSITIONS=748} [2024-06-14 12:35:31,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 12:35:31,724 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 748 transitions, 11674 flow [2024-06-14 12:35:31,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:31,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:31,724 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 12:35:31,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:35:31,725 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 12:35:31,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1115779729, now seen corresponding path program 13 times [2024-06-14 12:35:31,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:31,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485463081] [2024-06-14 12:35:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:31,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:32,687 INFO 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 12:35:32,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485463081] [2024-06-14 12:35:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485463081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:32,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:32,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401284437] [2024-06-14 12:35:32,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:32,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:32,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:32,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 748 transitions, 11674 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:32,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:32,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:32,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:35,184 INFO L124 PetriNetUnfolderBase]: 4382/6935 cut-off events. [2024-06-14 12:35:35,185 INFO L125 PetriNetUnfolderBase]: For 1574339/1574341 co-relation queries the response was YES. [2024-06-14 12:35:35,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 6935 events. 4382/6935 cut-off events. For 1574339/1574341 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42800 event pairs, 839 based on Foata normal form. 6/6935 useless extension candidates. Maximal degree in co-relation 80723. Up to 5096 conditions per place. [2024-06-14 12:35:35,308 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 519 selfloop transitions, 251 changer transitions 0/775 dead transitions. [2024-06-14 12:35:35,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 775 transitions, 14332 flow [2024-06-14 12:35:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:35:35,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:35:35,309 INFO L175 Difference]: Start difference. First operand has 457 places, 748 transitions, 11674 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:35:35,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 775 transitions, 14332 flow [2024-06-14 12:35:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 775 transitions, 14103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:42,329 INFO L231 Difference]: Finished difference. Result has 459 places, 756 transitions, 12190 flow [2024-06-14 12:35:42,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12190, PETRI_PLACES=459, PETRI_TRANSITIONS=756} [2024-06-14 12:35:42,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 12:35:42,330 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 756 transitions, 12190 flow [2024-06-14 12:35:42,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:42,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:42,330 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 12:35:42,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:35:42,330 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 12:35:42,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:42,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1115512819, now seen corresponding path program 14 times [2024-06-14 12:35:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:42,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811945874] [2024-06-14 12:35:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:43,269 INFO 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 12:35:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811945874] [2024-06-14 12:35:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811945874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:43,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341816442] [2024-06-14 12:35:43,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:43,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:43,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:43,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 756 transitions, 12190 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:43,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:43,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:43,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:45,728 INFO L124 PetriNetUnfolderBase]: 4370/6915 cut-off events. [2024-06-14 12:35:45,729 INFO L125 PetriNetUnfolderBase]: For 1564933/1564935 co-relation queries the response was YES. [2024-06-14 12:35:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80982 conditions, 6915 events. 4370/6915 cut-off events. For 1564933/1564935 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42722 event pairs, 835 based on Foata normal form. 6/6915 useless extension candidates. Maximal degree in co-relation 80771. Up to 5088 conditions per place. [2024-06-14 12:35:45,856 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 252 changer transitions 0/774 dead transitions. [2024-06-14 12:35:45,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 774 transitions, 14354 flow [2024-06-14 12:35:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:35:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:35:45,857 INFO L175 Difference]: Start difference. First operand has 459 places, 756 transitions, 12190 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:35:45,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 774 transitions, 14354 flow [2024-06-14 12:35:53,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 774 transitions, 13758 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:53,262 INFO L231 Difference]: Finished difference. Result has 463 places, 756 transitions, 12108 flow [2024-06-14 12:35:53,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11594, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12108, PETRI_PLACES=463, PETRI_TRANSITIONS=756} [2024-06-14 12:35:53,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 419 predicate places. [2024-06-14 12:35:53,263 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 756 transitions, 12108 flow [2024-06-14 12:35:53,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:53,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:53,263 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 12:35:53,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:35:53,264 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 12:35:53,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash 296288623, now seen corresponding path program 15 times [2024-06-14 12:35:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609403006] [2024-06-14 12:35:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:53,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:54,274 INFO 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 12:35:54,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:54,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609403006] [2024-06-14 12:35:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609403006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:54,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:54,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097148089] [2024-06-14 12:35:54,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:54,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:54,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:54,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:54,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 756 transitions, 12108 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:54,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:56,644 INFO L124 PetriNetUnfolderBase]: 4406/6967 cut-off events. [2024-06-14 12:35:56,644 INFO L125 PetriNetUnfolderBase]: For 1603876/1603878 co-relation queries the response was YES. [2024-06-14 12:35:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81831 conditions, 6967 events. 4406/6967 cut-off events. For 1603876/1603878 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 42977 event pairs, 841 based on Foata normal form. 6/6967 useless extension candidates. Maximal degree in co-relation 81619. Up to 5107 conditions per place. [2024-06-14 12:35:56,768 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 510 selfloop transitions, 268 changer transitions 0/783 dead transitions. [2024-06-14 12:35:56,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 783 transitions, 14596 flow [2024-06-14 12:35:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:35:56,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:35:56,769 INFO L175 Difference]: Start difference. First operand has 463 places, 756 transitions, 12108 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:35:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 783 transitions, 14596 flow [2024-06-14 12:36:04,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 783 transitions, 14105 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:04,544 INFO L231 Difference]: Finished difference. Result has 466 places, 765 transitions, 12510 flow [2024-06-14 12:36:04,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11627, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12510, PETRI_PLACES=466, PETRI_TRANSITIONS=765} [2024-06-14 12:36:04,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 12:36:04,544 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 765 transitions, 12510 flow [2024-06-14 12:36:04,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:04,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:04,545 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 12:36:04,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:36:04,545 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 12:36:04,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1342588555, now seen corresponding path program 16 times [2024-06-14 12:36:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:04,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360197131] [2024-06-14 12:36:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:05,419 INFO 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 12:36:05,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:05,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360197131] [2024-06-14 12:36:05,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360197131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:05,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:05,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452597605] [2024-06-14 12:36:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:05,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:05,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:05,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:05,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 765 transitions, 12510 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:05,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:05,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:07,847 INFO L124 PetriNetUnfolderBase]: 4426/7027 cut-off events. [2024-06-14 12:36:07,847 INFO L125 PetriNetUnfolderBase]: For 1631047/1631049 co-relation queries the response was YES. [2024-06-14 12:36:07,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82617 conditions, 7027 events. 4426/7027 cut-off events. For 1631047/1631049 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43782 event pairs, 811 based on Foata normal form. 6/7027 useless extension candidates. Maximal degree in co-relation 82403. Up to 5123 conditions per place. [2024-06-14 12:36:07,980 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 272 changer transitions 0/788 dead transitions. [2024-06-14 12:36:07,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 788 transitions, 15104 flow [2024-06-14 12:36:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:36:07,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:36:07,982 INFO L175 Difference]: Start difference. First operand has 466 places, 765 transitions, 12510 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:36:07,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 788 transitions, 15104 flow [2024-06-14 12:36:15,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 788 transitions, 14591 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:15,100 INFO L231 Difference]: Finished difference. Result has 470 places, 769 transitions, 12678 flow [2024-06-14 12:36:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12678, PETRI_PLACES=470, PETRI_TRANSITIONS=769} [2024-06-14 12:36:15,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-14 12:36:15,101 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 769 transitions, 12678 flow [2024-06-14 12:36:15,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:15,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:15,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:36:15,101 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 12:36:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579389, now seen corresponding path program 17 times [2024-06-14 12:36:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977894673] [2024-06-14 12:36:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977894673] [2024-06-14 12:36:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977894673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466251987] [2024-06-14 12:36:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:16,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:16,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 769 transitions, 12678 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:16,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:16,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:16,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:18,427 INFO L124 PetriNetUnfolderBase]: 4452/7073 cut-off events. [2024-06-14 12:36:18,427 INFO L125 PetriNetUnfolderBase]: For 1653478/1653480 co-relation queries the response was YES. [2024-06-14 12:36:18,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83438 conditions, 7073 events. 4452/7073 cut-off events. For 1653478/1653480 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44204 event pairs, 837 based on Foata normal form. 4/7071 useless extension candidates. Maximal degree in co-relation 83223. Up to 5138 conditions per place. [2024-06-14 12:36:18,551 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 478 selfloop transitions, 312 changer transitions 0/795 dead transitions. [2024-06-14 12:36:18,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 795 transitions, 15390 flow [2024-06-14 12:36:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:36:18,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:36:18,552 INFO L175 Difference]: Start difference. First operand has 470 places, 769 transitions, 12678 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:36:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 795 transitions, 15390 flow [2024-06-14 12:36:25,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 795 transitions, 14803 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:25,686 INFO L231 Difference]: Finished difference. Result has 474 places, 776 transitions, 12958 flow [2024-06-14 12:36:25,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12958, PETRI_PLACES=474, PETRI_TRANSITIONS=776} [2024-06-14 12:36:25,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-14 12:36:25,686 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 776 transitions, 12958 flow [2024-06-14 12:36:25,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:25,686 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 12:36:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:36:25,687 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 12:36:25,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1585176639, now seen corresponding path program 18 times [2024-06-14 12:36:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166306524] [2024-06-14 12:36:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:26,595 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 12:36:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166306524] [2024-06-14 12:36:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166306524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491073987] [2024-06-14 12:36:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:26,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:26,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 776 transitions, 12958 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:26,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:26,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:26,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:28,867 INFO L124 PetriNetUnfolderBase]: 4462/7091 cut-off events. [2024-06-14 12:36:28,867 INFO L125 PetriNetUnfolderBase]: For 1675624/1675626 co-relation queries the response was YES. [2024-06-14 12:36:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83833 conditions, 7091 events. 4462/7091 cut-off events. For 1675624/1675626 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44407 event pairs, 822 based on Foata normal form. 4/7089 useless extension candidates. Maximal degree in co-relation 83616. Up to 5144 conditions per place. [2024-06-14 12:36:29,202 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 475 selfloop transitions, 319 changer transitions 0/799 dead transitions. [2024-06-14 12:36:29,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 799 transitions, 15585 flow [2024-06-14 12:36:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:36:29,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:36:29,203 INFO L175 Difference]: Start difference. First operand has 474 places, 776 transitions, 12958 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:36:29,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 799 transitions, 15585 flow [2024-06-14 12:36:37,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 799 transitions, 15155 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:37,157 INFO L231 Difference]: Finished difference. Result has 479 places, 780 transitions, 13297 flow [2024-06-14 12:36:37,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12547, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13297, PETRI_PLACES=479, PETRI_TRANSITIONS=780} [2024-06-14 12:36:37,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-14 12:36:37,158 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 780 transitions, 13297 flow [2024-06-14 12:36:37,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:37,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:37,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:36:37,158 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 12:36:37,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1187751697, now seen corresponding path program 19 times [2024-06-14 12:36:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335161768] [2024-06-14 12:36:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:38,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335161768] [2024-06-14 12:36:38,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335161768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175283766] [2024-06-14 12:36:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:38,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:38,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:38,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 780 transitions, 13297 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:38,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:38,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:38,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:40,560 INFO L124 PetriNetUnfolderBase]: 4456/7079 cut-off events. [2024-06-14 12:36:40,560 INFO L125 PetriNetUnfolderBase]: For 1681671/1681673 co-relation queries the response was YES. [2024-06-14 12:36:40,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83751 conditions, 7079 events. 4456/7079 cut-off events. For 1681671/1681673 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44333 event pairs, 761 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 83533. Up to 5141 conditions per place. [2024-06-14 12:36:40,689 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 471 selfloop transitions, 322 changer transitions 0/798 dead transitions. [2024-06-14 12:36:40,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 798 transitions, 15529 flow [2024-06-14 12:36:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:36:40,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:36:40,690 INFO L175 Difference]: Start difference. First operand has 479 places, 780 transitions, 13297 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:36:40,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 798 transitions, 15529 flow [2024-06-14 12:36:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 798 transitions, 15085 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:48,197 INFO L231 Difference]: Finished difference. Result has 484 places, 780 transitions, 13503 flow [2024-06-14 12:36:48,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12853, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13503, PETRI_PLACES=484, PETRI_TRANSITIONS=780} [2024-06-14 12:36:48,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-14 12:36:48,198 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 780 transitions, 13503 flow [2024-06-14 12:36:48,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:48,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:48,198 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 12:36:48,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:36:48,198 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 12:36:48,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1187901427, now seen corresponding path program 20 times [2024-06-14 12:36:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477866472] [2024-06-14 12:36:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:49,095 INFO 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 12:36:49,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:49,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477866472] [2024-06-14 12:36:49,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477866472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:49,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268535394] [2024-06-14 12:36:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:49,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 780 transitions, 13503 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:49,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:51,435 INFO L124 PetriNetUnfolderBase]: 4444/7063 cut-off events. [2024-06-14 12:36:51,436 INFO L125 PetriNetUnfolderBase]: For 1686638/1686640 co-relation queries the response was YES. [2024-06-14 12:36:51,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83390 conditions, 7063 events. 4444/7063 cut-off events. For 1686638/1686640 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44214 event pairs, 759 based on Foata normal form. 6/7063 useless extension candidates. Maximal degree in co-relation 83171. Up to 5133 conditions per place. [2024-06-14 12:36:51,567 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 490 selfloop transitions, 303 changer transitions 0/798 dead transitions. [2024-06-14 12:36:51,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 798 transitions, 15739 flow [2024-06-14 12:36:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:36:51,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:36:51,568 INFO L175 Difference]: Start difference. First operand has 484 places, 780 transitions, 13503 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:36:51,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 798 transitions, 15739 flow [2024-06-14 12:36:59,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 798 transitions, 15144 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:59,363 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13522 flow [2024-06-14 12:36:59,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13522, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-14 12:36:59,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-14 12:36:59,364 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13522 flow [2024-06-14 12:36:59,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:59,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:59,365 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 12:36:59,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:36:59,365 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 12:36:59,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:59,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1616265007, now seen corresponding path program 21 times [2024-06-14 12:36:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:59,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389057974] [2024-06-14 12:36:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:00,268 INFO 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 12:37:00,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389057974] [2024-06-14 12:37:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389057974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057339604] [2024-06-14 12:37:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:00,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:00,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:00,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:00,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:00,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13522 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:02,582 INFO L124 PetriNetUnfolderBase]: 4432/7041 cut-off events. [2024-06-14 12:37:02,582 INFO L125 PetriNetUnfolderBase]: For 1667996/1667998 co-relation queries the response was YES. [2024-06-14 12:37:02,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82815 conditions, 7041 events. 4432/7041 cut-off events. For 1667996/1667998 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43987 event pairs, 813 based on Foata normal form. 6/7041 useless extension candidates. Maximal degree in co-relation 82595. Up to 5125 conditions per place. [2024-06-14 12:37:02,719 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 282 changer transitions 0/798 dead transitions. [2024-06-14 12:37:02,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 798 transitions, 15762 flow [2024-06-14 12:37:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:37:02,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:37:02,721 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13522 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:37:02,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 798 transitions, 15762 flow [2024-06-14 12:37:10,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 798 transitions, 15110 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:10,718 INFO L231 Difference]: Finished difference. Result has 489 places, 780 transitions, 13441 flow [2024-06-14 12:37:10,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12870, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13441, PETRI_PLACES=489, PETRI_TRANSITIONS=780} [2024-06-14 12:37:10,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-14 12:37:10,719 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 780 transitions, 13441 flow [2024-06-14 12:37:10,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:10,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:10,719 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 12:37:10,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:37:10,719 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 12:37:10,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash 72978445, now seen corresponding path program 22 times [2024-06-14 12:37:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964039787] [2024-06-14 12:37:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964039787] [2024-06-14 12:37:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964039787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:11,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:11,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993434466] [2024-06-14 12:37:11,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:11,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:11,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:11,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 780 transitions, 13441 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:11,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:11,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:14,191 INFO L124 PetriNetUnfolderBase]: 4422/6995 cut-off events. [2024-06-14 12:37:14,191 INFO L125 PetriNetUnfolderBase]: For 1646199/1646201 co-relation queries the response was YES. [2024-06-14 12:37:14,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82270 conditions, 6995 events. 4422/6995 cut-off events. For 1646199/1646201 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43242 event pairs, 851 based on Foata normal form. 4/6993 useless extension candidates. Maximal degree in co-relation 82049. Up to 5117 conditions per place. [2024-06-14 12:37:14,317 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-14 12:37:14,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 797 transitions, 15403 flow [2024-06-14 12:37:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:37:14,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:37:14,318 INFO L175 Difference]: Start difference. First operand has 489 places, 780 transitions, 13441 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:37:14,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 797 transitions, 15403 flow [2024-06-14 12:37:22,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 797 transitions, 14790 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:22,881 INFO L231 Difference]: Finished difference. Result has 491 places, 780 transitions, 13478 flow [2024-06-14 12:37:22,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12828, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13478, PETRI_PLACES=491, PETRI_TRANSITIONS=780} [2024-06-14 12:37:22,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-14 12:37:22,882 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 780 transitions, 13478 flow [2024-06-14 12:37:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:22,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:22,882 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 12:37:22,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:37:22,882 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 12:37:22,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 85865455, now seen corresponding path program 23 times [2024-06-14 12:37:22,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:22,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659933279] [2024-06-14 12:37:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:23,797 INFO 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 12:37:23,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:23,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659933279] [2024-06-14 12:37:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659933279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:23,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509000913] [2024-06-14 12:37:23,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:23,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:23,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 780 transitions, 13478 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:23,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:23,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:23,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:26,280 INFO L124 PetriNetUnfolderBase]: 4412/6991 cut-off events. [2024-06-14 12:37:26,280 INFO L125 PetriNetUnfolderBase]: For 1647266/1647268 co-relation queries the response was YES. [2024-06-14 12:37:26,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82021 conditions, 6991 events. 4412/6991 cut-off events. For 1647266/1647268 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43391 event pairs, 847 based on Foata normal form. 4/6989 useless extension candidates. Maximal degree in co-relation 81799. Up to 5109 conditions per place. [2024-06-14 12:37:26,403 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-14 12:37:26,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 797 transitions, 15442 flow [2024-06-14 12:37:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:37:26,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:37:26,404 INFO L175 Difference]: Start difference. First operand has 491 places, 780 transitions, 13478 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:37:26,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 797 transitions, 15442 flow [2024-06-14 12:37:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 797 transitions, 14390 flow, removed 52 selfloop flow, removed 14 redundant places. [2024-06-14 12:37:35,466 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13076 flow [2024-06-14 12:37:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12426, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13076, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-14 12:37:35,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-14 12:37:35,467 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13076 flow [2024-06-14 12:37:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:35,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:35,467 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 12:37:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:37:35,467 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 12:37:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 86310925, now seen corresponding path program 24 times [2024-06-14 12:37:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:35,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174831130] [2024-06-14 12:37:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:35,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:36,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:36,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174831130] [2024-06-14 12:37:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174831130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:36,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:36,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:36,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480751738] [2024-06-14 12:37:36,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:36,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:36,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:36,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:36,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:36,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:36,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13076 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:36,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:36,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:36,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:38,855 INFO L124 PetriNetUnfolderBase]: 4402/6979 cut-off events. [2024-06-14 12:37:38,855 INFO L125 PetriNetUnfolderBase]: For 1643825/1643827 co-relation queries the response was YES. [2024-06-14 12:37:38,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81041 conditions, 6979 events. 4402/6979 cut-off events. For 1643825/1643827 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43412 event pairs, 849 based on Foata normal form. 4/6977 useless extension candidates. Maximal degree in co-relation 80821. Up to 5101 conditions per place. [2024-06-14 12:37:38,987 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 465 selfloop transitions, 326 changer transitions 0/796 dead transitions. [2024-06-14 12:37:38,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 796 transitions, 14756 flow [2024-06-14 12:37:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:37:38,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:37:38,989 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13076 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:37:38,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 796 transitions, 14756 flow [2024-06-14 12:37:48,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 796 transitions, 13497 flow, removed 31 selfloop flow, removed 13 redundant places. [2024-06-14 12:37:48,346 INFO L231 Difference]: Finished difference. Result has 482 places, 780 transitions, 12475 flow [2024-06-14 12:37:48,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11817, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12475, PETRI_PLACES=482, PETRI_TRANSITIONS=780} [2024-06-14 12:37:48,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-14 12:37:48,347 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 780 transitions, 12475 flow [2024-06-14 12:37:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:48,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:48,347 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 12:37:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:37:48,348 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 12:37:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1115502899, now seen corresponding path program 3 times [2024-06-14 12:37:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:48,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33627862] [2024-06-14 12:37:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:49,548 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 12:37:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33627862] [2024-06-14 12:37:49,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33627862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:49,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:49,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:37:49,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414551040] [2024-06-14 12:37:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:37:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:37:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:37:49,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:37:49,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 780 transitions, 12475 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:49,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:49,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:37:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:51,751 INFO L124 PetriNetUnfolderBase]: 4407/6917 cut-off events. [2024-06-14 12:37:51,752 INFO L125 PetriNetUnfolderBase]: For 1638080/1638097 co-relation queries the response was YES. [2024-06-14 12:37:51,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80708 conditions, 6917 events. 4407/6917 cut-off events. For 1638080/1638097 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42159 event pairs, 1179 based on Foata normal form. 17/6931 useless extension candidates. Maximal degree in co-relation 80488. Up to 6422 conditions per place. [2024-06-14 12:37:51,885 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 722 selfloop transitions, 68 changer transitions 0/795 dead transitions. [2024-06-14 12:37:51,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 795 transitions, 14243 flow [2024-06-14 12:37:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:37:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:37:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:37:51,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:37:51,893 INFO L175 Difference]: Start difference. First operand has 482 places, 780 transitions, 12475 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:37:51,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 795 transitions, 14243 flow [2024-06-14 12:38:01,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 795 transitions, 13406 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 12:38:01,050 INFO L231 Difference]: Finished difference. Result has 482 places, 783 transitions, 11944 flow [2024-06-14 12:38:01,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11638, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11944, PETRI_PLACES=482, PETRI_TRANSITIONS=783} [2024-06-14 12:38:01,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-14 12:38:01,051 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 783 transitions, 11944 flow [2024-06-14 12:38:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:01,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:01,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:38:01,052 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 12:38:01,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1115503364, now seen corresponding path program 10 times [2024-06-14 12:38:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:01,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843939302] [2024-06-14 12:38:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:02,087 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 12:38:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843939302] [2024-06-14 12:38:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843939302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:02,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:02,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139428272] [2024-06-14 12:38:02,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:02,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:02,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:02,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 783 transitions, 11944 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:02,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:02,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:02,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:04,613 INFO L124 PetriNetUnfolderBase]: 4482/7052 cut-off events. [2024-06-14 12:38:04,613 INFO L125 PetriNetUnfolderBase]: For 1778546/1778548 co-relation queries the response was YES. [2024-06-14 12:38:04,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 7052 events. 4482/7052 cut-off events. For 1778546/1778548 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43371 event pairs, 863 based on Foata normal form. 5/7051 useless extension candidates. Maximal degree in co-relation 82405. Up to 4699 conditions per place. [2024-06-14 12:38:04,751 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 522 selfloop transitions, 291 changer transitions 0/818 dead transitions. [2024-06-14 12:38:04,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 818 transitions, 15330 flow [2024-06-14 12:38:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:38:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:38:04,752 INFO L175 Difference]: Start difference. First operand has 482 places, 783 transitions, 11944 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:38:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 818 transitions, 15330 flow [2024-06-14 12:38:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 818 transitions, 15046 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:13,420 INFO L231 Difference]: Finished difference. Result has 485 places, 794 transitions, 12808 flow [2024-06-14 12:38:13,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12808, PETRI_PLACES=485, PETRI_TRANSITIONS=794} [2024-06-14 12:38:13,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-14 12:38:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 794 transitions, 12808 flow [2024-06-14 12:38:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:13,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:13,421 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 12:38:13,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:38:13,422 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 12:38:13,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988642, now seen corresponding path program 11 times [2024-06-14 12:38:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227150319] [2024-06-14 12:38:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:14,408 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 12:38:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:14,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227150319] [2024-06-14 12:38:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227150319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:14,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817436933] [2024-06-14 12:38:14,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:14,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:14,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:14,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 794 transitions, 12808 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:14,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:14,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:17,069 INFO L124 PetriNetUnfolderBase]: 4541/7174 cut-off events. [2024-06-14 12:38:17,069 INFO L125 PetriNetUnfolderBase]: For 1878891/1878893 co-relation queries the response was YES. [2024-06-14 12:38:17,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86545 conditions, 7174 events. 4541/7174 cut-off events. For 1878891/1878893 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44658 event pairs, 835 based on Foata normal form. 5/7173 useless extension candidates. Maximal degree in co-relation 86322. Up to 4748 conditions per place. [2024-06-14 12:38:17,204 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 514 selfloop transitions, 308 changer transitions 0/827 dead transitions. [2024-06-14 12:38:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 827 transitions, 16212 flow [2024-06-14 12:38:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:38:17,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-14 12:38:17,205 INFO L175 Difference]: Start difference. First operand has 485 places, 794 transitions, 12808 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:38:17,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 827 transitions, 16212 flow [2024-06-14 12:38:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 827 transitions, 15635 flow, removed 155 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:25,429 INFO L231 Difference]: Finished difference. Result has 491 places, 802 transitions, 13296 flow [2024-06-14 12:38:25,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13296, PETRI_PLACES=491, PETRI_TRANSITIONS=802} [2024-06-14 12:38:25,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-14 12:38:25,430 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 802 transitions, 13296 flow [2024-06-14 12:38:25,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:25,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:25,431 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 12:38:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:38:25,431 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 12:38:25,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2140714875, now seen corresponding path program 4 times [2024-06-14 12:38:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:25,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647096366] [2024-06-14 12:38:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:26,644 INFO 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 12:38:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647096366] [2024-06-14 12:38:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647096366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:26,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623074008] [2024-06-14 12:38:26,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:26,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:26,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 802 transitions, 13296 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:26,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:26,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:26,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:29,304 INFO L124 PetriNetUnfolderBase]: 4546/7119 cut-off events. [2024-06-14 12:38:29,304 INFO L125 PetriNetUnfolderBase]: For 1882890/1882907 co-relation queries the response was YES. [2024-06-14 12:38:29,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87465 conditions, 7119 events. 4546/7119 cut-off events. For 1882890/1882907 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43595 event pairs, 1203 based on Foata normal form. 17/7133 useless extension candidates. Maximal degree in co-relation 87239. Up to 6615 conditions per place. [2024-06-14 12:38:29,433 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 742 selfloop transitions, 70 changer transitions 0/817 dead transitions. [2024-06-14 12:38:29,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 817 transitions, 15122 flow [2024-06-14 12:38:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 12:38:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-14 12:38:29,435 INFO L175 Difference]: Start difference. First operand has 491 places, 802 transitions, 13296 flow. Second operand 10 states and 169 transitions. [2024-06-14 12:38:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 817 transitions, 15122 flow [2024-06-14 12:38:37,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 817 transitions, 14271 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-14 12:38:37,821 INFO L231 Difference]: Finished difference. Result has 494 places, 805 transitions, 12769 flow [2024-06-14 12:38:37,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12445, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12769, PETRI_PLACES=494, PETRI_TRANSITIONS=805} [2024-06-14 12:38:37,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-14 12:38:37,821 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 805 transitions, 12769 flow [2024-06-14 12:38:37,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:37,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:37,821 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 12:38:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:38:37,822 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 12:38:37,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1187459057, now seen corresponding path program 5 times [2024-06-14 12:38:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:37,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028791617] [2024-06-14 12:38:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:39,046 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 12:38:39,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028791617] [2024-06-14 12:38:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028791617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:39,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:39,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855599336] [2024-06-14 12:38:39,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:39,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:39,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 805 transitions, 12769 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:39,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:39,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:39,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:41,658 INFO L124 PetriNetUnfolderBase]: 4551/7121 cut-off events. [2024-06-14 12:38:41,658 INFO L125 PetriNetUnfolderBase]: For 1898145/1898145 co-relation queries the response was YES. [2024-06-14 12:38:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86453 conditions, 7121 events. 4551/7121 cut-off events. For 1898145/1898145 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43551 event pairs, 1522 based on Foata normal form. 1/7121 useless extension candidates. Maximal degree in co-relation 86226. Up to 6697 conditions per place. [2024-06-14 12:38:41,796 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 791 selfloop transitions, 24 changer transitions 0/820 dead transitions. [2024-06-14 12:38:41,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 820 transitions, 14607 flow [2024-06-14 12:38:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 12:38:41,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 12:38:41,798 INFO L175 Difference]: Start difference. First operand has 494 places, 805 transitions, 12769 flow. Second operand 10 states and 162 transitions. [2024-06-14 12:38:41,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 820 transitions, 14607 flow [2024-06-14 12:38:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 820 transitions, 14305 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:49,497 INFO L231 Difference]: Finished difference. Result has 496 places, 808 transitions, 12705 flow [2024-06-14 12:38:49,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12467, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12705, PETRI_PLACES=496, PETRI_TRANSITIONS=808} [2024-06-14 12:38:49,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 452 predicate places. [2024-06-14 12:38:49,498 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 808 transitions, 12705 flow [2024-06-14 12:38:49,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:49,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:49,499 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 12:38:49,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:38:49,499 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:49,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1539466396, now seen corresponding path program 12 times [2024-06-14 12:38:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:49,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988477787] [2024-06-14 12:38:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:50,458 INFO 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 12:38:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988477787] [2024-06-14 12:38:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988477787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914679159] [2024-06-14 12:38:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:50,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:50,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:50,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 808 transitions, 12705 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:50,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:50,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:50,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:53,162 INFO L124 PetriNetUnfolderBase]: 4614/7243 cut-off events. [2024-06-14 12:38:53,163 INFO L125 PetriNetUnfolderBase]: For 2012598/2012600 co-relation queries the response was YES. [2024-06-14 12:38:53,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88681 conditions, 7243 events. 4614/7243 cut-off events. For 2012598/2012600 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44559 event pairs, 893 based on Foata normal form. 5/7245 useless extension candidates. Maximal degree in co-relation 88453. Up to 4821 conditions per place. [2024-06-14 12:38:53,303 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 341 changer transitions 0/844 dead transitions. [2024-06-14 12:38:53,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 844 transitions, 16078 flow [2024-06-14 12:38:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:38:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:38:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:38:53,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:38:53,304 INFO L175 Difference]: Start difference. First operand has 496 places, 808 transitions, 12705 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:38:53,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 844 transitions, 16078 flow