./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019.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/mix019.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix019.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix019.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:00:14,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:00:14,530 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:00:14,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:00:14,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:00:14,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:00:14,548 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:00:14,549 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:00:14,549 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:00:14,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:00:14,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:00:14,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:00:14,551 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:00:14,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:00:14,551 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:00:14,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:00:14,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:00:14,552 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:00:14,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:00:14,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:00:14,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:00:14,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:00:14,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:00:14,554 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:00:14,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:00:14,555 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:00:14,555 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:00:14,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:00:14,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:00:14,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:00:14,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:00:14,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:00:14,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:00:14,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:00:14,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:00:14,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:00:14,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:00:14,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:00:14,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:00:14,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:00:14,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:00:14,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:00:14,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:00:14,561 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:00:14,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:00:14,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:00:14,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:00:14,782 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:00:14,782 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:00:14,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix019.opt.yml/witness.yml [2024-06-20 16:00:14,906 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:00:14,906 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:00:14,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019.opt.i [2024-06-20 16:00:16,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:00:16,235 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:00:16,236 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019.opt.i [2024-06-20 16:00:16,247 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/659111d5c/fd69fdf3a8494f8da8ca1fc74df9836a/FLAG60f39383d [2024-06-20 16:00:16,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/659111d5c/fd69fdf3a8494f8da8ca1fc74df9836a [2024-06-20 16:00:16,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:00:16,258 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:00:16,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:00:16,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:00:16,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:00:16,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:00:14" (1/2) ... [2024-06-20 16:00:16,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366b6468 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:00:16, skipping insertion in model container [2024-06-20 16:00:16,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:00:14" (1/2) ... [2024-06-20 16:00:16,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@375baf1d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:00:16, skipping insertion in model container [2024-06-20 16:00:16,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:00:16" (2/2) ... [2024-06-20 16:00:16,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@366b6468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16, skipping insertion in model container [2024-06-20 16:00:16,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:00:16" (2/2) ... [2024-06-20 16:00:16,266 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:00:16,339 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:00:16,340 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-20 16:00:16,340 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-20 16:00:16,341 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-20 16:00:16,341 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:00:16,341 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-20 16:00:16,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:00:16,749 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:00:16,758 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:00:16,883 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:00:16,920 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:00:16,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16 WrapperNode [2024-06-20 16:00:16,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:00:16,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:00:16,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:00:16,922 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:00:16,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:16,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:16,985 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 148 [2024-06-20 16:00:16,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:00:16,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:00:16,987 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:00:16,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:00:16,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:16,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,009 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,027 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:00:17,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:00:17,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:00:17,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:00:17,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:00:17,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (1/1) ... [2024-06-20 16:00:17,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:00:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:00:17,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:00:17,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:00:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:00:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:00:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:00:17,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:00:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:00:17,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:00:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:00:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:00:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:00:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:00:17,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:00:17,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:00:17,093 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:00:17,182 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:00:17,183 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:00:17,474 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:00:17,475 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:00:17,644 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:00:17,645 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:00:17,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:00:17 BoogieIcfgContainer [2024-06-20 16:00:17,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:00:17,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:00:17,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:00:17,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:00:17,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:00:14" (1/4) ... [2024-06-20 16:00:17,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb2cc4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:00:17, skipping insertion in model container [2024-06-20 16:00:17,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:00:16" (2/4) ... [2024-06-20 16:00:17,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb2cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:00:17, skipping insertion in model container [2024-06-20 16:00:17,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:00:16" (3/4) ... [2024-06-20 16:00:17,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70cb2cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:00:17, skipping insertion in model container [2024-06-20 16:00:17,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:00:17" (4/4) ... [2024-06-20 16:00:17,655 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019.opt.i [2024-06-20 16:00:17,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:00:17,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:00:17,668 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:00:17,707 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:00:17,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:00:17,760 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 16:00:17,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:00:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:00:17,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:00:17,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 16:00:17,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:00:17,782 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;@46c98784, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:00:17,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:00:17,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:00:17,787 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:00:17,787 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:00:17,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:17,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:00:17,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:17,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 394630545, now seen corresponding path program 1 times [2024-06-20 16:00:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900606191] [2024-06-20 16:00:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:18,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:18,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900606191] [2024-06-20 16:00:18,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900606191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:18,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:18,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:00:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599300856] [2024-06-20 16:00:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:18,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:00:18,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:00:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:00:18,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 16:00:18,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:18,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:18,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 16:00:18,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:19,109 INFO L124 PetriNetUnfolderBase]: 1116/1756 cut-off events. [2024-06-20 16:00:19,110 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 16:00:19,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3507 conditions, 1756 events. 1116/1756 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8656 event pairs, 765 based on Foata normal form. 1/1686 useless extension candidates. Maximal degree in co-relation 3495. Up to 1676 conditions per place. [2024-06-20 16:00:19,124 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 16:00:19,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-20 16:00:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:00:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:00:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-20 16:00:19,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 16:00:19,135 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-20 16:00:19,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-20 16:00:19,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:19,140 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 16:00:19,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 16:00:19,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 16:00:19,145 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 16:00:19,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:19,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:19,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:19,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:00:19,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1282871984, now seen corresponding path program 1 times [2024-06-20 16:00:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850808941] [2024-06-20 16:00:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850808941] [2024-06-20 16:00:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850808941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:19,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:00:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129751962] [2024-06-20 16:00:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:00:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:00:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:00:19,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 16:00:19,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:19,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:19,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 16:00:19,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:20,035 INFO L124 PetriNetUnfolderBase]: 1280/1957 cut-off events. [2024-06-20 16:00:20,035 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-20 16:00:20,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 1957 events. 1280/1957 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9402 event pairs, 750 based on Foata normal form. 3/1952 useless extension candidates. Maximal degree in co-relation 4466. Up to 1897 conditions per place. [2024-06-20 16:00:20,046 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-20 16:00:20,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-20 16:00:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:00:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:00:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-20 16:00:20,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 16:00:20,050 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-20 16:00:20,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-20 16:00:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:00:20,053 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 16:00:20,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 16:00:20,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 16:00:20,054 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 16:00:20,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:20,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:20,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:20,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:00:20,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:20,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1114327160, now seen corresponding path program 1 times [2024-06-20 16:00:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:20,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155080098] [2024-06-20 16:00:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:20,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:20,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155080098] [2024-06-20 16:00:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155080098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:00:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164349291] [2024-06-20 16:00:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:00:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:00:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:00:20,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 16:00:20,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:20,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:20,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 16:00:20,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:21,083 INFO L124 PetriNetUnfolderBase]: 1302/2008 cut-off events. [2024-06-20 16:00:21,084 INFO L125 PetriNetUnfolderBase]: For 1139/1139 co-relation queries the response was YES. [2024-06-20 16:00:21,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5095 conditions, 2008 events. 1302/2008 cut-off events. For 1139/1139 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9817 event pairs, 470 based on Foata normal form. 7/2008 useless extension candidates. Maximal degree in co-relation 5081. Up to 1800 conditions per place. [2024-06-20 16:00:21,092 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-20 16:00:21,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 404 flow [2024-06-20 16:00:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:00:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:00:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 16:00:21,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 16:00:21,094 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 130 transitions. [2024-06-20 16:00:21,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 404 flow [2024-06-20 16:00:21,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:00:21,097 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-20 16:00:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-20 16:00:21,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 16:00:21,098 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-20 16:00:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:21,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:21,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:00:21,098 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)] === [2024-06-20 16:00:21,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1420992673, now seen corresponding path program 1 times [2024-06-20 16:00:21,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484767918] [2024-06-20 16:00:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:21,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:21,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:21,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484767918] [2024-06-20 16:00:21,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484767918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:21,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:21,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:00:21,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170340883] [2024-06-20 16:00:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:21,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:00:21,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:00:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:00:21,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 16:00:21,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:21,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:21,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 16:00:21,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:22,268 INFO L124 PetriNetUnfolderBase]: 1384/2154 cut-off events. [2024-06-20 16:00:22,268 INFO L125 PetriNetUnfolderBase]: For 2930/2930 co-relation queries the response was YES. [2024-06-20 16:00:22,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6513 conditions, 2154 events. 1384/2154 cut-off events. For 2930/2930 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10833 event pairs, 321 based on Foata normal form. 26/2173 useless extension candidates. Maximal degree in co-relation 6496. Up to 1764 conditions per place. [2024-06-20 16:00:22,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 18 changer transitions 0/87 dead transitions. [2024-06-20 16:00:22,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 521 flow [2024-06-20 16:00:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 16:00:22,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 16:00:22,282 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 152 transitions. [2024-06-20 16:00:22,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 521 flow [2024-06-20 16:00:22,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 513 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 16:00:22,286 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 283 flow [2024-06-20 16:00:22,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-20 16:00:22,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-20 16:00:22,287 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 283 flow [2024-06-20 16:00:22,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:22,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:22,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:22,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:00:22,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:22,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash 637640795, now seen corresponding path program 1 times [2024-06-20 16:00:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603784670] [2024-06-20 16:00:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603784670] [2024-06-20 16:00:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603784670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:22,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:22,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:00:22,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532158920] [2024-06-20 16:00:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:00:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:00:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:00:22,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:22,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:22,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:22,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:23,242 INFO L124 PetriNetUnfolderBase]: 1204/1959 cut-off events. [2024-06-20 16:00:23,243 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-06-20 16:00:23,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 1959 events. 1204/1959 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10207 event pairs, 447 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 6271. Up to 1814 conditions per place. [2024-06-20 16:00:23,254 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 48 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-20 16:00:23,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 425 flow [2024-06-20 16:00:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:00:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:00:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-20 16:00:23,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 16:00:23,256 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 283 flow. Second operand 5 states and 100 transitions. [2024-06-20 16:00:23,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 425 flow [2024-06-20 16:00:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 381 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:23,260 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 263 flow [2024-06-20 16:00:23,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-20 16:00:23,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 16:00:23,267 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 263 flow [2024-06-20 16:00:23,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:23,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:23,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:23,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:00:23,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:23,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1671494376, now seen corresponding path program 1 times [2024-06-20 16:00:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:23,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618195013] [2024-06-20 16:00:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618195013] [2024-06-20 16:00:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618195013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:23,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:23,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347596241] [2024-06-20 16:00:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:23,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:23,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 263 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:23,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:23,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:23,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:24,375 INFO L124 PetriNetUnfolderBase]: 1386/2158 cut-off events. [2024-06-20 16:00:24,376 INFO L125 PetriNetUnfolderBase]: For 4805/4805 co-relation queries the response was YES. [2024-06-20 16:00:24,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 2158 events. 1386/2158 cut-off events. For 4805/4805 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10782 event pairs, 459 based on Foata normal form. 8/2160 useless extension candidates. Maximal degree in co-relation 6990. Up to 1943 conditions per place. [2024-06-20 16:00:24,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-20 16:00:24,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 503 flow [2024-06-20 16:00:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-20 16:00:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-20 16:00:24,390 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 263 flow. Second operand 6 states and 124 transitions. [2024-06-20 16:00:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 503 flow [2024-06-20 16:00:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 481 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:24,393 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 313 flow [2024-06-20 16:00:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-20 16:00:24,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 16:00:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 313 flow [2024-06-20 16:00:24,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:00:24,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1407492486, now seen corresponding path program 2 times [2024-06-20 16:00:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108288802] [2024-06-20 16:00:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:24,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:24,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108288802] [2024-06-20 16:00:24,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108288802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:24,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:24,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:24,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300411394] [2024-06-20 16:00:24,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:24,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:24,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:25,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:25,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:25,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:25,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:25,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:25,586 INFO L124 PetriNetUnfolderBase]: 1354/2087 cut-off events. [2024-06-20 16:00:25,586 INFO L125 PetriNetUnfolderBase]: For 5877/5883 co-relation queries the response was YES. [2024-06-20 16:00:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7088 conditions, 2087 events. 1354/2087 cut-off events. For 5877/5883 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10225 event pairs, 469 based on Foata normal form. 5/2081 useless extension candidates. Maximal degree in co-relation 7065. Up to 1895 conditions per place. [2024-06-20 16:00:25,598 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 46 selfloop transitions, 20 changer transitions 0/71 dead transitions. [2024-06-20 16:00:25,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 489 flow [2024-06-20 16:00:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-20 16:00:25,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-20 16:00:25,600 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 313 flow. Second operand 6 states and 120 transitions. [2024-06-20 16:00:25,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 489 flow [2024-06-20 16:00:25,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 460 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:25,605 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 332 flow [2024-06-20 16:00:25,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-06-20 16:00:25,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 16:00:25,606 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 332 flow [2024-06-20 16:00:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:25,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:25,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:00:25,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:25,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash -99339420, now seen corresponding path program 1 times [2024-06-20 16:00:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:25,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775914366] [2024-06-20 16:00:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:26,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:26,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775914366] [2024-06-20 16:00:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775914366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:26,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:26,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:26,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720101278] [2024-06-20 16:00:26,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:26,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:26,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:26,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:26,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:26,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:26,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:27,197 INFO L124 PetriNetUnfolderBase]: 1176/1895 cut-off events. [2024-06-20 16:00:27,197 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2024-06-20 16:00:27,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 1895 events. 1176/1895 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9591 event pairs, 406 based on Foata normal form. 4/1883 useless extension candidates. Maximal degree in co-relation 6459. Up to 1742 conditions per place. [2024-06-20 16:00:27,211 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-20 16:00:27,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 563 flow [2024-06-20 16:00:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:00:27,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 16:00:27,213 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 332 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:00:27,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 563 flow [2024-06-20 16:00:27,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 493 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:27,219 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 342 flow [2024-06-20 16:00:27,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-20 16:00:27,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 16:00:27,221 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 342 flow [2024-06-20 16:00:27,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:27,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:27,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:27,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:00:27,222 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)] === [2024-06-20 16:00:27,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -657113355, now seen corresponding path program 1 times [2024-06-20 16:00:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:27,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959568359] [2024-06-20 16:00:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:27,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959568359] [2024-06-20 16:00:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959568359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:27,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:00:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67622622] [2024-06-20 16:00:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:27,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:00:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:00:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:00:27,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:27,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:27,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:27,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:28,214 INFO L124 PetriNetUnfolderBase]: 1173/1906 cut-off events. [2024-06-20 16:00:28,215 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-20 16:00:28,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 1906 events. 1173/1906 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9747 event pairs, 420 based on Foata normal form. 1/1904 useless extension candidates. Maximal degree in co-relation 6720. Up to 1771 conditions per place. [2024-06-20 16:00:28,226 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-20 16:00:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 508 flow [2024-06-20 16:00:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:00:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:00:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-20 16:00:28,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:00:28,228 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 342 flow. Second operand 5 states and 95 transitions. [2024-06-20 16:00:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 508 flow [2024-06-20 16:00:28,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 475 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:28,233 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 357 flow [2024-06-20 16:00:28,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-20 16:00:28,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-20 16:00:28,234 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 357 flow [2024-06-20 16:00:28,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:28,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:28,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:28,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:00:28,235 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)] === [2024-06-20 16:00:28,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1104324287, now seen corresponding path program 1 times [2024-06-20 16:00:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:28,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132636807] [2024-06-20 16:00:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:29,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132636807] [2024-06-20 16:00:29,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132636807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:29,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:29,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:29,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422186403] [2024-06-20 16:00:29,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:29,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:29,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:29,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:29,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 357 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:29,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:29,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:29,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:29,599 INFO L124 PetriNetUnfolderBase]: 1167/1898 cut-off events. [2024-06-20 16:00:29,600 INFO L125 PetriNetUnfolderBase]: For 8241/8241 co-relation queries the response was YES. [2024-06-20 16:00:29,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6995 conditions, 1898 events. 1167/1898 cut-off events. For 8241/8241 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9673 event pairs, 418 based on Foata normal form. 2/1897 useless extension candidates. Maximal degree in co-relation 6968. Up to 1757 conditions per place. [2024-06-20 16:00:29,611 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-20 16:00:29,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 541 flow [2024-06-20 16:00:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:00:29,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:00:29,612 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 357 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:00:29,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 541 flow [2024-06-20 16:00:29,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 515 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:29,618 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 389 flow [2024-06-20 16:00:29,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-20 16:00:29,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 16:00:29,619 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 389 flow [2024-06-20 16:00:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:29,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:29,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:29,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:00:29,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:29,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash 244621001, now seen corresponding path program 1 times [2024-06-20 16:00:29,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:29,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571285914] [2024-06-20 16:00:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:30,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:30,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571285914] [2024-06-20 16:00:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571285914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:30,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146507834] [2024-06-20 16:00:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:30,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:30,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:30,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:30,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:30,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 389 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:30,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:30,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:30,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:30,849 INFO L124 PetriNetUnfolderBase]: 1478/2317 cut-off events. [2024-06-20 16:00:30,849 INFO L125 PetriNetUnfolderBase]: For 13462/13465 co-relation queries the response was YES. [2024-06-20 16:00:30,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9153 conditions, 2317 events. 1478/2317 cut-off events. For 13462/13465 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11718 event pairs, 328 based on Foata normal form. 16/2328 useless extension candidates. Maximal degree in co-relation 9125. Up to 1656 conditions per place. [2024-06-20 16:00:30,871 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 74 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-06-20 16:00:30,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 101 transitions, 739 flow [2024-06-20 16:00:30,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 16:00:30,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-20 16:00:30,873 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 389 flow. Second operand 7 states and 146 transitions. [2024-06-20 16:00:30,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 101 transitions, 739 flow [2024-06-20 16:00:30,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 703 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:30,881 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 429 flow [2024-06-20 16:00:30,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-20 16:00:30,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 16:00:30,882 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 429 flow [2024-06-20 16:00:30,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:30,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:30,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:00:30,882 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:30,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 247477961, now seen corresponding path program 2 times [2024-06-20 16:00:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91817243] [2024-06-20 16:00:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:31,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91817243] [2024-06-20 16:00:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91817243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:31,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:31,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474406893] [2024-06-20 16:00:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:31,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:31,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:31,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:31,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:31,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:32,222 INFO L124 PetriNetUnfolderBase]: 1520/2391 cut-off events. [2024-06-20 16:00:32,222 INFO L125 PetriNetUnfolderBase]: For 15840/15843 co-relation queries the response was YES. [2024-06-20 16:00:32,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 2391 events. 1520/2391 cut-off events. For 15840/15843 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12231 event pairs, 483 based on Foata normal form. 24/2410 useless extension candidates. Maximal degree in co-relation 9625. Up to 2043 conditions per place. [2024-06-20 16:00:32,238 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-20 16:00:32,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 713 flow [2024-06-20 16:00:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 16:00:32,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-20 16:00:32,240 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 429 flow. Second operand 7 states and 143 transitions. [2024-06-20 16:00:32,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 713 flow [2024-06-20 16:00:32,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 97 transitions, 683 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:32,255 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 477 flow [2024-06-20 16:00:32,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-06-20 16:00:32,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-20 16:00:32,256 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 477 flow [2024-06-20 16:00:32,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:32,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:32,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:32,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:00:32,257 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)] === [2024-06-20 16:00:32,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -137125356, now seen corresponding path program 1 times [2024-06-20 16:00:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469524742] [2024-06-20 16:00:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:32,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:32,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469524742] [2024-06-20 16:00:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469524742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:32,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:32,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820676350] [2024-06-20 16:00:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:32,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:32,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:32,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:32,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:32,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:32,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:32,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:32,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:33,347 INFO L124 PetriNetUnfolderBase]: 1525/2408 cut-off events. [2024-06-20 16:00:33,348 INFO L125 PetriNetUnfolderBase]: For 16984/16984 co-relation queries the response was YES. [2024-06-20 16:00:33,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 2408 events. 1525/2408 cut-off events. For 16984/16984 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12318 event pairs, 544 based on Foata normal form. 1/2406 useless extension candidates. Maximal degree in co-relation 10092. Up to 2310 conditions per place. [2024-06-20 16:00:33,361 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-06-20 16:00:33,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 703 flow [2024-06-20 16:00:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:00:33,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:00:33,363 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 477 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:00:33,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 703 flow [2024-06-20 16:00:33,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 649 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:33,377 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 483 flow [2024-06-20 16:00:33,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=483, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-06-20 16:00:33,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 16:00:33,378 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 483 flow [2024-06-20 16:00:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:33,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:33,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:00:33,379 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:33,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -213698785, now seen corresponding path program 1 times [2024-06-20 16:00:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441120761] [2024-06-20 16:00:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:34,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441120761] [2024-06-20 16:00:34,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441120761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:34,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:34,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828850128] [2024-06-20 16:00:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:34,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:34,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:34,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:34,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 483 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:34,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:34,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:34,953 INFO L124 PetriNetUnfolderBase]: 1553/2444 cut-off events. [2024-06-20 16:00:34,953 INFO L125 PetriNetUnfolderBase]: For 19515/19521 co-relation queries the response was YES. [2024-06-20 16:00:34,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10545 conditions, 2444 events. 1553/2444 cut-off events. For 19515/19521 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12479 event pairs, 505 based on Foata normal form. 5/2438 useless extension candidates. Maximal degree in co-relation 10513. Up to 2204 conditions per place. [2024-06-20 16:00:34,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 70 selfloop transitions, 28 changer transitions 0/103 dead transitions. [2024-06-20 16:00:34,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 798 flow [2024-06-20 16:00:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:00:34,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:00:34,967 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 483 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:00:34,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 798 flow [2024-06-20 16:00:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 760 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:34,978 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 571 flow [2024-06-20 16:00:34,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=571, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-20 16:00:34,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-20 16:00:34,979 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 571 flow [2024-06-20 16:00:34,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:34,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:34,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:34,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:00:34,979 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:34,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash -976171931, now seen corresponding path program 2 times [2024-06-20 16:00:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:34,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531280338] [2024-06-20 16:00:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:35,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531280338] [2024-06-20 16:00:35,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531280338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:35,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755945032] [2024-06-20 16:00:35,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:35,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:35,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:35,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:35,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:35,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:36,660 INFO L124 PetriNetUnfolderBase]: 1545/2435 cut-off events. [2024-06-20 16:00:36,660 INFO L125 PetriNetUnfolderBase]: For 22552/22558 co-relation queries the response was YES. [2024-06-20 16:00:36,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11034 conditions, 2435 events. 1545/2435 cut-off events. For 22552/22558 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12476 event pairs, 503 based on Foata normal form. 5/2431 useless extension candidates. Maximal degree in co-relation 11000. Up to 2192 conditions per place. [2024-06-20 16:00:36,679 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 34 changer transitions 0/110 dead transitions. [2024-06-20 16:00:36,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 932 flow [2024-06-20 16:00:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:00:36,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:00:36,682 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 571 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:00:36,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 932 flow [2024-06-20 16:00:36,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 849 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:36,707 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 666 flow [2024-06-20 16:00:36,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=666, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-20 16:00:36,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-20 16:00:36,709 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 666 flow [2024-06-20 16:00:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:36,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:36,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:00:36,710 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)] === [2024-06-20 16:00:36,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -975875261, now seen corresponding path program 3 times [2024-06-20 16:00:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807580726] [2024-06-20 16:00:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807580726] [2024-06-20 16:00:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807580726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:37,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:37,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347947306] [2024-06-20 16:00:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:37,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:37,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 666 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:37,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:38,429 INFO L124 PetriNetUnfolderBase]: 1578/2504 cut-off events. [2024-06-20 16:00:38,430 INFO L125 PetriNetUnfolderBase]: For 25388/25394 co-relation queries the response was YES. [2024-06-20 16:00:38,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11561 conditions, 2504 events. 1578/2504 cut-off events. For 25388/25394 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13053 event pairs, 411 based on Foata normal form. 5/2500 useless extension candidates. Maximal degree in co-relation 11525. Up to 2082 conditions per place. [2024-06-20 16:00:38,445 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 41 changer transitions 0/117 dead transitions. [2024-06-20 16:00:38,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1006 flow [2024-06-20 16:00:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:00:38,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-20 16:00:38,461 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 666 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:00:38,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1006 flow [2024-06-20 16:00:38,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 942 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:38,479 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 748 flow [2024-06-20 16:00:38,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=748, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-06-20 16:00:38,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 16:00:38,479 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 748 flow [2024-06-20 16:00:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:38,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:38,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:00:38,480 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)] === [2024-06-20 16:00:38,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash -125697516, now seen corresponding path program 2 times [2024-06-20 16:00:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:38,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592887635] [2024-06-20 16:00:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:39,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592887635] [2024-06-20 16:00:39,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592887635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:39,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:39,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:39,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182417464] [2024-06-20 16:00:39,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:39,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:39,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:39,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 748 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:39,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:39,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:39,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:39,671 INFO L124 PetriNetUnfolderBase]: 1575/2516 cut-off events. [2024-06-20 16:00:39,672 INFO L125 PetriNetUnfolderBase]: For 27861/27870 co-relation queries the response was YES. [2024-06-20 16:00:39,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11828 conditions, 2516 events. 1575/2516 cut-off events. For 27861/27870 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13163 event pairs, 507 based on Foata normal form. 7/2518 useless extension candidates. Maximal degree in co-relation 11790. Up to 2390 conditions per place. [2024-06-20 16:00:39,686 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 79 selfloop transitions, 16 changer transitions 0/100 dead transitions. [2024-06-20 16:00:39,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 998 flow [2024-06-20 16:00:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:00:39,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-20 16:00:39,687 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 748 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:00:39,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 998 flow [2024-06-20 16:00:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 908 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:39,703 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 740 flow [2024-06-20 16:00:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=740, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-06-20 16:00:39,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 16:00:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 740 flow [2024-06-20 16:00:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:39,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:39,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:00:39,704 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)] === [2024-06-20 16:00:39,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 841116906, now seen corresponding path program 1 times [2024-06-20 16:00:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575147913] [2024-06-20 16:00:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:39,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:40,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575147913] [2024-06-20 16:00:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575147913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:40,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:40,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005401100] [2024-06-20 16:00:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:40,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:40,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:40,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 740 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:40,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:40,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:40,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:40,771 INFO L124 PetriNetUnfolderBase]: 1418/2339 cut-off events. [2024-06-20 16:00:40,772 INFO L125 PetriNetUnfolderBase]: For 26483/26483 co-relation queries the response was YES. [2024-06-20 16:00:40,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 2339 events. 1418/2339 cut-off events. For 26483/26483 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12616 event pairs, 433 based on Foata normal form. 2/2338 useless extension candidates. Maximal degree in co-relation 10834. Up to 2172 conditions per place. [2024-06-20 16:00:40,785 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-06-20 16:00:40,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 107 transitions, 1002 flow [2024-06-20 16:00:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:00:40,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:00:40,788 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 740 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:00:40,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 107 transitions, 1002 flow [2024-06-20 16:00:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 942 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:40,806 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 738 flow [2024-06-20 16:00:40,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-20 16:00:40,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-20 16:00:40,807 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 738 flow [2024-06-20 16:00:40,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:40,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:40,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:00:40,808 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)] === [2024-06-20 16:00:40,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash -125691564, now seen corresponding path program 2 times [2024-06-20 16:00:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:40,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954979458] [2024-06-20 16:00:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:40,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:41,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954979458] [2024-06-20 16:00:41,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954979458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:41,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:41,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:00:41,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644150780] [2024-06-20 16:00:41,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:41,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:00:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:00:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:00:41,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 738 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:41,901 INFO L124 PetriNetUnfolderBase]: 1420/2345 cut-off events. [2024-06-20 16:00:41,902 INFO L125 PetriNetUnfolderBase]: For 28933/28936 co-relation queries the response was YES. [2024-06-20 16:00:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11237 conditions, 2345 events. 1420/2345 cut-off events. For 28933/28936 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12678 event pairs, 437 based on Foata normal form. 4/2345 useless extension candidates. Maximal degree in co-relation 11197. Up to 2166 conditions per place. [2024-06-20 16:00:41,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 86 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-06-20 16:00:41,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 1006 flow [2024-06-20 16:00:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:00:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:00:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:00:41,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:00:41,923 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 738 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:00:41,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 1006 flow [2024-06-20 16:00:41,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 970 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:41,942 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 776 flow [2024-06-20 16:00:41,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-20 16:00:41,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 16:00:41,942 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 776 flow [2024-06-20 16:00:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:41,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:41,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:00:41,943 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)] === [2024-06-20 16:00:41,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:41,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1288643194, now seen corresponding path program 1 times [2024-06-20 16:00:41,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:41,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672501395] [2024-06-20 16:00:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672501395] [2024-06-20 16:00:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672501395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:42,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58994903] [2024-06-20 16:00:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:42,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:42,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:42,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:42,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:42,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:43,191 INFO L124 PetriNetUnfolderBase]: 1602/2561 cut-off events. [2024-06-20 16:00:43,191 INFO L125 PetriNetUnfolderBase]: For 37613/37616 co-relation queries the response was YES. [2024-06-20 16:00:43,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 2561 events. 1602/2561 cut-off events. For 37613/37616 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13505 event pairs, 497 based on Foata normal form. 5/2562 useless extension candidates. Maximal degree in co-relation 12952. Up to 2363 conditions per place. [2024-06-20 16:00:43,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 24 changer transitions 0/127 dead transitions. [2024-06-20 16:00:43,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 127 transitions, 1144 flow [2024-06-20 16:00:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:00:43,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-20 16:00:43,206 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 776 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:00:43,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 127 transitions, 1144 flow [2024-06-20 16:00:43,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 127 transitions, 1092 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:43,227 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 862 flow [2024-06-20 16:00:43,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-06-20 16:00:43,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-20 16:00:43,228 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 862 flow [2024-06-20 16:00:43,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:43,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:43,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:43,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:00:43,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:43,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 135048111, now seen corresponding path program 1 times [2024-06-20 16:00:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:43,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565791092] [2024-06-20 16:00:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:44,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565791092] [2024-06-20 16:00:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565791092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:44,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848451834] [2024-06-20 16:00:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:44,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:44,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:44,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:44,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:44,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:44,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:44,847 INFO L124 PetriNetUnfolderBase]: 1712/2760 cut-off events. [2024-06-20 16:00:44,848 INFO L125 PetriNetUnfolderBase]: For 43670/43673 co-relation queries the response was YES. [2024-06-20 16:00:44,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14457 conditions, 2760 events. 1712/2760 cut-off events. For 43670/43673 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15010 event pairs, 507 based on Foata normal form. 12/2767 useless extension candidates. Maximal degree in co-relation 14414. Up to 2185 conditions per place. [2024-06-20 16:00:44,863 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 100 selfloop transitions, 37 changer transitions 0/142 dead transitions. [2024-06-20 16:00:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1286 flow [2024-06-20 16:00:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:00:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-20 16:00:44,866 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 862 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:00:44,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1286 flow [2024-06-20 16:00:44,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1218 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:44,900 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 943 flow [2024-06-20 16:00:44,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-06-20 16:00:44,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-20 16:00:44,901 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 943 flow [2024-06-20 16:00:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:44,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:44,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:44,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:00:44,901 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:44,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash -476655390, now seen corresponding path program 1 times [2024-06-20 16:00:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740343491] [2024-06-20 16:00:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:45,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740343491] [2024-06-20 16:00:45,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740343491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:45,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:45,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:45,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882286311] [2024-06-20 16:00:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:45,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:45,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:45,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:45,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:45,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:46,129 INFO L124 PetriNetUnfolderBase]: 1717/2767 cut-off events. [2024-06-20 16:00:46,129 INFO L125 PetriNetUnfolderBase]: For 46208/46208 co-relation queries the response was YES. [2024-06-20 16:00:46,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14835 conditions, 2767 events. 1717/2767 cut-off events. For 46208/46208 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15049 event pairs, 517 based on Foata normal form. 1/2765 useless extension candidates. Maximal degree in co-relation 14791. Up to 2623 conditions per place. [2024-06-20 16:00:46,145 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-20 16:00:46,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 128 transitions, 1269 flow [2024-06-20 16:00:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:00:46,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-20 16:00:46,146 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 943 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:00:46,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 128 transitions, 1269 flow [2024-06-20 16:00:46,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 128 transitions, 1218 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:46,178 INFO L231 Difference]: Finished difference. Result has 108 places, 112 transitions, 972 flow [2024-06-20 16:00:46,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2024-06-20 16:00:46,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 16:00:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 972 flow [2024-06-20 16:00:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:46,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:46,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:46,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:00:46,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:46,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash 44082700, now seen corresponding path program 2 times [2024-06-20 16:00:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:46,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772633123] [2024-06-20 16:00:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:46,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:46,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:46,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772633123] [2024-06-20 16:00:46,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772633123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:46,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:46,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:46,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266648463] [2024-06-20 16:00:46,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:46,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:46,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:46,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 972 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:47,459 INFO L124 PetriNetUnfolderBase]: 1768/2853 cut-off events. [2024-06-20 16:00:47,459 INFO L125 PetriNetUnfolderBase]: For 51103/51106 co-relation queries the response was YES. [2024-06-20 16:00:47,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15595 conditions, 2853 events. 1768/2853 cut-off events. For 51103/51106 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15674 event pairs, 522 based on Foata normal form. 5/2854 useless extension candidates. Maximal degree in co-relation 15550. Up to 2583 conditions per place. [2024-06-20 16:00:47,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-20 16:00:47,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 139 transitions, 1444 flow [2024-06-20 16:00:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 16:00:47,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-20 16:00:47,478 INFO L175 Difference]: Start difference. First operand has 108 places, 112 transitions, 972 flow. Second operand 7 states and 134 transitions. [2024-06-20 16:00:47,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 139 transitions, 1444 flow [2024-06-20 16:00:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 1386 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:47,569 INFO L231 Difference]: Finished difference. Result has 111 places, 120 transitions, 1106 flow [2024-06-20 16:00:47,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=111, PETRI_TRANSITIONS=120} [2024-06-20 16:00:47,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-20 16:00:47,570 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 120 transitions, 1106 flow [2024-06-20 16:00:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:47,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:47,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:47,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:00:47,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:47,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 17598723, now seen corresponding path program 2 times [2024-06-20 16:00:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568416686] [2024-06-20 16:00:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:47,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:48,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568416686] [2024-06-20 16:00:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568416686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:48,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:48,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449506582] [2024-06-20 16:00:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:48,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:48,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:48,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:48,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 120 transitions, 1106 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:48,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:48,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:48,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:49,130 INFO L124 PetriNetUnfolderBase]: 1748/2820 cut-off events. [2024-06-20 16:00:49,130 INFO L125 PetriNetUnfolderBase]: For 57084/57087 co-relation queries the response was YES. [2024-06-20 16:00:49,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16060 conditions, 2820 events. 1748/2820 cut-off events. For 57084/57087 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15413 event pairs, 317 based on Foata normal form. 12/2827 useless extension candidates. Maximal degree in co-relation 16013. Up to 1815 conditions per place. [2024-06-20 16:00:49,151 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 40 changer transitions 0/150 dead transitions. [2024-06-20 16:00:49,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 150 transitions, 1496 flow [2024-06-20 16:00:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 16:00:49,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-20 16:00:49,152 INFO L175 Difference]: Start difference. First operand has 111 places, 120 transitions, 1106 flow. Second operand 7 states and 143 transitions. [2024-06-20 16:00:49,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 150 transitions, 1496 flow [2024-06-20 16:00:49,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 150 transitions, 1421 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:49,195 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 1120 flow [2024-06-20 16:00:49,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1120, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-06-20 16:00:49,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-20 16:00:49,196 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 1120 flow [2024-06-20 16:00:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:49,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:49,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:49,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:00:49,196 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:49,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash 283296003, now seen corresponding path program 3 times [2024-06-20 16:00:49,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:49,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408883802] [2024-06-20 16:00:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:49,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408883802] [2024-06-20 16:00:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408883802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:50,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:00:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729962450] [2024-06-20 16:00:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:50,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:00:50,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:50,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:00:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:00:50,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:50,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 1120 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:50,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:50,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:50,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:50,782 INFO L124 PetriNetUnfolderBase]: 1728/2788 cut-off events. [2024-06-20 16:00:50,782 INFO L125 PetriNetUnfolderBase]: For 58864/58873 co-relation queries the response was YES. [2024-06-20 16:00:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16001 conditions, 2788 events. 1728/2788 cut-off events. For 58864/58873 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15213 event pairs, 285 based on Foata normal form. 13/2791 useless extension candidates. Maximal degree in co-relation 15952. Up to 1673 conditions per place. [2024-06-20 16:00:50,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-06-20 16:00:50,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 144 transitions, 1452 flow [2024-06-20 16:00:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:00:50,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 16:00:50,805 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 1120 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:00:50,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 144 transitions, 1452 flow [2024-06-20 16:00:50,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1348 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:50,841 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 1066 flow [2024-06-20 16:00:50,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1066, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-06-20 16:00:50,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-20 16:00:50,842 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 1066 flow [2024-06-20 16:00:50,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:50,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:50,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:50,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:00:50,842 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:50,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:50,843 INFO L85 PathProgramCache]: Analyzing trace with hash 398346112, now seen corresponding path program 2 times [2024-06-20 16:00:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:50,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523442373] [2024-06-20 16:00:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:51,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523442373] [2024-06-20 16:00:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523442373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:51,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452395330] [2024-06-20 16:00:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:51,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:51,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 1066 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:51,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:52,431 INFO L124 PetriNetUnfolderBase]: 1733/2797 cut-off events. [2024-06-20 16:00:52,432 INFO L125 PetriNetUnfolderBase]: For 56097/56109 co-relation queries the response was YES. [2024-06-20 16:00:52,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15985 conditions, 2797 events. 1733/2797 cut-off events. For 56097/56109 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15269 event pairs, 502 based on Foata normal form. 9/2801 useless extension candidates. Maximal degree in co-relation 15935. Up to 2631 conditions per place. [2024-06-20 16:00:52,452 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2024-06-20 16:00:52,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 132 transitions, 1394 flow [2024-06-20 16:00:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:00:52,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 16:00:52,453 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 1066 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:00:52,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 132 transitions, 1394 flow [2024-06-20 16:00:52,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 132 transitions, 1283 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:00:52,491 INFO L231 Difference]: Finished difference. Result has 116 places, 122 transitions, 1055 flow [2024-06-20 16:00:52,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1055, PETRI_PLACES=116, PETRI_TRANSITIONS=122} [2024-06-20 16:00:52,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-20 16:00:52,492 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 122 transitions, 1055 flow [2024-06-20 16:00:52,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:52,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:52,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:00:52,493 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)] === [2024-06-20 16:00:52,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -464691312, now seen corresponding path program 3 times [2024-06-20 16:00:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:52,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835939735] [2024-06-20 16:00:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:53,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835939735] [2024-06-20 16:00:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835939735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021082430] [2024-06-20 16:00:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:53,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:53,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:53,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 122 transitions, 1055 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:53,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:53,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:53,781 INFO L124 PetriNetUnfolderBase]: 1760/2840 cut-off events. [2024-06-20 16:00:53,782 INFO L125 PetriNetUnfolderBase]: For 60480/60489 co-relation queries the response was YES. [2024-06-20 16:00:53,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2840 events. 1760/2840 cut-off events. For 60480/60489 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15551 event pairs, 527 based on Foata normal form. 6/2837 useless extension candidates. Maximal degree in co-relation 16170. Up to 2506 conditions per place. [2024-06-20 16:00:53,801 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-20 16:00:53,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 145 transitions, 1609 flow [2024-06-20 16:00:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:00:53,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-20 16:00:53,802 INFO L175 Difference]: Start difference. First operand has 116 places, 122 transitions, 1055 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:00:53,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 145 transitions, 1609 flow [2024-06-20 16:00:53,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 1531 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:53,835 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1211 flow [2024-06-20 16:00:53,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-06-20 16:00:53,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 16:00:53,835 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1211 flow [2024-06-20 16:00:53,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:53,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:53,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:53,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:00:53,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:00:53,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash 398761822, now seen corresponding path program 3 times [2024-06-20 16:00:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24145673] [2024-06-20 16:00:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:54,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:54,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24145673] [2024-06-20 16:00:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24145673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:54,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:54,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360799079] [2024-06-20 16:00:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:54,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:00:54,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1211 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:54,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:54,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:00:54,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:55,334 INFO L124 PetriNetUnfolderBase]: 1757/2837 cut-off events. [2024-06-20 16:00:55,335 INFO L125 PetriNetUnfolderBase]: For 66489/66501 co-relation queries the response was YES. [2024-06-20 16:00:55,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16972 conditions, 2837 events. 1757/2837 cut-off events. For 66489/66501 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15551 event pairs, 508 based on Foata normal form. 9/2841 useless extension candidates. Maximal degree in co-relation 16920. Up to 2656 conditions per place. [2024-06-20 16:00:55,355 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 27 changer transitions 0/146 dead transitions. [2024-06-20 16:00:55,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 146 transitions, 1591 flow [2024-06-20 16:00:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:00:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 16:00:55,356 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1211 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:00:55,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 146 transitions, 1591 flow [2024-06-20 16:00:55,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 146 transitions, 1459 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 16:00:55,400 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1235 flow [2024-06-20 16:00:55,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1235, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2024-06-20 16:00:55,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 16:00:55,401 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1235 flow [2024-06-20 16:00:55,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:55,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:55,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:55,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:00:55,401 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)] === [2024-06-20 16:00:55,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 221278948, now seen corresponding path program 1 times [2024-06-20 16:00:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:55,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731901898] [2024-06-20 16:00:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:56,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731901898] [2024-06-20 16:00:56,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731901898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:56,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:56,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983308764] [2024-06-20 16:00:56,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:56,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:56,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:56,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:56,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:56,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 1235 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:56,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:56,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:56,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:56,922 INFO L124 PetriNetUnfolderBase]: 1650/2727 cut-off events. [2024-06-20 16:00:56,923 INFO L125 PetriNetUnfolderBase]: For 70921/70921 co-relation queries the response was YES. [2024-06-20 16:00:56,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16249 conditions, 2727 events. 1650/2727 cut-off events. For 70921/70921 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15280 event pairs, 458 based on Foata normal form. 1/2725 useless extension candidates. Maximal degree in co-relation 16195. Up to 2486 conditions per place. [2024-06-20 16:00:56,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-20 16:00:56,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 156 transitions, 1621 flow [2024-06-20 16:00:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:00:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:00:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:00:56,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:00:56,947 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1235 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:00:56,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 156 transitions, 1621 flow [2024-06-20 16:00:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1549 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 16:00:56,997 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1268 flow [2024-06-20 16:00:56,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-20 16:00:56,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 16:00:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1268 flow [2024-06-20 16:00:56,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:56,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:56,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:00:56,999 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)] === [2024-06-20 16:00:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -470935518, now seen corresponding path program 1 times [2024-06-20 16:00:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885201694] [2024-06-20 16:00:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:57,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885201694] [2024-06-20 16:00:57,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885201694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:57,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:57,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:57,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423429341] [2024-06-20 16:00:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:57,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:57,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:57,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:57,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1268 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:57,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:57,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:57,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:58,311 INFO L124 PetriNetUnfolderBase]: 1670/2761 cut-off events. [2024-06-20 16:00:58,311 INFO L125 PetriNetUnfolderBase]: For 77733/77733 co-relation queries the response was YES. [2024-06-20 16:00:58,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 2761 events. 1670/2761 cut-off events. For 77733/77733 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15527 event pairs, 455 based on Foata normal form. 6/2764 useless extension candidates. Maximal degree in co-relation 16760. Up to 2508 conditions per place. [2024-06-20 16:00:58,330 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2024-06-20 16:00:58,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 159 transitions, 1650 flow [2024-06-20 16:00:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:00:58,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:00:58,331 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1268 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:00:58,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 159 transitions, 1650 flow [2024-06-20 16:00:58,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1586 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:58,372 INFO L231 Difference]: Finished difference. Result has 131 places, 145 transitions, 1295 flow [2024-06-20 16:00:58,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=131, PETRI_TRANSITIONS=145} [2024-06-20 16:00:58,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-20 16:00:58,372 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 145 transitions, 1295 flow [2024-06-20 16:00:58,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:58,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:58,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:58,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:00:58,373 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)] === [2024-06-20 16:00:58,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 398530624, now seen corresponding path program 2 times [2024-06-20 16:00:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404209976] [2024-06-20 16:00:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:58,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:00:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:00:59,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:00:59,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404209976] [2024-06-20 16:00:59,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404209976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:00:59,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:00:59,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:00:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97571790] [2024-06-20 16:00:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:00:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:00:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:00:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:00:59,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:00:59,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:00:59,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 145 transitions, 1295 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:59,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:00:59,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:00:59,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:00:59,821 INFO L124 PetriNetUnfolderBase]: 1690/2794 cut-off events. [2024-06-20 16:00:59,822 INFO L125 PetriNetUnfolderBase]: For 83236/83239 co-relation queries the response was YES. [2024-06-20 16:00:59,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17538 conditions, 2794 events. 1690/2794 cut-off events. For 83236/83239 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15790 event pairs, 459 based on Foata normal form. 8/2798 useless extension candidates. Maximal degree in co-relation 17480. Up to 2527 conditions per place. [2024-06-20 16:00:59,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 130 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2024-06-20 16:00:59,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 161 transitions, 1693 flow [2024-06-20 16:00:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:00:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:00:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:00:59,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:00:59,862 INFO L175 Difference]: Start difference. First operand has 131 places, 145 transitions, 1295 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:00:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 161 transitions, 1693 flow [2024-06-20 16:00:59,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 161 transitions, 1630 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:00:59,913 INFO L231 Difference]: Finished difference. Result has 133 places, 149 transitions, 1341 flow [2024-06-20 16:00:59,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=133, PETRI_TRANSITIONS=149} [2024-06-20 16:00:59,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 16:00:59,914 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 149 transitions, 1341 flow [2024-06-20 16:00:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:00:59,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:00:59,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:00:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:00:59,915 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)] === [2024-06-20 16:00:59,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:00:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 398767774, now seen corresponding path program 3 times [2024-06-20 16:00:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:00:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266832990] [2024-06-20 16:00:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:00:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:00:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266832990] [2024-06-20 16:01:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266832990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271825648] [2024-06-20 16:01:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:01,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:01:01,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 149 transitions, 1341 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:01,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:01:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:01,477 INFO L124 PetriNetUnfolderBase]: 1705/2807 cut-off events. [2024-06-20 16:01:01,477 INFO L125 PetriNetUnfolderBase]: For 83793/83796 co-relation queries the response was YES. [2024-06-20 16:01:01,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 2807 events. 1705/2807 cut-off events. For 83793/83796 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15780 event pairs, 471 based on Foata normal form. 4/2807 useless extension candidates. Maximal degree in co-relation 17943. Up to 2533 conditions per place. [2024-06-20 16:01:01,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-20 16:01:01,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 171 transitions, 1814 flow [2024-06-20 16:01:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:01:01,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 16:01:01,500 INFO L175 Difference]: Start difference. First operand has 133 places, 149 transitions, 1341 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:01:01,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 171 transitions, 1814 flow [2024-06-20 16:01:01,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 171 transitions, 1690 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:01,545 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1437 flow [2024-06-20 16:01:01,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-20 16:01:01,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 16:01:01,546 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1437 flow [2024-06-20 16:01:01,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:01,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:01,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:01,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:01:01,546 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:01,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1357311082, now seen corresponding path program 1 times [2024-06-20 16:01:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:01,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433919667] [2024-06-20 16:01:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:02,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:02,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433919667] [2024-06-20 16:01:02,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433919667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:02,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238510259] [2024-06-20 16:01:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:02,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:02,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:02,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:02,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1437 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:02,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:02,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:02,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:03,003 INFO L124 PetriNetUnfolderBase]: 1823/2931 cut-off events. [2024-06-20 16:01:03,004 INFO L125 PetriNetUnfolderBase]: For 89445/89448 co-relation queries the response was YES. [2024-06-20 16:01:03,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19091 conditions, 2931 events. 1823/2931 cut-off events. For 89445/89448 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16062 event pairs, 500 based on Foata normal form. 5/2932 useless extension candidates. Maximal degree in co-relation 19030. Up to 2687 conditions per place. [2024-06-20 16:01:03,026 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 154 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2024-06-20 16:01:03,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1957 flow [2024-06-20 16:01:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:01:03,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:01:03,028 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1437 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:01:03,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1957 flow [2024-06-20 16:01:03,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1908 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:03,084 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1544 flow [2024-06-20 16:01:03,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1544, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-20 16:01:03,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 16:01:03,084 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1544 flow [2024-06-20 16:01:03,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:03,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:03,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:03,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:01:03,085 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)] === [2024-06-20 16:01:03,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1360855219, now seen corresponding path program 1 times [2024-06-20 16:01:03,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:03,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278754564] [2024-06-20 16:01:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:03,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:03,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278754564] [2024-06-20 16:01:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278754564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:03,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:03,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:03,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892626884] [2024-06-20 16:01:03,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:03,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:03,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1544 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:03,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:03,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:04,266 INFO L124 PetriNetUnfolderBase]: 1843/2963 cut-off events. [2024-06-20 16:01:04,267 INFO L125 PetriNetUnfolderBase]: For 96585/96588 co-relation queries the response was YES. [2024-06-20 16:01:04,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20100 conditions, 2963 events. 1843/2963 cut-off events. For 96585/96588 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16309 event pairs, 496 based on Foata normal form. 6/2965 useless extension candidates. Maximal degree in co-relation 20037. Up to 2721 conditions per place. [2024-06-20 16:01:04,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 24 changer transitions 0/189 dead transitions. [2024-06-20 16:01:04,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 2033 flow [2024-06-20 16:01:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:01:04,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:01:04,291 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1544 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:01:04,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 2033 flow [2024-06-20 16:01:04,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 189 transitions, 1911 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:04,349 INFO L231 Difference]: Finished difference. Result has 142 places, 170 transitions, 1542 flow [2024-06-20 16:01:04,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=142, PETRI_TRANSITIONS=170} [2024-06-20 16:01:04,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 16:01:04,350 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 170 transitions, 1542 flow [2024-06-20 16:01:04,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:04,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:04,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:04,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:01:04,351 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:04,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973481, now seen corresponding path program 2 times [2024-06-20 16:01:04,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:04,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926769154] [2024-06-20 16:01:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:04,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:05,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:05,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926769154] [2024-06-20 16:01:05,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926769154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320453195] [2024-06-20 16:01:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:05,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:05,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 170 transitions, 1542 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:05,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:05,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:05,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:05,605 INFO L124 PetriNetUnfolderBase]: 1847/2971 cut-off events. [2024-06-20 16:01:05,606 INFO L125 PetriNetUnfolderBase]: For 100581/100584 co-relation queries the response was YES. [2024-06-20 16:01:05,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20203 conditions, 2971 events. 1847/2971 cut-off events. For 100581/100584 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16388 event pairs, 497 based on Foata normal form. 6/2973 useless extension candidates. Maximal degree in co-relation 20139. Up to 2670 conditions per place. [2024-06-20 16:01:05,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 36 changer transitions 0/191 dead transitions. [2024-06-20 16:01:05,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 2110 flow [2024-06-20 16:01:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:01:05,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:01:05,631 INFO L175 Difference]: Start difference. First operand has 142 places, 170 transitions, 1542 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:01:05,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 2110 flow [2024-06-20 16:01:05,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 191 transitions, 2047 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:05,690 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 1618 flow [2024-06-20 16:01:05,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2024-06-20 16:01:05,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 16:01:05,690 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 1618 flow [2024-06-20 16:01:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:05,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:05,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:01:05,691 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:05,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1283965948, now seen corresponding path program 2 times [2024-06-20 16:01:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943261746] [2024-06-20 16:01:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943261746] [2024-06-20 16:01:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943261746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:06,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:06,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854950446] [2024-06-20 16:01:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:06,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:06,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:06,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 1618 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:06,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:06,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:06,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:07,327 INFO L124 PetriNetUnfolderBase]: 1906/3063 cut-off events. [2024-06-20 16:01:07,328 INFO L125 PetriNetUnfolderBase]: For 108730/108733 co-relation queries the response was YES. [2024-06-20 16:01:07,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21151 conditions, 3063 events. 1906/3063 cut-off events. For 108730/108733 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17011 event pairs, 496 based on Foata normal form. 5/3064 useless extension candidates. Maximal degree in co-relation 21086. Up to 2680 conditions per place. [2024-06-20 16:01:07,356 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 150 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-20 16:01:07,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 203 transitions, 2416 flow [2024-06-20 16:01:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:01:07,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-20 16:01:07,357 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 1618 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:01:07,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 203 transitions, 2416 flow [2024-06-20 16:01:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 2327 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:07,424 INFO L231 Difference]: Finished difference. Result has 151 places, 183 transitions, 1838 flow [2024-06-20 16:01:07,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=151, PETRI_TRANSITIONS=183} [2024-06-20 16:01:07,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 16:01:07,425 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 183 transitions, 1838 flow [2024-06-20 16:01:07,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:07,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:07,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:01:07,426 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1366577075, now seen corresponding path program 1 times [2024-06-20 16:01:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:07,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939552411] [2024-06-20 16:01:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:08,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939552411] [2024-06-20 16:01:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939552411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:08,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294373834] [2024-06-20 16:01:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:08,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:08,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:08,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 183 transitions, 1838 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:08,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:08,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:09,073 INFO L124 PetriNetUnfolderBase]: 1916/3076 cut-off events. [2024-06-20 16:01:09,073 INFO L125 PetriNetUnfolderBase]: For 119212/119212 co-relation queries the response was YES. [2024-06-20 16:01:09,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22302 conditions, 3076 events. 1916/3076 cut-off events. For 119212/119212 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17025 event pairs, 493 based on Foata normal form. 2/3075 useless extension candidates. Maximal degree in co-relation 22235. Up to 2888 conditions per place. [2024-06-20 16:01:09,099 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 18 changer transitions 0/203 dead transitions. [2024-06-20 16:01:09,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 203 transitions, 2352 flow [2024-06-20 16:01:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:01:09,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:01:09,100 INFO L175 Difference]: Start difference. First operand has 151 places, 183 transitions, 1838 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:01:09,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 203 transitions, 2352 flow [2024-06-20 16:01:09,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 203 transitions, 2214 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:09,177 INFO L231 Difference]: Finished difference. Result has 155 places, 186 transitions, 1820 flow [2024-06-20 16:01:09,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1820, PETRI_PLACES=155, PETRI_TRANSITIONS=186} [2024-06-20 16:01:09,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-20 16:01:09,178 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 186 transitions, 1820 flow [2024-06-20 16:01:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:09,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:09,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:09,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:01:09,179 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)] === [2024-06-20 16:01:09,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:09,179 INFO L85 PathProgramCache]: Analyzing trace with hash -907080086, now seen corresponding path program 3 times [2024-06-20 16:01:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:09,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720863952] [2024-06-20 16:01:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:10,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:10,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720863952] [2024-06-20 16:01:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720863952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:10,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134128584] [2024-06-20 16:01:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:10,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:10,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 186 transitions, 1820 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:10,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:10,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:10,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:11,157 INFO L124 PetriNetUnfolderBase]: 1958/3140 cut-off events. [2024-06-20 16:01:11,158 INFO L125 PetriNetUnfolderBase]: For 127198/127201 co-relation queries the response was YES. [2024-06-20 16:01:11,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23076 conditions, 3140 events. 1958/3140 cut-off events. For 127198/127201 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17463 event pairs, 489 based on Foata normal form. 4/3139 useless extension candidates. Maximal degree in co-relation 23007. Up to 2716 conditions per place. [2024-06-20 16:01:11,185 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2024-06-20 16:01:11,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 221 transitions, 2754 flow [2024-06-20 16:01:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:01:11,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:01:11,186 INFO L175 Difference]: Start difference. First operand has 155 places, 186 transitions, 1820 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:01:11,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 221 transitions, 2754 flow [2024-06-20 16:01:11,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 221 transitions, 2656 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:11,265 INFO L231 Difference]: Finished difference. Result has 158 places, 201 transitions, 2184 flow [2024-06-20 16:01:11,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2184, PETRI_PLACES=158, PETRI_TRANSITIONS=201} [2024-06-20 16:01:11,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 16:01:11,266 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 201 transitions, 2184 flow [2024-06-20 16:01:11,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:11,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:11,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:11,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:01:11,266 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)] === [2024-06-20 16:01:11,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:11,267 INFO L85 PathProgramCache]: Analyzing trace with hash 16651123, now seen corresponding path program 3 times [2024-06-20 16:01:11,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:11,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541995954] [2024-06-20 16:01:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:11,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:11,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:11,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541995954] [2024-06-20 16:01:11,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541995954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:11,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:11,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774391693] [2024-06-20 16:01:11,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:11,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:11,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:11,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 201 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:11,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:11,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:11,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:12,540 INFO L124 PetriNetUnfolderBase]: 1944/3114 cut-off events. [2024-06-20 16:01:12,540 INFO L125 PetriNetUnfolderBase]: For 133148/133148 co-relation queries the response was YES. [2024-06-20 16:01:12,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23771 conditions, 3114 events. 1944/3114 cut-off events. For 133148/133148 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17258 event pairs, 509 based on Foata normal form. 2/3109 useless extension candidates. Maximal degree in co-relation 23700. Up to 2868 conditions per place. [2024-06-20 16:01:12,567 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2024-06-20 16:01:12,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 218 transitions, 2672 flow [2024-06-20 16:01:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:01:12,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:01:12,568 INFO L175 Difference]: Start difference. First operand has 158 places, 201 transitions, 2184 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:01:12,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 218 transitions, 2672 flow [2024-06-20 16:01:12,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 218 transitions, 2496 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:12,668 INFO L231 Difference]: Finished difference. Result has 162 places, 201 transitions, 2060 flow [2024-06-20 16:01:12,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2060, PETRI_PLACES=162, PETRI_TRANSITIONS=201} [2024-06-20 16:01:12,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 16:01:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 201 transitions, 2060 flow [2024-06-20 16:01:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:01:12,670 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)] === [2024-06-20 16:01:12,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 862441633, now seen corresponding path program 4 times [2024-06-20 16:01:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263015849] [2024-06-20 16:01:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:12,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:13,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263015849] [2024-06-20 16:01:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263015849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:13,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:13,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584070307] [2024-06-20 16:01:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:13,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:13,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 201 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:13,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:13,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:13,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:13,941 INFO L124 PetriNetUnfolderBase]: 1954/3128 cut-off events. [2024-06-20 16:01:13,941 INFO L125 PetriNetUnfolderBase]: For 136717/136717 co-relation queries the response was YES. [2024-06-20 16:01:13,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23851 conditions, 3128 events. 1954/3128 cut-off events. For 136717/136717 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17330 event pairs, 505 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 23778. Up to 2856 conditions per place. [2024-06-20 16:01:13,968 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 32 changer transitions 0/219 dead transitions. [2024-06-20 16:01:13,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 219 transitions, 2614 flow [2024-06-20 16:01:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:01:13,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:01:13,969 INFO L175 Difference]: Start difference. First operand has 162 places, 201 transitions, 2060 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:01:13,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 219 transitions, 2614 flow [2024-06-20 16:01:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2474 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 16:01:14,059 INFO L231 Difference]: Finished difference. Result has 159 places, 204 transitions, 2048 flow [2024-06-20 16:01:14,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2048, PETRI_PLACES=159, PETRI_TRANSITIONS=204} [2024-06-20 16:01:14,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-20 16:01:14,060 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 204 transitions, 2048 flow [2024-06-20 16:01:14,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:14,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:14,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:14,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:01:14,061 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)] === [2024-06-20 16:01:14,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1520373615, now seen corresponding path program 5 times [2024-06-20 16:01:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:14,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178261148] [2024-06-20 16:01:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:14,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:14,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:14,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178261148] [2024-06-20 16:01:14,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178261148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:14,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:14,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:14,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948902440] [2024-06-20 16:01:14,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:14,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:14,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:14,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:14,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 204 transitions, 2048 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:14,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:14,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:14,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:15,409 INFO L124 PetriNetUnfolderBase]: 1964/3145 cut-off events. [2024-06-20 16:01:15,409 INFO L125 PetriNetUnfolderBase]: For 142330/142333 co-relation queries the response was YES. [2024-06-20 16:01:15,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24102 conditions, 3145 events. 1964/3145 cut-off events. For 142330/142333 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17466 event pairs, 523 based on Foata normal form. 4/3141 useless extension candidates. Maximal degree in co-relation 24028. Up to 2765 conditions per place. [2024-06-20 16:01:15,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2024-06-20 16:01:15,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 221 transitions, 2704 flow [2024-06-20 16:01:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:01:15,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:01:15,440 INFO L175 Difference]: Start difference. First operand has 159 places, 204 transitions, 2048 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:01:15,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 221 transitions, 2704 flow [2024-06-20 16:01:15,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 221 transitions, 2608 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:15,550 INFO L231 Difference]: Finished difference. Result has 161 places, 207 transitions, 2126 flow [2024-06-20 16:01:15,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2126, PETRI_PLACES=161, PETRI_TRANSITIONS=207} [2024-06-20 16:01:15,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 16:01:15,552 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 207 transitions, 2126 flow [2024-06-20 16:01:15,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:15,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:15,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:01:15,552 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)] === [2024-06-20 16:01:15,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash -536178509, now seen corresponding path program 6 times [2024-06-20 16:01:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:15,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881585631] [2024-06-20 16:01:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:16,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881585631] [2024-06-20 16:01:16,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881585631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:16,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:01:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132096309] [2024-06-20 16:01:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:01:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:01:16,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:01:16,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:16,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 207 transitions, 2126 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:16,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:16,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:16,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:16,983 INFO L124 PetriNetUnfolderBase]: 1948/3121 cut-off events. [2024-06-20 16:01:16,983 INFO L125 PetriNetUnfolderBase]: For 146531/146534 co-relation queries the response was YES. [2024-06-20 16:01:16,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 3121 events. 1948/3121 cut-off events. For 146531/146534 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17315 event pairs, 517 based on Foata normal form. 6/3119 useless extension candidates. Maximal degree in co-relation 23882. Up to 2752 conditions per place. [2024-06-20 16:01:17,011 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 51 changer transitions 0/220 dead transitions. [2024-06-20 16:01:17,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 220 transitions, 2642 flow [2024-06-20 16:01:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:01:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:01:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:01:17,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:01:17,013 INFO L175 Difference]: Start difference. First operand has 161 places, 207 transitions, 2126 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:01:17,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 220 transitions, 2642 flow [2024-06-20 16:01:17,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 220 transitions, 2467 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:17,102 INFO L231 Difference]: Finished difference. Result has 164 places, 207 transitions, 2061 flow [2024-06-20 16:01:17,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2061, PETRI_PLACES=164, PETRI_TRANSITIONS=207} [2024-06-20 16:01:17,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 16:01:17,103 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 207 transitions, 2061 flow [2024-06-20 16:01:17,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:17,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:17,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:01:17,104 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)] === [2024-06-20 16:01:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash -523283563, now seen corresponding path program 2 times [2024-06-20 16:01:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:17,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948559510] [2024-06-20 16:01:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948559510] [2024-06-20 16:01:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948559510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:18,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:18,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424672162] [2024-06-20 16:01:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:18,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:18,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 207 transitions, 2061 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:18,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:18,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:18,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:19,047 INFO L124 PetriNetUnfolderBase]: 1961/3140 cut-off events. [2024-06-20 16:01:19,047 INFO L125 PetriNetUnfolderBase]: For 150925/150931 co-relation queries the response was YES. [2024-06-20 16:01:19,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24184 conditions, 3140 events. 1961/3140 cut-off events. For 150925/150931 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17392 event pairs, 496 based on Foata normal form. 5/3141 useless extension candidates. Maximal degree in co-relation 24108. Up to 2925 conditions per place. [2024-06-20 16:01:19,078 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 38 changer transitions 0/232 dead transitions. [2024-06-20 16:01:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 232 transitions, 2946 flow [2024-06-20 16:01:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:01:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:01:19,079 INFO L175 Difference]: Start difference. First operand has 164 places, 207 transitions, 2061 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:01:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 232 transitions, 2946 flow [2024-06-20 16:01:19,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 232 transitions, 2817 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:19,215 INFO L231 Difference]: Finished difference. Result has 166 places, 219 transitions, 2278 flow [2024-06-20 16:01:19,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=166, PETRI_TRANSITIONS=219} [2024-06-20 16:01:19,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-20 16:01:19,216 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 219 transitions, 2278 flow [2024-06-20 16:01:19,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:19,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:19,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:19,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:01:19,217 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)] === [2024-06-20 16:01:19,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1507628802, now seen corresponding path program 4 times [2024-06-20 16:01:19,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:19,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359736218] [2024-06-20 16:01:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:19,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:20,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:20,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359736218] [2024-06-20 16:01:20,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359736218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:20,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:20,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788266502] [2024-06-20 16:01:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:20,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:20,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 219 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:20,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:20,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:20,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:21,096 INFO L124 PetriNetUnfolderBase]: 2020/3231 cut-off events. [2024-06-20 16:01:21,096 INFO L125 PetriNetUnfolderBase]: For 165242/165245 co-relation queries the response was YES. [2024-06-20 16:01:21,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25461 conditions, 3231 events. 2020/3231 cut-off events. For 165242/165245 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 17963 event pairs, 520 based on Foata normal form. 5/3228 useless extension candidates. Maximal degree in co-relation 25383. Up to 2684 conditions per place. [2024-06-20 16:01:21,128 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 163 selfloop transitions, 89 changer transitions 0/257 dead transitions. [2024-06-20 16:01:21,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 257 transitions, 3418 flow [2024-06-20 16:01:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:01:21,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 16:01:21,130 INFO L175 Difference]: Start difference. First operand has 166 places, 219 transitions, 2278 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:01:21,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 257 transitions, 3418 flow [2024-06-20 16:01:21,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 257 transitions, 3316 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:21,303 INFO L231 Difference]: Finished difference. Result has 173 places, 242 transitions, 2813 flow [2024-06-20 16:01:21,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=173, PETRI_TRANSITIONS=242} [2024-06-20 16:01:21,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-20 16:01:21,303 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 242 transitions, 2813 flow [2024-06-20 16:01:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:21,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:21,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:01:21,304 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:21,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -522838093, now seen corresponding path program 3 times [2024-06-20 16:01:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:21,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181061937] [2024-06-20 16:01:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:22,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181061937] [2024-06-20 16:01:22,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181061937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:22,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:22,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145979317] [2024-06-20 16:01:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:22,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:22,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:22,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:22,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 242 transitions, 2813 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:22,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:22,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:22,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:23,398 INFO L124 PetriNetUnfolderBase]: 2017/3225 cut-off events. [2024-06-20 16:01:23,398 INFO L125 PetriNetUnfolderBase]: For 174496/174496 co-relation queries the response was YES. [2024-06-20 16:01:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26671 conditions, 3225 events. 2017/3225 cut-off events. For 174496/174496 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 17937 event pairs, 490 based on Foata normal form. 1/3223 useless extension candidates. Maximal degree in co-relation 26589. Up to 3044 conditions per place. [2024-06-20 16:01:23,429 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 18 changer transitions 0/252 dead transitions. [2024-06-20 16:01:23,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 252 transitions, 3331 flow [2024-06-20 16:01:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:01:23,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:01:23,432 INFO L175 Difference]: Start difference. First operand has 173 places, 242 transitions, 2813 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:01:23,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 252 transitions, 3331 flow [2024-06-20 16:01:23,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 252 transitions, 3078 flow, removed 113 selfloop flow, removed 3 redundant places. [2024-06-20 16:01:23,612 INFO L231 Difference]: Finished difference. Result has 178 places, 242 transitions, 2602 flow [2024-06-20 16:01:23,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2602, PETRI_PLACES=178, PETRI_TRANSITIONS=242} [2024-06-20 16:01:23,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 16:01:23,612 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 242 transitions, 2602 flow [2024-06-20 16:01:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:23,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:23,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:01:23,613 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)] === [2024-06-20 16:01:23,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash -536182136, now seen corresponding path program 5 times [2024-06-20 16:01:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533085794] [2024-06-20 16:01:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:24,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:24,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533085794] [2024-06-20 16:01:24,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533085794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:24,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:24,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:24,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857212738] [2024-06-20 16:01:24,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:24,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:24,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:24,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:24,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:24,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 242 transitions, 2602 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:24,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:24,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:24,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:25,414 INFO L124 PetriNetUnfolderBase]: 2032/3250 cut-off events. [2024-06-20 16:01:25,414 INFO L125 PetriNetUnfolderBase]: For 178953/178956 co-relation queries the response was YES. [2024-06-20 16:01:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26246 conditions, 3250 events. 2032/3250 cut-off events. For 178953/178956 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18102 event pairs, 519 based on Foata normal form. 5/3247 useless extension candidates. Maximal degree in co-relation 26163. Up to 2860 conditions per place. [2024-06-20 16:01:25,444 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 58 changer transitions 0/260 dead transitions. [2024-06-20 16:01:25,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 260 transitions, 3260 flow [2024-06-20 16:01:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:01:25,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:01:25,448 INFO L175 Difference]: Start difference. First operand has 178 places, 242 transitions, 2602 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:01:25,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 260 transitions, 3260 flow [2024-06-20 16:01:25,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 260 transitions, 3202 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:25,616 INFO L231 Difference]: Finished difference. Result has 180 places, 247 transitions, 2790 flow [2024-06-20 16:01:25,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2790, PETRI_PLACES=180, PETRI_TRANSITIONS=247} [2024-06-20 16:01:25,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-20 16:01:25,617 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 247 transitions, 2790 flow [2024-06-20 16:01:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:25,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:25,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:01:25,617 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)] === [2024-06-20 16:01:25,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -536170573, now seen corresponding path program 4 times [2024-06-20 16:01:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655804848] [2024-06-20 16:01:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655804848] [2024-06-20 16:01:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655804848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:26,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:26,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:26,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074703741] [2024-06-20 16:01:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:26,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:26,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:26,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:26,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 247 transitions, 2790 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:26,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:26,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:26,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:27,249 INFO L124 PetriNetUnfolderBase]: 2034/3256 cut-off events. [2024-06-20 16:01:27,249 INFO L125 PetriNetUnfolderBase]: For 185677/185683 co-relation queries the response was YES. [2024-06-20 16:01:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26708 conditions, 3256 events. 2034/3256 cut-off events. For 185677/185683 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18202 event pairs, 498 based on Foata normal form. 6/3258 useless extension candidates. Maximal degree in co-relation 26624. Up to 3047 conditions per place. [2024-06-20 16:01:27,282 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 24 changer transitions 0/262 dead transitions. [2024-06-20 16:01:27,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 262 transitions, 3429 flow [2024-06-20 16:01:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:01:27,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:01:27,284 INFO L175 Difference]: Start difference. First operand has 180 places, 247 transitions, 2790 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:01:27,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 262 transitions, 3429 flow [2024-06-20 16:01:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 262 transitions, 3185 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:27,464 INFO L231 Difference]: Finished difference. Result has 182 places, 250 transitions, 2698 flow [2024-06-20 16:01:27,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=182, PETRI_TRANSITIONS=250} [2024-06-20 16:01:27,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 16:01:27,465 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 250 transitions, 2698 flow [2024-06-20 16:01:27,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:27,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:27,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:01:27,466 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)] === [2024-06-20 16:01:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -968479258, now seen corresponding path program 6 times [2024-06-20 16:01:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480709379] [2024-06-20 16:01:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480709379] [2024-06-20 16:01:28,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480709379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:28,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:28,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650192541] [2024-06-20 16:01:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:28,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:28,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:28,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 250 transitions, 2698 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:28,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:28,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:28,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:29,132 INFO L124 PetriNetUnfolderBase]: 2045/3271 cut-off events. [2024-06-20 16:01:29,132 INFO L125 PetriNetUnfolderBase]: For 187778/187781 co-relation queries the response was YES. [2024-06-20 16:01:29,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26851 conditions, 3271 events. 2045/3271 cut-off events. For 187778/187781 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18175 event pairs, 516 based on Foata normal form. 5/3268 useless extension candidates. Maximal degree in co-relation 26766. Up to 2835 conditions per place. [2024-06-20 16:01:29,165 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 64 changer transitions 0/270 dead transitions. [2024-06-20 16:01:29,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 270 transitions, 3535 flow [2024-06-20 16:01:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:01:29,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:01:29,167 INFO L175 Difference]: Start difference. First operand has 182 places, 250 transitions, 2698 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:01:29,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 270 transitions, 3535 flow [2024-06-20 16:01:29,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 270 transitions, 3397 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:29,349 INFO L231 Difference]: Finished difference. Result has 185 places, 257 transitions, 2901 flow [2024-06-20 16:01:29,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2901, PETRI_PLACES=185, PETRI_TRANSITIONS=257} [2024-06-20 16:01:29,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 16:01:29,350 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 257 transitions, 2901 flow [2024-06-20 16:01:29,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:29,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:29,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:29,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:01:29,350 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)] === [2024-06-20 16:01:29,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:29,351 INFO L85 PathProgramCache]: Analyzing trace with hash 24367984, now seen corresponding path program 1 times [2024-06-20 16:01:29,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:29,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755792423] [2024-06-20 16:01:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:30,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755792423] [2024-06-20 16:01:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755792423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:30,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:30,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227855992] [2024-06-20 16:01:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:30,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:30,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:01:30,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 257 transitions, 2901 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:30,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:30,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:01:30,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:31,239 INFO L124 PetriNetUnfolderBase]: 2003/3241 cut-off events. [2024-06-20 16:01:31,239 INFO L125 PetriNetUnfolderBase]: For 199073/199073 co-relation queries the response was YES. [2024-06-20 16:01:31,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27230 conditions, 3241 events. 2003/3241 cut-off events. For 199073/199073 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18281 event pairs, 467 based on Foata normal form. 3/3241 useless extension candidates. Maximal degree in co-relation 27143. Up to 2878 conditions per place. [2024-06-20 16:01:31,269 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 18 changer transitions 0/277 dead transitions. [2024-06-20 16:01:31,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 277 transitions, 3521 flow [2024-06-20 16:01:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:01:31,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:01:31,271 INFO L175 Difference]: Start difference. First operand has 185 places, 257 transitions, 2901 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:01:31,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 277 transitions, 3521 flow [2024-06-20 16:01:31,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 277 transitions, 3339 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:31,490 INFO L231 Difference]: Finished difference. Result has 189 places, 260 transitions, 2829 flow [2024-06-20 16:01:31,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2829, PETRI_PLACES=189, PETRI_TRANSITIONS=260} [2024-06-20 16:01:31,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-20 16:01:31,490 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 260 transitions, 2829 flow [2024-06-20 16:01:31,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:31,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:31,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:31,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:01:31,491 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)] === [2024-06-20 16:01:31,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash 862455304, now seen corresponding path program 2 times [2024-06-20 16:01:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:31,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860559610] [2024-06-20 16:01:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860559610] [2024-06-20 16:01:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860559610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:32,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:32,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310755843] [2024-06-20 16:01:32,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:32,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:33,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:01:33,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 260 transitions, 2829 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:33,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:33,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:01:33,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:33,808 INFO L124 PetriNetUnfolderBase]: 2013/3259 cut-off events. [2024-06-20 16:01:33,808 INFO L125 PetriNetUnfolderBase]: For 205183/205183 co-relation queries the response was YES. [2024-06-20 16:01:33,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27576 conditions, 3259 events. 2013/3259 cut-off events. For 205183/205183 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18456 event pairs, 463 based on Foata normal form. 2/3258 useless extension candidates. Maximal degree in co-relation 27487. Up to 2890 conditions per place. [2024-06-20 16:01:33,840 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 22 changer transitions 0/278 dead transitions. [2024-06-20 16:01:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 278 transitions, 3446 flow [2024-06-20 16:01:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:01:33,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:01:33,842 INFO L175 Difference]: Start difference. First operand has 189 places, 260 transitions, 2829 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:01:33,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 278 transitions, 3446 flow [2024-06-20 16:01:34,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 278 transitions, 3364 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:34,020 INFO L231 Difference]: Finished difference. Result has 192 places, 264 transitions, 2881 flow [2024-06-20 16:01:34,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2881, PETRI_PLACES=192, PETRI_TRANSITIONS=264} [2024-06-20 16:01:34,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-20 16:01:34,024 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 264 transitions, 2881 flow [2024-06-20 16:01:34,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:34,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:34,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:34,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:01:34,025 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)] === [2024-06-20 16:01:34,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1514795754, now seen corresponding path program 3 times [2024-06-20 16:01:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:34,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38073256] [2024-06-20 16:01:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:35,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:35,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38073256] [2024-06-20 16:01:35,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38073256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:35,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:35,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:35,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772661453] [2024-06-20 16:01:35,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:35,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:35,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:35,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:01:35,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 264 transitions, 2881 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:35,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:35,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:01:35,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:36,115 INFO L124 PetriNetUnfolderBase]: 2033/3291 cut-off events. [2024-06-20 16:01:36,115 INFO L125 PetriNetUnfolderBase]: For 216460/216463 co-relation queries the response was YES. [2024-06-20 16:01:36,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28301 conditions, 3291 events. 2033/3291 cut-off events. For 216460/216463 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18663 event pairs, 465 based on Foata normal form. 5/3292 useless extension candidates. Maximal degree in co-relation 28210. Up to 2895 conditions per place. [2024-06-20 16:01:36,153 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 34 changer transitions 0/284 dead transitions. [2024-06-20 16:01:36,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 284 transitions, 3691 flow [2024-06-20 16:01:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:01:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:01:36,168 INFO L175 Difference]: Start difference. First operand has 192 places, 264 transitions, 2881 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:01:36,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 284 transitions, 3691 flow [2024-06-20 16:01:36,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 284 transitions, 3610 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:36,380 INFO L231 Difference]: Finished difference. Result has 195 places, 271 transitions, 3037 flow [2024-06-20 16:01:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3037, PETRI_PLACES=195, PETRI_TRANSITIONS=271} [2024-06-20 16:01:36,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-20 16:01:36,381 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 271 transitions, 3037 flow [2024-06-20 16:01:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:36,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:01:36,382 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)] === [2024-06-20 16:01:36,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -523099268, now seen corresponding path program 4 times [2024-06-20 16:01:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823561694] [2024-06-20 16:01:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:37,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:37,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823561694] [2024-06-20 16:01:37,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823561694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:37,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:37,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:37,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215576010] [2024-06-20 16:01:37,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:37,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:01:37,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 271 transitions, 3037 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:37,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:37,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:01:37,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:38,649 INFO L124 PetriNetUnfolderBase]: 2027/3283 cut-off events. [2024-06-20 16:01:38,649 INFO L125 PetriNetUnfolderBase]: For 221068/221071 co-relation queries the response was YES. [2024-06-20 16:01:38,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28594 conditions, 3283 events. 2027/3283 cut-off events. For 221068/221071 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18608 event pairs, 465 based on Foata normal form. 4/3283 useless extension candidates. Maximal degree in co-relation 28502. Up to 2876 conditions per place. [2024-06-20 16:01:38,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 45 changer transitions 0/287 dead transitions. [2024-06-20 16:01:38,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 3733 flow [2024-06-20 16:01:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:01:38,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:01:38,685 INFO L175 Difference]: Start difference. First operand has 195 places, 271 transitions, 3037 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:01:38,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 3733 flow [2024-06-20 16:01:38,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 287 transitions, 3590 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-20 16:01:38,925 INFO L231 Difference]: Finished difference. Result has 200 places, 276 transitions, 3161 flow [2024-06-20 16:01:38,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3161, PETRI_PLACES=200, PETRI_TRANSITIONS=276} [2024-06-20 16:01:38,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-20 16:01:38,925 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 276 transitions, 3161 flow [2024-06-20 16:01:38,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:38,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:38,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:01:38,926 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:38,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash -522822221, now seen corresponding path program 1 times [2024-06-20 16:01:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:38,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115554952] [2024-06-20 16:01:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:40,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115554952] [2024-06-20 16:01:40,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115554952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:40,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:40,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169828461] [2024-06-20 16:01:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:41,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:41,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 276 transitions, 3161 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:41,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:41,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:41,786 INFO L124 PetriNetUnfolderBase]: 2082/3337 cut-off events. [2024-06-20 16:01:41,786 INFO L125 PetriNetUnfolderBase]: For 227545/227545 co-relation queries the response was YES. [2024-06-20 16:01:41,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29170 conditions, 3337 events. 2082/3337 cut-off events. For 227545/227545 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18676 event pairs, 486 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 29075. Up to 3130 conditions per place. [2024-06-20 16:01:41,822 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 265 selfloop transitions, 20 changer transitions 0/290 dead transitions. [2024-06-20 16:01:41,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 290 transitions, 3839 flow [2024-06-20 16:01:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:01:41,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:01:41,823 INFO L175 Difference]: Start difference. First operand has 200 places, 276 transitions, 3161 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:01:41,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 290 transitions, 3839 flow [2024-06-20 16:01:42,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 290 transitions, 3718 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:42,051 INFO L231 Difference]: Finished difference. Result has 204 places, 278 transitions, 3169 flow [2024-06-20 16:01:42,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3169, PETRI_PLACES=204, PETRI_TRANSITIONS=278} [2024-06-20 16:01:42,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 16:01:42,052 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 278 transitions, 3169 flow [2024-06-20 16:01:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:42,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:42,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:42,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:01:42,053 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:42,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1444051963, now seen corresponding path program 1 times [2024-06-20 16:01:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838494826] [2024-06-20 16:01:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:42,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838494826] [2024-06-20 16:01:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838494826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:42,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:42,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59424050] [2024-06-20 16:01:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:42,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:42,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:42,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 278 transitions, 3169 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:43,578 INFO L124 PetriNetUnfolderBase]: 2118/3398 cut-off events. [2024-06-20 16:01:43,578 INFO L125 PetriNetUnfolderBase]: For 243997/244000 co-relation queries the response was YES. [2024-06-20 16:01:43,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29748 conditions, 3398 events. 2118/3398 cut-off events. For 243997/244000 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19058 event pairs, 364 based on Foata normal form. 12/3406 useless extension candidates. Maximal degree in co-relation 29652. Up to 3036 conditions per place. [2024-06-20 16:01:43,612 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 26 changer transitions 0/312 dead transitions. [2024-06-20 16:01:43,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 312 transitions, 4009 flow [2024-06-20 16:01:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:01:43,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 16:01:43,614 INFO L175 Difference]: Start difference. First operand has 204 places, 278 transitions, 3169 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:01:43,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 312 transitions, 4009 flow [2024-06-20 16:01:43,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 312 transitions, 3872 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 16:01:43,818 INFO L231 Difference]: Finished difference. Result has 205 places, 282 transitions, 3199 flow [2024-06-20 16:01:43,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3199, PETRI_PLACES=205, PETRI_TRANSITIONS=282} [2024-06-20 16:01:43,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-20 16:01:43,819 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 282 transitions, 3199 flow [2024-06-20 16:01:43,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:43,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:43,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:43,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:01:43,819 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:43,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1443812953, now seen corresponding path program 2 times [2024-06-20 16:01:43,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:43,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58803610] [2024-06-20 16:01:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:43,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:44,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58803610] [2024-06-20 16:01:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58803610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970546181] [2024-06-20 16:01:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:44,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:44,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:44,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:44,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 282 transitions, 3199 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:44,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:44,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:44,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:45,611 INFO L124 PetriNetUnfolderBase]: 2162/3466 cut-off events. [2024-06-20 16:01:45,611 INFO L125 PetriNetUnfolderBase]: For 257703/257706 co-relation queries the response was YES. [2024-06-20 16:01:45,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30697 conditions, 3466 events. 2162/3466 cut-off events. For 257703/257706 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19493 event pairs, 500 based on Foata normal form. 14/3476 useless extension candidates. Maximal degree in co-relation 30600. Up to 3135 conditions per place. [2024-06-20 16:01:45,647 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 27 changer transitions 0/312 dead transitions. [2024-06-20 16:01:45,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 312 transitions, 4027 flow [2024-06-20 16:01:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:01:45,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:01:45,653 INFO L175 Difference]: Start difference. First operand has 205 places, 282 transitions, 3199 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:01:45,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 312 transitions, 4027 flow [2024-06-20 16:01:45,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 312 transitions, 3912 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:45,924 INFO L231 Difference]: Finished difference. Result has 208 places, 284 transitions, 3222 flow [2024-06-20 16:01:45,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3222, PETRI_PLACES=208, PETRI_TRANSITIONS=284} [2024-06-20 16:01:45,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-20 16:01:45,925 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 284 transitions, 3222 flow [2024-06-20 16:01:45,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:45,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:45,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:01:45,925 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:45,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1435470171, now seen corresponding path program 1 times [2024-06-20 16:01:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812965040] [2024-06-20 16:01:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812965040] [2024-06-20 16:01:47,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812965040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:47,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:47,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:47,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364970378] [2024-06-20 16:01:47,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:01:47,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 284 transitions, 3222 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:47,954 INFO L124 PetriNetUnfolderBase]: 2177/3491 cut-off events. [2024-06-20 16:01:47,954 INFO L125 PetriNetUnfolderBase]: For 254031/254034 co-relation queries the response was YES. [2024-06-20 16:01:47,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30966 conditions, 3491 events. 2177/3491 cut-off events. For 254031/254034 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19708 event pairs, 501 based on Foata normal form. 5/3492 useless extension candidates. Maximal degree in co-relation 30868. Up to 3186 conditions per place. [2024-06-20 16:01:47,994 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 273 selfloop transitions, 35 changer transitions 0/313 dead transitions. [2024-06-20 16:01:47,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 313 transitions, 4042 flow [2024-06-20 16:01:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:01:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:01:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:01:47,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:01:47,996 INFO L175 Difference]: Start difference. First operand has 208 places, 284 transitions, 3222 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:01:47,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 313 transitions, 4042 flow [2024-06-20 16:01:48,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 313 transitions, 3940 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:48,246 INFO L231 Difference]: Finished difference. Result has 211 places, 289 transitions, 3346 flow [2024-06-20 16:01:48,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3346, PETRI_PLACES=211, PETRI_TRANSITIONS=289} [2024-06-20 16:01:48,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 16:01:48,246 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 289 transitions, 3346 flow [2024-06-20 16:01:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:48,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:48,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:01:48,247 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:48,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -763279515, now seen corresponding path program 1 times [2024-06-20 16:01:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:48,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119657705] [2024-06-20 16:01:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:49,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:49,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119657705] [2024-06-20 16:01:49,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119657705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:49,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:49,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438260509] [2024-06-20 16:01:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:49,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:49,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:49,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:49,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 289 transitions, 3346 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:49,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:49,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:49,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:50,003 INFO L124 PetriNetUnfolderBase]: 2187/3504 cut-off events. [2024-06-20 16:01:50,003 INFO L125 PetriNetUnfolderBase]: For 261622/261625 co-relation queries the response was YES. [2024-06-20 16:01:50,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31612 conditions, 3504 events. 2187/3504 cut-off events. For 261622/261625 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19761 event pairs, 502 based on Foata normal form. 2/3501 useless extension candidates. Maximal degree in co-relation 31513. Up to 3148 conditions per place. [2024-06-20 16:01:50,043 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 38 changer transitions 0/315 dead transitions. [2024-06-20 16:01:50,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 315 transitions, 4110 flow [2024-06-20 16:01:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:01:50,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:01:50,045 INFO L175 Difference]: Start difference. First operand has 211 places, 289 transitions, 3346 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:01:50,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 315 transitions, 4110 flow [2024-06-20 16:01:50,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 315 transitions, 3918 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:50,326 INFO L231 Difference]: Finished difference. Result has 212 places, 293 transitions, 3331 flow [2024-06-20 16:01:50,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=212, PETRI_TRANSITIONS=293} [2024-06-20 16:01:50,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-20 16:01:50,326 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 293 transitions, 3331 flow [2024-06-20 16:01:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:50,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:50,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:01:50,327 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:50,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -763159359, now seen corresponding path program 1 times [2024-06-20 16:01:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521684156] [2024-06-20 16:01:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521684156] [2024-06-20 16:01:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521684156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:51,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269271472] [2024-06-20 16:01:51,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:51,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:51,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:51,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 293 transitions, 3331 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:51,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:51,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:51,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:52,048 INFO L124 PetriNetUnfolderBase]: 2207/3533 cut-off events. [2024-06-20 16:01:52,048 INFO L125 PetriNetUnfolderBase]: For 272372/272375 co-relation queries the response was YES. [2024-06-20 16:01:52,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 3533 events. 2207/3533 cut-off events. For 272372/272375 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19939 event pairs, 494 based on Foata normal form. 6/3535 useless extension candidates. Maximal degree in co-relation 31817. Up to 3231 conditions per place. [2024-06-20 16:01:52,092 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 29 changer transitions 0/318 dead transitions. [2024-06-20 16:01:52,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 318 transitions, 4111 flow [2024-06-20 16:01:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:01:52,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:01:52,093 INFO L175 Difference]: Start difference. First operand has 212 places, 293 transitions, 3331 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:01:52,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 318 transitions, 4111 flow [2024-06-20 16:01:52,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 318 transitions, 3957 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 16:01:52,391 INFO L231 Difference]: Finished difference. Result has 213 places, 298 transitions, 3353 flow [2024-06-20 16:01:52,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3177, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3353, PETRI_PLACES=213, PETRI_TRANSITIONS=298} [2024-06-20 16:01:52,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 16:01:52,392 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 298 transitions, 3353 flow [2024-06-20 16:01:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:52,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:52,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:52,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:01:52,392 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:52,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1148470435, now seen corresponding path program 2 times [2024-06-20 16:01:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427434950] [2024-06-20 16:01:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:53,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:53,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427434950] [2024-06-20 16:01:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427434950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:53,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183904035] [2024-06-20 16:01:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:53,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:53,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:53,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 298 transitions, 3353 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:53,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:53,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:54,208 INFO L124 PetriNetUnfolderBase]: 2219/3550 cut-off events. [2024-06-20 16:01:54,209 INFO L125 PetriNetUnfolderBase]: For 280289/280292 co-relation queries the response was YES. [2024-06-20 16:01:54,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 3550 events. 2219/3550 cut-off events. For 280289/280292 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20019 event pairs, 496 based on Foata normal form. 6/3552 useless extension candidates. Maximal degree in co-relation 32018. Up to 3197 conditions per place. [2024-06-20 16:01:54,247 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 275 selfloop transitions, 41 changer transitions 0/321 dead transitions. [2024-06-20 16:01:54,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 321 transitions, 4145 flow [2024-06-20 16:01:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:01:54,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:01:54,249 INFO L175 Difference]: Start difference. First operand has 213 places, 298 transitions, 3353 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:01:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 321 transitions, 4145 flow [2024-06-20 16:01:54,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 321 transitions, 4031 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:54,599 INFO L231 Difference]: Finished difference. Result has 215 places, 303 transitions, 3449 flow [2024-06-20 16:01:54,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3449, PETRI_PLACES=215, PETRI_TRANSITIONS=303} [2024-06-20 16:01:54,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 16:01:54,600 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 303 transitions, 3449 flow [2024-06-20 16:01:54,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:54,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:54,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:54,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:01:54,601 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:54,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1148233285, now seen corresponding path program 3 times [2024-06-20 16:01:54,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:54,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413285853] [2024-06-20 16:01:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413285853] [2024-06-20 16:01:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413285853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130120376] [2024-06-20 16:01:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:55,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:55,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 303 transitions, 3449 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:55,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:55,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:56,341 INFO L124 PetriNetUnfolderBase]: 2221/3553 cut-off events. [2024-06-20 16:01:56,341 INFO L125 PetriNetUnfolderBase]: For 284063/284066 co-relation queries the response was YES. [2024-06-20 16:01:56,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32210 conditions, 3553 events. 2221/3553 cut-off events. For 284063/284066 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20088 event pairs, 496 based on Foata normal form. 4/3553 useless extension candidates. Maximal degree in co-relation 32108. Up to 3128 conditions per place. [2024-06-20 16:01:56,382 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 255 selfloop transitions, 64 changer transitions 0/324 dead transitions. [2024-06-20 16:01:56,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 324 transitions, 4325 flow [2024-06-20 16:01:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:01:56,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:01:56,383 INFO L175 Difference]: Start difference. First operand has 215 places, 303 transitions, 3449 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:01:56,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 324 transitions, 4325 flow [2024-06-20 16:01:56,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 324 transitions, 4177 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 16:01:56,696 INFO L231 Difference]: Finished difference. Result has 217 places, 306 transitions, 3515 flow [2024-06-20 16:01:56,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3515, PETRI_PLACES=217, PETRI_TRANSITIONS=306} [2024-06-20 16:01:56,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-20 16:01:56,698 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 306 transitions, 3515 flow [2024-06-20 16:01:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:56,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:56,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:56,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:01:56,699 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:56,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1148593753, now seen corresponding path program 3 times [2024-06-20 16:01:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650444966] [2024-06-20 16:01:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:57,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:57,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650444966] [2024-06-20 16:01:57,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650444966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:57,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:57,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:01:57,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093257942] [2024-06-20 16:01:57,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:57,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:01:57,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:01:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:01:57,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:01:57,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 306 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:57,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:01:57,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:01:57,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:01:58,421 INFO L124 PetriNetUnfolderBase]: 2265/3623 cut-off events. [2024-06-20 16:01:58,422 INFO L125 PetriNetUnfolderBase]: For 311388/311391 co-relation queries the response was YES. [2024-06-20 16:01:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32959 conditions, 3623 events. 2265/3623 cut-off events. For 311388/311391 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20511 event pairs, 498 based on Foata normal form. 14/3633 useless extension candidates. Maximal degree in co-relation 32856. Up to 3232 conditions per place. [2024-06-20 16:01:58,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 39 changer transitions 0/331 dead transitions. [2024-06-20 16:01:58,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 331 transitions, 4379 flow [2024-06-20 16:01:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:01:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:01:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:01:58,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 16:01:58,466 INFO L175 Difference]: Start difference. First operand has 217 places, 306 transitions, 3515 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:01:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 331 transitions, 4379 flow [2024-06-20 16:01:58,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 331 transitions, 4232 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:01:58,901 INFO L231 Difference]: Finished difference. Result has 220 places, 308 transitions, 3536 flow [2024-06-20 16:01:58,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=220, PETRI_TRANSITIONS=308} [2024-06-20 16:01:58,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 16:01:58,902 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 308 transitions, 3536 flow [2024-06-20 16:01:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:01:58,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:58,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:01:58,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:01:58,902 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:01:58,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1148224791, now seen corresponding path program 2 times [2024-06-20 16:01:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:58,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741735699] [2024-06-20 16:01:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:58,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:01:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:01:59,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:01:59,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741735699] [2024-06-20 16:01:59,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741735699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:01:59,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:01:59,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:01:59,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223708462] [2024-06-20 16:01:59,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:01:59,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:01:59,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:01:59,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:01:59,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:00,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:00,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 308 transitions, 3536 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:00,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:01,074 INFO L124 PetriNetUnfolderBase]: 2383/3805 cut-off events. [2024-06-20 16:02:01,074 INFO L125 PetriNetUnfolderBase]: For 335171/335174 co-relation queries the response was YES. [2024-06-20 16:02:01,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35640 conditions, 3805 events. 2383/3805 cut-off events. For 335171/335174 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21736 event pairs, 503 based on Foata normal form. 8/3809 useless extension candidates. Maximal degree in co-relation 35536. Up to 3218 conditions per place. [2024-06-20 16:02:01,121 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 262 selfloop transitions, 75 changer transitions 0/342 dead transitions. [2024-06-20 16:02:01,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 342 transitions, 4881 flow [2024-06-20 16:02:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:02:01,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:02:01,123 INFO L175 Difference]: Start difference. First operand has 220 places, 308 transitions, 3536 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:02:01,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 342 transitions, 4881 flow [2024-06-20 16:02:01,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 342 transitions, 4751 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:01,551 INFO L231 Difference]: Finished difference. Result has 224 places, 318 transitions, 3884 flow [2024-06-20 16:02:01,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3884, PETRI_PLACES=224, PETRI_TRANSITIONS=318} [2024-06-20 16:02:01,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-20 16:02:01,552 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 318 transitions, 3884 flow [2024-06-20 16:02:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:01,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:01,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:01,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:02:01,553 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:01,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1148582841, now seen corresponding path program 3 times [2024-06-20 16:02:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989197279] [2024-06-20 16:02:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:02,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:02,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989197279] [2024-06-20 16:02:02,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989197279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:02,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:02,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550527608] [2024-06-20 16:02:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:02,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:02,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 318 transitions, 3884 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:02,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:02,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:02,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:03,661 INFO L124 PetriNetUnfolderBase]: 2413/3847 cut-off events. [2024-06-20 16:02:03,662 INFO L125 PetriNetUnfolderBase]: For 352644/352647 co-relation queries the response was YES. [2024-06-20 16:02:03,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37052 conditions, 3847 events. 2413/3847 cut-off events. For 352644/352647 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21924 event pairs, 513 based on Foata normal form. 8/3851 useless extension candidates. Maximal degree in co-relation 36946. Up to 3459 conditions per place. [2024-06-20 16:02:03,712 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 291 selfloop transitions, 47 changer transitions 0/343 dead transitions. [2024-06-20 16:02:03,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 343 transitions, 4792 flow [2024-06-20 16:02:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:02:03,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:02:03,714 INFO L175 Difference]: Start difference. First operand has 224 places, 318 transitions, 3884 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:02:03,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 343 transitions, 4792 flow [2024-06-20 16:02:04,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 343 transitions, 4511 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:04,111 INFO L231 Difference]: Finished difference. Result has 228 places, 323 transitions, 3881 flow [2024-06-20 16:02:04,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3881, PETRI_PLACES=228, PETRI_TRANSITIONS=323} [2024-06-20 16:02:04,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-20 16:02:04,112 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 323 transitions, 3881 flow [2024-06-20 16:02:04,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:04,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:04,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:04,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:02:04,112 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:04,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:04,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1148236881, now seen corresponding path program 4 times [2024-06-20 16:02:04,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061546117] [2024-06-20 16:02:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:05,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061546117] [2024-06-20 16:02:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061546117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:05,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:05,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899154587] [2024-06-20 16:02:05,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:05,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:05,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:05,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 323 transitions, 3881 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:05,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:05,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:05,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:06,183 INFO L124 PetriNetUnfolderBase]: 2443/3884 cut-off events. [2024-06-20 16:02:06,183 INFO L125 PetriNetUnfolderBase]: For 356655/356658 co-relation queries the response was YES. [2024-06-20 16:02:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37032 conditions, 3884 events. 2443/3884 cut-off events. For 356655/356658 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22074 event pairs, 506 based on Foata normal form. 8/3888 useless extension candidates. Maximal degree in co-relation 36924. Up to 3277 conditions per place. [2024-06-20 16:02:06,243 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 264 selfloop transitions, 83 changer transitions 0/352 dead transitions. [2024-06-20 16:02:06,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 352 transitions, 5002 flow [2024-06-20 16:02:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:02:06,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:02:06,245 INFO L175 Difference]: Start difference. First operand has 228 places, 323 transitions, 3881 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:02:06,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 352 transitions, 5002 flow [2024-06-20 16:02:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 352 transitions, 4824 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:06,658 INFO L231 Difference]: Finished difference. Result has 231 places, 328 transitions, 4021 flow [2024-06-20 16:02:06,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4021, PETRI_PLACES=231, PETRI_TRANSITIONS=328} [2024-06-20 16:02:06,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-20 16:02:06,659 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 328 transitions, 4021 flow [2024-06-20 16:02:06,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:06,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:06,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:02:06,660 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:06,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 743967619, now seen corresponding path program 2 times [2024-06-20 16:02:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:06,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266583755] [2024-06-20 16:02:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:06,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:07,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:07,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266583755] [2024-06-20 16:02:07,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266583755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:07,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:07,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:07,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672058032] [2024-06-20 16:02:07,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:07,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:07,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:07,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 328 transitions, 4021 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:07,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:07,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:07,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:08,517 INFO L124 PetriNetUnfolderBase]: 2448/3887 cut-off events. [2024-06-20 16:02:08,518 INFO L125 PetriNetUnfolderBase]: For 357243/357243 co-relation queries the response was YES. [2024-06-20 16:02:08,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37384 conditions, 3887 events. 2448/3887 cut-off events. For 357243/357243 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22056 event pairs, 535 based on Foata normal form. 1/3878 useless extension candidates. Maximal degree in co-relation 37275. Up to 3523 conditions per place. [2024-06-20 16:02:08,561 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 40 changer transitions 0/351 dead transitions. [2024-06-20 16:02:08,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 351 transitions, 4844 flow [2024-06-20 16:02:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:02:08,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:02:08,563 INFO L175 Difference]: Start difference. First operand has 231 places, 328 transitions, 4021 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:02:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 351 transitions, 4844 flow [2024-06-20 16:02:09,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 4623 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:09,027 INFO L231 Difference]: Finished difference. Result has 233 places, 331 transitions, 3971 flow [2024-06-20 16:02:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3800, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3971, PETRI_PLACES=233, PETRI_TRANSITIONS=331} [2024-06-20 16:02:09,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-20 16:02:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 331 transitions, 3971 flow [2024-06-20 16:02:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:09,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:02:09,028 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:09,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1956386661, now seen corresponding path program 3 times [2024-06-20 16:02:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264526520] [2024-06-20 16:02:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:09,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:09,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264526520] [2024-06-20 16:02:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264526520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370698342] [2024-06-20 16:02:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:09,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:09,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:09,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 331 transitions, 3971 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:09,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:09,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:09,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:10,821 INFO L124 PetriNetUnfolderBase]: 2445/3883 cut-off events. [2024-06-20 16:02:10,821 INFO L125 PetriNetUnfolderBase]: For 361643/361643 co-relation queries the response was YES. [2024-06-20 16:02:10,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36933 conditions, 3883 events. 2445/3883 cut-off events. For 361643/361643 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22027 event pairs, 535 based on Foata normal form. 1/3874 useless extension candidates. Maximal degree in co-relation 36823. Up to 3519 conditions per place. [2024-06-20 16:02:10,864 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 309 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-20 16:02:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 353 transitions, 4771 flow [2024-06-20 16:02:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:02:10,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:02:10,865 INFO L175 Difference]: Start difference. First operand has 233 places, 331 transitions, 3971 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:02:10,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 353 transitions, 4771 flow [2024-06-20 16:02:11,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 353 transitions, 4631 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:11,352 INFO L231 Difference]: Finished difference. Result has 235 places, 333 transitions, 3971 flow [2024-06-20 16:02:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3971, PETRI_PLACES=235, PETRI_TRANSITIONS=333} [2024-06-20 16:02:11,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 16:02:11,352 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 333 transitions, 3971 flow [2024-06-20 16:02:11,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:11,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:11,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:11,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:02:11,353 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:11,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2099251645, now seen corresponding path program 4 times [2024-06-20 16:02:11,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:11,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936799661] [2024-06-20 16:02:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:11,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:12,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:12,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936799661] [2024-06-20 16:02:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936799661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:12,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:12,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555824728] [2024-06-20 16:02:12,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:12,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:12,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:12,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 333 transitions, 3971 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:12,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:12,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:12,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:13,395 INFO L124 PetriNetUnfolderBase]: 2442/3879 cut-off events. [2024-06-20 16:02:13,395 INFO L125 PetriNetUnfolderBase]: For 368527/368527 co-relation queries the response was YES. [2024-06-20 16:02:13,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36901 conditions, 3879 events. 2442/3879 cut-off events. For 368527/368527 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22047 event pairs, 534 based on Foata normal form. 1/3870 useless extension candidates. Maximal degree in co-relation 36790. Up to 3500 conditions per place. [2024-06-20 16:02:13,440 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 52 changer transitions 0/353 dead transitions. [2024-06-20 16:02:13,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 353 transitions, 4817 flow [2024-06-20 16:02:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:02:13,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:02:13,441 INFO L175 Difference]: Start difference. First operand has 235 places, 333 transitions, 3971 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:02:13,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 353 transitions, 4817 flow [2024-06-20 16:02:13,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 353 transitions, 4652 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:13,881 INFO L231 Difference]: Finished difference. Result has 236 places, 336 transitions, 4028 flow [2024-06-20 16:02:13,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=236, PETRI_TRANSITIONS=336} [2024-06-20 16:02:13,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-20 16:02:13,882 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 336 transitions, 4028 flow [2024-06-20 16:02:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:13,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:13,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:13,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:02:13,883 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:13,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2082864095, now seen corresponding path program 4 times [2024-06-20 16:02:13,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:13,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045850964] [2024-06-20 16:02:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:13,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045850964] [2024-06-20 16:02:14,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045850964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:14,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:14,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683764199] [2024-06-20 16:02:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:14,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:14,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:14,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 336 transitions, 4028 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:14,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:14,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:14,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:15,616 INFO L124 PetriNetUnfolderBase]: 2424/3855 cut-off events. [2024-06-20 16:02:15,616 INFO L125 PetriNetUnfolderBase]: For 377384/377384 co-relation queries the response was YES. [2024-06-20 16:02:15,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36869 conditions, 3855 events. 2424/3855 cut-off events. For 377384/377384 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21892 event pairs, 526 based on Foata normal form. 2/3850 useless extension candidates. Maximal degree in co-relation 36758. Up to 3553 conditions per place. [2024-06-20 16:02:15,657 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 322 selfloop transitions, 27 changer transitions 0/354 dead transitions. [2024-06-20 16:02:15,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 354 transitions, 4774 flow [2024-06-20 16:02:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:02:15,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:02:15,659 INFO L175 Difference]: Start difference. First operand has 236 places, 336 transitions, 4028 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:02:15,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 354 transitions, 4774 flow [2024-06-20 16:02:16,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 354 transitions, 4536 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:16,157 INFO L231 Difference]: Finished difference. Result has 238 places, 336 transitions, 3851 flow [2024-06-20 16:02:16,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3851, PETRI_PLACES=238, PETRI_TRANSITIONS=336} [2024-06-20 16:02:16,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-20 16:02:16,158 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 336 transitions, 3851 flow [2024-06-20 16:02:16,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:16,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:16,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:16,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:02:16,159 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:16,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1983781729, now seen corresponding path program 5 times [2024-06-20 16:02:16,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:16,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504768044] [2024-06-20 16:02:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:16,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:17,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:17,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504768044] [2024-06-20 16:02:17,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504768044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:17,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:17,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142265391] [2024-06-20 16:02:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:17,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:17,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 336 transitions, 3851 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:17,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:17,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:17,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:17,988 INFO L124 PetriNetUnfolderBase]: 2450/3889 cut-off events. [2024-06-20 16:02:17,988 INFO L125 PetriNetUnfolderBase]: For 391578/391578 co-relation queries the response was YES. [2024-06-20 16:02:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 3889 events. 2450/3889 cut-off events. For 391578/391578 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22034 event pairs, 520 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 37214. Up to 3531 conditions per place. [2024-06-20 16:02:18,032 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 52 changer transitions 0/361 dead transitions. [2024-06-20 16:02:18,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 361 transitions, 4935 flow [2024-06-20 16:02:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:02:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:02:18,034 INFO L175 Difference]: Start difference. First operand has 238 places, 336 transitions, 3851 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:02:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 361 transitions, 4935 flow [2024-06-20 16:02:18,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 361 transitions, 4780 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 16:02:18,437 INFO L231 Difference]: Finished difference. Result has 239 places, 345 transitions, 4042 flow [2024-06-20 16:02:18,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4042, PETRI_PLACES=239, PETRI_TRANSITIONS=345} [2024-06-20 16:02:18,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 16:02:18,437 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 345 transitions, 4042 flow [2024-06-20 16:02:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:18,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:18,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:02:18,438 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:18,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -587343235, now seen corresponding path program 6 times [2024-06-20 16:02:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109696872] [2024-06-20 16:02:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:19,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109696872] [2024-06-20 16:02:19,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109696872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:19,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:19,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053704862] [2024-06-20 16:02:19,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:19,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:19,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:19,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 345 transitions, 4042 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:19,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:19,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:19,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:20,324 INFO L124 PetriNetUnfolderBase]: 2444/3881 cut-off events. [2024-06-20 16:02:20,324 INFO L125 PetriNetUnfolderBase]: For 397039/397039 co-relation queries the response was YES. [2024-06-20 16:02:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37352 conditions, 3881 events. 2444/3881 cut-off events. For 397039/397039 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21974 event pairs, 518 based on Foata normal form. 2/3876 useless extension candidates. Maximal degree in co-relation 37238. Up to 3555 conditions per place. [2024-06-20 16:02:20,370 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 320 selfloop transitions, 36 changer transitions 0/361 dead transitions. [2024-06-20 16:02:20,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 361 transitions, 4798 flow [2024-06-20 16:02:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:02:20,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:02:20,371 INFO L175 Difference]: Start difference. First operand has 239 places, 345 transitions, 4042 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:02:20,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 361 transitions, 4798 flow [2024-06-20 16:02:20,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 361 transitions, 4588 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:20,808 INFO L231 Difference]: Finished difference. Result has 242 places, 345 transitions, 3911 flow [2024-06-20 16:02:20,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3911, PETRI_PLACES=242, PETRI_TRANSITIONS=345} [2024-06-20 16:02:20,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-20 16:02:20,809 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 345 transitions, 3911 flow [2024-06-20 16:02:20,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:20,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:20,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:02:20,809 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:20,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash 735480827, now seen corresponding path program 7 times [2024-06-20 16:02:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973792077] [2024-06-20 16:02:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:21,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:21,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973792077] [2024-06-20 16:02:21,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973792077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:21,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433563934] [2024-06-20 16:02:21,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:21,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:21,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:22,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:22,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 345 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:22,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:22,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:22,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:22,810 INFO L124 PetriNetUnfolderBase]: 2460/3909 cut-off events. [2024-06-20 16:02:22,810 INFO L125 PetriNetUnfolderBase]: For 409341/409344 co-relation queries the response was YES. [2024-06-20 16:02:22,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37607 conditions, 3909 events. 2460/3909 cut-off events. For 409341/409344 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22191 event pairs, 540 based on Foata normal form. 4/3905 useless extension candidates. Maximal degree in co-relation 37492. Up to 3443 conditions per place. [2024-06-20 16:02:22,855 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 289 selfloop transitions, 72 changer transitions 0/366 dead transitions. [2024-06-20 16:02:22,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 366 transitions, 4986 flow [2024-06-20 16:02:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:02:22,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:02:22,856 INFO L175 Difference]: Start difference. First operand has 242 places, 345 transitions, 3911 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:02:22,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 366 transitions, 4986 flow [2024-06-20 16:02:23,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 366 transitions, 4915 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:23,284 INFO L231 Difference]: Finished difference. Result has 245 places, 353 transitions, 4206 flow [2024-06-20 16:02:23,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4206, PETRI_PLACES=245, PETRI_TRANSITIONS=353} [2024-06-20 16:02:23,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-20 16:02:23,284 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 353 transitions, 4206 flow [2024-06-20 16:02:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:23,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:23,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:23,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:02:23,285 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:23,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash -938020843, now seen corresponding path program 8 times [2024-06-20 16:02:23,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:23,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929823818] [2024-06-20 16:02:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:24,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:24,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929823818] [2024-06-20 16:02:24,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929823818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:24,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:24,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271784464] [2024-06-20 16:02:24,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:24,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:24,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:24,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:24,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 353 transitions, 4206 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:24,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:24,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:24,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:25,164 INFO L124 PetriNetUnfolderBase]: 2470/3927 cut-off events. [2024-06-20 16:02:25,164 INFO L125 PetriNetUnfolderBase]: For 419822/419825 co-relation queries the response was YES. [2024-06-20 16:02:25,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38235 conditions, 3927 events. 2470/3927 cut-off events. For 419822/419825 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22399 event pairs, 538 based on Foata normal form. 4/3923 useless extension candidates. Maximal degree in co-relation 38118. Up to 3495 conditions per place. [2024-06-20 16:02:25,212 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 306 selfloop transitions, 59 changer transitions 0/370 dead transitions. [2024-06-20 16:02:25,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 370 transitions, 5088 flow [2024-06-20 16:02:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:02:25,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:02:25,213 INFO L175 Difference]: Start difference. First operand has 245 places, 353 transitions, 4206 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:02:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 370 transitions, 5088 flow [2024-06-20 16:02:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 370 transitions, 4869 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:25,799 INFO L231 Difference]: Finished difference. Result has 248 places, 357 transitions, 4236 flow [2024-06-20 16:02:25,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4003, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=248, PETRI_TRANSITIONS=357} [2024-06-20 16:02:25,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 16:02:25,808 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 357 transitions, 4236 flow [2024-06-20 16:02:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:25,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:25,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:25,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:02:25,809 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:25,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash 963578207, now seen corresponding path program 9 times [2024-06-20 16:02:25,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:25,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314583707] [2024-06-20 16:02:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314583707] [2024-06-20 16:02:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314583707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:27,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:27,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111753701] [2024-06-20 16:02:27,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:27,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:27,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:27,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 357 transitions, 4236 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:27,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:27,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:27,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:28,145 INFO L124 PetriNetUnfolderBase]: 2472/3928 cut-off events. [2024-06-20 16:02:28,146 INFO L125 PetriNetUnfolderBase]: For 426799/426802 co-relation queries the response was YES. [2024-06-20 16:02:28,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38173 conditions, 3928 events. 2472/3928 cut-off events. For 426799/426802 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22390 event pairs, 540 based on Foata normal form. 4/3924 useless extension candidates. Maximal degree in co-relation 38055. Up to 3291 conditions per place. [2024-06-20 16:02:28,193 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 242 selfloop transitions, 126 changer transitions 0/373 dead transitions. [2024-06-20 16:02:28,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 373 transitions, 5360 flow [2024-06-20 16:02:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:02:28,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:02:28,195 INFO L175 Difference]: Start difference. First operand has 248 places, 357 transitions, 4236 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:02:28,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 373 transitions, 5360 flow [2024-06-20 16:02:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 373 transitions, 5185 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:28,819 INFO L231 Difference]: Finished difference. Result has 250 places, 360 transitions, 4395 flow [2024-06-20 16:02:28,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4395, PETRI_PLACES=250, PETRI_TRANSITIONS=360} [2024-06-20 16:02:28,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-20 16:02:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 360 transitions, 4395 flow [2024-06-20 16:02:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:28,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:28,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:02:28,821 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:28,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash 963785597, now seen corresponding path program 10 times [2024-06-20 16:02:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935233221] [2024-06-20 16:02:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:30,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935233221] [2024-06-20 16:02:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935233221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:30,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:30,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154318758] [2024-06-20 16:02:30,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:30,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:30,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:30,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 360 transitions, 4395 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:30,847 INFO L124 PetriNetUnfolderBase]: 2467/3916 cut-off events. [2024-06-20 16:02:30,847 INFO L125 PetriNetUnfolderBase]: For 431783/431786 co-relation queries the response was YES. [2024-06-20 16:02:30,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38369 conditions, 3916 events. 2467/3916 cut-off events. For 431783/431786 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22268 event pairs, 540 based on Foata normal form. 3/3911 useless extension candidates. Maximal degree in co-relation 38250. Up to 3286 conditions per place. [2024-06-20 16:02:30,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 234 selfloop transitions, 134 changer transitions 0/373 dead transitions. [2024-06-20 16:02:30,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 373 transitions, 5451 flow [2024-06-20 16:02:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:02:30,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:02:30,896 INFO L175 Difference]: Start difference. First operand has 250 places, 360 transitions, 4395 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:02:30,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 373 transitions, 5451 flow [2024-06-20 16:02:31,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 373 transitions, 5127 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:31,553 INFO L231 Difference]: Finished difference. Result has 253 places, 360 transitions, 4345 flow [2024-06-20 16:02:31,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4345, PETRI_PLACES=253, PETRI_TRANSITIONS=360} [2024-06-20 16:02:31,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 16:02:31,554 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 360 transitions, 4345 flow [2024-06-20 16:02:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:31,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:31,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:02:31,554 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:31,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash 558337217, now seen corresponding path program 11 times [2024-06-20 16:02:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:31,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087275636] [2024-06-20 16:02:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:32,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:32,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087275636] [2024-06-20 16:02:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087275636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:32,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:32,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096607491] [2024-06-20 16:02:32,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:32,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:32,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:32,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:32,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 360 transitions, 4345 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:32,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:32,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:32,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:33,461 INFO L124 PetriNetUnfolderBase]: 2453/3898 cut-off events. [2024-06-20 16:02:33,462 INFO L125 PetriNetUnfolderBase]: For 438499/438502 co-relation queries the response was YES. [2024-06-20 16:02:33,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37929 conditions, 3898 events. 2453/3898 cut-off events. For 438499/438502 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22198 event pairs, 534 based on Foata normal form. 6/3896 useless extension candidates. Maximal degree in co-relation 37809. Up to 3466 conditions per place. [2024-06-20 16:02:33,511 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 312 selfloop transitions, 56 changer transitions 0/373 dead transitions. [2024-06-20 16:02:33,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 373 transitions, 5117 flow [2024-06-20 16:02:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:02:33,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:02:33,513 INFO L175 Difference]: Start difference. First operand has 253 places, 360 transitions, 4345 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:02:33,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 373 transitions, 5117 flow [2024-06-20 16:02:34,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 373 transitions, 4655 flow, removed 59 selfloop flow, removed 10 redundant places. [2024-06-20 16:02:34,171 INFO L231 Difference]: Finished difference. Result has 251 places, 360 transitions, 4003 flow [2024-06-20 16:02:34,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4003, PETRI_PLACES=251, PETRI_TRANSITIONS=360} [2024-06-20 16:02:34,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-20 16:02:34,172 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 360 transitions, 4003 flow [2024-06-20 16:02:34,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:34,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:34,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:02:34,173 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:34,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash 558574367, now seen corresponding path program 12 times [2024-06-20 16:02:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:34,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321042380] [2024-06-20 16:02:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:35,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321042380] [2024-06-20 16:02:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321042380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:35,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632162784] [2024-06-20 16:02:35,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:35,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:35,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:35,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:35,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:35,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 360 transitions, 4003 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:35,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:35,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:35,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:36,042 INFO L124 PetriNetUnfolderBase]: 2445/3888 cut-off events. [2024-06-20 16:02:36,042 INFO L125 PetriNetUnfolderBase]: For 436259/436262 co-relation queries the response was YES. [2024-06-20 16:02:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37174 conditions, 3888 events. 2445/3888 cut-off events. For 436259/436262 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22134 event pairs, 534 based on Foata normal form. 4/3884 useless extension candidates. Maximal degree in co-relation 37056. Up to 3404 conditions per place. [2024-06-20 16:02:36,090 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 293 selfloop transitions, 74 changer transitions 0/372 dead transitions. [2024-06-20 16:02:36,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 372 transitions, 4769 flow [2024-06-20 16:02:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:02:36,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:02:36,092 INFO L175 Difference]: Start difference. First operand has 251 places, 360 transitions, 4003 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:02:36,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 372 transitions, 4769 flow [2024-06-20 16:02:36,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 372 transitions, 4589 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:36,824 INFO L231 Difference]: Finished difference. Result has 253 places, 360 transitions, 3980 flow [2024-06-20 16:02:36,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3980, PETRI_PLACES=253, PETRI_TRANSITIONS=360} [2024-06-20 16:02:36,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-20 16:02:36,825 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 360 transitions, 3980 flow [2024-06-20 16:02:36,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:36,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:36,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:36,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:02:36,825 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:36,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash 108295055, now seen corresponding path program 4 times [2024-06-20 16:02:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:36,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501499963] [2024-06-20 16:02:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:36,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:37,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501499963] [2024-06-20 16:02:37,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501499963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:37,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:37,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:37,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127726681] [2024-06-20 16:02:37,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:37,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:37,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 360 transitions, 3980 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:37,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:37,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:37,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:38,518 INFO L124 PetriNetUnfolderBase]: 2476/3933 cut-off events. [2024-06-20 16:02:38,519 INFO L125 PetriNetUnfolderBase]: For 470588/470591 co-relation queries the response was YES. [2024-06-20 16:02:38,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37555 conditions, 3933 events. 2476/3933 cut-off events. For 470588/470591 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22387 event pairs, 537 based on Foata normal form. 14/3939 useless extension candidates. Maximal degree in co-relation 37436. Up to 3468 conditions per place. [2024-06-20 16:02:38,565 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 55 changer transitions 0/380 dead transitions. [2024-06-20 16:02:38,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 380 transitions, 4948 flow [2024-06-20 16:02:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:02:38,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:02:38,567 INFO L175 Difference]: Start difference. First operand has 253 places, 360 transitions, 3980 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:02:38,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 380 transitions, 4948 flow [2024-06-20 16:02:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 380 transitions, 4778 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:39,217 INFO L231 Difference]: Finished difference. Result has 254 places, 362 transitions, 4022 flow [2024-06-20 16:02:39,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4022, PETRI_PLACES=254, PETRI_TRANSITIONS=362} [2024-06-20 16:02:39,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 16:02:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 362 transitions, 4022 flow [2024-06-20 16:02:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:39,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:02:39,218 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:39,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 108305967, now seen corresponding path program 5 times [2024-06-20 16:02:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805273626] [2024-06-20 16:02:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805273626] [2024-06-20 16:02:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805273626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:40,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375055667] [2024-06-20 16:02:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:40,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:40,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 362 transitions, 4022 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:41,367 INFO L124 PetriNetUnfolderBase]: 2491/3962 cut-off events. [2024-06-20 16:02:41,367 INFO L125 PetriNetUnfolderBase]: For 458583/458586 co-relation queries the response was YES. [2024-06-20 16:02:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38023 conditions, 3962 events. 2491/3962 cut-off events. For 458583/458586 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22657 event pairs, 538 based on Foata normal form. 5/3959 useless extension candidates. Maximal degree in co-relation 37903. Up to 3519 conditions per place. [2024-06-20 16:02:41,417 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 313 selfloop transitions, 63 changer transitions 0/381 dead transitions. [2024-06-20 16:02:41,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 381 transitions, 4978 flow [2024-06-20 16:02:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:02:41,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:02:41,418 INFO L175 Difference]: Start difference. First operand has 254 places, 362 transitions, 4022 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:02:41,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 381 transitions, 4978 flow [2024-06-20 16:02:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 381 transitions, 4806 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:42,072 INFO L231 Difference]: Finished difference. Result has 257 places, 367 transitions, 4160 flow [2024-06-20 16:02:42,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4160, PETRI_PLACES=257, PETRI_TRANSITIONS=367} [2024-06-20 16:02:42,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-20 16:02:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 367 transitions, 4160 flow [2024-06-20 16:02:42,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:42,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:42,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:42,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:02:42,073 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:42,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:42,073 INFO L85 PathProgramCache]: Analyzing trace with hash 522446561, now seen corresponding path program 1 times [2024-06-20 16:02:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:42,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65182852] [2024-06-20 16:02:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:43,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:43,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65182852] [2024-06-20 16:02:43,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65182852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:43,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:43,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:43,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259157720] [2024-06-20 16:02:43,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:43,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:43,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:43,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 367 transitions, 4160 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:43,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:43,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:43,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:44,484 INFO L124 PetriNetUnfolderBase]: 2504/3978 cut-off events. [2024-06-20 16:02:44,484 INFO L125 PetriNetUnfolderBase]: For 470077/470077 co-relation queries the response was YES. [2024-06-20 16:02:44,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38915 conditions, 3978 events. 2504/3978 cut-off events. For 470077/470077 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22651 event pairs, 512 based on Foata normal form. 1/3976 useless extension candidates. Maximal degree in co-relation 38794. Up to 3741 conditions per place. [2024-06-20 16:02:44,618 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 354 selfloop transitions, 27 changer transitions 0/386 dead transitions. [2024-06-20 16:02:44,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 386 transitions, 5366 flow [2024-06-20 16:02:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:02:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:02:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:02:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-20 16:02:44,619 INFO L175 Difference]: Start difference. First operand has 257 places, 367 transitions, 4160 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:02:44,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 386 transitions, 5366 flow [2024-06-20 16:02:45,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 386 transitions, 5090 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:45,265 INFO L231 Difference]: Finished difference. Result has 260 places, 373 transitions, 4210 flow [2024-06-20 16:02:45,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4210, PETRI_PLACES=260, PETRI_TRANSITIONS=373} [2024-06-20 16:02:45,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-20 16:02:45,266 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 373 transitions, 4210 flow [2024-06-20 16:02:45,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:45,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:45,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:02:45,267 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:45,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash 108651927, now seen corresponding path program 6 times [2024-06-20 16:02:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479947410] [2024-06-20 16:02:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:46,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479947410] [2024-06-20 16:02:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479947410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877624615] [2024-06-20 16:02:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 373 transitions, 4210 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:47,403 INFO L124 PetriNetUnfolderBase]: 2654/4187 cut-off events. [2024-06-20 16:02:47,403 INFO L125 PetriNetUnfolderBase]: For 551358/551361 co-relation queries the response was YES. [2024-06-20 16:02:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42789 conditions, 4187 events. 2654/4187 cut-off events. For 551358/551361 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23838 event pairs, 544 based on Foata normal form. 8/4187 useless extension candidates. Maximal degree in co-relation 42667. Up to 3554 conditions per place. [2024-06-20 16:02:47,456 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 312 selfloop transitions, 91 changer transitions 0/408 dead transitions. [2024-06-20 16:02:47,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 408 transitions, 6013 flow [2024-06-20 16:02:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:02:47,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:02:47,458 INFO L175 Difference]: Start difference. First operand has 260 places, 373 transitions, 4210 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:02:47,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 408 transitions, 6013 flow [2024-06-20 16:02:48,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 408 transitions, 5844 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:48,220 INFO L231 Difference]: Finished difference. Result has 265 places, 388 transitions, 4821 flow [2024-06-20 16:02:48,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4821, PETRI_PLACES=265, PETRI_TRANSITIONS=388} [2024-06-20 16:02:48,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 16:02:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 388 transitions, 4821 flow [2024-06-20 16:02:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:48,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:48,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:02:48,221 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:48,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 508149237, now seen corresponding path program 7 times [2024-06-20 16:02:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486642301] [2024-06-20 16:02:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:49,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:49,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486642301] [2024-06-20 16:02:49,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486642301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:49,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923502177] [2024-06-20 16:02:49,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:49,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:49,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:49,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:49,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:49,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 388 transitions, 4821 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:49,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:49,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:50,409 INFO L124 PetriNetUnfolderBase]: 2732/4313 cut-off events. [2024-06-20 16:02:50,410 INFO L125 PetriNetUnfolderBase]: For 600710/600713 co-relation queries the response was YES. [2024-06-20 16:02:50,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46073 conditions, 4313 events. 2732/4313 cut-off events. For 600710/600713 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24742 event pairs, 552 based on Foata normal form. 8/4313 useless extension candidates. Maximal degree in co-relation 45947. Up to 3162 conditions per place. [2024-06-20 16:02:50,467 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 238 selfloop transitions, 184 changer transitions 0/427 dead transitions. [2024-06-20 16:02:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 427 transitions, 7029 flow [2024-06-20 16:02:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:02:50,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:02:50,468 INFO L175 Difference]: Start difference. First operand has 265 places, 388 transitions, 4821 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:02:50,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 427 transitions, 7029 flow [2024-06-20 16:02:51,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 427 transitions, 6729 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:51,309 INFO L231 Difference]: Finished difference. Result has 273 places, 406 transitions, 5728 flow [2024-06-20 16:02:51,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5728, PETRI_PLACES=273, PETRI_TRANSITIONS=406} [2024-06-20 16:02:51,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-20 16:02:51,309 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 406 transitions, 5728 flow [2024-06-20 16:02:51,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:51,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:02:51,310 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:51,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash 958483791, now seen corresponding path program 8 times [2024-06-20 16:02:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:51,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256660711] [2024-06-20 16:02:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:52,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256660711] [2024-06-20 16:02:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256660711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:52,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:52,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:52,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730982494] [2024-06-20 16:02:52,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:52,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:52,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 406 transitions, 5728 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:52,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:52,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:52,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:53,587 INFO L124 PetriNetUnfolderBase]: 2820/4450 cut-off events. [2024-06-20 16:02:53,587 INFO L125 PetriNetUnfolderBase]: For 634050/634053 co-relation queries the response was YES. [2024-06-20 16:02:53,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49828 conditions, 4450 events. 2820/4450 cut-off events. For 634050/634053 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25640 event pairs, 539 based on Foata normal form. 8/4454 useless extension candidates. Maximal degree in co-relation 49697. Up to 4021 conditions per place. [2024-06-20 16:02:53,655 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 66 changer transitions 0/432 dead transitions. [2024-06-20 16:02:53,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 432 transitions, 7360 flow [2024-06-20 16:02:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:02:53,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:02:53,657 INFO L175 Difference]: Start difference. First operand has 273 places, 406 transitions, 5728 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:02:53,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 432 transitions, 7360 flow [2024-06-20 16:02:54,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 432 transitions, 6908 flow, removed 200 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:54,533 INFO L231 Difference]: Finished difference. Result has 280 places, 416 transitions, 5850 flow [2024-06-20 16:02:54,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5850, PETRI_PLACES=280, PETRI_TRANSITIONS=416} [2024-06-20 16:02:54,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 16:02:54,534 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 416 transitions, 5850 flow [2024-06-20 16:02:54,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:54,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:54,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:54,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:02:54,534 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:54,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash 521971331, now seen corresponding path program 2 times [2024-06-20 16:02:54,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921786891] [2024-06-20 16:02:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:54,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:56,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:56,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921786891] [2024-06-20 16:02:56,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921786891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:56,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453356205] [2024-06-20 16:02:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:56,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:56,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:57,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:02:57,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 416 transitions, 5850 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:57,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:57,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:02:57,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:58,345 INFO L124 PetriNetUnfolderBase]: 2815/4449 cut-off events. [2024-06-20 16:02:58,346 INFO L125 PetriNetUnfolderBase]: For 610106/610106 co-relation queries the response was YES. [2024-06-20 16:02:58,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47874 conditions, 4449 events. 2815/4449 cut-off events. For 610106/610106 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25655 event pairs, 546 based on Foata normal form. 1/4447 useless extension candidates. Maximal degree in co-relation 47740. Up to 4179 conditions per place. [2024-06-20 16:02:58,407 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 401 selfloop transitions, 21 changer transitions 0/427 dead transitions. [2024-06-20 16:02:58,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 427 transitions, 6720 flow [2024-06-20 16:02:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:02:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:02:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:02:58,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 16:02:58,410 INFO L175 Difference]: Start difference. First operand has 280 places, 416 transitions, 5850 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:02:58,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 427 transitions, 6720 flow [2024-06-20 16:02:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 427 transitions, 5957 flow, removed 129 selfloop flow, removed 10 redundant places. [2024-06-20 16:02:59,407 INFO L231 Difference]: Finished difference. Result has 279 places, 416 transitions, 5135 flow [2024-06-20 16:02:59,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5135, PETRI_PLACES=279, PETRI_TRANSITIONS=416} [2024-06-20 16:02:59,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 16:02:59,408 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 416 transitions, 5135 flow [2024-06-20 16:02:59,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:59,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:59,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:02:59,409 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:02:59,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash 53546931, now seen corresponding path program 3 times [2024-06-20 16:02:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:59,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696659794] [2024-06-20 16:02:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696659794] [2024-06-20 16:03:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696659794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:00,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670502179] [2024-06-20 16:03:00,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:00,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:00,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:00,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 416 transitions, 5135 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:00,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:00,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:00,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:01,536 INFO L124 PetriNetUnfolderBase]: 2812/4447 cut-off events. [2024-06-20 16:03:01,537 INFO L125 PetriNetUnfolderBase]: For 616712/616724 co-relation queries the response was YES. [2024-06-20 16:03:01,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46055 conditions, 4447 events. 2812/4447 cut-off events. For 616712/616724 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25657 event pairs, 551 based on Foata normal form. 9/4451 useless extension candidates. Maximal degree in co-relation 45924. Up to 4121 conditions per place. [2024-06-20 16:03:01,600 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 52 changer transitions 0/430 dead transitions. [2024-06-20 16:03:01,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 430 transitions, 6152 flow [2024-06-20 16:03:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:03:01,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:03:01,601 INFO L175 Difference]: Start difference. First operand has 279 places, 416 transitions, 5135 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:03:01,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 430 transitions, 6152 flow [2024-06-20 16:03:02,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 430 transitions, 6100 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:02,513 INFO L231 Difference]: Finished difference. Result has 279 places, 419 transitions, 5340 flow [2024-06-20 16:03:02,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5083, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5340, PETRI_PLACES=279, PETRI_TRANSITIONS=419} [2024-06-20 16:03:02,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 16:03:02,513 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 419 transitions, 5340 flow [2024-06-20 16:03:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:02,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:02,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:03:02,514 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash 558582861, now seen corresponding path program 9 times [2024-06-20 16:03:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463599774] [2024-06-20 16:03:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:03,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:03,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463599774] [2024-06-20 16:03:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463599774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940857960] [2024-06-20 16:03:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:03,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:03,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 419 transitions, 5340 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:03,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:03,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:03,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:04,706 INFO L124 PetriNetUnfolderBase]: 2802/4428 cut-off events. [2024-06-20 16:03:04,706 INFO L125 PetriNetUnfolderBase]: For 624847/624856 co-relation queries the response was YES. [2024-06-20 16:03:04,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45726 conditions, 4428 events. 2802/4428 cut-off events. For 624847/624856 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25501 event pairs, 560 based on Foata normal form. 9/4428 useless extension candidates. Maximal degree in co-relation 45594. Up to 3771 conditions per place. [2024-06-20 16:03:04,768 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 342 selfloop transitions, 90 changer transitions 0/437 dead transitions. [2024-06-20 16:03:04,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 437 transitions, 6525 flow [2024-06-20 16:03:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:03:04,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:03:04,769 INFO L175 Difference]: Start difference. First operand has 279 places, 419 transitions, 5340 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:03:04,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 437 transitions, 6525 flow [2024-06-20 16:03:05,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 437 transitions, 6195 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:05,807 INFO L231 Difference]: Finished difference. Result has 281 places, 419 transitions, 5202 flow [2024-06-20 16:03:05,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5202, PETRI_PLACES=281, PETRI_TRANSITIONS=419} [2024-06-20 16:03:05,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-20 16:03:05,808 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 419 transitions, 5202 flow [2024-06-20 16:03:05,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:05,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:05,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:05,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:03:05,809 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:05,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash 508161327, now seen corresponding path program 10 times [2024-06-20 16:03:05,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:05,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669826240] [2024-06-20 16:03:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:05,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:07,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669826240] [2024-06-20 16:03:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669826240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:07,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:07,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:07,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403361295] [2024-06-20 16:03:07,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:07,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:07,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:07,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 419 transitions, 5202 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:07,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:07,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:07,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:08,271 INFO L124 PetriNetUnfolderBase]: 2792/4428 cut-off events. [2024-06-20 16:03:08,272 INFO L125 PetriNetUnfolderBase]: For 609764/609773 co-relation queries the response was YES. [2024-06-20 16:03:08,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45055 conditions, 4428 events. 2792/4428 cut-off events. For 609764/609773 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25659 event pairs, 560 based on Foata normal form. 9/4428 useless extension candidates. Maximal degree in co-relation 44923. Up to 3223 conditions per place. [2024-06-20 16:03:08,328 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 245 selfloop transitions, 189 changer transitions 0/439 dead transitions. [2024-06-20 16:03:08,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 439 transitions, 6748 flow [2024-06-20 16:03:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:03:08,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:03:08,330 INFO L175 Difference]: Start difference. First operand has 281 places, 419 transitions, 5202 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:03:08,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 439 transitions, 6748 flow [2024-06-20 16:03:09,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 439 transitions, 6432 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:09,284 INFO L231 Difference]: Finished difference. Result has 282 places, 419 transitions, 5274 flow [2024-06-20 16:03:09,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5274, PETRI_PLACES=282, PETRI_TRANSITIONS=419} [2024-06-20 16:03:09,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 16:03:09,285 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 419 transitions, 5274 flow [2024-06-20 16:03:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:09,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:09,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:09,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:03:09,285 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:09,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash 752547427, now seen corresponding path program 1 times [2024-06-20 16:03:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:09,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661009186] [2024-06-20 16:03:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:09,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:10,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:10,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661009186] [2024-06-20 16:03:10,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661009186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:10,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:10,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:10,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199495892] [2024-06-20 16:03:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:10,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:10,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:10,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:03:10,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 419 transitions, 5274 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:10,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:10,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:03:10,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:11,497 INFO L124 PetriNetUnfolderBase]: 2716/4348 cut-off events. [2024-06-20 16:03:11,497 INFO L125 PetriNetUnfolderBase]: For 614681/614681 co-relation queries the response was YES. [2024-06-20 16:03:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45014 conditions, 4348 events. 2716/4348 cut-off events. For 614681/614681 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25472 event pairs, 480 based on Foata normal form. 2/4347 useless extension candidates. Maximal degree in co-relation 44882. Up to 3873 conditions per place. [2024-06-20 16:03:11,559 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 393 selfloop transitions, 17 changer transitions 0/442 dead transitions. [2024-06-20 16:03:11,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 442 transitions, 6212 flow [2024-06-20 16:03:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:03:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:03:11,561 INFO L175 Difference]: Start difference. First operand has 282 places, 419 transitions, 5274 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:03:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 442 transitions, 6212 flow [2024-06-20 16:03:12,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 442 transitions, 5753 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:12,497 INFO L231 Difference]: Finished difference. Result has 282 places, 421 transitions, 4924 flow [2024-06-20 16:03:12,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4924, PETRI_PLACES=282, PETRI_TRANSITIONS=421} [2024-06-20 16:03:12,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 16:03:12,498 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 421 transitions, 4924 flow [2024-06-20 16:03:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:12,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:12,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:12,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:03:12,499 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:12,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2099242717, now seen corresponding path program 2 times [2024-06-20 16:03:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990708100] [2024-06-20 16:03:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:13,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990708100] [2024-06-20 16:03:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990708100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578440661] [2024-06-20 16:03:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:13,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:13,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:13,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:13,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:03:13,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 421 transitions, 4924 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:13,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:13,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:03:13,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:14,587 INFO L124 PetriNetUnfolderBase]: 2722/4365 cut-off events. [2024-06-20 16:03:14,587 INFO L125 PetriNetUnfolderBase]: For 624725/624725 co-relation queries the response was YES. [2024-06-20 16:03:14,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44309 conditions, 4365 events. 2722/4365 cut-off events. For 624725/624725 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25729 event pairs, 513 based on Foata normal form. 2/4364 useless extension candidates. Maximal degree in co-relation 44178. Up to 3900 conditions per place. [2024-06-20 16:03:14,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 390 selfloop transitions, 18 changer transitions 0/440 dead transitions. [2024-06-20 16:03:14,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 440 transitions, 5852 flow [2024-06-20 16:03:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:03:14,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:03:14,648 INFO L175 Difference]: Start difference. First operand has 282 places, 421 transitions, 4924 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:03:14,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 440 transitions, 5852 flow [2024-06-20 16:03:15,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 440 transitions, 5759 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:15,524 INFO L231 Difference]: Finished difference. Result has 284 places, 423 transitions, 4946 flow [2024-06-20 16:03:15,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4946, PETRI_PLACES=284, PETRI_TRANSITIONS=423} [2024-06-20 16:03:15,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-20 16:03:15,525 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 423 transitions, 4946 flow [2024-06-20 16:03:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:15,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:15,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:03:15,526 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:15,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1983951547, now seen corresponding path program 3 times [2024-06-20 16:03:15,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:15,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703042005] [2024-06-20 16:03:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:16,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703042005] [2024-06-20 16:03:16,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703042005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:16,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:16,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:16,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843410328] [2024-06-20 16:03:16,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:16,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:16,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:16,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:03:16,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 423 transitions, 4946 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:16,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:16,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:03:16,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:17,764 INFO L124 PetriNetUnfolderBase]: 2730/4377 cut-off events. [2024-06-20 16:03:17,764 INFO L125 PetriNetUnfolderBase]: For 634136/634136 co-relation queries the response was YES. [2024-06-20 16:03:17,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44598 conditions, 4377 events. 2730/4377 cut-off events. For 634136/634136 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25725 event pairs, 511 based on Foata normal form. 2/4376 useless extension candidates. Maximal degree in co-relation 44466. Up to 3906 conditions per place. [2024-06-20 16:03:17,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 22 changer transitions 0/442 dead transitions. [2024-06-20 16:03:17,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 5905 flow [2024-06-20 16:03:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:03:17,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:03:17,829 INFO L175 Difference]: Start difference. First operand has 284 places, 423 transitions, 4946 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:03:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 5905 flow [2024-06-20 16:03:18,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 442 transitions, 5806 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:18,872 INFO L231 Difference]: Finished difference. Result has 286 places, 428 transitions, 5015 flow [2024-06-20 16:03:18,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5015, PETRI_PLACES=286, PETRI_TRANSITIONS=428} [2024-06-20 16:03:18,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 16:03:18,873 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 428 transitions, 5015 flow [2024-06-20 16:03:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:18,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:18,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:18,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:03:18,874 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:18,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 735714629, now seen corresponding path program 4 times [2024-06-20 16:03:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766501140] [2024-06-20 16:03:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:18,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:19,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766501140] [2024-06-20 16:03:19,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766501140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:19,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:19,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778673333] [2024-06-20 16:03:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:03:19,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 428 transitions, 5015 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:19,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:19,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:03:19,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:20,856 INFO L124 PetriNetUnfolderBase]: 2725/4369 cut-off events. [2024-06-20 16:03:20,856 INFO L125 PetriNetUnfolderBase]: For 638604/638607 co-relation queries the response was YES. [2024-06-20 16:03:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44503 conditions, 4369 events. 2725/4369 cut-off events. For 638604/638607 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25665 event pairs, 510 based on Foata normal form. 4/4369 useless extension candidates. Maximal degree in co-relation 44369. Up to 3902 conditions per place. [2024-06-20 16:03:20,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 24 changer transitions 0/444 dead transitions. [2024-06-20 16:03:20,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 444 transitions, 5974 flow [2024-06-20 16:03:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:03:20,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:03:20,918 INFO L175 Difference]: Start difference. First operand has 286 places, 428 transitions, 5015 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:03:20,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 444 transitions, 5974 flow [2024-06-20 16:03:21,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 444 transitions, 5875 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:21,939 INFO L231 Difference]: Finished difference. Result has 291 places, 433 transitions, 5088 flow [2024-06-20 16:03:21,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5088, PETRI_PLACES=291, PETRI_TRANSITIONS=433} [2024-06-20 16:03:21,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-20 16:03:21,940 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 433 transitions, 5088 flow [2024-06-20 16:03:21,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:21,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:21,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:03:21,940 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:21,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1138214493, now seen corresponding path program 1 times [2024-06-20 16:03:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:21,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333754392] [2024-06-20 16:03:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:23,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:23,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333754392] [2024-06-20 16:03:23,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333754392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:23,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:23,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525140513] [2024-06-20 16:03:23,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:23,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:23,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 433 transitions, 5088 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:23,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:23,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:23,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:24,471 INFO L124 PetriNetUnfolderBase]: 2821/4469 cut-off events. [2024-06-20 16:03:24,471 INFO L125 PetriNetUnfolderBase]: For 643258/643261 co-relation queries the response was YES. [2024-06-20 16:03:24,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45206 conditions, 4469 events. 2821/4469 cut-off events. For 643258/643261 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25825 event pairs, 530 based on Foata normal form. 3/4468 useless extension candidates. Maximal degree in co-relation 45070. Up to 4143 conditions per place. [2024-06-20 16:03:24,532 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 394 selfloop transitions, 51 changer transitions 0/450 dead transitions. [2024-06-20 16:03:24,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 6106 flow [2024-06-20 16:03:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:03:24,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:03:24,534 INFO L175 Difference]: Start difference. First operand has 291 places, 433 transitions, 5088 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:03:24,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 6106 flow [2024-06-20 16:03:25,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 450 transitions, 5985 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:25,591 INFO L231 Difference]: Finished difference. Result has 295 places, 439 transitions, 5183 flow [2024-06-20 16:03:25,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5183, PETRI_PLACES=295, PETRI_TRANSITIONS=439} [2024-06-20 16:03:25,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-20 16:03:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 439 transitions, 5183 flow [2024-06-20 16:03:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:03:25,593 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 972371357, now seen corresponding path program 2 times [2024-06-20 16:03:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553665079] [2024-06-20 16:03:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:26,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:26,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553665079] [2024-06-20 16:03:26,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553665079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:26,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:26,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810726675] [2024-06-20 16:03:26,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:26,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:26,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:26,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:26,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:26,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 439 transitions, 5183 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:26,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:26,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:26,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:27,949 INFO L124 PetriNetUnfolderBase]: 2818/4461 cut-off events. [2024-06-20 16:03:27,950 INFO L125 PetriNetUnfolderBase]: For 651023/651026 co-relation queries the response was YES. [2024-06-20 16:03:27,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45145 conditions, 4461 events. 2818/4461 cut-off events. For 651023/651026 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25732 event pairs, 533 based on Foata normal form. 3/4460 useless extension candidates. Maximal degree in co-relation 45008. Up to 4119 conditions per place. [2024-06-20 16:03:28,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 382 selfloop transitions, 62 changer transitions 0/449 dead transitions. [2024-06-20 16:03:28,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 449 transitions, 6095 flow [2024-06-20 16:03:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:03:28,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 16:03:28,021 INFO L175 Difference]: Start difference. First operand has 295 places, 439 transitions, 5183 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:03:28,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 449 transitions, 6095 flow [2024-06-20 16:03:29,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 449 transitions, 5905 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:29,112 INFO L231 Difference]: Finished difference. Result has 297 places, 439 transitions, 5126 flow [2024-06-20 16:03:29,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5126, PETRI_PLACES=297, PETRI_TRANSITIONS=439} [2024-06-20 16:03:29,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-20 16:03:29,113 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 439 transitions, 5126 flow [2024-06-20 16:03:29,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:29,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:29,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:29,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:03:29,114 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:29,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1560084789, now seen corresponding path program 1 times [2024-06-20 16:03:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:29,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210030675] [2024-06-20 16:03:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:30,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:30,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210030675] [2024-06-20 16:03:30,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210030675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:30,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:30,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159021598] [2024-06-20 16:03:30,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:30,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:30,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:30,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:30,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 439 transitions, 5126 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:30,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:30,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:30,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:31,293 INFO L124 PetriNetUnfolderBase]: 2854/4521 cut-off events. [2024-06-20 16:03:31,293 INFO L125 PetriNetUnfolderBase]: For 699708/699711 co-relation queries the response was YES. [2024-06-20 16:03:31,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45769 conditions, 4521 events. 2854/4521 cut-off events. For 699708/699711 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26194 event pairs, 399 based on Foata normal form. 12/4529 useless extension candidates. Maximal degree in co-relation 45631. Up to 4045 conditions per place. [2024-06-20 16:03:31,359 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 29 changer transitions 0/476 dead transitions. [2024-06-20 16:03:31,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 476 transitions, 6382 flow [2024-06-20 16:03:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:03:31,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 16:03:31,381 INFO L175 Difference]: Start difference. First operand has 297 places, 439 transitions, 5126 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:03:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 476 transitions, 6382 flow [2024-06-20 16:03:32,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 476 transitions, 6234 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:32,496 INFO L231 Difference]: Finished difference. Result has 300 places, 442 transitions, 5170 flow [2024-06-20 16:03:32,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4978, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5170, PETRI_PLACES=300, PETRI_TRANSITIONS=442} [2024-06-20 16:03:32,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-20 16:03:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 442 transitions, 5170 flow [2024-06-20 16:03:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:32,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:32,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:32,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:03:32,498 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:32,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1294387509, now seen corresponding path program 2 times [2024-06-20 16:03:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:32,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79767918] [2024-06-20 16:03:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:33,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79767918] [2024-06-20 16:03:33,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79767918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:33,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:33,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060316803] [2024-06-20 16:03:33,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:33,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:33,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 442 transitions, 5170 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:33,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:33,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:33,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:34,963 INFO L124 PetriNetUnfolderBase]: 2898/4583 cut-off events. [2024-06-20 16:03:34,964 INFO L125 PetriNetUnfolderBase]: For 726787/726790 co-relation queries the response was YES. [2024-06-20 16:03:35,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46782 conditions, 4583 events. 2898/4583 cut-off events. For 726787/726790 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26518 event pairs, 545 based on Foata normal form. 14/4593 useless extension candidates. Maximal degree in co-relation 46643. Up to 4132 conditions per place. [2024-06-20 16:03:35,029 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 443 selfloop transitions, 30 changer transitions 0/478 dead transitions. [2024-06-20 16:03:35,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 478 transitions, 6480 flow [2024-06-20 16:03:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:03:35,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 16:03:35,030 INFO L175 Difference]: Start difference. First operand has 300 places, 442 transitions, 5170 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:03:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 478 transitions, 6480 flow [2024-06-20 16:03:36,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 478 transitions, 6338 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:36,271 INFO L231 Difference]: Finished difference. Result has 302 places, 445 transitions, 5228 flow [2024-06-20 16:03:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5028, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5228, PETRI_PLACES=302, PETRI_TRANSITIONS=445} [2024-06-20 16:03:36,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 16:03:36,272 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 445 transitions, 5228 flow [2024-06-20 16:03:36,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:36,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:36,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:36,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:03:36,272 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:36,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1294061079, now seen corresponding path program 3 times [2024-06-20 16:03:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496977660] [2024-06-20 16:03:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:37,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496977660] [2024-06-20 16:03:37,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496977660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:37,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:37,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456706837] [2024-06-20 16:03:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:37,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:37,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:37,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:37,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 445 transitions, 5228 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:37,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:37,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:37,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:38,406 INFO L124 PetriNetUnfolderBase]: 2942/4655 cut-off events. [2024-06-20 16:03:38,407 INFO L125 PetriNetUnfolderBase]: For 748145/748148 co-relation queries the response was YES. [2024-06-20 16:03:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47632 conditions, 4655 events. 2942/4655 cut-off events. For 748145/748148 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27073 event pairs, 571 based on Foata normal form. 14/4665 useless extension candidates. Maximal degree in co-relation 47492. Up to 4255 conditions per place. [2024-06-20 16:03:38,477 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 438 selfloop transitions, 33 changer transitions 0/476 dead transitions. [2024-06-20 16:03:38,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 476 transitions, 6442 flow [2024-06-20 16:03:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:03:38,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:03:38,478 INFO L175 Difference]: Start difference. First operand has 302 places, 445 transitions, 5228 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:03:38,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 476 transitions, 6442 flow [2024-06-20 16:03:39,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 476 transitions, 6292 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:39,800 INFO L231 Difference]: Finished difference. Result has 304 places, 448 transitions, 5291 flow [2024-06-20 16:03:39,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5291, PETRI_PLACES=304, PETRI_TRANSITIONS=448} [2024-06-20 16:03:39,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-20 16:03:39,801 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 448 transitions, 5291 flow [2024-06-20 16:03:39,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:39,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:39,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:39,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:03:39,801 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:39,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1989300985, now seen corresponding path program 1 times [2024-06-20 16:03:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606457545] [2024-06-20 16:03:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:41,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606457545] [2024-06-20 16:03:41,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606457545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:41,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:41,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:41,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332167427] [2024-06-20 16:03:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:41,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:41,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:41,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 448 transitions, 5291 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:03:41,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:41,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:41,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:42,895 INFO L124 PetriNetUnfolderBase]: 2949/4665 cut-off events. [2024-06-20 16:03:42,895 INFO L125 PetriNetUnfolderBase]: For 720123/720126 co-relation queries the response was YES. [2024-06-20 16:03:42,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47746 conditions, 4665 events. 2949/4665 cut-off events. For 720123/720126 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27070 event pairs, 570 based on Foata normal form. 5/4666 useless extension candidates. Maximal degree in co-relation 47605. Up to 4291 conditions per place. [2024-06-20 16:03:42,961 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 433 selfloop transitions, 40 changer transitions 0/478 dead transitions. [2024-06-20 16:03:42,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 478 transitions, 6483 flow [2024-06-20 16:03:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-20 16:03:42,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-20 16:03:42,965 INFO L175 Difference]: Start difference. First operand has 304 places, 448 transitions, 5291 flow. Second operand 10 states and 184 transitions. [2024-06-20 16:03:42,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 478 transitions, 6483 flow [2024-06-20 16:03:44,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 478 transitions, 6322 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:44,261 INFO L231 Difference]: Finished difference. Result has 307 places, 453 transitions, 5402 flow [2024-06-20 16:03:44,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5130, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5402, PETRI_PLACES=307, PETRI_TRANSITIONS=453} [2024-06-20 16:03:44,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 16:03:44,262 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 453 transitions, 5402 flow [2024-06-20 16:03:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:03:44,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:44,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:03:44,262 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:44,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2102479341, now seen corresponding path program 1 times [2024-06-20 16:03:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959736055] [2024-06-20 16:03:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:45,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:45,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959736055] [2024-06-20 16:03:45,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959736055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:45,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:45,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:45,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053736059] [2024-06-20 16:03:45,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:45,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:45,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:45,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:45,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 453 transitions, 5402 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:45,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:45,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:45,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:46,265 INFO L124 PetriNetUnfolderBase]: 2965/4692 cut-off events. [2024-06-20 16:03:46,265 INFO L125 PetriNetUnfolderBase]: For 722193/722196 co-relation queries the response was YES. [2024-06-20 16:03:46,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47894 conditions, 4692 events. 2965/4692 cut-off events. For 722193/722196 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27293 event pairs, 574 based on Foata normal form. 1/4688 useless extension candidates. Maximal degree in co-relation 47752. Up to 4270 conditions per place. [2024-06-20 16:03:46,335 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 43 changer transitions 0/484 dead transitions. [2024-06-20 16:03:46,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 484 transitions, 6529 flow [2024-06-20 16:03:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:03:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:03:46,337 INFO L175 Difference]: Start difference. First operand has 307 places, 453 transitions, 5402 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:03:46,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 484 transitions, 6529 flow [2024-06-20 16:03:47,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 484 transitions, 6311 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:47,673 INFO L231 Difference]: Finished difference. Result has 307 places, 459 transitions, 5383 flow [2024-06-20 16:03:47,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5383, PETRI_PLACES=307, PETRI_TRANSITIONS=459} [2024-06-20 16:03:47,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-20 16:03:47,674 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 459 transitions, 5383 flow [2024-06-20 16:03:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:47,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:47,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:47,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:03:47,674 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:47,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1851990429, now seen corresponding path program 2 times [2024-06-20 16:03:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:47,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034497264] [2024-06-20 16:03:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:47,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:48,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034497264] [2024-06-20 16:03:48,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034497264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:48,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:48,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701932254] [2024-06-20 16:03:48,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:48,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:48,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:48,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:48,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 459 transitions, 5383 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:48,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:48,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:48,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:49,719 INFO L124 PetriNetUnfolderBase]: 2970/4699 cut-off events. [2024-06-20 16:03:49,720 INFO L125 PetriNetUnfolderBase]: For 735081/735084 co-relation queries the response was YES. [2024-06-20 16:03:49,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47976 conditions, 4699 events. 2970/4699 cut-off events. For 735081/735084 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27372 event pairs, 574 based on Foata normal form. 1/4695 useless extension candidates. Maximal degree in co-relation 47833. Up to 4277 conditions per place. [2024-06-20 16:03:49,787 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 40 changer transitions 0/484 dead transitions. [2024-06-20 16:03:49,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 484 transitions, 6476 flow [2024-06-20 16:03:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:03:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 16:03:49,788 INFO L175 Difference]: Start difference. First operand has 307 places, 459 transitions, 5383 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:03:49,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 484 transitions, 6476 flow [2024-06-20 16:03:51,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 484 transitions, 6340 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:51,162 INFO L231 Difference]: Finished difference. Result has 310 places, 462 transitions, 5416 flow [2024-06-20 16:03:51,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5416, PETRI_PLACES=310, PETRI_TRANSITIONS=462} [2024-06-20 16:03:51,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-20 16:03:51,162 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 462 transitions, 5416 flow [2024-06-20 16:03:51,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:51,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:51,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:51,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:03:51,163 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:51,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1852289331, now seen corresponding path program 1 times [2024-06-20 16:03:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070653412] [2024-06-20 16:03:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:52,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070653412] [2024-06-20 16:03:52,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070653412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:52,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:52,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398970881] [2024-06-20 16:03:52,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:52,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:52,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:52,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 462 transitions, 5416 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:52,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:52,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:52,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:53,576 INFO L124 PetriNetUnfolderBase]: 2980/4717 cut-off events. [2024-06-20 16:03:53,576 INFO L125 PetriNetUnfolderBase]: For 754553/754556 co-relation queries the response was YES. [2024-06-20 16:03:53,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48290 conditions, 4717 events. 2980/4717 cut-off events. For 754553/754556 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27522 event pairs, 572 based on Foata normal form. 2/4714 useless extension candidates. Maximal degree in co-relation 48146. Up to 4282 conditions per place. [2024-06-20 16:03:53,637 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 439 selfloop transitions, 45 changer transitions 0/489 dead transitions. [2024-06-20 16:03:53,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 489 transitions, 6574 flow [2024-06-20 16:03:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:03:53,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:03:53,639 INFO L175 Difference]: Start difference. First operand has 310 places, 462 transitions, 5416 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:03:53,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 489 transitions, 6574 flow [2024-06-20 16:03:54,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 489 transitions, 6427 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:54,946 INFO L231 Difference]: Finished difference. Result has 313 places, 466 transitions, 5504 flow [2024-06-20 16:03:54,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5504, PETRI_PLACES=313, PETRI_TRANSITIONS=466} [2024-06-20 16:03:54,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-20 16:03:54,946 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 466 transitions, 5504 flow [2024-06-20 16:03:54,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:54,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:54,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:03:54,947 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:54,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1852288959, now seen corresponding path program 3 times [2024-06-20 16:03:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189296193] [2024-06-20 16:03:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:54,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:55,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:55,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189296193] [2024-06-20 16:03:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189296193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018693027] [2024-06-20 16:03:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:55,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:55,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:55,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 466 transitions, 5504 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:55,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:55,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:55,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:57,064 INFO L124 PetriNetUnfolderBase]: 2985/4726 cut-off events. [2024-06-20 16:03:57,064 INFO L125 PetriNetUnfolderBase]: For 766858/766861 co-relation queries the response was YES. [2024-06-20 16:03:57,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48890 conditions, 4726 events. 2985/4726 cut-off events. For 766858/766861 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27565 event pairs, 572 based on Foata normal form. 1/4722 useless extension candidates. Maximal degree in co-relation 48745. Up to 4281 conditions per place. [2024-06-20 16:03:57,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 51 changer transitions 0/488 dead transitions. [2024-06-20 16:03:57,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 488 transitions, 6575 flow [2024-06-20 16:03:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:03:57,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:03:57,127 INFO L175 Difference]: Start difference. First operand has 313 places, 466 transitions, 5504 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:03:57,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 488 transitions, 6575 flow [2024-06-20 16:03:58,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 488 transitions, 6368 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:58,380 INFO L231 Difference]: Finished difference. Result has 314 places, 469 transitions, 5467 flow [2024-06-20 16:03:58,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5297, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5467, PETRI_PLACES=314, PETRI_TRANSITIONS=469} [2024-06-20 16:03:58,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 16:03:58,382 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 469 transitions, 5467 flow [2024-06-20 16:03:58,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:58,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:58,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:58,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:03:58,383 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:03:58,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1022382629, now seen corresponding path program 2 times [2024-06-20 16:03:58,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:58,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727742745] [2024-06-20 16:03:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:58,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727742745] [2024-06-20 16:03:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727742745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728861728] [2024-06-20 16:03:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:59,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:03:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 469 transitions, 5467 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:59,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:03:59,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:00,864 INFO L124 PetriNetUnfolderBase]: 2995/4745 cut-off events. [2024-06-20 16:04:00,865 INFO L125 PetriNetUnfolderBase]: For 787531/787534 co-relation queries the response was YES. [2024-06-20 16:04:00,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49105 conditions, 4745 events. 2995/4745 cut-off events. For 787531/787534 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 27761 event pairs, 566 based on Foata normal form. 4/4745 useless extension candidates. Maximal degree in co-relation 48959. Up to 4362 conditions per place. [2024-06-20 16:04:00,931 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 456 selfloop transitions, 33 changer transitions 0/494 dead transitions. [2024-06-20 16:04:00,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 494 transitions, 6643 flow [2024-06-20 16:04:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:04:00,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:04:00,935 INFO L175 Difference]: Start difference. First operand has 314 places, 469 transitions, 5467 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:04:00,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 494 transitions, 6643 flow [2024-06-20 16:04:02,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 494 transitions, 6504 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:02,279 INFO L231 Difference]: Finished difference. Result has 317 places, 473 transitions, 5547 flow [2024-06-20 16:04:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5547, PETRI_PLACES=317, PETRI_TRANSITIONS=473} [2024-06-20 16:04:02,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 16:04:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 473 transitions, 5547 flow [2024-06-20 16:04:02,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:02,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:02,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:04:02,280 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1186293772, now seen corresponding path program 1 times [2024-06-20 16:04:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29530855] [2024-06-20 16:04:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:03,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:03,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29530855] [2024-06-20 16:04:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29530855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:03,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:03,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:03,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423086245] [2024-06-20 16:04:03,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:03,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:03,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:03,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:03,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:03,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 473 transitions, 5547 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:03,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:03,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:03,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:04,389 INFO L124 PetriNetUnfolderBase]: 3035/4797 cut-off events. [2024-06-20 16:04:04,389 INFO L125 PetriNetUnfolderBase]: For 834770/834773 co-relation queries the response was YES. [2024-06-20 16:04:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50266 conditions, 4797 events. 3035/4797 cut-off events. For 834770/834773 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 28040 event pairs, 560 based on Foata normal form. 10/4803 useless extension candidates. Maximal degree in co-relation 50119. Up to 4400 conditions per place. [2024-06-20 16:04:04,459 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 461 selfloop transitions, 34 changer transitions 0/500 dead transitions. [2024-06-20 16:04:04,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 500 transitions, 6742 flow [2024-06-20 16:04:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:04:04,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:04:04,460 INFO L175 Difference]: Start difference. First operand has 317 places, 473 transitions, 5547 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:04:04,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 500 transitions, 6742 flow [2024-06-20 16:04:05,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 500 transitions, 6551 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:05,912 INFO L231 Difference]: Finished difference. Result has 319 places, 478 transitions, 5571 flow [2024-06-20 16:04:05,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5356, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5571, PETRI_PLACES=319, PETRI_TRANSITIONS=478} [2024-06-20 16:04:05,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 16:04:05,912 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 478 transitions, 5571 flow [2024-06-20 16:04:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:05,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:05,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:05,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:04:05,913 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:05,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash -986992199, now seen corresponding path program 3 times [2024-06-20 16:04:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618003560] [2024-06-20 16:04:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:05,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:07,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618003560] [2024-06-20 16:04:07,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618003560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:07,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:07,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253251406] [2024-06-20 16:04:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:07,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:07,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 478 transitions, 5571 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:07,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:07,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:07,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:08,525 INFO L124 PetriNetUnfolderBase]: 3045/4819 cut-off events. [2024-06-20 16:04:08,525 INFO L125 PetriNetUnfolderBase]: For 822247/822250 co-relation queries the response was YES. [2024-06-20 16:04:08,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50595 conditions, 4819 events. 3045/4819 cut-off events. For 822247/822250 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 28247 event pairs, 566 based on Foata normal form. 4/4819 useless extension candidates. Maximal degree in co-relation 50447. Up to 4381 conditions per place. [2024-06-20 16:04:08,595 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 451 selfloop transitions, 45 changer transitions 0/501 dead transitions. [2024-06-20 16:04:08,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 501 transitions, 6769 flow [2024-06-20 16:04:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:04:08,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:04:08,596 INFO L175 Difference]: Start difference. First operand has 319 places, 478 transitions, 5571 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:04:08,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 501 transitions, 6769 flow [2024-06-20 16:04:10,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 501 transitions, 6625 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:10,298 INFO L231 Difference]: Finished difference. Result has 321 places, 482 transitions, 5678 flow [2024-06-20 16:04:10,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5678, PETRI_PLACES=321, PETRI_TRANSITIONS=482} [2024-06-20 16:04:10,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-20 16:04:10,298 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 482 transitions, 5678 flow [2024-06-20 16:04:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:10,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:10,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:10,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:04:10,299 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:10,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1242843274, now seen corresponding path program 2 times [2024-06-20 16:04:10,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:10,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62376366] [2024-06-20 16:04:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:10,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:11,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:11,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62376366] [2024-06-20 16:04:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62376366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:11,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080140488] [2024-06-20 16:04:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:11,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:11,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 482 transitions, 5678 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:11,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:11,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:11,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:12,765 INFO L124 PetriNetUnfolderBase]: 3057/4836 cut-off events. [2024-06-20 16:04:12,765 INFO L125 PetriNetUnfolderBase]: For 846626/846629 co-relation queries the response was YES. [2024-06-20 16:04:12,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50984 conditions, 4836 events. 3057/4836 cut-off events. For 846626/846629 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 28315 event pairs, 562 based on Foata normal form. 6/4838 useless extension candidates. Maximal degree in co-relation 50835. Up to 4392 conditions per place. [2024-06-20 16:04:12,835 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 455 selfloop transitions, 46 changer transitions 0/506 dead transitions. [2024-06-20 16:04:12,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 506 transitions, 6870 flow [2024-06-20 16:04:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:04:12,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:04:12,836 INFO L175 Difference]: Start difference. First operand has 321 places, 482 transitions, 5678 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:04:12,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 506 transitions, 6870 flow [2024-06-20 16:04:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 506 transitions, 6647 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:14,661 INFO L231 Difference]: Finished difference. Result has 323 places, 487 transitions, 5695 flow [2024-06-20 16:04:14,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5695, PETRI_PLACES=323, PETRI_TRANSITIONS=487} [2024-06-20 16:04:14,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-20 16:04:14,662 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 487 transitions, 5695 flow [2024-06-20 16:04:14,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:14,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:14,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:14,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:04:14,663 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:14,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -979373422, now seen corresponding path program 3 times [2024-06-20 16:04:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017999338] [2024-06-20 16:04:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:15,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:15,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017999338] [2024-06-20 16:04:15,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017999338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:15,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:15,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383140057] [2024-06-20 16:04:15,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:15,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:15,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 487 transitions, 5695 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:15,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:15,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:15,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:16,966 INFO L124 PetriNetUnfolderBase]: 3077/4862 cut-off events. [2024-06-20 16:04:16,966 INFO L125 PetriNetUnfolderBase]: For 858213/858216 co-relation queries the response was YES. [2024-06-20 16:04:17,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51515 conditions, 4862 events. 3077/4862 cut-off events. For 858213/858216 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 28417 event pairs, 562 based on Foata normal form. 6/4864 useless extension candidates. Maximal degree in co-relation 51365. Up to 4155 conditions per place. [2024-06-20 16:04:17,159 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 101 changer transitions 0/513 dead transitions. [2024-06-20 16:04:17,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 513 transitions, 7122 flow [2024-06-20 16:04:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:04:17,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:04:17,161 INFO L175 Difference]: Start difference. First operand has 323 places, 487 transitions, 5695 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:04:17,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 513 transitions, 7122 flow [2024-06-20 16:04:18,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 513 transitions, 6936 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:18,590 INFO L231 Difference]: Finished difference. Result has 325 places, 491 transitions, 5836 flow [2024-06-20 16:04:18,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5836, PETRI_PLACES=325, PETRI_TRANSITIONS=491} [2024-06-20 16:04:18,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-20 16:04:18,590 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 491 transitions, 5836 flow [2024-06-20 16:04:18,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:18,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:18,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:18,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:04:18,591 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:18,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2000106538, now seen corresponding path program 4 times [2024-06-20 16:04:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:18,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457621291] [2024-06-20 16:04:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457621291] [2024-06-20 16:04:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457621291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:19,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:19,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415221309] [2024-06-20 16:04:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:19,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:19,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:19,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:19,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 491 transitions, 5836 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:19,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:19,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:19,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:20,882 INFO L124 PetriNetUnfolderBase]: 3089/4879 cut-off events. [2024-06-20 16:04:20,882 INFO L125 PetriNetUnfolderBase]: For 871095/871098 co-relation queries the response was YES. [2024-06-20 16:04:20,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51911 conditions, 4879 events. 3089/4879 cut-off events. For 871095/871098 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28563 event pairs, 560 based on Foata normal form. 6/4881 useless extension candidates. Maximal degree in co-relation 51760. Up to 4165 conditions per place. [2024-06-20 16:04:20,955 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 410 selfloop transitions, 103 changer transitions 0/518 dead transitions. [2024-06-20 16:04:20,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 518 transitions, 7301 flow [2024-06-20 16:04:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:04:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 16:04:20,956 INFO L175 Difference]: Start difference. First operand has 325 places, 491 transitions, 5836 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:04:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 518 transitions, 7301 flow [2024-06-20 16:04:22,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 518 transitions, 7084 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:22,541 INFO L231 Difference]: Finished difference. Result has 328 places, 495 transitions, 5952 flow [2024-06-20 16:04:22,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5952, PETRI_PLACES=328, PETRI_TRANSITIONS=495} [2024-06-20 16:04:22,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-20 16:04:22,542 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 495 transitions, 5952 flow [2024-06-20 16:04:22,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:22,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:22,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:22,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:04:22,542 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:22,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1235491841, now seen corresponding path program 4 times [2024-06-20 16:04:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128911037] [2024-06-20 16:04:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:23,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:23,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128911037] [2024-06-20 16:04:23,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128911037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:23,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:23,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661985871] [2024-06-20 16:04:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:23,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:23,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:23,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 495 transitions, 5952 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:23,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:23,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:23,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:25,231 INFO L124 PetriNetUnfolderBase]: 3115/4921 cut-off events. [2024-06-20 16:04:25,231 INFO L125 PetriNetUnfolderBase]: For 891161/891164 co-relation queries the response was YES. [2024-06-20 16:04:25,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52786 conditions, 4921 events. 3115/4921 cut-off events. For 891161/891164 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 28822 event pairs, 560 based on Foata normal form. 4/4921 useless extension candidates. Maximal degree in co-relation 52634. Up to 4378 conditions per place. [2024-06-20 16:04:25,302 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 446 selfloop transitions, 71 changer transitions 0/522 dead transitions. [2024-06-20 16:04:25,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 522 transitions, 7556 flow [2024-06-20 16:04:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:04:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:04:25,304 INFO L175 Difference]: Start difference. First operand has 328 places, 495 transitions, 5952 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:04:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 522 transitions, 7556 flow [2024-06-20 16:04:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 522 transitions, 7351 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:26,806 INFO L231 Difference]: Finished difference. Result has 331 places, 502 transitions, 6160 flow [2024-06-20 16:04:26,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6160, PETRI_PLACES=331, PETRI_TRANSITIONS=502} [2024-06-20 16:04:26,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 16:04:26,807 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 502 transitions, 6160 flow [2024-06-20 16:04:26,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:26,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:26,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:26,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:04:26,807 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:26,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1235614973, now seen corresponding path program 4 times [2024-06-20 16:04:26,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:26,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712768815] [2024-06-20 16:04:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:26,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712768815] [2024-06-20 16:04:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712768815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:27,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:27,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:27,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101066727] [2024-06-20 16:04:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:27,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:27,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 502 transitions, 6160 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:27,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:27,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:27,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:29,114 INFO L124 PetriNetUnfolderBase]: 3159/4989 cut-off events. [2024-06-20 16:04:29,115 INFO L125 PetriNetUnfolderBase]: For 970698/970701 co-relation queries the response was YES. [2024-06-20 16:04:29,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53900 conditions, 4989 events. 3159/4989 cut-off events. For 970698/970701 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29289 event pairs, 564 based on Foata normal form. 14/4999 useless extension candidates. Maximal degree in co-relation 53747. Up to 4441 conditions per place. [2024-06-20 16:04:29,179 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 454 selfloop transitions, 68 changer transitions 0/527 dead transitions. [2024-06-20 16:04:29,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 527 transitions, 7490 flow [2024-06-20 16:04:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:04:29,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:04:29,181 INFO L175 Difference]: Start difference. First operand has 331 places, 502 transitions, 6160 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:04:29,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 527 transitions, 7490 flow [2024-06-20 16:04:31,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 527 transitions, 7286 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:31,121 INFO L231 Difference]: Finished difference. Result has 335 places, 505 transitions, 6255 flow [2024-06-20 16:04:31,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6255, PETRI_PLACES=335, PETRI_TRANSITIONS=505} [2024-06-20 16:04:31,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-20 16:04:31,130 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 505 transitions, 6255 flow [2024-06-20 16:04:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:31,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:31,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:31,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:04:31,131 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:31,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1246339733, now seen corresponding path program 5 times [2024-06-20 16:04:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:31,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451448192] [2024-06-20 16:04:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:31,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451448192] [2024-06-20 16:04:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451448192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:32,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:32,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164256168] [2024-06-20 16:04:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:32,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:32,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 505 transitions, 6255 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:32,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:32,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:32,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:33,682 INFO L124 PetriNetUnfolderBase]: 3203/5057 cut-off events. [2024-06-20 16:04:33,682 INFO L125 PetriNetUnfolderBase]: For 992777/992780 co-relation queries the response was YES. [2024-06-20 16:04:33,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55172 conditions, 5057 events. 3203/5057 cut-off events. For 992777/992780 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29764 event pairs, 568 based on Foata normal form. 14/5067 useless extension candidates. Maximal degree in co-relation 55017. Up to 4580 conditions per place. [2024-06-20 16:04:33,757 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 481 selfloop transitions, 45 changer transitions 0/531 dead transitions. [2024-06-20 16:04:33,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 531 transitions, 7607 flow [2024-06-20 16:04:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:04:33,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:04:33,759 INFO L175 Difference]: Start difference. First operand has 335 places, 505 transitions, 6255 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:04:33,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 531 transitions, 7607 flow [2024-06-20 16:04:36,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 531 transitions, 7368 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:36,080 INFO L231 Difference]: Finished difference. Result has 337 places, 508 transitions, 6275 flow [2024-06-20 16:04:36,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=337, PETRI_TRANSITIONS=508} [2024-06-20 16:04:36,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-20 16:04:36,080 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 508 transitions, 6275 flow [2024-06-20 16:04:36,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:36,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:36,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:36,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:04:36,081 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:36,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:36,081 INFO L85 PathProgramCache]: Analyzing trace with hash -990814871, now seen corresponding path program 6 times [2024-06-20 16:04:36,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:36,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683283911] [2024-06-20 16:04:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:36,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:37,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:37,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683283911] [2024-06-20 16:04:37,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683283911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:37,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:37,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:37,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589794733] [2024-06-20 16:04:37,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:37,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:37,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 508 transitions, 6275 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:37,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:37,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:37,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:38,548 INFO L124 PetriNetUnfolderBase]: 3247/5121 cut-off events. [2024-06-20 16:04:38,549 INFO L125 PetriNetUnfolderBase]: For 1011877/1011880 co-relation queries the response was YES. [2024-06-20 16:04:38,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56026 conditions, 5121 events. 3247/5121 cut-off events. For 1011877/1011880 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30179 event pairs, 564 based on Foata normal form. 14/5131 useless extension candidates. Maximal degree in co-relation 55870. Up to 4593 conditions per place. [2024-06-20 16:04:38,629 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 492 selfloop transitions, 42 changer transitions 0/539 dead transitions. [2024-06-20 16:04:38,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 539 transitions, 7771 flow [2024-06-20 16:04:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:04:38,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:04:38,630 INFO L175 Difference]: Start difference. First operand has 337 places, 508 transitions, 6275 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:04:38,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 539 transitions, 7771 flow [2024-06-20 16:04:40,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 539 transitions, 7572 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:40,944 INFO L231 Difference]: Finished difference. Result has 339 places, 511 transitions, 6334 flow [2024-06-20 16:04:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6334, PETRI_PLACES=339, PETRI_TRANSITIONS=511} [2024-06-20 16:04:40,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 16:04:40,945 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 511 transitions, 6334 flow [2024-06-20 16:04:40,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:40,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:40,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:04:40,945 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:40,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -979363502, now seen corresponding path program 1 times [2024-06-20 16:04:40,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:40,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280045328] [2024-06-20 16:04:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:40,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:42,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280045328] [2024-06-20 16:04:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280045328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:42,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:42,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:42,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268203060] [2024-06-20 16:04:42,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:42,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:42,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:42,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 511 transitions, 6334 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) [2024-06-20 16:04:42,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:42,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:42,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:43,392 INFO L124 PetriNetUnfolderBase]: 3255/5134 cut-off events. [2024-06-20 16:04:43,393 INFO L125 PetriNetUnfolderBase]: For 977934/977934 co-relation queries the response was YES. [2024-06-20 16:04:43,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56367 conditions, 5134 events. 3255/5134 cut-off events. For 977934/977934 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30324 event pairs, 584 based on Foata normal form. 2/5133 useless extension candidates. Maximal degree in co-relation 56210. Up to 4823 conditions per place. [2024-06-20 16:04:43,471 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 505 selfloop transitions, 22 changer transitions 0/532 dead transitions. [2024-06-20 16:04:43,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 532 transitions, 7589 flow [2024-06-20 16:04:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:04:43,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:04:43,473 INFO L175 Difference]: Start difference. First operand has 339 places, 511 transitions, 6334 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:04:43,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 532 transitions, 7589 flow [2024-06-20 16:04:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 532 transitions, 7389 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:45,564 INFO L231 Difference]: Finished difference. Result has 341 places, 513 transitions, 6335 flow [2024-06-20 16:04:45,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6134, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=341, PETRI_TRANSITIONS=513} [2024-06-20 16:04:45,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-20 16:04:45,565 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 513 transitions, 6335 flow [2024-06-20 16:04:45,565 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) [2024-06-20 16:04:45,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:45,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:45,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:04:45,566 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:45,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:45,566 INFO L85 PathProgramCache]: Analyzing trace with hash -265378149, now seen corresponding path program 4 times [2024-06-20 16:04:45,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:45,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422089321] [2024-06-20 16:04:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:46,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422089321] [2024-06-20 16:04:46,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422089321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:46,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310500518] [2024-06-20 16:04:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:46,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:46,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:46,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:46,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 513 transitions, 6335 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:46,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:46,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:46,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:47,806 INFO L124 PetriNetUnfolderBase]: 3252/5132 cut-off events. [2024-06-20 16:04:47,807 INFO L125 PetriNetUnfolderBase]: For 977513/977516 co-relation queries the response was YES. [2024-06-20 16:04:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55948 conditions, 5132 events. 3252/5132 cut-off events. For 977513/977516 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30314 event pairs, 592 based on Foata normal form. 1/5128 useless extension candidates. Maximal degree in co-relation 55790. Up to 4677 conditions per place. [2024-06-20 16:04:47,883 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 478 selfloop transitions, 52 changer transitions 0/535 dead transitions. [2024-06-20 16:04:47,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 535 transitions, 7461 flow [2024-06-20 16:04:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-20 16:04:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-20 16:04:47,884 INFO L175 Difference]: Start difference. First operand has 341 places, 513 transitions, 6335 flow. Second operand 7 states and 139 transitions. [2024-06-20 16:04:47,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 535 transitions, 7461 flow [2024-06-20 16:04:50,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 535 transitions, 7252 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:50,069 INFO L231 Difference]: Finished difference. Result has 341 places, 513 transitions, 6249 flow [2024-06-20 16:04:50,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6249, PETRI_PLACES=341, PETRI_TRANSITIONS=513} [2024-06-20 16:04:50,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-20 16:04:50,069 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 513 transitions, 6249 flow [2024-06-20 16:04:50,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:50,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:50,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:04:50,070 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:50,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1181806833, now seen corresponding path program 5 times [2024-06-20 16:04:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531957902] [2024-06-20 16:04:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:50,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531957902] [2024-06-20 16:04:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531957902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:51,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:51,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44076686] [2024-06-20 16:04:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:51,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:51,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:51,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 513 transitions, 6249 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:51,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:51,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:51,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:52,495 INFO L124 PetriNetUnfolderBase]: 3257/5129 cut-off events. [2024-06-20 16:04:52,495 INFO L125 PetriNetUnfolderBase]: For 989534/989540 co-relation queries the response was YES. [2024-06-20 16:04:52,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56098 conditions, 5129 events. 3257/5129 cut-off events. For 989534/989540 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30214 event pairs, 612 based on Foata normal form. 2/5118 useless extension candidates. Maximal degree in co-relation 55939. Up to 4696 conditions per place. [2024-06-20 16:04:52,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 487 selfloop transitions, 45 changer transitions 0/537 dead transitions. [2024-06-20 16:04:52,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 537 transitions, 7507 flow [2024-06-20 16:04:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:04:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:04:52,574 INFO L175 Difference]: Start difference. First operand has 341 places, 513 transitions, 6249 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:04:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 537 transitions, 7507 flow [2024-06-20 16:04:54,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 537 transitions, 7354 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:54,652 INFO L231 Difference]: Finished difference. Result has 344 places, 516 transitions, 6338 flow [2024-06-20 16:04:54,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6338, PETRI_PLACES=344, PETRI_TRANSITIONS=516} [2024-06-20 16:04:54,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 16:04:54,652 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 516 transitions, 6338 flow [2024-06-20 16:04:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:54,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:54,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:54,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:04:54,653 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:54,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1780526631, now seen corresponding path program 6 times [2024-06-20 16:04:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140939777] [2024-06-20 16:04:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:56,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:56,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140939777] [2024-06-20 16:04:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140939777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:56,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:56,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665622138] [2024-06-20 16:04:56,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:56,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:56,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 516 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:56,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:56,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:56,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:57,713 INFO L124 PetriNetUnfolderBase]: 3254/5131 cut-off events. [2024-06-20 16:04:57,713 INFO L125 PetriNetUnfolderBase]: For 971267/971273 co-relation queries the response was YES. [2024-06-20 16:04:57,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56024 conditions, 5131 events. 3254/5131 cut-off events. For 971267/971273 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30272 event pairs, 600 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 55864. Up to 4760 conditions per place. [2024-06-20 16:04:57,789 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 503 selfloop transitions, 30 changer transitions 0/538 dead transitions. [2024-06-20 16:04:57,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 538 transitions, 7588 flow [2024-06-20 16:04:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:04:57,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:04:57,791 INFO L175 Difference]: Start difference. First operand has 344 places, 516 transitions, 6338 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:04:57,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 538 transitions, 7588 flow [2024-06-20 16:05:00,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 538 transitions, 7368 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:00,060 INFO L231 Difference]: Finished difference. Result has 346 places, 519 transitions, 6320 flow [2024-06-20 16:05:00,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6118, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6320, PETRI_PLACES=346, PETRI_TRANSITIONS=519} [2024-06-20 16:05:00,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 16:05:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 519 transitions, 6320 flow [2024-06-20 16:05:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:00,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:00,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:05:00,061 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:00,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1751474572, now seen corresponding path program 5 times [2024-06-20 16:05:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:00,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909008932] [2024-06-20 16:05:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:01,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:01,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909008932] [2024-06-20 16:05:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909008932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:01,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:01,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047991646] [2024-06-20 16:05:01,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:01,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:01,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 519 transitions, 6320 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:01,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:01,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:01,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:02,396 INFO L124 PetriNetUnfolderBase]: 3254/5129 cut-off events. [2024-06-20 16:05:02,396 INFO L125 PetriNetUnfolderBase]: For 992474/992480 co-relation queries the response was YES. [2024-06-20 16:05:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55899 conditions, 5129 events. 3254/5129 cut-off events. For 992474/992480 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30206 event pairs, 600 based on Foata normal form. 5/5125 useless extension candidates. Maximal degree in co-relation 55738. Up to 4751 conditions per place. [2024-06-20 16:05:02,470 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 507 selfloop transitions, 31 changer transitions 0/543 dead transitions. [2024-06-20 16:05:02,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 543 transitions, 7604 flow [2024-06-20 16:05:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:05:02,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:05:02,472 INFO L175 Difference]: Start difference. First operand has 346 places, 519 transitions, 6320 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:05:02,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 543 transitions, 7604 flow [2024-06-20 16:05:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 543 transitions, 7428 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:04,665 INFO L231 Difference]: Finished difference. Result has 348 places, 523 transitions, 6357 flow [2024-06-20 16:05:04,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6357, PETRI_PLACES=348, PETRI_TRANSITIONS=523} [2024-06-20 16:05:04,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-20 16:05:04,665 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 523 transitions, 6357 flow [2024-06-20 16:05:04,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:04,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:04,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:04,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:05:04,666 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:04,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1863475317, now seen corresponding path program 7 times [2024-06-20 16:05:04,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514318697] [2024-06-20 16:05:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514318697] [2024-06-20 16:05:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514318697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654588715] [2024-06-20 16:05:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:06,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:06,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 523 transitions, 6357 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:06,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:06,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:06,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:07,244 INFO L124 PetriNetUnfolderBase]: 3259/5130 cut-off events. [2024-06-20 16:05:07,244 INFO L125 PetriNetUnfolderBase]: For 991824/991830 co-relation queries the response was YES. [2024-06-20 16:05:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56140 conditions, 5130 events. 3259/5130 cut-off events. For 991824/991830 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30193 event pairs, 612 based on Foata normal form. 2/5119 useless extension candidates. Maximal degree in co-relation 55978. Up to 4699 conditions per place. [2024-06-20 16:05:07,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 496 selfloop transitions, 46 changer transitions 0/547 dead transitions. [2024-06-20 16:05:07,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 547 transitions, 7643 flow [2024-06-20 16:05:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:05:07,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:05:07,322 INFO L175 Difference]: Start difference. First operand has 348 places, 523 transitions, 6357 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:05:07,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 547 transitions, 7643 flow [2024-06-20 16:05:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 547 transitions, 7500 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:09,460 INFO L231 Difference]: Finished difference. Result has 350 places, 526 transitions, 6466 flow [2024-06-20 16:05:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6466, PETRI_PLACES=350, PETRI_TRANSITIONS=526} [2024-06-20 16:05:09,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 16:05:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 526 transitions, 6466 flow [2024-06-20 16:05:09,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:09,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:05:09,461 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:09,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1006553155, now seen corresponding path program 5 times [2024-06-20 16:05:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351810491] [2024-06-20 16:05:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351810491] [2024-06-20 16:05:10,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351810491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:05:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751304950] [2024-06-20 16:05:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:05:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:05:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:05:10,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:10,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 526 transitions, 6466 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:10,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:10,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:11,836 INFO L124 PetriNetUnfolderBase]: 3254/5133 cut-off events. [2024-06-20 16:05:11,837 INFO L125 PetriNetUnfolderBase]: For 1002118/1002121 co-relation queries the response was YES. [2024-06-20 16:05:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56260 conditions, 5133 events. 3254/5133 cut-off events. For 1002118/1002121 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30297 event pairs, 590 based on Foata normal form. 1/5129 useless extension candidates. Maximal degree in co-relation 56097. Up to 4606 conditions per place. [2024-06-20 16:05:11,914 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 77 changer transitions 0/543 dead transitions. [2024-06-20 16:05:11,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 543 transitions, 7598 flow [2024-06-20 16:05:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:05:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:05:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 16:05:11,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-20 16:05:11,916 INFO L175 Difference]: Start difference. First operand has 350 places, 526 transitions, 6466 flow. Second operand 7 states and 134 transitions. [2024-06-20 16:05:11,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 543 transitions, 7598 flow [2024-06-20 16:05:14,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 543 transitions, 7336 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:14,109 INFO L231 Difference]: Finished difference. Result has 350 places, 526 transitions, 6377 flow [2024-06-20 16:05:14,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6204, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6377, PETRI_PLACES=350, PETRI_TRANSITIONS=526} [2024-06-20 16:05:14,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 16:05:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 526 transitions, 6377 flow [2024-06-20 16:05:14,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:14,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:14,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:14,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:05:14,110 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:14,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1831820033, now seen corresponding path program 6 times [2024-06-20 16:05:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:14,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465382648] [2024-06-20 16:05:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:15,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:15,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465382648] [2024-06-20 16:05:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465382648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:15,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:05:15,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894175079] [2024-06-20 16:05:15,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:15,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:05:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:05:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:05:15,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:15,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 526 transitions, 6377 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:15,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:15,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:15,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:16,456 INFO L124 PetriNetUnfolderBase]: 3251/5129 cut-off events. [2024-06-20 16:05:16,456 INFO L125 PetriNetUnfolderBase]: For 1010229/1010238 co-relation queries the response was YES. [2024-06-20 16:05:16,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56160 conditions, 5129 events. 3251/5129 cut-off events. For 1010229/1010238 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30328 event pairs, 648 based on Foata normal form. 2/5121 useless extension candidates. Maximal degree in co-relation 55996. Up to 4528 conditions per place. [2024-06-20 16:05:16,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 102 changer transitions 0/541 dead transitions. [2024-06-20 16:05:16,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 541 transitions, 7613 flow [2024-06-20 16:05:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:05:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:05:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:05:16,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 16:05:16,529 INFO L175 Difference]: Start difference. First operand has 350 places, 526 transitions, 6377 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:05:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 541 transitions, 7613 flow [2024-06-20 16:05:18,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 541 transitions, 7457 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:18,834 INFO L231 Difference]: Finished difference. Result has 351 places, 529 transitions, 6567 flow [2024-06-20 16:05:18,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6567, PETRI_PLACES=351, PETRI_TRANSITIONS=529} [2024-06-20 16:05:18,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-20 16:05:18,835 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 529 transitions, 6567 flow [2024-06-20 16:05:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:18,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:18,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:18,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:05:18,835 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:18,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1831820405, now seen corresponding path program 8 times [2024-06-20 16:05:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:18,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801543472] [2024-06-20 16:05:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:18,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:19,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:19,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801543472] [2024-06-20 16:05:19,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801543472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:19,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:19,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:19,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022714889] [2024-06-20 16:05:19,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:19,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:19,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:20,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:20,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 529 transitions, 6567 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:20,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:20,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:20,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:21,419 INFO L124 PetriNetUnfolderBase]: 3256/5126 cut-off events. [2024-06-20 16:05:21,420 INFO L125 PetriNetUnfolderBase]: For 1016813/1016819 co-relation queries the response was YES. [2024-06-20 16:05:21,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56755 conditions, 5126 events. 3256/5126 cut-off events. For 1016813/1016819 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30211 event pairs, 612 based on Foata normal form. 2/5115 useless extension candidates. Maximal degree in co-relation 56590. Up to 4680 conditions per place. [2024-06-20 16:05:21,491 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 487 selfloop transitions, 58 changer transitions 0/550 dead transitions. [2024-06-20 16:05:21,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 550 transitions, 7859 flow [2024-06-20 16:05:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:05:21,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:05:21,492 INFO L175 Difference]: Start difference. First operand has 351 places, 529 transitions, 6567 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:05:21,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 550 transitions, 7859 flow [2024-06-20 16:05:24,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 550 transitions, 7565 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:24,295 INFO L231 Difference]: Finished difference. Result has 355 places, 532 transitions, 6557 flow [2024-06-20 16:05:24,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6273, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6557, PETRI_PLACES=355, PETRI_TRANSITIONS=532} [2024-06-20 16:05:24,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-20 16:05:24,295 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 532 transitions, 6557 flow [2024-06-20 16:05:24,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:24,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:24,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:05:24,296 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:24,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1551382481, now seen corresponding path program 9 times [2024-06-20 16:05:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071740632] [2024-06-20 16:05:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071740632] [2024-06-20 16:05:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071740632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:25,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:25,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:25,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606087700] [2024-06-20 16:05:25,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:25,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:25,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:25,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:25,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 532 transitions, 6557 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:25,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:26,871 INFO L124 PetriNetUnfolderBase]: 3261/5135 cut-off events. [2024-06-20 16:05:26,872 INFO L125 PetriNetUnfolderBase]: For 1036998/1037004 co-relation queries the response was YES. [2024-06-20 16:05:26,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57164 conditions, 5135 events. 3261/5135 cut-off events. For 1036998/1037004 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30273 event pairs, 612 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 56998. Up to 4669 conditions per place. [2024-06-20 16:05:26,945 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 478 selfloop transitions, 73 changer transitions 0/556 dead transitions. [2024-06-20 16:05:26,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 556 transitions, 7921 flow [2024-06-20 16:05:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:05:26,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:05:26,947 INFO L175 Difference]: Start difference. First operand has 355 places, 532 transitions, 6557 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:05:26,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 556 transitions, 7921 flow [2024-06-20 16:05:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 556 transitions, 7659 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:29,486 INFO L231 Difference]: Finished difference. Result has 358 places, 538 transitions, 6694 flow [2024-06-20 16:05:29,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6295, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6694, PETRI_PLACES=358, PETRI_TRANSITIONS=538} [2024-06-20 16:05:29,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-20 16:05:29,487 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 538 transitions, 6694 flow [2024-06-20 16:05:29,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:29,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:29,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:05:29,503 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:29,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1383455311, now seen corresponding path program 10 times [2024-06-20 16:05:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:29,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533913993] [2024-06-20 16:05:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:29,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:31,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:31,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533913993] [2024-06-20 16:05:31,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533913993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:31,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914800417] [2024-06-20 16:05:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:31,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:31,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 538 transitions, 6694 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:31,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:31,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:31,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:32,520 INFO L124 PetriNetUnfolderBase]: 3266/5142 cut-off events. [2024-06-20 16:05:32,520 INFO L125 PetriNetUnfolderBase]: For 1058990/1058996 co-relation queries the response was YES. [2024-06-20 16:05:32,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57708 conditions, 5142 events. 3266/5142 cut-off events. For 1058990/1058996 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30296 event pairs, 610 based on Foata normal form. 2/5131 useless extension candidates. Maximal degree in co-relation 57540. Up to 4653 conditions per place. [2024-06-20 16:05:32,598 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 476 selfloop transitions, 77 changer transitions 0/558 dead transitions. [2024-06-20 16:05:32,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 558 transitions, 8022 flow [2024-06-20 16:05:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:05:32,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:05:32,599 INFO L175 Difference]: Start difference. First operand has 358 places, 538 transitions, 6694 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:05:32,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 558 transitions, 8022 flow [2024-06-20 16:05:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 558 transitions, 7760 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:35,048 INFO L231 Difference]: Finished difference. Result has 362 places, 541 transitions, 6766 flow [2024-06-20 16:05:35,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6766, PETRI_PLACES=362, PETRI_TRANSITIONS=541} [2024-06-20 16:05:35,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-20 16:05:35,049 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 541 transitions, 6766 flow [2024-06-20 16:05:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:35,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:35,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:05:35,049 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:35,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1380576622, now seen corresponding path program 6 times [2024-06-20 16:05:35,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:35,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320658245] [2024-06-20 16:05:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:35,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:36,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:36,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320658245] [2024-06-20 16:05:36,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320658245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:36,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:36,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5777134] [2024-06-20 16:05:36,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:36,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:36,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 541 transitions, 6766 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:36,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:36,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:37,607 INFO L124 PetriNetUnfolderBase]: 3286/5172 cut-off events. [2024-06-20 16:05:37,607 INFO L125 PetriNetUnfolderBase]: For 1097952/1097958 co-relation queries the response was YES. [2024-06-20 16:05:37,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58514 conditions, 5172 events. 3286/5172 cut-off events. For 1097952/1097958 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30503 event pairs, 594 based on Foata normal form. 5/5168 useless extension candidates. Maximal degree in co-relation 58344. Up to 4770 conditions per place. [2024-06-20 16:05:37,682 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 516 selfloop transitions, 42 changer transitions 0/563 dead transitions. [2024-06-20 16:05:37,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 563 transitions, 8067 flow [2024-06-20 16:05:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:05:37,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:05:37,683 INFO L175 Difference]: Start difference. First operand has 362 places, 541 transitions, 6766 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:05:37,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 563 transitions, 8067 flow [2024-06-20 16:05:40,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 563 transitions, 7749 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:40,307 INFO L231 Difference]: Finished difference. Result has 364 places, 545 transitions, 6660 flow [2024-06-20 16:05:40,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6660, PETRI_PLACES=364, PETRI_TRANSITIONS=545} [2024-06-20 16:05:40,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 16:05:40,307 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 545 transitions, 6660 flow [2024-06-20 16:05:40,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:40,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:40,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:40,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:05:40,308 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:40,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1367452679, now seen corresponding path program 11 times [2024-06-20 16:05:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:40,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860972323] [2024-06-20 16:05:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:41,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860972323] [2024-06-20 16:05:41,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860972323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:41,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:41,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:41,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487510904] [2024-06-20 16:05:41,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:41,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:41,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:41,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:41,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 545 transitions, 6660 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:41,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:41,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:41,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:43,130 INFO L124 PetriNetUnfolderBase]: 3299/5198 cut-off events. [2024-06-20 16:05:43,130 INFO L125 PetriNetUnfolderBase]: For 1104758/1104764 co-relation queries the response was YES. [2024-06-20 16:05:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59043 conditions, 5198 events. 3299/5198 cut-off events. For 1104758/1104764 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30742 event pairs, 598 based on Foata normal form. 2/5191 useless extension candidates. Maximal degree in co-relation 58872. Up to 4748 conditions per place. [2024-06-20 16:05:43,210 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 70 changer transitions 0/570 dead transitions. [2024-06-20 16:05:43,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 570 transitions, 8438 flow [2024-06-20 16:05:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:05:43,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:05:43,211 INFO L175 Difference]: Start difference. First operand has 364 places, 545 transitions, 6660 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:05:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 570 transitions, 8438 flow [2024-06-20 16:05:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 570 transitions, 8289 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:46,072 INFO L231 Difference]: Finished difference. Result has 367 places, 553 transitions, 7053 flow [2024-06-20 16:05:46,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7053, PETRI_PLACES=367, PETRI_TRANSITIONS=553} [2024-06-20 16:05:46,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 16:05:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 553 transitions, 7053 flow [2024-06-20 16:05:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:46,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:05:46,074 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash -108888320, now seen corresponding path program 7 times [2024-06-20 16:05:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:46,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949567694] [2024-06-20 16:05:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:47,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:47,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949567694] [2024-06-20 16:05:47,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949567694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:47,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:47,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383301532] [2024-06-20 16:05:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:47,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:47,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 553 transitions, 7053 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:47,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:48,680 INFO L124 PetriNetUnfolderBase]: 3309/5212 cut-off events. [2024-06-20 16:05:48,680 INFO L125 PetriNetUnfolderBase]: For 1133105/1133105 co-relation queries the response was YES. [2024-06-20 16:05:48,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59584 conditions, 5212 events. 3309/5212 cut-off events. For 1133105/1133105 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30794 event pairs, 576 based on Foata normal form. 2/5211 useless extension candidates. Maximal degree in co-relation 59411. Up to 4899 conditions per place. [2024-06-20 16:05:48,759 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 540 selfloop transitions, 26 changer transitions 0/571 dead transitions. [2024-06-20 16:05:48,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 571 transitions, 8327 flow [2024-06-20 16:05:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:05:48,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:05:48,760 INFO L175 Difference]: Start difference. First operand has 367 places, 553 transitions, 7053 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:05:48,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 571 transitions, 8327 flow [2024-06-20 16:05:51,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 571 transitions, 8051 flow, removed 105 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:51,580 INFO L231 Difference]: Finished difference. Result has 371 places, 557 transitions, 6952 flow [2024-06-20 16:05:51,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6952, PETRI_PLACES=371, PETRI_TRANSITIONS=557} [2024-06-20 16:05:51,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 16:05:51,581 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 557 transitions, 6952 flow [2024-06-20 16:05:51,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:51,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:51,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:51,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:05:51,581 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:51,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1367689829, now seen corresponding path program 12 times [2024-06-20 16:05:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:51,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136970307] [2024-06-20 16:05:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:52,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:52,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136970307] [2024-06-20 16:05:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136970307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:52,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121389016] [2024-06-20 16:05:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:52,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:52,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:52,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:53,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:53,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 557 transitions, 6952 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:53,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:53,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:53,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:54,513 INFO L124 PetriNetUnfolderBase]: 3306/5201 cut-off events. [2024-06-20 16:05:54,514 INFO L125 PetriNetUnfolderBase]: For 1130370/1130370 co-relation queries the response was YES. [2024-06-20 16:05:54,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59515 conditions, 5201 events. 3306/5201 cut-off events. For 1130370/1130370 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 30679 event pairs, 602 based on Foata normal form. 1/5192 useless extension candidates. Maximal degree in co-relation 59340. Up to 4643 conditions per place. [2024-06-20 16:05:54,598 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 450 selfloop transitions, 119 changer transitions 0/574 dead transitions. [2024-06-20 16:05:54,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 574 transitions, 8177 flow [2024-06-20 16:05:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:05:54,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:05:54,599 INFO L175 Difference]: Start difference. First operand has 371 places, 557 transitions, 6952 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:05:54,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 574 transitions, 8177 flow [2024-06-20 16:05:57,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 574 transitions, 7878 flow, removed 116 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:57,676 INFO L231 Difference]: Finished difference. Result has 373 places, 558 transitions, 6938 flow [2024-06-20 16:05:57,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6683, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6938, PETRI_PLACES=373, PETRI_TRANSITIONS=558} [2024-06-20 16:05:57,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 16:05:57,676 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 558 transitions, 6938 flow [2024-06-20 16:05:57,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:57,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:57,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:57,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:05:57,677 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:57,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1367689612, now seen corresponding path program 8 times [2024-06-20 16:05:57,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:57,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677844588] [2024-06-20 16:05:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:57,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677844588] [2024-06-20 16:05:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677844588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:58,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159148110] [2024-06-20 16:05:58,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:58,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:58,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 558 transitions, 6938 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:58,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:58,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:58,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:00,211 INFO L124 PetriNetUnfolderBase]: 3342/5247 cut-off events. [2024-06-20 16:06:00,212 INFO L125 PetriNetUnfolderBase]: For 1182622/1182622 co-relation queries the response was YES. [2024-06-20 16:06:00,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60557 conditions, 5247 events. 3342/5247 cut-off events. For 1182622/1182622 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30943 event pairs, 579 based on Foata normal form. 4/5244 useless extension candidates. Maximal degree in co-relation 60381. Up to 4740 conditions per place. [2024-06-20 16:06:00,296 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 500 selfloop transitions, 80 changer transitions 0/585 dead transitions. [2024-06-20 16:06:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 585 transitions, 8652 flow [2024-06-20 16:06:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:06:00,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:06:00,297 INFO L175 Difference]: Start difference. First operand has 373 places, 558 transitions, 6938 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:06:00,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 585 transitions, 8652 flow [2024-06-20 16:06:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 585 transitions, 8448 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:02,992 INFO L231 Difference]: Finished difference. Result has 377 places, 566 transitions, 7157 flow [2024-06-20 16:06:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6734, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7157, PETRI_PLACES=377, PETRI_TRANSITIONS=566} [2024-06-20 16:06:02,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-20 16:06:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 566 transitions, 7157 flow [2024-06-20 16:06:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:02,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:06:02,993 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:02,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1249998215, now seen corresponding path program 13 times [2024-06-20 16:06:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123723964] [2024-06-20 16:06:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:04,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:04,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123723964] [2024-06-20 16:06:04,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123723964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:04,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:04,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:04,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245109529] [2024-06-20 16:06:04,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:04,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:04,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:04,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:04,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 566 transitions, 7157 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:04,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:04,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:04,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:06,211 INFO L124 PetriNetUnfolderBase]: 3379/5321 cut-off events. [2024-06-20 16:06:06,211 INFO L125 PetriNetUnfolderBase]: For 1221080/1221083 co-relation queries the response was YES. [2024-06-20 16:06:06,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62516 conditions, 5321 events. 3379/5321 cut-off events. For 1221080/1221083 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31639 event pairs, 609 based on Foata normal form. 3/5316 useless extension candidates. Maximal degree in co-relation 62338. Up to 4508 conditions per place. [2024-06-20 16:06:06,305 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 439 selfloop transitions, 155 changer transitions 0/599 dead transitions. [2024-06-20 16:06:06,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 599 transitions, 9925 flow [2024-06-20 16:06:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:06:06,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:06:06,307 INFO L175 Difference]: Start difference. First operand has 377 places, 566 transitions, 7157 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:06:06,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 599 transitions, 9925 flow [2024-06-20 16:06:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 599 transitions, 9708 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:09,046 INFO L231 Difference]: Finished difference. Result has 382 places, 583 transitions, 8216 flow [2024-06-20 16:06:09,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8216, PETRI_PLACES=382, PETRI_TRANSITIONS=583} [2024-06-20 16:06:09,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-20 16:06:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 583 transitions, 8216 flow [2024-06-20 16:06:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:09,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:09,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:09,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:06:09,047 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:09,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -359905612, now seen corresponding path program 9 times [2024-06-20 16:06:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960356915] [2024-06-20 16:06:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:09,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:10,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:10,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960356915] [2024-06-20 16:06:10,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960356915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:10,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:10,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:10,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507782643] [2024-06-20 16:06:10,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:10,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:10,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:10,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:10,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:10,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 583 transitions, 8216 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:10,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:10,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:10,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:11,827 INFO L124 PetriNetUnfolderBase]: 3424/5368 cut-off events. [2024-06-20 16:06:11,827 INFO L125 PetriNetUnfolderBase]: For 1286601/1286604 co-relation queries the response was YES. [2024-06-20 16:06:11,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64791 conditions, 5368 events. 3424/5368 cut-off events. For 1286601/1286604 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31788 event pairs, 584 based on Foata normal form. 3/5363 useless extension candidates. Maximal degree in co-relation 64610. Up to 4365 conditions per place. [2024-06-20 16:06:11,917 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 450 selfloop transitions, 221 changer transitions 0/676 dead transitions. [2024-06-20 16:06:11,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 676 transitions, 11744 flow [2024-06-20 16:06:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:06:11,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:06:11,919 INFO L175 Difference]: Start difference. First operand has 382 places, 583 transitions, 8216 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:06:11,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 676 transitions, 11744 flow [2024-06-20 16:06:15,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 676 transitions, 11398 flow, removed 137 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:15,389 INFO L231 Difference]: Finished difference. Result has 390 places, 654 transitions, 9916 flow [2024-06-20 16:06:15,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9916, PETRI_PLACES=390, PETRI_TRANSITIONS=654} [2024-06-20 16:06:15,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 16:06:15,390 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 654 transitions, 9916 flow [2024-06-20 16:06:15,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:15,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:15,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:15,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:06:15,391 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:15,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:15,391 INFO L85 PathProgramCache]: Analyzing trace with hash 476535664, now seen corresponding path program 10 times [2024-06-20 16:06:15,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:15,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413410354] [2024-06-20 16:06:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:15,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413410354] [2024-06-20 16:06:16,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413410354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:16,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:16,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319797001] [2024-06-20 16:06:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:16,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:16,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 654 transitions, 9916 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:16,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:16,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:18,204 INFO L124 PetriNetUnfolderBase]: 3442/5413 cut-off events. [2024-06-20 16:06:18,204 INFO L125 PetriNetUnfolderBase]: For 1310023/1310026 co-relation queries the response was YES. [2024-06-20 16:06:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66489 conditions, 5413 events. 3442/5413 cut-off events. For 1310023/1310026 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32183 event pairs, 576 based on Foata normal form. 4/5413 useless extension candidates. Maximal degree in co-relation 66304. Up to 4885 conditions per place. [2024-06-20 16:06:18,294 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 576 selfloop transitions, 99 changer transitions 0/680 dead transitions. [2024-06-20 16:06:18,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 680 transitions, 12122 flow [2024-06-20 16:06:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 16:06:18,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-20 16:06:18,296 INFO L175 Difference]: Start difference. First operand has 390 places, 654 transitions, 9916 flow. Second operand 11 states and 192 transitions. [2024-06-20 16:06:18,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 680 transitions, 12122 flow [2024-06-20 16:06:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 680 transitions, 11954 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:21,870 INFO L231 Difference]: Finished difference. Result has 398 places, 662 transitions, 10226 flow [2024-06-20 16:06:21,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9762, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10226, PETRI_PLACES=398, PETRI_TRANSITIONS=662} [2024-06-20 16:06:21,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 16:06:21,871 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 662 transitions, 10226 flow [2024-06-20 16:06:21,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:21,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:21,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:21,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:06:21,871 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:21,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash -998765938, now seen corresponding path program 11 times [2024-06-20 16:06:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392064945] [2024-06-20 16:06:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:21,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:23,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:23,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392064945] [2024-06-20 16:06:23,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392064945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:23,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:23,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878975613] [2024-06-20 16:06:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:23,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:23,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:23,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:23,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 662 transitions, 10226 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:23,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:23,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:23,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:24,620 INFO L124 PetriNetUnfolderBase]: 3430/5398 cut-off events. [2024-06-20 16:06:24,620 INFO L125 PetriNetUnfolderBase]: For 1312997/1313000 co-relation queries the response was YES. [2024-06-20 16:06:24,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66046 conditions, 5398 events. 3430/5398 cut-off events. For 1312997/1313000 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32123 event pairs, 576 based on Foata normal form. 6/5400 useless extension candidates. Maximal degree in co-relation 65859. Up to 4877 conditions per place. [2024-06-20 16:06:24,711 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 576 selfloop transitions, 95 changer transitions 0/676 dead transitions. [2024-06-20 16:06:24,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 676 transitions, 11888 flow [2024-06-20 16:06:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:06:24,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:06:24,713 INFO L175 Difference]: Start difference. First operand has 398 places, 662 transitions, 10226 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:06:24,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 676 transitions, 11888 flow [2024-06-20 16:06:28,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 676 transitions, 11536 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:28,270 INFO L231 Difference]: Finished difference. Result has 400 places, 662 transitions, 10078 flow [2024-06-20 16:06:28,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9874, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10078, PETRI_PLACES=400, PETRI_TRANSITIONS=662} [2024-06-20 16:06:28,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-20 16:06:28,271 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 662 transitions, 10078 flow [2024-06-20 16:06:28,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:28,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:28,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:28,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:06:28,271 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:28,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:28,272 INFO L85 PathProgramCache]: Analyzing trace with hash -364547242, now seen corresponding path program 12 times [2024-06-20 16:06:28,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:28,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003703311] [2024-06-20 16:06:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:28,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:29,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:29,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003703311] [2024-06-20 16:06:29,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003703311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:29,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:29,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321605762] [2024-06-20 16:06:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:29,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:29,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:29,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 662 transitions, 10078 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:29,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:29,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:29,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:31,104 INFO L124 PetriNetUnfolderBase]: 3440/5395 cut-off events. [2024-06-20 16:06:31,104 INFO L125 PetriNetUnfolderBase]: For 1316422/1316425 co-relation queries the response was YES. [2024-06-20 16:06:31,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66150 conditions, 5395 events. 3440/5395 cut-off events. For 1316422/1316425 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31970 event pairs, 584 based on Foata normal form. 4/5391 useless extension candidates. Maximal degree in co-relation 65962. Up to 4384 conditions per place. [2024-06-20 16:06:31,197 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 477 selfloop transitions, 208 changer transitions 0/690 dead transitions. [2024-06-20 16:06:31,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 690 transitions, 12563 flow [2024-06-20 16:06:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:06:31,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:06:31,198 INFO L175 Difference]: Start difference. First operand has 400 places, 662 transitions, 10078 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:06:31,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 690 transitions, 12563 flow [2024-06-20 16:06:34,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 690 transitions, 12373 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:34,931 INFO L231 Difference]: Finished difference. Result has 401 places, 668 transitions, 10460 flow [2024-06-20 16:06:34,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9888, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10460, PETRI_PLACES=401, PETRI_TRANSITIONS=668} [2024-06-20 16:06:34,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-20 16:06:34,931 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 668 transitions, 10460 flow [2024-06-20 16:06:34,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:34,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:34,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:06:34,932 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:34,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash 128586386, now seen corresponding path program 13 times [2024-06-20 16:06:34,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314683534] [2024-06-20 16:06:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:36,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:36,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314683534] [2024-06-20 16:06:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314683534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:36,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749259044] [2024-06-20 16:06:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:36,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:36,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 668 transitions, 10460 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:36,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:36,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:36,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:37,589 INFO L124 PetriNetUnfolderBase]: 3464/5438 cut-off events. [2024-06-20 16:06:37,589 INFO L125 PetriNetUnfolderBase]: For 1369081/1369084 co-relation queries the response was YES. [2024-06-20 16:06:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67115 conditions, 5438 events. 3464/5438 cut-off events. For 1369081/1369084 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32295 event pairs, 604 based on Foata normal form. 10/5440 useless extension candidates. Maximal degree in co-relation 66926. Up to 4904 conditions per place. [2024-06-20 16:06:37,680 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 617 selfloop transitions, 68 changer transitions 0/690 dead transitions. [2024-06-20 16:06:37,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 690 transitions, 12113 flow [2024-06-20 16:06:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:06:37,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:06:37,681 INFO L175 Difference]: Start difference. First operand has 401 places, 668 transitions, 10460 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:06:37,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 690 transitions, 12113 flow [2024-06-20 16:06:41,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 690 transitions, 11818 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:41,188 INFO L231 Difference]: Finished difference. Result has 406 places, 675 transitions, 10539 flow [2024-06-20 16:06:41,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10539, PETRI_PLACES=406, PETRI_TRANSITIONS=675} [2024-06-20 16:06:41,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-20 16:06:41,189 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 675 transitions, 10539 flow [2024-06-20 16:06:41,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:41,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:41,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:41,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:06:41,189 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:41,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash -933996107, now seen corresponding path program 14 times [2024-06-20 16:06:41,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:41,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527063027] [2024-06-20 16:06:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:41,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:42,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:42,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527063027] [2024-06-20 16:06:42,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527063027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:42,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:42,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669188936] [2024-06-20 16:06:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:42,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:42,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 675 transitions, 10539 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:42,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:42,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:42,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:44,581 INFO L124 PetriNetUnfolderBase]: 3474/5454 cut-off events. [2024-06-20 16:06:44,581 INFO L125 PetriNetUnfolderBase]: For 1345158/1345161 co-relation queries the response was YES. [2024-06-20 16:06:44,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67126 conditions, 5454 events. 3474/5454 cut-off events. For 1345158/1345161 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32446 event pairs, 606 based on Foata normal form. 4/5450 useless extension candidates. Maximal degree in co-relation 66936. Up to 4936 conditions per place. [2024-06-20 16:06:44,678 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 624 selfloop transitions, 64 changer transitions 0/693 dead transitions. [2024-06-20 16:06:44,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 693 transitions, 12166 flow [2024-06-20 16:06:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:06:44,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:06:44,680 INFO L175 Difference]: Start difference. First operand has 406 places, 675 transitions, 10539 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:06:44,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 693 transitions, 12166 flow [2024-06-20 16:06:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 693 transitions, 11919 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:47,983 INFO L231 Difference]: Finished difference. Result has 408 places, 679 transitions, 10640 flow [2024-06-20 16:06:47,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10640, PETRI_PLACES=408, PETRI_TRANSITIONS=679} [2024-06-20 16:06:47,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 16:06:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 679 transitions, 10640 flow [2024-06-20 16:06:47,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:47,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:06:47,984 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1337820153, now seen corresponding path program 15 times [2024-06-20 16:06:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:47,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038523168] [2024-06-20 16:06:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038523168] [2024-06-20 16:06:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038523168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:49,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431100447] [2024-06-20 16:06:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:49,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:49,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 679 transitions, 10640 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:49,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:49,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:49,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:51,658 INFO L124 PetriNetUnfolderBase]: 3479/5463 cut-off events. [2024-06-20 16:06:51,658 INFO L125 PetriNetUnfolderBase]: For 1356884/1356887 co-relation queries the response was YES. [2024-06-20 16:06:51,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67143 conditions, 5463 events. 3479/5463 cut-off events. For 1356884/1356887 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32519 event pairs, 603 based on Foata normal form. 3/5458 useless extension candidates. Maximal degree in co-relation 66952. Up to 4895 conditions per place. [2024-06-20 16:06:51,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 601 selfloop transitions, 93 changer transitions 0/699 dead transitions. [2024-06-20 16:06:51,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 699 transitions, 12625 flow [2024-06-20 16:06:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:06:51,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:06:51,751 INFO L175 Difference]: Start difference. First operand has 408 places, 679 transitions, 10640 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:06:51,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 699 transitions, 12625 flow [2024-06-20 16:06:54,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 699 transitions, 12314 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:54,887 INFO L231 Difference]: Finished difference. Result has 411 places, 685 transitions, 10846 flow [2024-06-20 16:06:54,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10329, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10846, PETRI_PLACES=411, PETRI_TRANSITIONS=685} [2024-06-20 16:06:54,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 16:06:54,888 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 685 transitions, 10846 flow [2024-06-20 16:06:54,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:54,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:54,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:06:54,888 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:54,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -359892592, now seen corresponding path program 14 times [2024-06-20 16:06:54,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:54,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346488891] [2024-06-20 16:06:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:54,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:56,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:56,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346488891] [2024-06-20 16:06:56,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346488891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:56,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:56,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287615280] [2024-06-20 16:06:56,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:56,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:56,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:56,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:56,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 685 transitions, 10846 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:56,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:56,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:56,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:58,095 INFO L124 PetriNetUnfolderBase]: 3476/5460 cut-off events. [2024-06-20 16:06:58,096 INFO L125 PetriNetUnfolderBase]: For 1361898/1361901 co-relation queries the response was YES. [2024-06-20 16:06:58,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66981 conditions, 5460 events. 3476/5460 cut-off events. For 1361898/1361901 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32485 event pairs, 578 based on Foata normal form. 3/5459 useless extension candidates. Maximal degree in co-relation 66788. Up to 5099 conditions per place. [2024-06-20 16:06:58,190 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 641 selfloop transitions, 51 changer transitions 0/697 dead transitions. [2024-06-20 16:06:58,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 697 transitions, 12276 flow [2024-06-20 16:06:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:06:58,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:06:58,191 INFO L175 Difference]: Start difference. First operand has 411 places, 685 transitions, 10846 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:06:58,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 697 transitions, 12276 flow [2024-06-20 16:07:02,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 697 transitions, 11896 flow, removed 141 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:02,048 INFO L231 Difference]: Finished difference. Result has 415 places, 686 transitions, 10596 flow [2024-06-20 16:07:02,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10596, PETRI_PLACES=415, PETRI_TRANSITIONS=686} [2024-06-20 16:07:02,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-20 16:07:02,049 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 686 transitions, 10596 flow [2024-06-20 16:07:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:02,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:02,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:07:02,049 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:02,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1324696210, now seen corresponding path program 15 times [2024-06-20 16:07:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:02,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813467358] [2024-06-20 16:07:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:03,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:03,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813467358] [2024-06-20 16:07:03,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813467358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:03,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958997869] [2024-06-20 16:07:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:03,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:03,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:03,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:03,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 686 transitions, 10596 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:03,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:03,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:03,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:04,890 INFO L124 PetriNetUnfolderBase]: 3468/5453 cut-off events. [2024-06-20 16:07:04,890 INFO L125 PetriNetUnfolderBase]: For 1369089/1369092 co-relation queries the response was YES. [2024-06-20 16:07:04,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66488 conditions, 5453 events. 3468/5453 cut-off events. For 1369089/1369092 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32511 event pairs, 598 based on Foata normal form. 4/5449 useless extension candidates. Maximal degree in co-relation 66293. Up to 4934 conditions per place. [2024-06-20 16:07:04,980 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 631 selfloop transitions, 66 changer transitions 0/702 dead transitions. [2024-06-20 16:07:04,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 702 transitions, 12104 flow [2024-06-20 16:07:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:07:04,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:07:04,981 INFO L175 Difference]: Start difference. First operand has 415 places, 686 transitions, 10596 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:07:04,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 702 transitions, 12104 flow [2024-06-20 16:07:08,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 702 transitions, 11988 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:08,396 INFO L231 Difference]: Finished difference. Result has 417 places, 688 transitions, 10691 flow [2024-06-20 16:07:08,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10691, PETRI_PLACES=417, PETRI_TRANSITIONS=688} [2024-06-20 16:07:08,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-20 16:07:08,397 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 688 transitions, 10691 flow [2024-06-20 16:07:08,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:08,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:08,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:07:08,397 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:08,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash 474538927, now seen corresponding path program 16 times [2024-06-20 16:07:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:08,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488669582] [2024-06-20 16:07:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:08,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:09,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488669582] [2024-06-20 16:07:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488669582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:09,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:09,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128971470] [2024-06-20 16:07:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:09,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:09,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:09,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 688 transitions, 10691 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:09,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:09,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:09,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:11,418 INFO L124 PetriNetUnfolderBase]: 3465/5445 cut-off events. [2024-06-20 16:07:11,418 INFO L125 PetriNetUnfolderBase]: For 1372433/1372436 co-relation queries the response was YES. [2024-06-20 16:07:11,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66595 conditions, 5445 events. 3465/5445 cut-off events. For 1372433/1372436 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32418 event pairs, 598 based on Foata normal form. 3/5440 useless extension candidates. Maximal degree in co-relation 66399. Up to 4624 conditions per place. [2024-06-20 16:07:11,519 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 532 selfloop transitions, 165 changer transitions 0/702 dead transitions. [2024-06-20 16:07:11,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 702 transitions, 12643 flow [2024-06-20 16:07:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:11,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:07:11,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:07:11,521 INFO L175 Difference]: Start difference. First operand has 417 places, 688 transitions, 10691 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:07:11,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 702 transitions, 12643 flow [2024-06-20 16:07:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 702 transitions, 12288 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:15,183 INFO L231 Difference]: Finished difference. Result has 419 places, 688 transitions, 10672 flow [2024-06-20 16:07:15,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10336, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10672, PETRI_PLACES=419, PETRI_TRANSITIONS=688} [2024-06-20 16:07:15,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-20 16:07:15,184 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 688 transitions, 10672 flow [2024-06-20 16:07:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:15,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:15,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:07:15,185 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:15,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -926377330, now seen corresponding path program 16 times [2024-06-20 16:07:15,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:15,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555525228] [2024-06-20 16:07:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555525228] [2024-06-20 16:07:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555525228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:16,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417155090] [2024-06-20 16:07:16,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:16,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:16,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:16,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 688 transitions, 10672 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:16,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:16,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:16,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:17,885 INFO L124 PetriNetUnfolderBase]: 3487/5473 cut-off events. [2024-06-20 16:07:17,885 INFO L125 PetriNetUnfolderBase]: For 1415189/1415192 co-relation queries the response was YES. [2024-06-20 16:07:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67193 conditions, 5473 events. 3487/5473 cut-off events. For 1415189/1415192 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32502 event pairs, 599 based on Foata normal form. 6/5471 useless extension candidates. Maximal degree in co-relation 66996. Up to 4726 conditions per place. [2024-06-20 16:07:17,979 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 582 selfloop transitions, 127 changer transitions 0/714 dead transitions. [2024-06-20 16:07:17,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 714 transitions, 12774 flow [2024-06-20 16:07:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:07:17,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:07:17,980 INFO L175 Difference]: Start difference. First operand has 419 places, 688 transitions, 10672 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:07:17,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 714 transitions, 12774 flow [2024-06-20 16:07:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 714 transitions, 12424 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:21,799 INFO L231 Difference]: Finished difference. Result has 422 places, 696 transitions, 10953 flow [2024-06-20 16:07:21,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10322, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10953, PETRI_PLACES=422, PETRI_TRANSITIONS=696} [2024-06-20 16:07:21,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 16:07:21,800 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 696 transitions, 10953 flow [2024-06-20 16:07:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:21,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:21,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:21,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:07:21,800 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:21,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1426862608, now seen corresponding path program 17 times [2024-06-20 16:07:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:21,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349083346] [2024-06-20 16:07:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:21,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349083346] [2024-06-20 16:07:23,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349083346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:23,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939106498] [2024-06-20 16:07:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:23,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:23,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:23,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:23,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 696 transitions, 10953 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:23,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:23,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:23,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:24,751 INFO L124 PetriNetUnfolderBase]: 3481/5460 cut-off events. [2024-06-20 16:07:24,751 INFO L125 PetriNetUnfolderBase]: For 1401573/1401576 co-relation queries the response was YES. [2024-06-20 16:07:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67105 conditions, 5460 events. 3481/5460 cut-off events. For 1401573/1401576 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32487 event pairs, 584 based on Foata normal form. 4/5456 useless extension candidates. Maximal degree in co-relation 66906. Up to 4444 conditions per place. [2024-06-20 16:07:24,846 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 501 selfloop transitions, 214 changer transitions 0/720 dead transitions. [2024-06-20 16:07:24,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 720 transitions, 13409 flow [2024-06-20 16:07:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:07:24,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 16:07:24,848 INFO L175 Difference]: Start difference. First operand has 422 places, 696 transitions, 10953 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:07:24,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 720 transitions, 13409 flow [2024-06-20 16:07:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 720 transitions, 13007 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:28,593 INFO L231 Difference]: Finished difference. Result has 425 places, 698 transitions, 11030 flow [2024-06-20 16:07:28,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10565, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11030, PETRI_PLACES=425, PETRI_TRANSITIONS=698} [2024-06-20 16:07:28,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-20 16:07:28,594 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 698 transitions, 11030 flow [2024-06-20 16:07:28,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:28,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:28,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:28,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:07:28,595 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:28,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 262113717, now seen corresponding path program 17 times [2024-06-20 16:07:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:28,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177406628] [2024-06-20 16:07:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:30,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177406628] [2024-06-20 16:07:30,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177406628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:30,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:30,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667510675] [2024-06-20 16:07:30,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:30,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:30,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:30,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:30,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:30,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 698 transitions, 11030 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:30,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:30,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:30,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:31,720 INFO L124 PetriNetUnfolderBase]: 3486/5478 cut-off events. [2024-06-20 16:07:31,720 INFO L125 PetriNetUnfolderBase]: For 1413616/1413619 co-relation queries the response was YES. [2024-06-20 16:07:31,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67493 conditions, 5478 events. 3486/5478 cut-off events. For 1413616/1413619 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32647 event pairs, 601 based on Foata normal form. 3/5473 useless extension candidates. Maximal degree in co-relation 67293. Up to 4963 conditions per place. [2024-06-20 16:07:31,819 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 645 selfloop transitions, 65 changer transitions 0/715 dead transitions. [2024-06-20 16:07:31,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 715 transitions, 12655 flow [2024-06-20 16:07:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:07:31,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:07:31,820 INFO L175 Difference]: Start difference. First operand has 425 places, 698 transitions, 11030 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:07:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 715 transitions, 12655 flow [2024-06-20 16:07:35,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 715 transitions, 12291 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:35,737 INFO L231 Difference]: Finished difference. Result has 429 places, 701 transitions, 10967 flow [2024-06-20 16:07:35,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10666, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10967, PETRI_PLACES=429, PETRI_TRANSITIONS=701} [2024-06-20 16:07:35,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-20 16:07:35,738 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 701 transitions, 10967 flow [2024-06-20 16:07:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:35,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:35,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:35,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:07:35,738 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:35,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -926644457, now seen corresponding path program 18 times [2024-06-20 16:07:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:35,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778207111] [2024-06-20 16:07:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778207111] [2024-06-20 16:07:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778207111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:37,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800830536] [2024-06-20 16:07:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:37,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:37,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 701 transitions, 10967 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:37,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:37,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:37,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:39,066 INFO L124 PetriNetUnfolderBase]: 3504/5511 cut-off events. [2024-06-20 16:07:39,066 INFO L125 PetriNetUnfolderBase]: For 1453395/1453398 co-relation queries the response was YES. [2024-06-20 16:07:39,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67784 conditions, 5511 events. 3504/5511 cut-off events. For 1453395/1453398 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32906 event pairs, 599 based on Foata normal form. 4/5507 useless extension candidates. Maximal degree in co-relation 67583. Up to 4902 conditions per place. [2024-06-20 16:07:39,155 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 630 selfloop transitions, 87 changer transitions 0/722 dead transitions. [2024-06-20 16:07:39,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 722 transitions, 13035 flow [2024-06-20 16:07:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:07:39,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:07:39,156 INFO L175 Difference]: Start difference. First operand has 429 places, 701 transitions, 10967 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:07:39,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 722 transitions, 13035 flow [2024-06-20 16:07:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 722 transitions, 12771 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:42,807 INFO L231 Difference]: Finished difference. Result has 432 places, 708 transitions, 11256 flow [2024-06-20 16:07:42,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10703, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11256, PETRI_PLACES=432, PETRI_TRANSITIONS=708} [2024-06-20 16:07:42,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 16:07:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 708 transitions, 11256 flow [2024-06-20 16:07:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:42,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:42,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:42,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:07:42,808 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:42,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash -193845029, now seen corresponding path program 19 times [2024-06-20 16:07:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:42,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673658868] [2024-06-20 16:07:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:42,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673658868] [2024-06-20 16:07:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673658868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:44,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:44,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:44,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61187397] [2024-06-20 16:07:44,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:44,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:44,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:44,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:44,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 708 transitions, 11256 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:44,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:44,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:44,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:46,169 INFO L124 PetriNetUnfolderBase]: 3498/5503 cut-off events. [2024-06-20 16:07:46,170 INFO L125 PetriNetUnfolderBase]: For 1452180/1452183 co-relation queries the response was YES. [2024-06-20 16:07:46,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67583 conditions, 5503 events. 3498/5503 cut-off events. For 1452180/1452183 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32875 event pairs, 601 based on Foata normal form. 4/5499 useless extension candidates. Maximal degree in co-relation 67380. Up to 4665 conditions per place. [2024-06-20 16:07:46,271 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 556 selfloop transitions, 163 changer transitions 0/724 dead transitions. [2024-06-20 16:07:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 724 transitions, 13364 flow [2024-06-20 16:07:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:07:46,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:07:46,272 INFO L175 Difference]: Start difference. First operand has 432 places, 708 transitions, 11256 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:07:46,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 724 transitions, 13364 flow [2024-06-20 16:07:50,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 724 transitions, 12889 flow, removed 170 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:50,826 INFO L231 Difference]: Finished difference. Result has 435 places, 710 transitions, 11206 flow [2024-06-20 16:07:50,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10815, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11206, PETRI_PLACES=435, PETRI_TRANSITIONS=710} [2024-06-20 16:07:50,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-20 16:07:50,827 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 710 transitions, 11206 flow [2024-06-20 16:07:50,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:50,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:50,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:50,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:07:50,828 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 135938036, now seen corresponding path program 18 times [2024-06-20 16:07:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103394402] [2024-06-20 16:07:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:50,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103394402] [2024-06-20 16:07:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103394402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830008924] [2024-06-20 16:07:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:51,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:51,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 710 transitions, 11206 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:51,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:51,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:51,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:53,584 INFO L124 PetriNetUnfolderBase]: 3500/5500 cut-off events. [2024-06-20 16:07:53,584 INFO L125 PetriNetUnfolderBase]: For 1465572/1465575 co-relation queries the response was YES. [2024-06-20 16:07:53,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67299 conditions, 5500 events. 3500/5500 cut-off events. For 1465572/1465575 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32812 event pairs, 600 based on Foata normal form. 6/5498 useless extension candidates. Maximal degree in co-relation 67095. Up to 4747 conditions per place. [2024-06-20 16:07:53,684 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 130 changer transitions 0/732 dead transitions. [2024-06-20 16:07:53,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 732 transitions, 13180 flow [2024-06-20 16:07:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:07:53,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:07:53,685 INFO L175 Difference]: Start difference. First operand has 435 places, 710 transitions, 11206 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:07:53,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 732 transitions, 13180 flow [2024-06-20 16:07:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 732 transitions, 12736 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:58,354 INFO L231 Difference]: Finished difference. Result has 438 places, 714 transitions, 11195 flow [2024-06-20 16:07:58,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10798, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11195, PETRI_PLACES=438, PETRI_TRANSITIONS=714} [2024-06-20 16:07:58,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 16:07:58,358 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 714 transitions, 11195 flow [2024-06-20 16:07:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:58,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:58,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:07:58,359 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:07:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1337583220, now seen corresponding path program 19 times [2024-06-20 16:07:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692799255] [2024-06-20 16:07:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692799255] [2024-06-20 16:07:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692799255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:59,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:59,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783166526] [2024-06-20 16:07:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:59,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:59,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:59,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 714 transitions, 11195 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:59,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:59,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:59,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:01,286 INFO L124 PetriNetUnfolderBase]: 3498/5496 cut-off events. [2024-06-20 16:08:01,286 INFO L125 PetriNetUnfolderBase]: For 1465212/1465215 co-relation queries the response was YES. [2024-06-20 16:08:01,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66551 conditions, 5496 events. 3498/5496 cut-off events. For 1465212/1465215 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32769 event pairs, 596 based on Foata normal form. 6/5494 useless extension candidates. Maximal degree in co-relation 66347. Up to 4835 conditions per place. [2024-06-20 16:08:01,384 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 117 changer transitions 0/741 dead transitions. [2024-06-20 16:08:01,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 741 transitions, 13614 flow [2024-06-20 16:08:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:08:01,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:08:01,385 INFO L175 Difference]: Start difference. First operand has 438 places, 714 transitions, 11195 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:08:01,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 741 transitions, 13614 flow [2024-06-20 16:08:06,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 741 transitions, 13159 flow, removed 135 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:06,178 INFO L231 Difference]: Finished difference. Result has 443 places, 723 transitions, 11367 flow [2024-06-20 16:08:06,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10757, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11367, PETRI_PLACES=443, PETRI_TRANSITIONS=723} [2024-06-20 16:08:06,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 16:08:06,179 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 723 transitions, 11367 flow [2024-06-20 16:08:06,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:06,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:06,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:08:06,179 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:06,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1337583003, now seen corresponding path program 20 times [2024-06-20 16:08:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:06,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534750441] [2024-06-20 16:08:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:06,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534750441] [2024-06-20 16:08:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534750441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:07,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396437558] [2024-06-20 16:08:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 723 transitions, 11367 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:09,455 INFO L124 PetriNetUnfolderBase]: 3495/5492 cut-off events. [2024-06-20 16:08:09,456 INFO L125 PetriNetUnfolderBase]: For 1445175/1445178 co-relation queries the response was YES. [2024-06-20 16:08:09,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66316 conditions, 5492 events. 3495/5492 cut-off events. For 1445175/1445178 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 32759 event pairs, 598 based on Foata normal form. 3/5487 useless extension candidates. Maximal degree in co-relation 66109. Up to 4919 conditions per place. [2024-06-20 16:08:09,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 637 selfloop transitions, 94 changer transitions 0/736 dead transitions. [2024-06-20 16:08:09,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 736 transitions, 12867 flow [2024-06-20 16:08:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:08:09,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:08:09,559 INFO L175 Difference]: Start difference. First operand has 443 places, 723 transitions, 11367 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:08:09,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 736 transitions, 12867 flow [2024-06-20 16:08:14,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 736 transitions, 12373 flow, removed 165 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:14,914 INFO L231 Difference]: Finished difference. Result has 447 places, 723 transitions, 11067 flow [2024-06-20 16:08:14,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10873, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11067, PETRI_PLACES=447, PETRI_TRANSITIONS=723} [2024-06-20 16:08:14,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-20 16:08:14,915 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 723 transitions, 11067 flow [2024-06-20 16:08:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:14,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:14,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:08:14,915 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:14,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 275013964, now seen corresponding path program 20 times [2024-06-20 16:08:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323353931] [2024-06-20 16:08:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323353931] [2024-06-20 16:08:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323353931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:15,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797148063] [2024-06-20 16:08:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:15,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:16,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:16,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 723 transitions, 11067 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:16,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:16,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:16,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:17,809 INFO L124 PetriNetUnfolderBase]: 3479/5469 cut-off events. [2024-06-20 16:08:17,810 INFO L125 PetriNetUnfolderBase]: For 1447478/1447481 co-relation queries the response was YES. [2024-06-20 16:08:17,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65018 conditions, 5469 events. 3479/5469 cut-off events. For 1447478/1447481 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 32609 event pairs, 568 based on Foata normal form. 6/5471 useless extension candidates. Maximal degree in co-relation 64810. Up to 5113 conditions per place. [2024-06-20 16:08:17,902 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 692 selfloop transitions, 38 changer transitions 0/735 dead transitions. [2024-06-20 16:08:17,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 735 transitions, 12576 flow [2024-06-20 16:08:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:08:17,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:08:17,903 INFO L175 Difference]: Start difference. First operand has 447 places, 723 transitions, 11067 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:08:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 735 transitions, 12576 flow [2024-06-20 16:08:23,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 735 transitions, 12249 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:23,098 INFO L231 Difference]: Finished difference. Result has 450 places, 723 transitions, 10838 flow [2024-06-20 16:08:23,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10752, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10838, PETRI_PLACES=450, PETRI_TRANSITIONS=723} [2024-06-20 16:08:23,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 16:08:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 723 transitions, 10838 flow [2024-06-20 16:08:23,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:23,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:23,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:23,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:08:23,099 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 838739793, now seen corresponding path program 7 times [2024-06-20 16:08:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980737864] [2024-06-20 16:08:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:24,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:24,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980737864] [2024-06-20 16:08:24,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980737864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:24,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:24,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913022914] [2024-06-20 16:08:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:24,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 723 transitions, 10838 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:24,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:24,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:26,119 INFO L124 PetriNetUnfolderBase]: 3523/5538 cut-off events. [2024-06-20 16:08:26,119 INFO L125 PetriNetUnfolderBase]: For 1551391/1551394 co-relation queries the response was YES. [2024-06-20 16:08:26,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65771 conditions, 5538 events. 3523/5538 cut-off events. For 1551391/1551394 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 33110 event pairs, 600 based on Foata normal form. 14/5544 useless extension candidates. Maximal degree in co-relation 65562. Up to 4978 conditions per place. [2024-06-20 16:08:26,219 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 674 selfloop transitions, 65 changer transitions 0/744 dead transitions. [2024-06-20 16:08:26,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 744 transitions, 12648 flow [2024-06-20 16:08:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:08:26,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:08:26,221 INFO L175 Difference]: Start difference. First operand has 450 places, 723 transitions, 10838 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:08:26,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 744 transitions, 12648 flow [2024-06-20 16:08:31,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 744 transitions, 12512 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 16:08:31,638 INFO L231 Difference]: Finished difference. Result has 451 places, 726 transitions, 11029 flow [2024-06-20 16:08:31,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10702, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11029, PETRI_PLACES=451, PETRI_TRANSITIONS=726} [2024-06-20 16:08:31,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 16:08:31,639 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 726 transitions, 11029 flow [2024-06-20 16:08:31,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:31,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:31,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:31,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:08:31,640 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:31,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 135814687, now seen corresponding path program 8 times [2024-06-20 16:08:31,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:31,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010571572] [2024-06-20 16:08:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010571572] [2024-06-20 16:08:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010571572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:32,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168562231] [2024-06-20 16:08:32,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:32,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:32,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 726 transitions, 11029 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:32,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:32,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:32,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:34,558 INFO L124 PetriNetUnfolderBase]: 3567/5604 cut-off events. [2024-06-20 16:08:34,558 INFO L125 PetriNetUnfolderBase]: For 1586464/1586467 co-relation queries the response was YES. [2024-06-20 16:08:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67348 conditions, 5604 events. 3567/5604 cut-off events. For 1586464/1586467 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 33505 event pairs, 604 based on Foata normal form. 14/5610 useless extension candidates. Maximal degree in co-relation 67138. Up to 4992 conditions per place. [2024-06-20 16:08:34,659 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 658 selfloop transitions, 83 changer transitions 0/746 dead transitions. [2024-06-20 16:08:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 746 transitions, 12841 flow [2024-06-20 16:08:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:08:34,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:08:34,660 INFO L175 Difference]: Start difference. First operand has 451 places, 726 transitions, 11029 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:08:34,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 746 transitions, 12841 flow [2024-06-20 16:08:39,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 746 transitions, 12584 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:39,743 INFO L231 Difference]: Finished difference. Result has 453 places, 729 transitions, 11141 flow [2024-06-20 16:08:39,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10772, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11141, PETRI_PLACES=453, PETRI_TRANSITIONS=729} [2024-06-20 16:08:39,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 16:08:39,744 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 729 transitions, 11141 flow [2024-06-20 16:08:39,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:39,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:39,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:08:39,744 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:39,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1427252867, now seen corresponding path program 9 times [2024-06-20 16:08:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854467124] [2024-06-20 16:08:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:41,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:41,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854467124] [2024-06-20 16:08:41,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854467124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:41,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:41,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:41,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6004407] [2024-06-20 16:08:41,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:41,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:41,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:41,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:41,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 729 transitions, 11141 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:41,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:41,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:41,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:42,808 INFO L124 PetriNetUnfolderBase]: 3611/5672 cut-off events. [2024-06-20 16:08:42,808 INFO L125 PetriNetUnfolderBase]: For 1611870/1611873 co-relation queries the response was YES. [2024-06-20 16:08:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68488 conditions, 5672 events. 3611/5672 cut-off events. For 1611870/1611873 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33963 event pairs, 610 based on Foata normal form. 14/5678 useless extension candidates. Maximal degree in co-relation 68277. Up to 4921 conditions per place. [2024-06-20 16:08:42,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 609 selfloop transitions, 134 changer transitions 0/748 dead transitions. [2024-06-20 16:08:42,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 748 transitions, 12955 flow [2024-06-20 16:08:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:08:42,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:08:42,913 INFO L175 Difference]: Start difference. First operand has 453 places, 729 transitions, 11141 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:08:42,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 748 transitions, 12955 flow [2024-06-20 16:08:48,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 748 transitions, 12656 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:48,435 INFO L231 Difference]: Finished difference. Result has 455 places, 732 transitions, 11319 flow [2024-06-20 16:08:48,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10842, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11319, PETRI_PLACES=455, PETRI_TRANSITIONS=732} [2024-06-20 16:08:48,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 16:08:48,436 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 732 transitions, 11319 flow [2024-06-20 16:08:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:48,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:48,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:48,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:08:48,436 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:48,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash -937818779, now seen corresponding path program 10 times [2024-06-20 16:08:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:48,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781351672] [2024-06-20 16:08:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:48,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:49,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:49,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781351672] [2024-06-20 16:08:49,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781351672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:49,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:49,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:08:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622114354] [2024-06-20 16:08:49,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:49,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:08:49,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:08:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:08:49,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:49,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 732 transitions, 11319 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:49,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:49,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:49,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:51,329 INFO L124 PetriNetUnfolderBase]: 3642/5721 cut-off events. [2024-06-20 16:08:51,329 INFO L125 PetriNetUnfolderBase]: For 1610072/1610075 co-relation queries the response was YES. [2024-06-20 16:08:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68960 conditions, 5721 events. 3642/5721 cut-off events. For 1610072/1610075 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34372 event pairs, 605 based on Foata normal form. 14/5727 useless extension candidates. Maximal degree in co-relation 68748. Up to 5108 conditions per place. [2024-06-20 16:08:51,433 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 691 selfloop transitions, 62 changer transitions 0/758 dead transitions. [2024-06-20 16:08:51,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 758 transitions, 13323 flow [2024-06-20 16:08:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:08:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:08:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:08:51,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:08:51,435 INFO L175 Difference]: Start difference. First operand has 455 places, 732 transitions, 11319 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:08:51,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 758 transitions, 13323 flow [2024-06-20 16:08:56,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 758 transitions, 12916 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:56,697 INFO L231 Difference]: Finished difference. Result has 457 places, 735 transitions, 11250 flow [2024-06-20 16:08:56,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10912, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11250, PETRI_PLACES=457, PETRI_TRANSITIONS=735} [2024-06-20 16:08:56,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-20 16:08:56,698 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 735 transitions, 11250 flow [2024-06-20 16:08:56,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:08:56,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:56,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:56,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:08:56,698 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:08:56,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 849864732, now seen corresponding path program 2 times [2024-06-20 16:08:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:56,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628972176] [2024-06-20 16:08:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:58,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:58,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628972176] [2024-06-20 16:08:58,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628972176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:58,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:58,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:08:58,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145379854] [2024-06-20 16:08:58,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:58,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:08:58,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:08:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:08:58,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:08:58,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 735 transitions, 11250 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:08:58,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:58,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:08:58,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:00,126 INFO L124 PetriNetUnfolderBase]: 3650/5732 cut-off events. [2024-06-20 16:09:00,126 INFO L125 PetriNetUnfolderBase]: For 1532809/1532815 co-relation queries the response was YES. [2024-06-20 16:09:00,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68905 conditions, 5732 events. 3650/5732 cut-off events. For 1532809/1532815 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34361 event pairs, 601 based on Foata normal form. 6/5734 useless extension candidates. Maximal degree in co-relation 68692. Up to 5397 conditions per place. [2024-06-20 16:09:00,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 720 selfloop transitions, 26 changer transitions 0/751 dead transitions. [2024-06-20 16:09:00,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 751 transitions, 12959 flow [2024-06-20 16:09:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:09:00,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-20 16:09:00,229 INFO L175 Difference]: Start difference. First operand has 457 places, 735 transitions, 11250 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:09:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 751 transitions, 12959 flow [2024-06-20 16:09:05,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 751 transitions, 12689 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:05,784 INFO L231 Difference]: Finished difference. Result has 459 places, 737 transitions, 11215 flow [2024-06-20 16:09:05,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11215, PETRI_PLACES=459, PETRI_TRANSITIONS=737} [2024-06-20 16:09:05,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 16:09:05,785 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 737 transitions, 11215 flow [2024-06-20 16:09:05,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:05,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:05,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 16:09:05,786 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:05,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -984023888, now seen corresponding path program 3 times [2024-06-20 16:09:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147403920] [2024-06-20 16:09:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:07,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147403920] [2024-06-20 16:09:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147403920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:07,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:07,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:07,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860059710] [2024-06-20 16:09:07,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:07,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:07,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:07,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:07,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 737 transitions, 11215 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:07,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:07,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:07,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:09,300 INFO L124 PetriNetUnfolderBase]: 3658/5745 cut-off events. [2024-06-20 16:09:09,300 INFO L125 PetriNetUnfolderBase]: For 1549402/1549402 co-relation queries the response was YES. [2024-06-20 16:09:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68770 conditions, 5745 events. 3658/5745 cut-off events. For 1549402/1549402 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34505 event pairs, 597 based on Foata normal form. 2/5744 useless extension candidates. Maximal degree in co-relation 68556. Up to 5421 conditions per place. [2024-06-20 16:09:09,409 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 719 selfloop transitions, 29 changer transitions 0/753 dead transitions. [2024-06-20 16:09:09,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 753 transitions, 12921 flow [2024-06-20 16:09:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-20 16:09:09,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-20 16:09:09,410 INFO L175 Difference]: Start difference. First operand has 459 places, 737 transitions, 11215 flow. Second operand 11 states and 175 transitions. [2024-06-20 16:09:09,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 753 transitions, 12921 flow [2024-06-20 16:09:16,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 753 transitions, 12702 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:16,066 INFO L231 Difference]: Finished difference. Result has 463 places, 739 transitions, 11241 flow [2024-06-20 16:09:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10996, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11241, PETRI_PLACES=463, PETRI_TRANSITIONS=739} [2024-06-20 16:09:16,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-20 16:09:16,067 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 739 transitions, 11241 flow [2024-06-20 16:09:16,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:16,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:16,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 16:09:16,067 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:16,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -937480445, now seen corresponding path program 2 times [2024-06-20 16:09:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304294366] [2024-06-20 16:09:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:17,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:17,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304294366] [2024-06-20 16:09:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304294366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:17,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921628283] [2024-06-20 16:09:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:17,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:17,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:17,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 739 transitions, 11241 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:17,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:17,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:19,595 INFO L124 PetriNetUnfolderBase]: 3647/5730 cut-off events. [2024-06-20 16:09:19,596 INFO L125 PetriNetUnfolderBase]: For 1541870/1541873 co-relation queries the response was YES. [2024-06-20 16:09:19,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68031 conditions, 5730 events. 3647/5730 cut-off events. For 1541870/1541873 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34437 event pairs, 627 based on Foata normal form. 5/5727 useless extension candidates. Maximal degree in co-relation 67816. Up to 5198 conditions per place. [2024-06-20 16:09:19,705 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 677 selfloop transitions, 72 changer transitions 0/754 dead transitions. [2024-06-20 16:09:19,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 754 transitions, 12787 flow [2024-06-20 16:09:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:09:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:09:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-20 16:09:19,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-20 16:09:19,706 INFO L175 Difference]: Start difference. First operand has 463 places, 739 transitions, 11241 flow. Second operand 10 states and 178 transitions. [2024-06-20 16:09:19,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 754 transitions, 12787 flow [2024-06-20 16:09:25,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 754 transitions, 12558 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:25,895 INFO L231 Difference]: Finished difference. Result has 464 places, 739 transitions, 11164 flow [2024-06-20 16:09:25,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11164, PETRI_PLACES=464, PETRI_TRANSITIONS=739} [2024-06-20 16:09:25,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 16:09:25,896 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 739 transitions, 11164 flow [2024-06-20 16:09:25,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:25,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:25,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 16:09:25,896 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:25,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 63826258, now seen corresponding path program 4 times [2024-06-20 16:09:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:25,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836888661] [2024-06-20 16:09:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:27,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:27,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836888661] [2024-06-20 16:09:27,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836888661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:27,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:27,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:27,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47398135] [2024-06-20 16:09:27,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:27,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:27,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:27,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:27,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:27,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 739 transitions, 11164 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:27,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:27,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:27,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:29,569 INFO L124 PetriNetUnfolderBase]: 3655/5742 cut-off events. [2024-06-20 16:09:29,569 INFO L125 PetriNetUnfolderBase]: For 1549957/1549957 co-relation queries the response was YES. [2024-06-20 16:09:29,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68411 conditions, 5742 events. 3655/5742 cut-off events. For 1549957/1549957 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34453 event pairs, 597 based on Foata normal form. 2/5741 useless extension candidates. Maximal degree in co-relation 68195. Up to 5424 conditions per place. [2024-06-20 16:09:29,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 726 selfloop transitions, 23 changer transitions 0/754 dead transitions. [2024-06-20 16:09:29,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 754 transitions, 12874 flow [2024-06-20 16:09:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:09:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:09:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:09:29,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:09:29,678 INFO L175 Difference]: Start difference. First operand has 464 places, 739 transitions, 11164 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:09:29,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 754 transitions, 12874 flow [2024-06-20 16:09:36,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 754 transitions, 12510 flow, removed 88 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:36,018 INFO L231 Difference]: Finished difference. Result has 465 places, 741 transitions, 11037 flow [2024-06-20 16:09:36,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10800, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11037, PETRI_PLACES=465, PETRI_TRANSITIONS=741} [2024-06-20 16:09:36,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-20 16:09:36,019 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 741 transitions, 11037 flow [2024-06-20 16:09:36,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:36,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:36,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:36,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 16:09:36,020 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:36,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:36,020 INFO L85 PathProgramCache]: Analyzing trace with hash -983518898, now seen corresponding path program 5 times [2024-06-20 16:09:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:36,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918162274] [2024-06-20 16:09:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918162274] [2024-06-20 16:09:37,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918162274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:37,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:37,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097104643] [2024-06-20 16:09:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:37,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:37,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:37,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:37,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 741 transitions, 11037 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:37,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:37,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:37,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:39,608 INFO L124 PetriNetUnfolderBase]: 3663/5752 cut-off events. [2024-06-20 16:09:39,609 INFO L125 PetriNetUnfolderBase]: For 1575719/1575719 co-relation queries the response was YES. [2024-06-20 16:09:39,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68400 conditions, 5752 events. 3663/5752 cut-off events. For 1575719/1575719 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34518 event pairs, 595 based on Foata normal form. 2/5751 useless extension candidates. Maximal degree in co-relation 68184. Up to 5410 conditions per place. [2024-06-20 16:09:39,719 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 719 selfloop transitions, 34 changer transitions 0/758 dead transitions. [2024-06-20 16:09:39,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 758 transitions, 12763 flow [2024-06-20 16:09:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:09:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:09:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-20 16:09:39,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:09:39,720 INFO L175 Difference]: Start difference. First operand has 465 places, 741 transitions, 11037 flow. Second operand 11 states and 176 transitions. [2024-06-20 16:09:39,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 758 transitions, 12763 flow [2024-06-20 16:09:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 758 transitions, 12542 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:46,186 INFO L231 Difference]: Finished difference. Result has 468 places, 743 transitions, 11079 flow [2024-06-20 16:09:46,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10816, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11079, PETRI_PLACES=468, PETRI_TRANSITIONS=743} [2024-06-20 16:09:46,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-20 16:09:46,187 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 743 transitions, 11079 flow [2024-06-20 16:09:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:46,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 16:09:46,188 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:46,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1426852688, now seen corresponding path program 6 times [2024-06-20 16:09:46,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:46,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796940483] [2024-06-20 16:09:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:46,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796940483] [2024-06-20 16:09:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796940483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:47,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:47,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:09:47,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611349342] [2024-06-20 16:09:47,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:09:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:09:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:09:47,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:47,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 743 transitions, 11079 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:47,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:47,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:47,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:49,692 INFO L124 PetriNetUnfolderBase]: 3658/5747 cut-off events. [2024-06-20 16:09:49,692 INFO L125 PetriNetUnfolderBase]: For 1566568/1566580 co-relation queries the response was YES. [2024-06-20 16:09:49,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67814 conditions, 5747 events. 3658/5747 cut-off events. For 1566568/1566580 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34478 event pairs, 602 based on Foata normal form. 10/5752 useless extension candidates. Maximal degree in co-relation 67597. Up to 5390 conditions per place. [2024-06-20 16:09:49,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 711 selfloop transitions, 43 changer transitions 0/759 dead transitions. [2024-06-20 16:09:49,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 759 transitions, 12811 flow [2024-06-20 16:09:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:09:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:09:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 16:09:49,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:09:49,794 INFO L175 Difference]: Start difference. First operand has 468 places, 743 transitions, 11079 flow. Second operand 10 states and 165 transitions. [2024-06-20 16:09:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 759 transitions, 12811 flow [2024-06-20 16:09:55,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 759 transitions, 12564 flow, removed 91 selfloop flow, removed 9 redundant places. [2024-06-20 16:09:55,778 INFO L231 Difference]: Finished difference. Result has 469 places, 745 transitions, 11117 flow [2024-06-20 16:09:55,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10832, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11117, PETRI_PLACES=469, PETRI_TRANSITIONS=745} [2024-06-20 16:09:55,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 16:09:55,778 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 745 transitions, 11117 flow [2024-06-20 16:09:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:09:55,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:55,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 16:09:55,779 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:09:55,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash 517777087, now seen corresponding path program 1 times [2024-06-20 16:09:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331219720] [2024-06-20 16:09:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331219720] [2024-06-20 16:09:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331219720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:56,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:56,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:09:56,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536152024] [2024-06-20 16:09:56,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:09:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:09:56,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:09:57,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:09:57,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 745 transitions, 11117 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:57,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:57,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:09:57,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:58,752 INFO L124 PetriNetUnfolderBase]: 3519/5623 cut-off events. [2024-06-20 16:09:58,752 INFO L125 PetriNetUnfolderBase]: For 1672460/1672460 co-relation queries the response was YES. [2024-06-20 16:09:58,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66798 conditions, 5623 events. 3519/5623 cut-off events. For 1672460/1672460 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34609 event pairs, 552 based on Foata normal form. 10/5630 useless extension candidates. Maximal degree in co-relation 66580. Up to 4859 conditions per place. [2024-06-20 16:09:58,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 686 selfloop transitions, 17 changer transitions 0/772 dead transitions. [2024-06-20 16:09:58,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 772 transitions, 12665 flow [2024-06-20 16:09:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:09:58,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:09:58,876 INFO L175 Difference]: Start difference. First operand has 469 places, 745 transitions, 11117 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:09:58,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 772 transitions, 12665 flow [2024-06-20 16:10:05,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 772 transitions, 12390 flow, removed 95 selfloop flow, removed 8 redundant places. [2024-06-20 16:10:05,730 INFO L231 Difference]: Finished difference. Result has 470 places, 746 transitions, 10926 flow [2024-06-20 16:10:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10842, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10926, PETRI_PLACES=470, PETRI_TRANSITIONS=746} [2024-06-20 16:10:05,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 16:10:05,732 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 746 transitions, 10926 flow [2024-06-20 16:10:05,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:05,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:05,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 16:10:05,740 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:05,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1875864405, now seen corresponding path program 2 times [2024-06-20 16:10:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136126550] [2024-06-20 16:10:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136126550] [2024-06-20 16:10:07,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136126550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:07,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:07,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127222257] [2024-06-20 16:10:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:07,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:07,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:07,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:07,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:10:07,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 746 transitions, 10926 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:07,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:07,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:10:07,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:09,195 INFO L124 PetriNetUnfolderBase]: 3527/5648 cut-off events. [2024-06-20 16:10:09,195 INFO L125 PetriNetUnfolderBase]: For 1620409/1620409 co-relation queries the response was YES. [2024-06-20 16:10:09,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66853 conditions, 5648 events. 3527/5648 cut-off events. For 1620409/1620409 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 34947 event pairs, 580 based on Foata normal form. 4/5649 useless extension candidates. Maximal degree in co-relation 66634. Up to 4911 conditions per place. [2024-06-20 16:10:09,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 678 selfloop transitions, 22 changer transitions 0/769 dead transitions. [2024-06-20 16:10:09,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 769 transitions, 12468 flow [2024-06-20 16:10:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:10:09,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:10:09,303 INFO L175 Difference]: Start difference. First operand has 470 places, 746 transitions, 10926 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:10:09,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 769 transitions, 12468 flow [2024-06-20 16:10:15,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 769 transitions, 12408 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:15,140 INFO L231 Difference]: Finished difference. Result has 473 places, 751 transitions, 11028 flow [2024-06-20 16:10:15,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10866, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11028, PETRI_PLACES=473, PETRI_TRANSITIONS=751} [2024-06-20 16:10:15,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 16:10:15,141 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 751 transitions, 11028 flow [2024-06-20 16:10:15,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:15,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:15,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:15,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 16:10:15,142 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:15,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash -738704785, now seen corresponding path program 3 times [2024-06-20 16:10:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:15,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274005159] [2024-06-20 16:10:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:15,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274005159] [2024-06-20 16:10:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274005159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611621298] [2024-06-20 16:10:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:16,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:16,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:10:16,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 751 transitions, 11028 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:16,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:16,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:10:16,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:18,467 INFO L124 PetriNetUnfolderBase]: 3561/5702 cut-off events. [2024-06-20 16:10:18,467 INFO L125 PetriNetUnfolderBase]: For 1710065/1710065 co-relation queries the response was YES. [2024-06-20 16:10:18,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67569 conditions, 5702 events. 3561/5702 cut-off events. For 1710065/1710065 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35311 event pairs, 576 based on Foata normal form. 10/5709 useless extension candidates. Maximal degree in co-relation 67348. Up to 4940 conditions per place. [2024-06-20 16:10:18,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 687 selfloop transitions, 18 changer transitions 0/774 dead transitions. [2024-06-20 16:10:18,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 774 transitions, 12576 flow [2024-06-20 16:10:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:10:18,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:10:18,576 INFO L175 Difference]: Start difference. First operand has 473 places, 751 transitions, 11028 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:10:18,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 774 transitions, 12576 flow [2024-06-20 16:10:24,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 774 transitions, 12477 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:24,799 INFO L231 Difference]: Finished difference. Result has 477 places, 752 transitions, 11019 flow [2024-06-20 16:10:24,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11019, PETRI_PLACES=477, PETRI_TRANSITIONS=752} [2024-06-20 16:10:24,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-20 16:10:24,799 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 752 transitions, 11019 flow [2024-06-20 16:10:24,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:24,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:24,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 16:10:24,803 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:24,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:24,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1372950281, now seen corresponding path program 4 times [2024-06-20 16:10:24,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:24,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766951647] [2024-06-20 16:10:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:24,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766951647] [2024-06-20 16:10:26,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766951647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:26,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:26,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:26,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030791540] [2024-06-20 16:10:26,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:26,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:26,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:26,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:26,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:26,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:10:26,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 752 transitions, 11019 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:26,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:26,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:10:26,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:28,011 INFO L124 PetriNetUnfolderBase]: 3605/5774 cut-off events. [2024-06-20 16:10:28,011 INFO L125 PetriNetUnfolderBase]: For 1782354/1782354 co-relation queries the response was YES. [2024-06-20 16:10:28,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68696 conditions, 5774 events. 3605/5774 cut-off events. For 1782354/1782354 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35934 event pairs, 597 based on Foata normal form. 14/5785 useless extension candidates. Maximal degree in co-relation 68473. Up to 4948 conditions per place. [2024-06-20 16:10:28,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 664 selfloop transitions, 39 changer transitions 0/772 dead transitions. [2024-06-20 16:10:28,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 772 transitions, 12665 flow [2024-06-20 16:10:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:10:28,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 16:10:28,127 INFO L175 Difference]: Start difference. First operand has 477 places, 752 transitions, 11019 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:10:28,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 772 transitions, 12665 flow [2024-06-20 16:10:35,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 772 transitions, 12599 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:35,273 INFO L231 Difference]: Finished difference. Result has 478 places, 754 transitions, 11146 flow [2024-06-20 16:10:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10953, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11146, PETRI_PLACES=478, PETRI_TRANSITIONS=754} [2024-06-20 16:10:35,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-20 16:10:35,274 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 754 transitions, 11146 flow [2024-06-20 16:10:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:35,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:35,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 16:10:35,275 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1218140335, now seen corresponding path program 5 times [2024-06-20 16:10:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:35,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245185540] [2024-06-20 16:10:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245185540] [2024-06-20 16:10:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245185540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:36,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430159993] [2024-06-20 16:10:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:36,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:36,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:10:36,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 754 transitions, 11146 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:36,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:36,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:10:36,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:38,591 INFO L124 PetriNetUnfolderBase]: 3614/5797 cut-off events. [2024-06-20 16:10:38,591 INFO L125 PetriNetUnfolderBase]: For 1689049/1689049 co-relation queries the response was YES. [2024-06-20 16:10:38,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69116 conditions, 5797 events. 3614/5797 cut-off events. For 1689049/1689049 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 36162 event pairs, 592 based on Foata normal form. 4/5796 useless extension candidates. Maximal degree in co-relation 68892. Up to 5039 conditions per place. [2024-06-20 16:10:38,693 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 679 selfloop transitions, 24 changer transitions 0/772 dead transitions. [2024-06-20 16:10:38,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 772 transitions, 12664 flow [2024-06-20 16:10:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:10:38,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:10:38,694 INFO L175 Difference]: Start difference. First operand has 478 places, 754 transitions, 11146 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:10:38,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 772 transitions, 12664 flow [2024-06-20 16:10:46,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 772 transitions, 12553 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:46,474 INFO L231 Difference]: Finished difference. Result has 481 places, 756 transitions, 11166 flow [2024-06-20 16:10:46,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11037, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11166, PETRI_PLACES=481, PETRI_TRANSITIONS=756} [2024-06-20 16:10:46,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 16:10:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 756 transitions, 11166 flow [2024-06-20 16:10:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:46,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:46,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 16:10:46,476 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1367443751, now seen corresponding path program 6 times [2024-06-20 16:10:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625556043] [2024-06-20 16:10:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:47,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:47,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625556043] [2024-06-20 16:10:47,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625556043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:47,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:47,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:47,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742709144] [2024-06-20 16:10:47,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:47,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:47,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:10:48,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 756 transitions, 11166 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:48,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:48,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:10:48,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:49,860 INFO L124 PetriNetUnfolderBase]: 3668/5874 cut-off events. [2024-06-20 16:10:49,861 INFO L125 PetriNetUnfolderBase]: For 1812393/1812393 co-relation queries the response was YES. [2024-06-20 16:10:49,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70251 conditions, 5874 events. 3668/5874 cut-off events. For 1812393/1812393 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36648 event pairs, 597 based on Foata normal form. 13/5882 useless extension candidates. Maximal degree in co-relation 70026. Up to 5078 conditions per place. [2024-06-20 16:10:49,975 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 677 selfloop transitions, 37 changer transitions 0/783 dead transitions. [2024-06-20 16:10:49,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 783 transitions, 13376 flow [2024-06-20 16:10:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:10:49,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 16:10:49,976 INFO L175 Difference]: Start difference. First operand has 481 places, 756 transitions, 11166 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:10:49,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 783 transitions, 13376 flow [2024-06-20 16:10:56,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 783 transitions, 13263 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:56,675 INFO L231 Difference]: Finished difference. Result has 485 places, 764 transitions, 11524 flow [2024-06-20 16:10:56,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11524, PETRI_PLACES=485, PETRI_TRANSITIONS=764} [2024-06-20 16:10:56,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 16:10:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 764 transitions, 11524 flow [2024-06-20 16:10:56,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:56,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:56,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 16:10:56,677 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:10:56,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1212624133, now seen corresponding path program 1 times [2024-06-20 16:10:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:56,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030005840] [2024-06-20 16:10:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:58,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:58,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030005840] [2024-06-20 16:10:58,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030005840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:58,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:58,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:10:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132230346] [2024-06-20 16:10:58,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:58,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:10:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:10:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:10:58,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:58,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 764 transitions, 11524 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:10:58,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:58,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:58,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:01,135 INFO L124 PetriNetUnfolderBase]: 3881/6099 cut-off events. [2024-06-20 16:11:01,136 INFO L125 PetriNetUnfolderBase]: For 1723811/1723811 co-relation queries the response was YES. [2024-06-20 16:11:01,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73154 conditions, 6099 events. 3881/6099 cut-off events. For 1723811/1723811 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37078 event pairs, 626 based on Foata normal form. 1/6097 useless extension candidates. Maximal degree in co-relation 72926. Up to 5751 conditions per place. [2024-06-20 16:11:01,266 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 747 selfloop transitions, 33 changer transitions 0/785 dead transitions. [2024-06-20 16:11:01,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 785 transitions, 13298 flow [2024-06-20 16:11:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:11:01,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-20 16:11:01,267 INFO L175 Difference]: Start difference. First operand has 485 places, 764 transitions, 11524 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:11:01,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 785 transitions, 13298 flow [2024-06-20 16:11:08,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 785 transitions, 13085 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:08,114 INFO L231 Difference]: Finished difference. Result has 492 places, 770 transitions, 11567 flow [2024-06-20 16:11:08,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11331, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11567, PETRI_PLACES=492, PETRI_TRANSITIONS=770} [2024-06-20 16:11:08,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-20 16:11:08,116 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 770 transitions, 11567 flow [2024-06-20 16:11:08,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:11:08,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:08,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 16:11:08,116 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:08,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1212422323, now seen corresponding path program 2 times [2024-06-20 16:11:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:08,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213321597] [2024-06-20 16:11:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213321597] [2024-06-20 16:11:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213321597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:11:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318035223] [2024-06-20 16:11:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:11:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:11:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:11:10,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:11:10,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 770 transitions, 11567 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:11:10,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:10,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:11:10,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:12,779 INFO L124 PetriNetUnfolderBase]: 3878/6087 cut-off events. [2024-06-20 16:11:12,779 INFO L125 PetriNetUnfolderBase]: For 1726778/1726778 co-relation queries the response was YES. [2024-06-20 16:11:12,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72579 conditions, 6087 events. 3878/6087 cut-off events. For 1726778/1726778 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36946 event pairs, 624 based on Foata normal form. 1/6085 useless extension candidates. Maximal degree in co-relation 72349. Up to 5729 conditions per place. [2024-06-20 16:11:12,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 736 selfloop transitions, 44 changer transitions 0/785 dead transitions. [2024-06-20 16:11:12,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 785 transitions, 13163 flow [2024-06-20 16:11:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:11:12,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-20 16:11:12,920 INFO L175 Difference]: Start difference. First operand has 492 places, 770 transitions, 11567 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:11:12,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 785 transitions, 13163 flow [2024-06-20 16:11:20,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 785 transitions, 12889 flow, removed 107 selfloop flow, removed 7 redundant places. [2024-06-20 16:11:20,114 INFO L231 Difference]: Finished difference. Result has 495 places, 770 transitions, 11387 flow [2024-06-20 16:11:20,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11293, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11387, PETRI_PLACES=495, PETRI_TRANSITIONS=770} [2024-06-20 16:11:20,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-20 16:11:20,115 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 770 transitions, 11387 flow [2024-06-20 16:11:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:11:20,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:20,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 16:11:20,116 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:20,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1337829081, now seen corresponding path program 7 times [2024-06-20 16:11:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:20,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061575416] [2024-06-20 16:11:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061575416] [2024-06-20 16:11:21,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061575416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:21,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:21,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942712082] [2024-06-20 16:11:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:21,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:21,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:21,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:11:21,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 770 transitions, 11387 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:21,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:21,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:11:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:23,576 INFO L124 PetriNetUnfolderBase]: 3717/5957 cut-off events. [2024-06-20 16:11:23,577 INFO L125 PetriNetUnfolderBase]: For 1881049/1881052 co-relation queries the response was YES. [2024-06-20 16:11:23,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71751 conditions, 5957 events. 3717/5957 cut-off events. For 1881049/1881052 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 37325 event pairs, 608 based on Foata normal form. 14/5965 useless extension candidates. Maximal degree in co-relation 71520. Up to 5143 conditions per place. [2024-06-20 16:11:23,694 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 675 selfloop transitions, 44 changer transitions 0/788 dead transitions. [2024-06-20 16:11:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 788 transitions, 13347 flow [2024-06-20 16:11:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:11:23,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:11:23,696 INFO L175 Difference]: Start difference. First operand has 495 places, 770 transitions, 11387 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:11:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 788 transitions, 13347 flow [2024-06-20 16:11:30,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 788 transitions, 13155 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 16:11:30,982 INFO L231 Difference]: Finished difference. Result has 496 places, 772 transitions, 11375 flow [2024-06-20 16:11:30,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11195, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11375, PETRI_PLACES=496, PETRI_TRANSITIONS=772} [2024-06-20 16:11:30,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 16:11:30,983 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 772 transitions, 11375 flow [2024-06-20 16:11:30,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:30,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:30,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 16:11:30,983 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:30,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1332466701, now seen corresponding path program 8 times [2024-06-20 16:11:30,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:30,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265316543] [2024-06-20 16:11:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:30,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:32,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:32,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265316543] [2024-06-20 16:11:32,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265316543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:32,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:32,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317514783] [2024-06-20 16:11:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:32,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:32,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:32,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:11:32,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 772 transitions, 11375 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:32,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:32,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:11:32,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:34,337 INFO L124 PetriNetUnfolderBase]: 3725/5969 cut-off events. [2024-06-20 16:11:34,337 INFO L125 PetriNetUnfolderBase]: For 1807837/1807840 co-relation queries the response was YES. [2024-06-20 16:11:34,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72222 conditions, 5969 events. 3725/5969 cut-off events. For 1807837/1807840 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 37410 event pairs, 610 based on Foata normal form. 6/5969 useless extension candidates. Maximal degree in co-relation 71991. Up to 5208 conditions per place. [2024-06-20 16:11:34,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 691 selfloop transitions, 29 changer transitions 0/789 dead transitions. [2024-06-20 16:11:34,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 789 transitions, 12995 flow [2024-06-20 16:11:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:11:34,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:11:34,458 INFO L175 Difference]: Start difference. First operand has 496 places, 772 transitions, 11375 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:11:34,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 789 transitions, 12995 flow [2024-06-20 16:11:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 789 transitions, 12879 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:42,081 INFO L231 Difference]: Finished difference. Result has 500 places, 777 transitions, 11491 flow [2024-06-20 16:11:42,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=743, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11491, PETRI_PLACES=500, PETRI_TRANSITIONS=777} [2024-06-20 16:11:42,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-20 16:11:42,082 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 777 transitions, 11491 flow [2024-06-20 16:11:42,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:42,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:42,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:42,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 16:11:42,082 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:42,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:42,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1332318831, now seen corresponding path program 9 times [2024-06-20 16:11:42,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:42,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878913240] [2024-06-20 16:11:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:42,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878913240] [2024-06-20 16:11:43,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878913240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:43,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:43,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847536482] [2024-06-20 16:11:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:43,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:11:43,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 777 transitions, 11491 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:43,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:43,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:11:43,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:45,501 INFO L124 PetriNetUnfolderBase]: 3759/6023 cut-off events. [2024-06-20 16:11:45,502 INFO L125 PetriNetUnfolderBase]: For 1900678/1900681 co-relation queries the response was YES. [2024-06-20 16:11:45,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72843 conditions, 6023 events. 3759/6023 cut-off events. For 1900678/1900681 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37770 event pairs, 606 based on Foata normal form. 12/6029 useless extension candidates. Maximal degree in co-relation 72610. Up to 5237 conditions per place. [2024-06-20 16:11:45,625 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 700 selfloop transitions, 25 changer transitions 0/794 dead transitions. [2024-06-20 16:11:45,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 794 transitions, 13085 flow [2024-06-20 16:11:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:11:45,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:11:45,626 INFO L175 Difference]: Start difference. First operand has 500 places, 777 transitions, 11491 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:11:45,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 794 transitions, 13085 flow [2024-06-20 16:11:53,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 794 transitions, 12953 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:53,789 INFO L231 Difference]: Finished difference. Result has 503 places, 778 transitions, 11473 flow [2024-06-20 16:11:53,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11359, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11473, PETRI_PLACES=503, PETRI_TRANSITIONS=778} [2024-06-20 16:11:53,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-20 16:11:53,789 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 778 transitions, 11473 flow [2024-06-20 16:11:53,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:53,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:53,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:53,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 16:11:53,790 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:11:53,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash -187169861, now seen corresponding path program 10 times [2024-06-20 16:11:53,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:53,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188059812] [2024-06-20 16:11:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:53,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:55,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188059812] [2024-06-20 16:11:55,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188059812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:55,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:55,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535314295] [2024-06-20 16:11:55,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:55,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:11:55,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 778 transitions, 11473 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:55,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:55,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:11:55,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:57,577 INFO L124 PetriNetUnfolderBase]: 3749/6007 cut-off events. [2024-06-20 16:11:57,578 INFO L125 PetriNetUnfolderBase]: For 1799612/1799615 co-relation queries the response was YES. [2024-06-20 16:11:57,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71894 conditions, 6007 events. 3749/6007 cut-off events. For 1799612/1799615 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37625 event pairs, 612 based on Foata normal form. 6/6007 useless extension candidates. Maximal degree in co-relation 71660. Up to 5211 conditions per place. [2024-06-20 16:11:57,707 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 657 selfloop transitions, 66 changer transitions 0/792 dead transitions. [2024-06-20 16:11:57,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 792 transitions, 13037 flow [2024-06-20 16:11:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:11:57,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:11:57,709 INFO L175 Difference]: Start difference. First operand has 503 places, 778 transitions, 11473 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:11:57,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 792 transitions, 13037 flow [2024-06-20 16:12:06,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 792 transitions, 12953 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:06,631 INFO L231 Difference]: Finished difference. Result has 505 places, 780 transitions, 11621 flow [2024-06-20 16:12:06,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11621, PETRI_PLACES=505, PETRI_TRANSITIONS=780} [2024-06-20 16:12:06,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-20 16:12:06,632 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 780 transitions, 11621 flow [2024-06-20 16:12:06,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 16:12:06,633 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:06,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash -326300881, now seen corresponding path program 3 times [2024-06-20 16:12:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786415144] [2024-06-20 16:12:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786415144] [2024-06-20 16:12:08,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786415144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:08,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:08,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:12:08,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410170913] [2024-06-20 16:12:08,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:08,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:12:08,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:12:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:12:08,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:12:08,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 780 transitions, 11621 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:08,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:08,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:12:08,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:10,907 INFO L124 PetriNetUnfolderBase]: 3979/6250 cut-off events. [2024-06-20 16:12:10,907 INFO L125 PetriNetUnfolderBase]: For 1810801/1810804 co-relation queries the response was YES. [2024-06-20 16:12:10,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74272 conditions, 6250 events. 3979/6250 cut-off events. For 1810801/1810804 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 38141 event pairs, 644 based on Foata normal form. 2/6247 useless extension candidates. Maximal degree in co-relation 74037. Up to 5778 conditions per place. [2024-06-20 16:12:11,030 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 688 selfloop transitions, 112 changer transitions 0/805 dead transitions. [2024-06-20 16:12:11,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 805 transitions, 14062 flow [2024-06-20 16:12:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:11,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:12:11,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-20 16:12:11,032 INFO L175 Difference]: Start difference. First operand has 505 places, 780 transitions, 11621 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:12:11,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 805 transitions, 14062 flow [2024-06-20 16:12:19,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 805 transitions, 13843 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:19,193 INFO L231 Difference]: Finished difference. Result has 509 places, 792 transitions, 12135 flow [2024-06-20 16:12:19,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11407, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12135, PETRI_PLACES=509, PETRI_TRANSITIONS=792} [2024-06-20 16:12:19,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-20 16:12:19,194 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 792 transitions, 12135 flow [2024-06-20 16:12:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:19,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:19,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 16:12:19,195 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:19,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 69546130, now seen corresponding path program 1 times [2024-06-20 16:12:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119661556] [2024-06-20 16:12:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:20,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:20,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119661556] [2024-06-20 16:12:20,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119661556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:20,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:20,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:12:20,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064786027] [2024-06-20 16:12:20,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:12:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:12:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:12:20,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:12:20,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 792 transitions, 12135 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:20,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:20,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:12:20,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:22,683 INFO L124 PetriNetUnfolderBase]: 3987/6259 cut-off events. [2024-06-20 16:12:22,683 INFO L125 PetriNetUnfolderBase]: For 1854941/1854944 co-relation queries the response was YES. [2024-06-20 16:12:22,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74887 conditions, 6259 events. 3987/6259 cut-off events. For 1854941/1854944 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 38172 event pairs, 636 based on Foata normal form. 4/6259 useless extension candidates. Maximal degree in co-relation 74650. Up to 5861 conditions per place. [2024-06-20 16:12:22,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 735 selfloop transitions, 66 changer transitions 0/806 dead transitions. [2024-06-20 16:12:22,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 806 transitions, 13879 flow [2024-06-20 16:12:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:12:22,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:12:22,814 INFO L175 Difference]: Start difference. First operand has 509 places, 792 transitions, 12135 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:12:22,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 806 transitions, 13879 flow [2024-06-20 16:12:30,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 806 transitions, 13291 flow, removed 174 selfloop flow, removed 9 redundant places. [2024-06-20 16:12:30,546 INFO L231 Difference]: Finished difference. Result has 509 places, 794 transitions, 11802 flow [2024-06-20 16:12:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11549, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11802, PETRI_PLACES=509, PETRI_TRANSITIONS=794} [2024-06-20 16:12:30,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-20 16:12:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 794 transitions, 11802 flow [2024-06-20 16:12:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:30,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:30,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:30,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 16:12:30,548 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1338044562, now seen corresponding path program 2 times [2024-06-20 16:12:30,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042096658] [2024-06-20 16:12:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042096658] [2024-06-20 16:12:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042096658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:32,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:32,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:12:32,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554506051] [2024-06-20 16:12:32,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:12:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:12:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:12:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:12:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 794 transitions, 11802 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:32,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:32,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:12:32,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:34,439 INFO L124 PetriNetUnfolderBase]: 4031/6327 cut-off events. [2024-06-20 16:12:34,440 INFO L125 PetriNetUnfolderBase]: For 1985907/1985910 co-relation queries the response was YES. [2024-06-20 16:12:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75201 conditions, 6327 events. 4031/6327 cut-off events. For 1985907/1985910 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38661 event pairs, 646 based on Foata normal form. 12/6335 useless extension candidates. Maximal degree in co-relation 74967. Up to 5931 conditions per place. [2024-06-20 16:12:34,556 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 771 selfloop transitions, 37 changer transitions 0/813 dead transitions. [2024-06-20 16:12:34,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 813 transitions, 13664 flow [2024-06-20 16:12:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:12:34,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:12:34,557 INFO L175 Difference]: Start difference. First operand has 509 places, 794 transitions, 11802 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:12:34,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 813 transitions, 13664 flow [2024-06-20 16:12:41,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 813 transitions, 13427 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 16:12:41,896 INFO L231 Difference]: Finished difference. Result has 511 places, 797 transitions, 11773 flow [2024-06-20 16:12:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11565, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11773, PETRI_PLACES=511, PETRI_TRANSITIONS=797} [2024-06-20 16:12:41,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-20 16:12:41,896 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 797 transitions, 11773 flow [2024-06-20 16:12:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:41,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:41,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 16:12:41,897 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:41,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1337835033, now seen corresponding path program 4 times [2024-06-20 16:12:41,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:41,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295155744] [2024-06-20 16:12:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:43,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:43,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295155744] [2024-06-20 16:12:43,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295155744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:43,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:43,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:12:43,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201613801] [2024-06-20 16:12:43,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:12:43,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:43,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:12:43,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:12:43,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:12:43,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 797 transitions, 11773 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:43,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:43,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:12:43,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:45,921 INFO L124 PetriNetUnfolderBase]: 4041/6341 cut-off events. [2024-06-20 16:12:45,921 INFO L125 PetriNetUnfolderBase]: For 1883352/1883355 co-relation queries the response was YES. [2024-06-20 16:12:46,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75335 conditions, 6341 events. 4041/6341 cut-off events. For 1883352/1883355 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38760 event pairs, 646 based on Foata normal form. 3/6340 useless extension candidates. Maximal degree in co-relation 75100. Up to 5974 conditions per place. [2024-06-20 16:12:46,059 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 760 selfloop transitions, 51 changer transitions 0/816 dead transitions. [2024-06-20 16:12:46,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 816 transitions, 13862 flow [2024-06-20 16:12:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 16:12:46,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:12:46,061 INFO L175 Difference]: Start difference. First operand has 511 places, 797 transitions, 11773 flow. Second operand 10 states and 170 transitions. [2024-06-20 16:12:46,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 816 transitions, 13862 flow [2024-06-20 16:12:53,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 816 transitions, 13727 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:53,628 INFO L231 Difference]: Finished difference. Result has 515 places, 803 transitions, 11849 flow [2024-06-20 16:12:53,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11638, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11849, PETRI_PLACES=515, PETRI_TRANSITIONS=803} [2024-06-20 16:12:53,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-20 16:12:53,629 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 803 transitions, 11849 flow [2024-06-20 16:12:53,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:53,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:53,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:53,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 16:12:53,629 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:12:53,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:53,630 INFO L85 PathProgramCache]: Analyzing trace with hash 79069330, now seen corresponding path program 3 times [2024-06-20 16:12:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065677910] [2024-06-20 16:12:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:53,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065677910] [2024-06-20 16:12:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065677910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:55,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:55,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:12:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064232340] [2024-06-20 16:12:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:12:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:12:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:12:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:12:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 803 transitions, 11849 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:12:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:12:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:57,255 INFO L124 PetriNetUnfolderBase]: 4085/6409 cut-off events. [2024-06-20 16:12:57,255 INFO L125 PetriNetUnfolderBase]: For 1915293/1915296 co-relation queries the response was YES. [2024-06-20 16:12:57,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75874 conditions, 6409 events. 4085/6409 cut-off events. For 1915293/1915296 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 39193 event pairs, 646 based on Foata normal form. 4/6409 useless extension candidates. Maximal degree in co-relation 75638. Up to 5892 conditions per place. [2024-06-20 16:12:57,384 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 742 selfloop transitions, 81 changer transitions 0/828 dead transitions. [2024-06-20 16:12:57,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 828 transitions, 14261 flow [2024-06-20 16:12:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:12:57,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:12:57,386 INFO L175 Difference]: Start difference. First operand has 515 places, 803 transitions, 11849 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:12:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 828 transitions, 14261 flow [2024-06-20 16:13:04,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 828 transitions, 14085 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:04,954 INFO L231 Difference]: Finished difference. Result has 518 places, 808 transitions, 12132 flow [2024-06-20 16:13:04,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11673, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12132, PETRI_PLACES=518, PETRI_TRANSITIONS=808} [2024-06-20 16:13:04,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-20 16:13:04,955 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 808 transitions, 12132 flow [2024-06-20 16:13:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:04,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:04,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:04,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 16:13:04,956 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:04,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash -187163909, now seen corresponding path program 5 times [2024-06-20 16:13:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:04,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984708638] [2024-06-20 16:13:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:06,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984708638] [2024-06-20 16:13:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984708638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:06,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:06,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:13:06,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916150494] [2024-06-20 16:13:06,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:06,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:13:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:13:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:13:06,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:13:06,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 808 transitions, 12132 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:06,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:06,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:13:06,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:09,226 INFO L124 PetriNetUnfolderBase]: 4095/6427 cut-off events. [2024-06-20 16:13:09,227 INFO L125 PetriNetUnfolderBase]: For 1921175/1921178 co-relation queries the response was YES. [2024-06-20 16:13:09,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76482 conditions, 6427 events. 4095/6427 cut-off events. For 1921175/1921178 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39368 event pairs, 652 based on Foata normal form. 3/6426 useless extension candidates. Maximal degree in co-relation 76244. Up to 6021 conditions per place. [2024-06-20 16:13:09,343 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 744 selfloop transitions, 77 changer transitions 0/826 dead transitions. [2024-06-20 16:13:09,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 826 transitions, 13966 flow [2024-06-20 16:13:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-20 16:13:09,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-20 16:13:09,349 INFO L175 Difference]: Start difference. First operand has 518 places, 808 transitions, 12132 flow. Second operand 10 states and 168 transitions. [2024-06-20 16:13:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 826 transitions, 13966 flow [2024-06-20 16:13:18,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 826 transitions, 13751 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:18,064 INFO L231 Difference]: Finished difference. Result has 523 places, 814 transitions, 12247 flow [2024-06-20 16:13:18,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11917, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12247, PETRI_PLACES=523, PETRI_TRANSITIONS=814} [2024-06-20 16:13:18,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-20 16:13:18,065 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 814 transitions, 12247 flow [2024-06-20 16:13:18,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:18,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:18,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:18,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 16:13:18,065 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:18,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1338036843, now seen corresponding path program 6 times [2024-06-20 16:13:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:18,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644496876] [2024-06-20 16:13:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:18,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644496876] [2024-06-20 16:13:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644496876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:20,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:13:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347308392] [2024-06-20 16:13:20,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:13:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:13:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:13:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:13:20,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 814 transitions, 12247 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:13:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:22,665 INFO L124 PetriNetUnfolderBase]: 4092/6421 cut-off events. [2024-06-20 16:13:22,665 INFO L125 PetriNetUnfolderBase]: For 1923010/1923013 co-relation queries the response was YES. [2024-06-20 16:13:22,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76196 conditions, 6421 events. 4092/6421 cut-off events. For 1923010/1923013 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 39338 event pairs, 654 based on Foata normal form. 3/6420 useless extension candidates. Maximal degree in co-relation 75957. Up to 6065 conditions per place. [2024-06-20 16:13:22,780 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 778 selfloop transitions, 43 changer transitions 0/826 dead transitions. [2024-06-20 16:13:22,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 826 transitions, 13917 flow [2024-06-20 16:13:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:13:22,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 16:13:22,782 INFO L175 Difference]: Start difference. First operand has 523 places, 814 transitions, 12247 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:13:22,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 826 transitions, 13917 flow [2024-06-20 16:13:32,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 826 transitions, 13581 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:32,775 INFO L231 Difference]: Finished difference. Result has 525 places, 814 transitions, 12003 flow [2024-06-20 16:13:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11911, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12003, PETRI_PLACES=525, PETRI_TRANSITIONS=814} [2024-06-20 16:13:32,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-20 16:13:32,776 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 814 transitions, 12003 flow [2024-06-20 16:13:32,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:32,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:32,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 16:13:32,777 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -186962099, now seen corresponding path program 7 times [2024-06-20 16:13:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078479818] [2024-06-20 16:13:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078479818] [2024-06-20 16:13:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078479818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:34,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:34,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:13:34,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623720280] [2024-06-20 16:13:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:34,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:13:34,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:13:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:13:34,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:13:34,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 814 transitions, 12003 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:34,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:34,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:13:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:36,950 INFO L124 PetriNetUnfolderBase]: 4097/6430 cut-off events. [2024-06-20 16:13:36,950 INFO L125 PetriNetUnfolderBase]: For 1942233/1942236 co-relation queries the response was YES. [2024-06-20 16:13:37,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76231 conditions, 6430 events. 4097/6430 cut-off events. For 1942233/1942236 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 39379 event pairs, 652 based on Foata normal form. 3/6429 useless extension candidates. Maximal degree in co-relation 75991. Up to 6024 conditions per place. [2024-06-20 16:13:37,079 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 748 selfloop transitions, 76 changer transitions 0/829 dead transitions. [2024-06-20 16:13:37,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 829 transitions, 13829 flow [2024-06-20 16:13:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:13:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:13:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 16:13:37,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-20 16:13:37,080 INFO L175 Difference]: Start difference. First operand has 525 places, 814 transitions, 12003 flow. Second operand 10 states and 169 transitions. [2024-06-20 16:13:37,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 829 transitions, 13829 flow [2024-06-20 16:13:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 829 transitions, 13661 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 16:13:46,056 INFO L231 Difference]: Finished difference. Result has 526 places, 817 transitions, 12149 flow [2024-06-20 16:13:46,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11835, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12149, PETRI_PLACES=526, PETRI_TRANSITIONS=817} [2024-06-20 16:13:46,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-20 16:13:46,057 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 817 transitions, 12149 flow [2024-06-20 16:13:46,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 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) [2024-06-20 16:13:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:46,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 16:13:46,058 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:46,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash -186954659, now seen corresponding path program 8 times [2024-06-20 16:13:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:46,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028318459] [2024-06-20 16:13:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:47,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:47,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028318459] [2024-06-20 16:13:47,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028318459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:47,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:47,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595945791] [2024-06-20 16:13:47,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:47,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:47,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:47,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:13:47,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 817 transitions, 12149 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) [2024-06-20 16:13:47,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:47,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:13:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:50,021 INFO L124 PetriNetUnfolderBase]: 4094/6430 cut-off events. [2024-06-20 16:13:50,021 INFO L125 PetriNetUnfolderBase]: For 1947289/1947292 co-relation queries the response was YES. [2024-06-20 16:13:50,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76129 conditions, 6430 events. 4094/6430 cut-off events. For 1947289/1947292 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 39438 event pairs, 654 based on Foata normal form. 3/6429 useless extension candidates. Maximal degree in co-relation 75889. Up to 5967 conditions per place. [2024-06-20 16:13:50,196 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 715 selfloop transitions, 108 changer transitions 0/828 dead transitions. [2024-06-20 16:13:50,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 828 transitions, 13821 flow [2024-06-20 16:13:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:13:50,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:13:50,197 INFO L175 Difference]: Start difference. First operand has 526 places, 817 transitions, 12149 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:13:50,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 828 transitions, 13821 flow [2024-06-20 16:13:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 828 transitions, 13473 flow, removed 108 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:59,606 INFO L231 Difference]: Finished difference. Result has 529 places, 817 transitions, 12027 flow [2024-06-20 16:13:59,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11801, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12027, PETRI_PLACES=529, PETRI_TRANSITIONS=817} [2024-06-20 16:13:59,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-20 16:13:59,606 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 817 transitions, 12027 flow [2024-06-20 16:13:59,607 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) [2024-06-20 16:13:59,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:59,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:59,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 16:13:59,607 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:13:59,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash -186954380, now seen corresponding path program 4 times [2024-06-20 16:13:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143579962] [2024-06-20 16:13:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143579962] [2024-06-20 16:14:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143579962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:00,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:00,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396819226] [2024-06-20 16:14:00,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:00,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:00,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:00,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:14:00,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 817 transitions, 12027 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) [2024-06-20 16:14:00,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:00,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:14:00,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:03,048 INFO L124 PetriNetUnfolderBase]: 4089/6423 cut-off events. [2024-06-20 16:14:03,049 INFO L125 PetriNetUnfolderBase]: For 1948965/1948968 co-relation queries the response was YES. [2024-06-20 16:14:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75651 conditions, 6423 events. 4089/6423 cut-off events. For 1948965/1948968 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 39331 event pairs, 653 based on Foata normal form. 4/6423 useless extension candidates. Maximal degree in co-relation 75410. Up to 6017 conditions per place. [2024-06-20 16:14:03,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 760 selfloop transitions, 64 changer transitions 0/829 dead transitions. [2024-06-20 16:14:03,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 829 transitions, 13703 flow [2024-06-20 16:14:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:14:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:14:03,167 INFO L175 Difference]: Start difference. First operand has 529 places, 817 transitions, 12027 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:14:03,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 829 transitions, 13703 flow [2024-06-20 16:14:13,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 829 transitions, 13345 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-20 16:14:13,234 INFO L231 Difference]: Finished difference. Result has 530 places, 817 transitions, 11802 flow [2024-06-20 16:14:13,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11669, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11802, PETRI_PLACES=530, PETRI_TRANSITIONS=817} [2024-06-20 16:14:13,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-20 16:14:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 817 transitions, 11802 flow [2024-06-20 16:14:13,235 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) [2024-06-20 16:14:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:13,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 16:14:13,235 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:14:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash -465163676, now seen corresponding path program 1 times [2024-06-20 16:14:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173918391] [2024-06-20 16:14:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:13,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:13,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173918391] [2024-06-20 16:14:13,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173918391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:13,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:13,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:14:13,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643084438] [2024-06-20 16:14:13,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:13,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:14:13,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:13,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:14:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:14:13,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:14:13,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 817 transitions, 11802 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:13,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:13,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:14:13,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15