./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.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/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:45:56,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:45:56,244 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:45:56,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:45:56,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:45:56,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:45:56,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:45:56,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:45:56,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:45:56,281 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:45:56,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:45:56,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:45:56,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:45:56,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:45:56,283 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:45:56,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:45:56,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:45:56,283 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:45:56,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:45:56,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:45:56,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:45:56,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:45:56,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:45:56,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:45:56,285 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:45:56,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:45:56,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:45:56,285 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:45:56,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:45:56,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:45:56,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:45:56,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:45:56,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:45:56,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:45:56,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:45:56,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:45:56,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:45:56,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:45:56,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:45:56,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:45:56,289 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:45:56,292 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:45:56,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:45:56,292 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:45:56,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:45:56,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:45:56,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:45:56,540 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:45:56,540 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:45:56,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:45:57,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:45:57,663 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:45:57,663 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:45:57,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6764762a5/eff59e8569714a458a990573cb48e8ed/FLAG64e784ddb [2024-06-14 12:45:57,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6764762a5/eff59e8569714a458a990573cb48e8ed [2024-06-14 12:45:57,688 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:45:57,688 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:45:57,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:45:57,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:45:57,836 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:45:57,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:45:57,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:45:57,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:45:57,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:45:57" (1/2) ... [2024-06-14 12:45:57,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2535c9f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:45:57, skipping insertion in model container [2024-06-14 12:45:57,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:45:57" (1/2) ... [2024-06-14 12:45:57,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c14d4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:45:57, skipping insertion in model container [2024-06-14 12:45:57,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:45:57" (2/2) ... [2024-06-14 12:45:57,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2535c9f5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:57, skipping insertion in model container [2024-06-14 12:45:57,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:45:57" (2/2) ... [2024-06-14 12:45:57,845 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:45:57,914 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:45:57,916 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-14 12:45:57,916 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-14 12:45:57,916 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) [2024-06-14 12:45:57,916 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:45:57,916 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-14 12:45:57,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:45:58,322 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:45:58,332 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:45:58,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:45:58,514 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:45:58,514 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58 WrapperNode [2024-06-14 12:45:58,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:45:58,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:45:58,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:45:58,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:45:58,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,571 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 148 [2024-06-14 12:45:58,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:45:58,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:45:58,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:45:58,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:45:58,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,666 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:45:58,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:45:58,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:45:58,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:45:58,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:45:58,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (1/1) ... [2024-06-14 12:45:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:45:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:45:58,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:45:58,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:45:58,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:45:58,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:45:58,737 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:45:58,738 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:45:58,738 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:45:58,738 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:45:58,738 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:45:58,738 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:45:58,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:45:58,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:45:58,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:45:58,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:45:58,740 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:45:58,833 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:45:58,836 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:45:59,130 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:45:59,130 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:45:59,297 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:45:59,298 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:45:59,298 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:45:59 BoogieIcfgContainer [2024-06-14 12:45:59,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:45:59,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:45:59,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:45:59,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:45:59,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:45:57" (1/4) ... [2024-06-14 12:45:59,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17348f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:45:59, skipping insertion in model container [2024-06-14 12:45:59,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:45:57" (2/4) ... [2024-06-14 12:45:59,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17348f86 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:45:59, skipping insertion in model container [2024-06-14 12:45:59,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:45:58" (3/4) ... [2024-06-14 12:45:59,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17348f86 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:45:59, skipping insertion in model container [2024-06-14 12:45:59,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:45:59" (4/4) ... [2024-06-14 12:45:59,308 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_power.opt_pso.oepc_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:45:59,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:45:59,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:45:59,323 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:45:59,369 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:45:59,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:45:59,430 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:45:59,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:45:59,433 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 67 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. [2024-06-14 12:45:59,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:45:59,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:45:59,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:45:59,454 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;@4313af0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:45:59,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:45:59,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:45:59,460 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:45:59,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:45:59,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:59,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:45:59,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:59,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash -505467053, now seen corresponding path program 1 times [2024-06-14 12:45:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:59,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042846249] [2024-06-14 12:45:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:59,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042846249] [2024-06-14 12:46:00,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042846249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:00,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:46:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778450032] [2024-06-14 12:46:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:00,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:46:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:46:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:46:00,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 12:46:00,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:00,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:00,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 12:46:00,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:00,736 INFO L124 PetriNetUnfolderBase]: 891/1389 cut-off events. [2024-06-14 12:46:00,736 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-14 12:46:00,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1389 events. 891/1389 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6670 event pairs, 463 based on Foata normal form. 2/1363 useless extension candidates. Maximal degree in co-relation 2797. Up to 1335 conditions per place. [2024-06-14 12:46:00,749 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:46:00,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 175 flow [2024-06-14 12:46:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:46:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:46:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-14 12:46:00,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 12:46:00,760 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 76 transitions. [2024-06-14 12:46:00,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 175 flow [2024-06-14 12:46:00,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:00,765 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:46:00,766 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} [2024-06-14 12:46:00,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:46:00,769 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:46:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:00,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:00,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:00,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:46:00,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:00,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 596981969, now seen corresponding path program 1 times [2024-06-14 12:46:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29169802] [2024-06-14 12:46:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29169802] [2024-06-14 12:46:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29169802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:01,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:46:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866043580] [2024-06-14 12:46:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:46:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:46:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:46:01,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-14 12:46:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:01,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-14 12:46:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:02,274 INFO L124 PetriNetUnfolderBase]: 1131/1744 cut-off events. [2024-06-14 12:46:02,274 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-14 12:46:02,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4014 conditions, 1744 events. 1131/1744 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8192 event pairs, 409 based on Foata normal form. 6/1744 useless extension candidates. Maximal degree in co-relation 3999. Up to 1639 conditions per place. [2024-06-14 12:46:02,284 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 39 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-14 12:46:02,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 228 flow [2024-06-14 12:46:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:46:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:46:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 12:46:02,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 12:46:02,288 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 92 transitions. [2024-06-14 12:46:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 228 flow [2024-06-14 12:46:02,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:46:02,290 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-14 12:46:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-14 12:46:02,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-14 12:46:02,291 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-14 12:46:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:02,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:02,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:46:02,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:02,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1276442192, now seen corresponding path program 1 times [2024-06-14 12:46:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:02,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79332804] [2024-06-14 12:46:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:02,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79332804] [2024-06-14 12:46:02,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79332804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:02,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:46:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913505081] [2024-06-14 12:46:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:46:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:46:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:46:03,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-14 12:46:03,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:03,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:03,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-14 12:46:03,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:03,294 INFO L124 PetriNetUnfolderBase]: 888/1394 cut-off events. [2024-06-14 12:46:03,294 INFO L125 PetriNetUnfolderBase]: For 732/732 co-relation queries the response was YES. [2024-06-14 12:46:03,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3499 conditions, 1394 events. 888/1394 cut-off events. For 732/732 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6708 event pairs, 408 based on Foata normal form. 4/1397 useless extension candidates. Maximal degree in co-relation 3482. Up to 1326 conditions per place. [2024-06-14 12:46:03,300 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-14 12:46:03,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 275 flow [2024-06-14 12:46:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:46:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:46:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-14 12:46:03,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 12:46:03,301 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 5 states and 100 transitions. [2024-06-14 12:46:03,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 275 flow [2024-06-14 12:46:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 258 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:46:03,304 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 172 flow [2024-06-14 12:46:03,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-14 12:46:03,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-14 12:46:03,304 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 172 flow [2024-06-14 12:46:03,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:03,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:03,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:46:03,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 907853390, now seen corresponding path program 1 times [2024-06-14 12:46:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:03,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761684841] [2024-06-14 12:46:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:04,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761684841] [2024-06-14 12:46:04,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761684841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:04,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:04,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:04,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217106701] [2024-06-14 12:46:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:04,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:04,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-14 12:46:04,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:04,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:04,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-14 12:46:04,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:04,640 INFO L124 PetriNetUnfolderBase]: 894/1405 cut-off events. [2024-06-14 12:46:04,640 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-06-14 12:46:04,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 1405 events. 894/1405 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6786 event pairs, 393 based on Foata normal form. 4/1408 useless extension candidates. Maximal degree in co-relation 4014. Up to 1317 conditions per place. [2024-06-14 12:46:04,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 44 selfloop transitions, 12 changer transitions 0/62 dead transitions. [2024-06-14 12:46:04,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 346 flow [2024-06-14 12:46:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:46:04,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-14 12:46:04,649 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 172 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:46:04,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 346 flow [2024-06-14 12:46:04,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 332 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:46:04,652 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 219 flow [2024-06-14 12:46:04,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 12:46:04,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 12:46:04,653 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 219 flow [2024-06-14 12:46:04,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:04,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:04,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:46:04,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:04,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash 391280115, now seen corresponding path program 1 times [2024-06-14 12:46:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435180700] [2024-06-14 12:46:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435180700] [2024-06-14 12:46:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435180700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:05,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888796446] [2024-06-14 12:46:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:05,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:05,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:05,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:05,861 INFO L124 PetriNetUnfolderBase]: 1128/1755 cut-off events. [2024-06-14 12:46:05,862 INFO L125 PetriNetUnfolderBase]: For 2836/2836 co-relation queries the response was YES. [2024-06-14 12:46:05,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5487 conditions, 1755 events. 1128/1755 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8284 event pairs, 441 based on Foata normal form. 2/1756 useless extension candidates. Maximal degree in co-relation 5465. Up to 1625 conditions per place. [2024-06-14 12:46:05,875 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 45 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-14 12:46:05,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 395 flow [2024-06-14 12:46:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:46:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:46:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-14 12:46:05,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-14 12:46:05,878 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 219 flow. Second operand 5 states and 99 transitions. [2024-06-14 12:46:05,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 395 flow [2024-06-14 12:46:05,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 364 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:05,886 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 254 flow [2024-06-14 12:46:05,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-06-14 12:46:05,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 12:46:05,888 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 254 flow [2024-06-14 12:46:05,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:05,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:05,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:05,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:46:05,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:05,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1150160483, now seen corresponding path program 1 times [2024-06-14 12:46:05,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:05,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370598637] [2024-06-14 12:46:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:05,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:07,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:07,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370598637] [2024-06-14 12:46:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370598637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:07,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231862195] [2024-06-14 12:46:07,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:07,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:07,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:07,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:07,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:07,695 INFO L124 PetriNetUnfolderBase]: 1062/1628 cut-off events. [2024-06-14 12:46:07,695 INFO L125 PetriNetUnfolderBase]: For 4161/4161 co-relation queries the response was YES. [2024-06-14 12:46:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5632 conditions, 1628 events. 1062/1628 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7815 event pairs, 439 based on Foata normal form. 4/1631 useless extension candidates. Maximal degree in co-relation 5609. Up to 1529 conditions per place. [2024-06-14 12:46:07,705 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 56 selfloop transitions, 20 changer transitions 0/81 dead transitions. [2024-06-14 12:46:07,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 514 flow [2024-06-14 12:46:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:46:07,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-14 12:46:07,706 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 254 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:46:07,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 514 flow [2024-06-14 12:46:07,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 476 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:07,709 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 324 flow [2024-06-14 12:46:07,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 12:46:07,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-14 12:46:07,710 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 324 flow [2024-06-14 12:46:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:07,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:07,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:46:07,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:07,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 153108005, now seen corresponding path program 1 times [2024-06-14 12:46:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168327872] [2024-06-14 12:46:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:08,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:08,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168327872] [2024-06-14 12:46:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168327872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:08,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:08,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:46:08,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850243524] [2024-06-14 12:46:08,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:08,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:46:08,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:08,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:46:08,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:46:08,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:08,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:08,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:08,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:08,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:08,640 INFO L124 PetriNetUnfolderBase]: 1330/2019 cut-off events. [2024-06-14 12:46:08,640 INFO L125 PetriNetUnfolderBase]: For 4745/4745 co-relation queries the response was YES. [2024-06-14 12:46:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7062 conditions, 2019 events. 1330/2019 cut-off events. For 4745/4745 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9378 event pairs, 474 based on Foata normal form. 2/2021 useless extension candidates. Maximal degree in co-relation 7037. Up to 1987 conditions per place. [2024-06-14 12:46:08,653 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 60 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-14 12:46:08,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 514 flow [2024-06-14 12:46:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:46:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:46:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:46:08,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 12:46:08,654 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 324 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:46:08,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 514 flow [2024-06-14 12:46:08,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:08,660 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 337 flow [2024-06-14 12:46:08,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-14 12:46:08,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:46:08,661 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 337 flow [2024-06-14 12:46:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:08,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:08,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:46:08,662 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:08,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash 215433273, now seen corresponding path program 1 times [2024-06-14 12:46:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:08,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820135543] [2024-06-14 12:46:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:09,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820135543] [2024-06-14 12:46:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820135543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:09,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:09,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548008848] [2024-06-14 12:46:09,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:09,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:09,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:09,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:10,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:10,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 337 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:10,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:10,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:10,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:10,578 INFO L124 PetriNetUnfolderBase]: 1281/1989 cut-off events. [2024-06-14 12:46:10,578 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2024-06-14 12:46:10,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7243 conditions, 1989 events. 1281/1989 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9673 event pairs, 429 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 7216. Up to 1803 conditions per place. [2024-06-14 12:46:10,595 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 25 changer transitions 0/84 dead transitions. [2024-06-14 12:46:10,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 573 flow [2024-06-14 12:46:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 12:46:10,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-14 12:46:10,596 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 337 flow. Second operand 6 states and 118 transitions. [2024-06-14 12:46:10,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 573 flow [2024-06-14 12:46:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 567 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 12:46:10,623 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 429 flow [2024-06-14 12:46:10,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-14 12:46:10,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-14 12:46:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 429 flow [2024-06-14 12:46:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:46:10,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1161567413, now seen corresponding path program 2 times [2024-06-14 12:46:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447033446] [2024-06-14 12:46:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447033446] [2024-06-14 12:46:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447033446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:12,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115653086] [2024-06-14 12:46:12,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:12,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:12,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:12,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:12,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 429 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:12,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:12,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:12,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:12,845 INFO L124 PetriNetUnfolderBase]: 1394/2182 cut-off events. [2024-06-14 12:46:12,845 INFO L125 PetriNetUnfolderBase]: For 8144/8144 co-relation queries the response was YES. [2024-06-14 12:46:12,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8720 conditions, 2182 events. 1394/2182 cut-off events. For 8144/8144 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10797 event pairs, 427 based on Foata normal form. 4/2186 useless extension candidates. Maximal degree in co-relation 8690. Up to 1976 conditions per place. [2024-06-14 12:46:12,861 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 85 selfloop transitions, 34 changer transitions 0/125 dead transitions. [2024-06-14 12:46:12,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 125 transitions, 973 flow [2024-06-14 12:46:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:46:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:46:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-14 12:46:12,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-14 12:46:12,863 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 429 flow. Second operand 11 states and 200 transitions. [2024-06-14 12:46:12,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 125 transitions, 973 flow [2024-06-14 12:46:12,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 125 transitions, 895 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:12,871 INFO L231 Difference]: Finished difference. Result has 76 places, 92 transitions, 700 flow [2024-06-14 12:46:12,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=700, PETRI_PLACES=76, PETRI_TRANSITIONS=92} [2024-06-14 12:46:12,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 12:46:12,871 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 92 transitions, 700 flow [2024-06-14 12:46:12,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:12,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:12,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:46:12,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:12,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1502166057, now seen corresponding path program 3 times [2024-06-14 12:46:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:12,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481022977] [2024-06-14 12:46:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481022977] [2024-06-14 12:46:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481022977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:14,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:14,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922304514] [2024-06-14 12:46:14,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:14,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:14,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:14,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 92 transitions, 700 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:14,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:14,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:14,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:14,742 INFO L124 PetriNetUnfolderBase]: 1382/2162 cut-off events. [2024-06-14 12:46:14,743 INFO L125 PetriNetUnfolderBase]: For 11004/11008 co-relation queries the response was YES. [2024-06-14 12:46:14,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9386 conditions, 2162 events. 1382/2162 cut-off events. For 11004/11008 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10657 event pairs, 422 based on Foata normal form. 8/2170 useless extension candidates. Maximal degree in co-relation 9351. Up to 1874 conditions per place. [2024-06-14 12:46:14,759 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 42 changer transitions 0/117 dead transitions. [2024-06-14 12:46:14,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 117 transitions, 1044 flow [2024-06-14 12:46:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:46:14,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-14 12:46:14,761 INFO L175 Difference]: Start difference. First operand has 76 places, 92 transitions, 700 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:46:14,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 117 transitions, 1044 flow [2024-06-14 12:46:14,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 985 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:14,774 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 783 flow [2024-06-14 12:46:14,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-14 12:46:14,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 12:46:14,776 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 783 flow [2024-06-14 12:46:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:14,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:14,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:46:14,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 452245790, now seen corresponding path program 1 times [2024-06-14 12:46:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258773131] [2024-06-14 12:46:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:15,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:15,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258773131] [2024-06-14 12:46:15,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258773131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:15,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:15,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665812728] [2024-06-14 12:46:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:15,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:15,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:15,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 783 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:15,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:15,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:15,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:16,371 INFO L124 PetriNetUnfolderBase]: 1414/2233 cut-off events. [2024-06-14 12:46:16,372 INFO L125 PetriNetUnfolderBase]: For 14896/14897 co-relation queries the response was YES. [2024-06-14 12:46:16,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 2233 events. 1414/2233 cut-off events. For 14896/14897 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10989 event pairs, 436 based on Foata normal form. 28/2257 useless extension candidates. Maximal degree in co-relation 10245. Up to 1805 conditions per place. [2024-06-14 12:46:16,388 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 78 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2024-06-14 12:46:16,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 1173 flow [2024-06-14 12:46:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:46:16,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 12:46:16,390 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 783 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:46:16,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 1173 flow [2024-06-14 12:46:16,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 126 transitions, 1057 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:16,409 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 795 flow [2024-06-14 12:46:16,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=795, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-14 12:46:16,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-14 12:46:16,410 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 795 flow [2024-06-14 12:46:16,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:16,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:16,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:16,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:46:16,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:16,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:16,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1939763278, now seen corresponding path program 1 times [2024-06-14 12:46:16,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:16,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096826342] [2024-06-14 12:46:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:17,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:17,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096826342] [2024-06-14 12:46:17,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096826342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:17,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:17,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:17,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382329290] [2024-06-14 12:46:17,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:17,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:17,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:17,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:17,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:17,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:17,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 795 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:17,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:17,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:17,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:17,771 INFO L124 PetriNetUnfolderBase]: 1458/2288 cut-off events. [2024-06-14 12:46:17,771 INFO L125 PetriNetUnfolderBase]: For 13263/13263 co-relation queries the response was YES. [2024-06-14 12:46:17,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10305 conditions, 2288 events. 1458/2288 cut-off events. For 13263/13263 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11439 event pairs, 300 based on Foata normal form. 4/2291 useless extension candidates. Maximal degree in co-relation 10269. Up to 2082 conditions per place. [2024-06-14 12:46:17,786 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2024-06-14 12:46:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1093 flow [2024-06-14 12:46:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:46:17,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:46:17,788 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 795 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:46:17,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1093 flow [2024-06-14 12:46:17,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 116 transitions, 1011 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:17,806 INFO L231 Difference]: Finished difference. Result has 82 places, 99 transitions, 776 flow [2024-06-14 12:46:17,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=82, PETRI_TRANSITIONS=99} [2024-06-14 12:46:17,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-14 12:46:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 99 transitions, 776 flow [2024-06-14 12:46:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:17,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:17,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:17,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:46:17,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:17,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1657723726, now seen corresponding path program 2 times [2024-06-14 12:46:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:17,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827165295] [2024-06-14 12:46:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:17,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827165295] [2024-06-14 12:46:18,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827165295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:18,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:18,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776345046] [2024-06-14 12:46:18,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:18,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:18,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:18,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:18,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 99 transitions, 776 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:18,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:18,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:18,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:19,170 INFO L124 PetriNetUnfolderBase]: 1475/2313 cut-off events. [2024-06-14 12:46:19,170 INFO L125 PetriNetUnfolderBase]: For 14650/14650 co-relation queries the response was YES. [2024-06-14 12:46:19,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10504 conditions, 2313 events. 1475/2313 cut-off events. For 14650/14650 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11646 event pairs, 399 based on Foata normal form. 4/2316 useless extension candidates. Maximal degree in co-relation 10467. Up to 2101 conditions per place. [2024-06-14 12:46:19,182 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-14 12:46:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 1187 flow [2024-06-14 12:46:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 12:46:19,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 12:46:19,184 INFO L175 Difference]: Start difference. First operand has 82 places, 99 transitions, 776 flow. Second operand 6 states and 116 transitions. [2024-06-14 12:46:19,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 1187 flow [2024-06-14 12:46:19,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1142 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:19,200 INFO L231 Difference]: Finished difference. Result has 85 places, 108 transitions, 926 flow [2024-06-14 12:46:19,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=926, PETRI_PLACES=85, PETRI_TRANSITIONS=108} [2024-06-14 12:46:19,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 12:46:19,201 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 108 transitions, 926 flow [2024-06-14 12:46:19,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:19,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:19,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:19,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:46:19,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:19,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1170859604, now seen corresponding path program 3 times [2024-06-14 12:46:19,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:19,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101072173] [2024-06-14 12:46:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:19,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:20,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:20,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101072173] [2024-06-14 12:46:20,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101072173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:20,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:20,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:46:20,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135270938] [2024-06-14 12:46:20,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:46:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:46:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:46:20,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:20,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 108 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:20,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:20,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:20,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:20,576 INFO L124 PetriNetUnfolderBase]: 1467/2305 cut-off events. [2024-06-14 12:46:20,577 INFO L125 PetriNetUnfolderBase]: For 17109/17113 co-relation queries the response was YES. [2024-06-14 12:46:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10862 conditions, 2305 events. 1467/2305 cut-off events. For 17109/17113 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11627 event pairs, 390 based on Foata normal form. 8/2313 useless extension candidates. Maximal degree in co-relation 10823. Up to 2083 conditions per place. [2024-06-14 12:46:20,591 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 94 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-14 12:46:20,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 1286 flow [2024-06-14 12:46:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:46:20,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 12:46:20,592 INFO L175 Difference]: Start difference. First operand has 85 places, 108 transitions, 926 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:46:20,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 1286 flow [2024-06-14 12:46:20,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 1197 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:20,615 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 945 flow [2024-06-14 12:46:20,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=945, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2024-06-14 12:46:20,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 12:46:20,615 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 945 flow [2024-06-14 12:46:20,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:20,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:20,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:20,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:46:20,616 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:20,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1342611946, now seen corresponding path program 1 times [2024-06-14 12:46:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:20,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995976438] [2024-06-14 12:46:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:20,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995976438] [2024-06-14 12:46:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995976438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:21,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306075886] [2024-06-14 12:46:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:21,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:21,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:21,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:21,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:21,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:21,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:21,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:21,703 INFO L124 PetriNetUnfolderBase]: 1568/2418 cut-off events. [2024-06-14 12:46:21,703 INFO L125 PetriNetUnfolderBase]: For 19564/19564 co-relation queries the response was YES. [2024-06-14 12:46:21,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11530 conditions, 2418 events. 1568/2418 cut-off events. For 19564/19564 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11824 event pairs, 438 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 11490. Up to 2293 conditions per place. [2024-06-14 12:46:21,715 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-14 12:46:21,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1251 flow [2024-06-14 12:46:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:46:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:46:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:46:21,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-14 12:46:21,718 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 945 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:46:21,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1251 flow [2024-06-14 12:46:21,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 1159 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:21,743 INFO L231 Difference]: Finished difference. Result has 89 places, 113 transitions, 931 flow [2024-06-14 12:46:21,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=931, PETRI_PLACES=89, PETRI_TRANSITIONS=113} [2024-06-14 12:46:21,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 12:46:21,744 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 113 transitions, 931 flow [2024-06-14 12:46:21,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:21,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:21,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:21,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:46:21,744 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:21,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2106512106, now seen corresponding path program 2 times [2024-06-14 12:46:21,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472071984] [2024-06-14 12:46:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:21,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472071984] [2024-06-14 12:46:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472071984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346431069] [2024-06-14 12:46:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:22,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:22,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:22,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:22,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 113 transitions, 931 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:22,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:22,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:22,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:22,869 INFO L124 PetriNetUnfolderBase]: 1556/2402 cut-off events. [2024-06-14 12:46:22,869 INFO L125 PetriNetUnfolderBase]: For 20782/20782 co-relation queries the response was YES. [2024-06-14 12:46:22,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11723 conditions, 2402 events. 1556/2402 cut-off events. For 20782/20782 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11728 event pairs, 436 based on Foata normal form. 4/2405 useless extension candidates. Maximal degree in co-relation 11682. Up to 2261 conditions per place. [2024-06-14 12:46:22,883 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 105 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-06-14 12:46:22,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1273 flow [2024-06-14 12:46:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:46:22,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:46:22,885 INFO L175 Difference]: Start difference. First operand has 89 places, 113 transitions, 931 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:46:22,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1273 flow [2024-06-14 12:46:22,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 129 transitions, 1227 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:22,911 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 969 flow [2024-06-14 12:46:22,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=969, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2024-06-14 12:46:22,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:46:22,912 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 969 flow [2024-06-14 12:46:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:22,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:22,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:46:22,913 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:22,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1879240980, now seen corresponding path program 1 times [2024-06-14 12:46:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542278331] [2024-06-14 12:46:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542278331] [2024-06-14 12:46:23,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542278331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048150417] [2024-06-14 12:46:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:23,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:23,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:23,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:23,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:23,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:23,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:23,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:23,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:23,935 INFO L124 PetriNetUnfolderBase]: 1574/2429 cut-off events. [2024-06-14 12:46:23,935 INFO L125 PetriNetUnfolderBase]: For 20981/20981 co-relation queries the response was YES. [2024-06-14 12:46:23,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11939 conditions, 2429 events. 1574/2429 cut-off events. For 20981/20981 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11833 event pairs, 448 based on Foata normal form. 2/2431 useless extension candidates. Maximal degree in co-relation 11897. Up to 2340 conditions per place. [2024-06-14 12:46:23,947 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 15 changer transitions 0/142 dead transitions. [2024-06-14 12:46:23,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 142 transitions, 1401 flow [2024-06-14 12:46:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:46:23,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:46:23,949 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 969 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:46:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 142 transitions, 1401 flow [2024-06-14 12:46:23,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 1344 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:23,975 INFO L231 Difference]: Finished difference. Result has 96 places, 127 transitions, 1061 flow [2024-06-14 12:46:23,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1061, PETRI_PLACES=96, PETRI_TRANSITIONS=127} [2024-06-14 12:46:23,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-14 12:46:23,975 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 127 transitions, 1061 flow [2024-06-14 12:46:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:23,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:23,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:46:23,976 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:23,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1915429140, now seen corresponding path program 2 times [2024-06-14 12:46:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:23,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278679747] [2024-06-14 12:46:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:24,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278679747] [2024-06-14 12:46:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278679747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:24,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:24,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:24,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831085218] [2024-06-14 12:46:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:24,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:24,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:24,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:24,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:24,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 127 transitions, 1061 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:24,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:24,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:24,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:24,987 INFO L124 PetriNetUnfolderBase]: 1568/2419 cut-off events. [2024-06-14 12:46:24,988 INFO L125 PetriNetUnfolderBase]: For 22870/22870 co-relation queries the response was YES. [2024-06-14 12:46:24,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 2419 events. 1568/2419 cut-off events. For 22870/22870 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11790 event pairs, 448 based on Foata normal form. 2/2421 useless extension candidates. Maximal degree in co-relation 12336. Up to 2350 conditions per place. [2024-06-14 12:46:24,999 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2024-06-14 12:46:25,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1368 flow [2024-06-14 12:46:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:46:25,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-14 12:46:25,001 INFO L175 Difference]: Start difference. First operand has 96 places, 127 transitions, 1061 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:46:25,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1368 flow [2024-06-14 12:46:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1334 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-14 12:46:25,030 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1064 flow [2024-06-14 12:46:25,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1064, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-14 12:46:25,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 12:46:25,031 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1064 flow [2024-06-14 12:46:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:25,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:25,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:25,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:46:25,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:25,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2106497226, now seen corresponding path program 1 times [2024-06-14 12:46:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:25,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263635814] [2024-06-14 12:46:25,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:25,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263635814] [2024-06-14 12:46:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263635814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:25,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:25,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:46:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254738246] [2024-06-14 12:46:25,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:25,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:46:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:46:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:46:25,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:25,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1064 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-14 12:46:25,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:25,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:25,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:26,239 INFO L124 PetriNetUnfolderBase]: 1563/2412 cut-off events. [2024-06-14 12:46:26,239 INFO L125 PetriNetUnfolderBase]: For 24303/24303 co-relation queries the response was YES. [2024-06-14 12:46:26,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12464 conditions, 2412 events. 1563/2412 cut-off events. For 24303/24303 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11696 event pairs, 447 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 12416. Up to 2340 conditions per place. [2024-06-14 12:46:26,252 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 124 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-06-14 12:46:26,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 1382 flow [2024-06-14 12:46:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:46:26,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-14 12:46:26,254 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1064 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:46:26,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 1382 flow [2024-06-14 12:46:26,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1360 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:26,284 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1091 flow [2024-06-14 12:46:26,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1091, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-14 12:46:26,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-14 12:46:26,285 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1091 flow [2024-06-14 12:46:26,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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) [2024-06-14 12:46:26,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:26,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:26,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:46:26,285 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:26,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash -306647890, now seen corresponding path program 1 times [2024-06-14 12:46:26,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:26,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169004324] [2024-06-14 12:46:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:26,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:27,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:27,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169004324] [2024-06-14 12:46:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169004324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:27,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:27,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85508612] [2024-06-14 12:46:27,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:27,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:27,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:27,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1091 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:27,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:27,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:27,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:27,918 INFO L124 PetriNetUnfolderBase]: 1565/2464 cut-off events. [2024-06-14 12:46:27,918 INFO L125 PetriNetUnfolderBase]: For 29287/29287 co-relation queries the response was YES. [2024-06-14 12:46:27,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13083 conditions, 2464 events. 1565/2464 cut-off events. For 29287/29287 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12391 event pairs, 286 based on Foata normal form. 16/2479 useless extension candidates. Maximal degree in co-relation 13035. Up to 2164 conditions per place. [2024-06-14 12:46:27,930 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-14 12:46:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 156 transitions, 1501 flow [2024-06-14 12:46:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:46:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:46:27,932 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1091 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:46:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 156 transitions, 1501 flow [2024-06-14 12:46:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1468 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:27,961 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1122 flow [2024-06-14 12:46:27,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1122, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2024-06-14 12:46:27,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 12:46:27,961 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1122 flow [2024-06-14 12:46:27,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:27,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:27,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:27,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:46:27,962 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:27,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash -746576760, now seen corresponding path program 2 times [2024-06-14 12:46:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415480167] [2024-06-14 12:46:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:29,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415480167] [2024-06-14 12:46:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415480167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:29,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:29,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250312462] [2024-06-14 12:46:29,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:29,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:29,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:29,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1122 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:29,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:29,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:29,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:29,756 INFO L124 PetriNetUnfolderBase]: 1626/2591 cut-off events. [2024-06-14 12:46:29,756 INFO L125 PetriNetUnfolderBase]: For 32943/32943 co-relation queries the response was YES. [2024-06-14 12:46:29,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 2591 events. 1626/2591 cut-off events. For 32943/32943 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13422 event pairs, 364 based on Foata normal form. 22/2612 useless extension candidates. Maximal degree in co-relation 13804. Up to 1923 conditions per place. [2024-06-14 12:46:29,772 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 58 changer transitions 0/161 dead transitions. [2024-06-14 12:46:29,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1622 flow [2024-06-14 12:46:29,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:46:29,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-14 12:46:29,773 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1122 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:46:29,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1622 flow [2024-06-14 12:46:29,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 161 transitions, 1578 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:29,807 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1324 flow [2024-06-14 12:46:29,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2024-06-14 12:46:29,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 12:46:29,808 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1324 flow [2024-06-14 12:46:29,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:29,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:29,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:29,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:46:29,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:29,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash -746724630, now seen corresponding path program 3 times [2024-06-14 12:46:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:29,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862309577] [2024-06-14 12:46:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:29,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:30,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:30,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862309577] [2024-06-14 12:46:30,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862309577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:30,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:30,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461592272] [2024-06-14 12:46:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:30,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:30,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1324 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:30,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:30,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:30,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:31,462 INFO L124 PetriNetUnfolderBase]: 1695/2714 cut-off events. [2024-06-14 12:46:31,462 INFO L125 PetriNetUnfolderBase]: For 41047/41047 co-relation queries the response was YES. [2024-06-14 12:46:31,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15380 conditions, 2714 events. 1695/2714 cut-off events. For 41047/41047 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14287 event pairs, 389 based on Foata normal form. 16/2729 useless extension candidates. Maximal degree in co-relation 15329. Up to 2317 conditions per place. [2024-06-14 12:46:31,477 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 115 selfloop transitions, 39 changer transitions 0/160 dead transitions. [2024-06-14 12:46:31,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1746 flow [2024-06-14 12:46:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:46:31,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-14 12:46:31,479 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1324 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:46:31,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1746 flow [2024-06-14 12:46:31,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 160 transitions, 1669 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:31,540 INFO L231 Difference]: Finished difference. Result has 113 places, 136 transitions, 1362 flow [2024-06-14 12:46:31,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1362, PETRI_PLACES=113, PETRI_TRANSITIONS=136} [2024-06-14 12:46:31,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 12:46:31,541 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 136 transitions, 1362 flow [2024-06-14 12:46:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:31,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:31,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:46:31,541 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1942420548, now seen corresponding path program 4 times [2024-06-14 12:46:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:31,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692404390] [2024-06-14 12:46:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:32,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:32,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692404390] [2024-06-14 12:46:32,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692404390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:32,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:32,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121760664] [2024-06-14 12:46:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:32,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:46:32,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 136 transitions, 1362 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:32,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:32,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:46:32,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:33,437 INFO L124 PetriNetUnfolderBase]: 1752/2812 cut-off events. [2024-06-14 12:46:33,438 INFO L125 PetriNetUnfolderBase]: For 45896/45900 co-relation queries the response was YES. [2024-06-14 12:46:33,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 2812 events. 1752/2812 cut-off events. For 45896/45900 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15059 event pairs, 404 based on Foata normal form. 30/2842 useless extension candidates. Maximal degree in co-relation 15973. Up to 2290 conditions per place. [2024-06-14 12:46:33,453 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 60 changer transitions 0/174 dead transitions. [2024-06-14 12:46:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 2040 flow [2024-06-14 12:46:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:46:33,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 12:46:33,457 INFO L175 Difference]: Start difference. First operand has 113 places, 136 transitions, 1362 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:46:33,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 2040 flow [2024-06-14 12:46:33,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 174 transitions, 1947 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:33,510 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1608 flow [2024-06-14 12:46:33,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-14 12:46:33,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-14 12:46:33,510 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1608 flow [2024-06-14 12:46:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:33,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:33,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:46:33,511 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:33,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 195146950, now seen corresponding path program 1 times [2024-06-14 12:46:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594031480] [2024-06-14 12:46:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:34,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:34,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594031480] [2024-06-14 12:46:34,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594031480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:34,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:34,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:46:34,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443540808] [2024-06-14 12:46:34,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:34,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:46:34,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:46:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:46:35,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:35,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1608 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:35,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:35,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:35,674 INFO L124 PetriNetUnfolderBase]: 1902/2987 cut-off events. [2024-06-14 12:46:35,674 INFO L125 PetriNetUnfolderBase]: For 51306/51310 co-relation queries the response was YES. [2024-06-14 12:46:35,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17922 conditions, 2987 events. 1902/2987 cut-off events. For 51306/51310 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15566 event pairs, 462 based on Foata normal form. 6/2993 useless extension candidates. Maximal degree in co-relation 17866. Up to 2652 conditions per place. [2024-06-14 12:46:35,694 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 120 selfloop transitions, 63 changer transitions 0/187 dead transitions. [2024-06-14 12:46:35,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 2254 flow [2024-06-14 12:46:35,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:46:35,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:46:35,695 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1608 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:46:35,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 2254 flow [2024-06-14 12:46:35,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 187 transitions, 2158 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:35,772 INFO L231 Difference]: Finished difference. Result has 125 places, 158 transitions, 1843 flow [2024-06-14 12:46:35,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=125, PETRI_TRANSITIONS=158} [2024-06-14 12:46:35,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 12:46:35,773 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 158 transitions, 1843 flow [2024-06-14 12:46:35,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:35,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:35,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:46:35,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:35,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 194945140, now seen corresponding path program 2 times [2024-06-14 12:46:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:35,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748944538] [2024-06-14 12:46:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:37,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:37,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748944538] [2024-06-14 12:46:37,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748944538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:37,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:37,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:46:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384820117] [2024-06-14 12:46:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:37,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:46:37,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:46:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:46:37,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:37,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 158 transitions, 1843 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:37,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:37,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:37,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:38,092 INFO L124 PetriNetUnfolderBase]: 1897/2980 cut-off events. [2024-06-14 12:46:38,092 INFO L125 PetriNetUnfolderBase]: For 52589/52593 co-relation queries the response was YES. [2024-06-14 12:46:38,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18173 conditions, 2980 events. 1897/2980 cut-off events. For 52589/52593 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15516 event pairs, 462 based on Foata normal form. 6/2986 useless extension candidates. Maximal degree in co-relation 18114. Up to 2645 conditions per place. [2024-06-14 12:46:38,114 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 118 selfloop transitions, 64 changer transitions 0/186 dead transitions. [2024-06-14 12:46:38,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 2309 flow [2024-06-14 12:46:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:46:38,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:46:38,116 INFO L175 Difference]: Start difference. First operand has 125 places, 158 transitions, 1843 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:46:38,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 2309 flow [2024-06-14 12:46:38,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 2148 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:38,214 INFO L231 Difference]: Finished difference. Result has 130 places, 158 transitions, 1819 flow [2024-06-14 12:46:38,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=130, PETRI_TRANSITIONS=158} [2024-06-14 12:46:38,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 12:46:38,215 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 158 transitions, 1819 flow [2024-06-14 12:46:38,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:38,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:38,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:46:38,215 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)] === [2024-06-14 12:46:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash -220351594, now seen corresponding path program 1 times [2024-06-14 12:46:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112527403] [2024-06-14 12:46:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112527403] [2024-06-14 12:46:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112527403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:39,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:39,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268888992] [2024-06-14 12:46:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:39,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:39,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 158 transitions, 1819 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:39,531 INFO L124 PetriNetUnfolderBase]: 1915/3003 cut-off events. [2024-06-14 12:46:39,531 INFO L125 PetriNetUnfolderBase]: For 56056/56056 co-relation queries the response was YES. [2024-06-14 12:46:39,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18291 conditions, 3003 events. 1915/3003 cut-off events. For 56056/56056 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15569 event pairs, 494 based on Foata normal form. 2/3005 useless extension candidates. Maximal degree in co-relation 18231. Up to 2872 conditions per place. [2024-06-14 12:46:39,553 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 23 changer transitions 0/186 dead transitions. [2024-06-14 12:46:39,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 186 transitions, 2366 flow [2024-06-14 12:46:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:46:39,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:46:39,555 INFO L175 Difference]: Start difference. First operand has 130 places, 158 transitions, 1819 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:46:39,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 186 transitions, 2366 flow [2024-06-14 12:46:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 2146 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 12:46:39,631 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1736 flow [2024-06-14 12:46:39,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-14 12:46:39,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-14 12:46:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1736 flow [2024-06-14 12:46:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:39,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:46:39,632 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:39,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash -220201864, now seen corresponding path program 2 times [2024-06-14 12:46:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:39,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27603286] [2024-06-14 12:46:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:39,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:40,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27603286] [2024-06-14 12:46:40,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27603286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:40,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:40,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:40,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848305199] [2024-06-14 12:46:40,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:40,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:40,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:40,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:40,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1736 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:40,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:40,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:40,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:41,018 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-14 12:46:41,018 INFO L125 PetriNetUnfolderBase]: For 59158/59158 co-relation queries the response was YES. [2024-06-14 12:46:41,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18481 conditions, 3017 events. 1925/3017 cut-off events. For 59158/59158 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15655 event pairs, 485 based on Foata normal form. 2/3019 useless extension candidates. Maximal degree in co-relation 18420. Up to 2908 conditions per place. [2024-06-14 12:46:41,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 19 changer transitions 0/185 dead transitions. [2024-06-14 12:46:41,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 185 transitions, 2181 flow [2024-06-14 12:46:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:46:41,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:46:41,042 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1736 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:46:41,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 185 transitions, 2181 flow [2024-06-14 12:46:41,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 2135 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:41,136 INFO L231 Difference]: Finished difference. Result has 133 places, 169 transitions, 1769 flow [2024-06-14 12:46:41,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1769, PETRI_PLACES=133, PETRI_TRANSITIONS=169} [2024-06-14 12:46:41,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 12:46:41,137 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 169 transitions, 1769 flow [2024-06-14 12:46:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:41,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:41,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:46:41,137 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:41,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash 231052735, now seen corresponding path program 1 times [2024-06-14 12:46:41,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:41,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396735374] [2024-06-14 12:46:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:41,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:41,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396735374] [2024-06-14 12:46:41,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396735374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:41,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:41,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:41,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740660528] [2024-06-14 12:46:41,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:41,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:41,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:41,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:41,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:41,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 169 transitions, 1769 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:41,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:41,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:41,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:42,342 INFO L124 PetriNetUnfolderBase]: 1922/3013 cut-off events. [2024-06-14 12:46:42,342 INFO L125 PetriNetUnfolderBase]: For 63075/63075 co-relation queries the response was YES. [2024-06-14 12:46:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18601 conditions, 3013 events. 1922/3013 cut-off events. For 63075/63075 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15696 event pairs, 485 based on Foata normal form. 1/3014 useless extension candidates. Maximal degree in co-relation 18538. Up to 2921 conditions per place. [2024-06-14 12:46:42,364 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-14 12:46:42,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 182 transitions, 2189 flow [2024-06-14 12:46:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:46:42,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:46:42,366 INFO L175 Difference]: Start difference. First operand has 133 places, 169 transitions, 1769 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:46:42,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 182 transitions, 2189 flow [2024-06-14 12:46:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 2147 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:42,443 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 1807 flow [2024-06-14 12:46:42,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1807, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-06-14 12:46:42,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 12:46:42,444 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 1807 flow [2024-06-14 12:46:42,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:42,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:42,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:46:42,444 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:42,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -877180122, now seen corresponding path program 3 times [2024-06-14 12:46:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992959374] [2024-06-14 12:46:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992959374] [2024-06-14 12:46:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992959374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:43,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:43,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678682944] [2024-06-14 12:46:43,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:43,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:43,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:43,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:43,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 1807 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:43,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:43,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:43,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:43,734 INFO L124 PetriNetUnfolderBase]: 1916/3005 cut-off events. [2024-06-14 12:46:43,734 INFO L125 PetriNetUnfolderBase]: For 64903/64903 co-relation queries the response was YES. [2024-06-14 12:46:43,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18867 conditions, 3005 events. 1916/3005 cut-off events. For 64903/64903 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15591 event pairs, 484 based on Foata normal form. 2/3007 useless extension candidates. Maximal degree in co-relation 18803. Up to 2911 conditions per place. [2024-06-14 12:46:43,755 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 14 changer transitions 0/185 dead transitions. [2024-06-14 12:46:43,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 185 transitions, 2216 flow [2024-06-14 12:46:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:46:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:46:43,756 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 1807 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:46:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 185 transitions, 2216 flow [2024-06-14 12:46:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 2168 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:43,915 INFO L231 Difference]: Finished difference. Result has 137 places, 173 transitions, 1804 flow [2024-06-14 12:46:43,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=137, PETRI_TRANSITIONS=173} [2024-06-14 12:46:43,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-14 12:46:43,916 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 173 transitions, 1804 flow [2024-06-14 12:46:43,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:43,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:43,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:43,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:46:43,916 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:43,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2130847683, now seen corresponding path program 1 times [2024-06-14 12:46:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:43,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105560922] [2024-06-14 12:46:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105560922] [2024-06-14 12:46:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105560922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:44,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:44,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:44,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461629993] [2024-06-14 12:46:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:44,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:44,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:44,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:44,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 173 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:44,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:44,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:44,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:45,134 INFO L124 PetriNetUnfolderBase]: 1990/3120 cut-off events. [2024-06-14 12:46:45,134 INFO L125 PetriNetUnfolderBase]: For 72191/72195 co-relation queries the response was YES. [2024-06-14 12:46:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19833 conditions, 3120 events. 1990/3120 cut-off events. For 72191/72195 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16283 event pairs, 464 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 19768. Up to 2890 conditions per place. [2024-06-14 12:46:45,153 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 49 changer transitions 0/206 dead transitions. [2024-06-14 12:46:45,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 206 transitions, 2545 flow [2024-06-14 12:46:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:46:45,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:46:45,154 INFO L175 Difference]: Start difference. First operand has 137 places, 173 transitions, 1804 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:46:45,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 206 transitions, 2545 flow [2024-06-14 12:46:45,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 2513 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:45,245 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 2142 flow [2024-06-14 12:46:45,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2142, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-14 12:46:45,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 12:46:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 2142 flow [2024-06-14 12:46:45,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:45,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:45,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:46:45,246 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash -750755145, now seen corresponding path program 2 times [2024-06-14 12:46:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024330279] [2024-06-14 12:46:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024330279] [2024-06-14 12:46:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024330279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:45,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:45,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556548081] [2024-06-14 12:46:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:45,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:45,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 2142 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:45,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:45,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:45,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:46,440 INFO L124 PetriNetUnfolderBase]: 1978/3104 cut-off events. [2024-06-14 12:46:46,441 INFO L125 PetriNetUnfolderBase]: For 77183/77187 co-relation queries the response was YES. [2024-06-14 12:46:46,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20513 conditions, 3104 events. 1978/3104 cut-off events. For 77183/77187 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16150 event pairs, 462 based on Foata normal form. 8/3112 useless extension candidates. Maximal degree in co-relation 20445. Up to 2968 conditions per place. [2024-06-14 12:46:46,462 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-14 12:46:46,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 198 transitions, 2580 flow [2024-06-14 12:46:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:46:46,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:46:46,463 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 2142 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:46:46,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 198 transitions, 2580 flow [2024-06-14 12:46:46,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2487 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:46,611 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 2103 flow [2024-06-14 12:46:46,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2103, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-14 12:46:46,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 12:46:46,612 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 2103 flow [2024-06-14 12:46:46,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:46,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:46,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:46,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:46:46,613 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:46,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash 92175511, now seen corresponding path program 1 times [2024-06-14 12:46:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601498101] [2024-06-14 12:46:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:46,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:47,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601498101] [2024-06-14 12:46:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601498101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:47,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:47,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:46:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50466462] [2024-06-14 12:46:47,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:46:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:46:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:46:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:48,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 2103 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:48,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:48,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:48,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:48,774 INFO L124 PetriNetUnfolderBase]: 2162/3412 cut-off events. [2024-06-14 12:46:48,774 INFO L125 PetriNetUnfolderBase]: For 86456/86456 co-relation queries the response was YES. [2024-06-14 12:46:48,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22362 conditions, 3412 events. 2162/3412 cut-off events. For 86456/86456 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18236 event pairs, 469 based on Foata normal form. 12/3423 useless extension candidates. Maximal degree in co-relation 22293. Up to 2402 conditions per place. [2024-06-14 12:46:48,801 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 138 selfloop transitions, 96 changer transitions 0/238 dead transitions. [2024-06-14 12:46:48,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 238 transitions, 3029 flow [2024-06-14 12:46:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:46:48,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-14 12:46:48,803 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 2103 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:46:48,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 238 transitions, 3029 flow [2024-06-14 12:46:48,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 238 transitions, 2989 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:48,930 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2456 flow [2024-06-14 12:46:48,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2456, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-14 12:46:48,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 12:46:48,932 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2456 flow [2024-06-14 12:46:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:48,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:48,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:48,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:46:48,932 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:48,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 413278521, now seen corresponding path program 2 times [2024-06-14 12:46:48,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:48,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694777548] [2024-06-14 12:46:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:48,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694777548] [2024-06-14 12:46:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694777548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:50,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:46:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139802669] [2024-06-14 12:46:50,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:46:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:46:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:46:50,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:50,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2456 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:50,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:50,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:51,480 INFO L124 PetriNetUnfolderBase]: 2278/3614 cut-off events. [2024-06-14 12:46:51,481 INFO L125 PetriNetUnfolderBase]: For 102890/102894 co-relation queries the response was YES. [2024-06-14 12:46:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24490 conditions, 3614 events. 2278/3614 cut-off events. For 102890/102894 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19906 event pairs, 536 based on Foata normal form. 32/3646 useless extension candidates. Maximal degree in co-relation 24418. Up to 3065 conditions per place. [2024-06-14 12:46:51,510 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 158 selfloop transitions, 73 changer transitions 0/235 dead transitions. [2024-06-14 12:46:51,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 235 transitions, 3177 flow [2024-06-14 12:46:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:46:51,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 12:46:51,512 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2456 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:46:51,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 235 transitions, 3177 flow [2024-06-14 12:46:51,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 235 transitions, 3101 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:51,673 INFO L231 Difference]: Finished difference. Result has 159 places, 198 transitions, 2631 flow [2024-06-14 12:46:51,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=159, PETRI_TRANSITIONS=198} [2024-06-14 12:46:51,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 12:46:51,674 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 198 transitions, 2631 flow [2024-06-14 12:46:51,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:51,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:51,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:51,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:46:51,675 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:51,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1748333079, now seen corresponding path program 3 times [2024-06-14 12:46:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:51,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842985027] [2024-06-14 12:46:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:53,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842985027] [2024-06-14 12:46:53,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842985027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:53,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:53,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:46:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247900542] [2024-06-14 12:46:53,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:46:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:46:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:46:53,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 198 transitions, 2631 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:55,006 INFO L124 PetriNetUnfolderBase]: 2308/3668 cut-off events. [2024-06-14 12:46:55,006 INFO L125 PetriNetUnfolderBase]: For 104269/104273 co-relation queries the response was YES. [2024-06-14 12:46:55,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24671 conditions, 3668 events. 2308/3668 cut-off events. For 104269/104273 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20274 event pairs, 540 based on Foata normal form. 32/3700 useless extension candidates. Maximal degree in co-relation 24597. Up to 3119 conditions per place. [2024-06-14 12:46:55,037 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 73 changer transitions 0/237 dead transitions. [2024-06-14 12:46:55,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 237 transitions, 3325 flow [2024-06-14 12:46:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:46:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:46:55,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:46:55,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 12:46:55,039 INFO L175 Difference]: Start difference. First operand has 159 places, 198 transitions, 2631 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:46:55,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 237 transitions, 3325 flow [2024-06-14 12:46:55,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 237 transitions, 3142 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 12:46:55,222 INFO L231 Difference]: Finished difference. Result has 161 places, 200 transitions, 2666 flow [2024-06-14 12:46:55,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2666, PETRI_PLACES=161, PETRI_TRANSITIONS=200} [2024-06-14 12:46:55,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 12:46:55,222 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 200 transitions, 2666 flow [2024-06-14 12:46:55,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:55,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:55,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:46:55,222 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:55,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1759845547, now seen corresponding path program 1 times [2024-06-14 12:46:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:55,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984428172] [2024-06-14 12:46:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:56,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984428172] [2024-06-14 12:46:56,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984428172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:56,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:56,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790409420] [2024-06-14 12:46:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:56,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:56,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 200 transitions, 2666 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:56,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:56,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:56,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:56,844 INFO L124 PetriNetUnfolderBase]: 2352/3736 cut-off events. [2024-06-14 12:46:56,845 INFO L125 PetriNetUnfolderBase]: For 102521/102521 co-relation queries the response was YES. [2024-06-14 12:46:56,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24920 conditions, 3736 events. 2352/3736 cut-off events. For 102521/102521 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20730 event pairs, 551 based on Foata normal form. 12/3747 useless extension candidates. Maximal degree in co-relation 24845. Up to 3527 conditions per place. [2024-06-14 12:46:56,877 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 191 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2024-06-14 12:46:56,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 218 transitions, 3222 flow [2024-06-14 12:46:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:46:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:46:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:46:56,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:46:56,878 INFO L175 Difference]: Start difference. First operand has 161 places, 200 transitions, 2666 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:46:56,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 218 transitions, 3222 flow [2024-06-14 12:46:57,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 218 transitions, 3057 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:46:57,069 INFO L231 Difference]: Finished difference. Result has 159 places, 201 transitions, 2569 flow [2024-06-14 12:46:57,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2569, PETRI_PLACES=159, PETRI_TRANSITIONS=201} [2024-06-14 12:46:57,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 12:46:57,070 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 201 transitions, 2569 flow [2024-06-14 12:46:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:57,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:57,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:46:57,070 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:57,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2051968179, now seen corresponding path program 3 times [2024-06-14 12:46:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:57,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641326421] [2024-06-14 12:46:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:57,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641326421] [2024-06-14 12:46:57,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641326421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:57,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:57,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301968581] [2024-06-14 12:46:57,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:57,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:57,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:57,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:57,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 201 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:57,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:57,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:57,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:58,442 INFO L124 PetriNetUnfolderBase]: 2372/3764 cut-off events. [2024-06-14 12:46:58,442 INFO L125 PetriNetUnfolderBase]: For 101494/101498 co-relation queries the response was YES. [2024-06-14 12:46:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 3764 events. 2372/3764 cut-off events. For 101494/101498 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20901 event pairs, 554 based on Foata normal form. 8/3772 useless extension candidates. Maximal degree in co-relation 24901. Up to 3570 conditions per place. [2024-06-14 12:46:58,471 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 39 changer transitions 0/223 dead transitions. [2024-06-14 12:46:58,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 223 transitions, 3147 flow [2024-06-14 12:46:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:46:58,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 12:46:58,472 INFO L175 Difference]: Start difference. First operand has 159 places, 201 transitions, 2569 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:46:58,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 223 transitions, 3147 flow [2024-06-14 12:46:58,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 223 transitions, 3105 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:58,668 INFO L231 Difference]: Finished difference. Result has 162 places, 204 transitions, 2674 flow [2024-06-14 12:46:58,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2674, PETRI_PLACES=162, PETRI_TRANSITIONS=204} [2024-06-14 12:46:58,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 12:46:58,668 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 204 transitions, 2674 flow [2024-06-14 12:46:58,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:58,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:58,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:46:58,669 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:58,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2064348339, now seen corresponding path program 4 times [2024-06-14 12:46:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21362167] [2024-06-14 12:46:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:58,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21362167] [2024-06-14 12:46:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21362167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:46:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231045683] [2024-06-14 12:46:59,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:59,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:46:59,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:46:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:46:59,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:46:59,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 204 transitions, 2674 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:59,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:59,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:46:59,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:59,948 INFO L124 PetriNetUnfolderBase]: 2416/3835 cut-off events. [2024-06-14 12:46:59,948 INFO L125 PetriNetUnfolderBase]: For 110250/110254 co-relation queries the response was YES. [2024-06-14 12:46:59,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26088 conditions, 3835 events. 2416/3835 cut-off events. For 110250/110254 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21411 event pairs, 559 based on Foata normal form. 8/3843 useless extension candidates. Maximal degree in co-relation 26011. Up to 3526 conditions per place. [2024-06-14 12:46:59,978 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 60 changer transitions 0/233 dead transitions. [2024-06-14 12:46:59,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 233 transitions, 3460 flow [2024-06-14 12:46:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:46:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:46:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:46:59,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-14 12:46:59,979 INFO L175 Difference]: Start difference. First operand has 162 places, 204 transitions, 2674 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:46:59,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 233 transitions, 3460 flow [2024-06-14 12:47:00,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 233 transitions, 3285 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:00,233 INFO L231 Difference]: Finished difference. Result has 165 places, 213 transitions, 2801 flow [2024-06-14 12:47:00,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2801, PETRI_PLACES=165, PETRI_TRANSITIONS=213} [2024-06-14 12:47:00,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 12:47:00,234 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 213 transitions, 2801 flow [2024-06-14 12:47:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:00,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:00,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:47:00,234 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:00,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1433257787, now seen corresponding path program 5 times [2024-06-14 12:47:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:00,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139841471] [2024-06-14 12:47:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:00,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:00,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:00,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139841471] [2024-06-14 12:47:00,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139841471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:00,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:00,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:47:00,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938205827] [2024-06-14 12:47:00,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:00,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:47:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:00,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:47:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:47:00,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 213 transitions, 2801 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:00,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:00,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:00,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:01,561 INFO L124 PetriNetUnfolderBase]: 2436/3867 cut-off events. [2024-06-14 12:47:01,561 INFO L125 PetriNetUnfolderBase]: For 118283/118287 co-relation queries the response was YES. [2024-06-14 12:47:01,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26918 conditions, 3867 events. 2436/3867 cut-off events. For 118283/118287 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21597 event pairs, 568 based on Foata normal form. 8/3875 useless extension candidates. Maximal degree in co-relation 26840. Up to 3722 conditions per place. [2024-06-14 12:47:01,591 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 22 changer transitions 0/228 dead transitions. [2024-06-14 12:47:01,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 228 transitions, 3373 flow [2024-06-14 12:47:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:47:01,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:47:01,592 INFO L175 Difference]: Start difference. First operand has 165 places, 213 transitions, 2801 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:47:01,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 228 transitions, 3373 flow [2024-06-14 12:47:01,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 228 transitions, 3274 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:47:01,819 INFO L231 Difference]: Finished difference. Result has 169 places, 216 transitions, 2826 flow [2024-06-14 12:47:01,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2826, PETRI_PLACES=169, PETRI_TRANSITIONS=216} [2024-06-14 12:47:01,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 12:47:01,819 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 216 transitions, 2826 flow [2024-06-14 12:47:01,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:01,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:01,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:01,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:47:01,820 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:01,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:01,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1422786699, now seen corresponding path program 6 times [2024-06-14 12:47:01,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:01,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827479434] [2024-06-14 12:47:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:01,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827479434] [2024-06-14 12:47:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827479434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:02,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:02,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:47:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658251461] [2024-06-14 12:47:02,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:02,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:47:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:47:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:47:02,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:02,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 216 transitions, 2826 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:02,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:02,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:02,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:03,161 INFO L124 PetriNetUnfolderBase]: 2424/3849 cut-off events. [2024-06-14 12:47:03,161 INFO L125 PetriNetUnfolderBase]: For 113187/113191 co-relation queries the response was YES. [2024-06-14 12:47:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26271 conditions, 3849 events. 2424/3849 cut-off events. For 113187/113191 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21548 event pairs, 552 based on Foata normal form. 8/3857 useless extension candidates. Maximal degree in co-relation 26191. Up to 3670 conditions per place. [2024-06-14 12:47:03,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 30 changer transitions 0/230 dead transitions. [2024-06-14 12:47:03,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 3360 flow [2024-06-14 12:47:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:47:03,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:47:03,197 INFO L175 Difference]: Start difference. First operand has 169 places, 216 transitions, 2826 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:47:03,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 3360 flow [2024-06-14 12:47:03,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 230 transitions, 3222 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:03,429 INFO L231 Difference]: Finished difference. Result has 171 places, 216 transitions, 2754 flow [2024-06-14 12:47:03,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2754, PETRI_PLACES=171, PETRI_TRANSITIONS=216} [2024-06-14 12:47:03,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 12:47:03,431 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 216 transitions, 2754 flow [2024-06-14 12:47:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:03,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:03,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:47:03,431 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:03,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 905941349, now seen corresponding path program 2 times [2024-06-14 12:47:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646466750] [2024-06-14 12:47:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646466750] [2024-06-14 12:47:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646466750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:47:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135322480] [2024-06-14 12:47:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:47:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:47:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:47:04,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:04,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 216 transitions, 2754 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:04,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:04,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:04,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:05,045 INFO L124 PetriNetUnfolderBase]: 2468/3919 cut-off events. [2024-06-14 12:47:05,045 INFO L125 PetriNetUnfolderBase]: For 121856/121856 co-relation queries the response was YES. [2024-06-14 12:47:05,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26655 conditions, 3919 events. 2468/3919 cut-off events. For 121856/121856 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22012 event pairs, 573 based on Foata normal form. 12/3930 useless extension candidates. Maximal degree in co-relation 26575. Up to 3686 conditions per place. [2024-06-14 12:47:05,078 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 208 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2024-06-14 12:47:05,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 237 transitions, 3390 flow [2024-06-14 12:47:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:47:05,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:47:05,079 INFO L175 Difference]: Start difference. First operand has 171 places, 216 transitions, 2754 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:47:05,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 237 transitions, 3390 flow [2024-06-14 12:47:05,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 237 transitions, 3234 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:05,289 INFO L231 Difference]: Finished difference. Result has 171 places, 217 transitions, 2669 flow [2024-06-14 12:47:05,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2669, PETRI_PLACES=171, PETRI_TRANSITIONS=217} [2024-06-14 12:47:05,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 12:47:05,290 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 217 transitions, 2669 flow [2024-06-14 12:47:05,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:05,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:05,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:47:05,290 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:05,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1428074121, now seen corresponding path program 3 times [2024-06-14 12:47:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:05,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007880259] [2024-06-14 12:47:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:05,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:06,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:06,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007880259] [2024-06-14 12:47:06,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007880259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:06,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:47:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949688593] [2024-06-14 12:47:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:06,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:47:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:47:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:47:06,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:06,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 217 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:06,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:06,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:06,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:06,876 INFO L124 PetriNetUnfolderBase]: 2470/3925 cut-off events. [2024-06-14 12:47:06,876 INFO L125 PetriNetUnfolderBase]: For 121147/121147 co-relation queries the response was YES. [2024-06-14 12:47:06,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26474 conditions, 3925 events. 2470/3925 cut-off events. For 121147/121147 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22006 event pairs, 563 based on Foata normal form. 8/3932 useless extension candidates. Maximal degree in co-relation 26394. Up to 3602 conditions per place. [2024-06-14 12:47:06,909 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 209 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2024-06-14 12:47:06,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3337 flow [2024-06-14 12:47:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:47:06,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 12:47:06,910 INFO L175 Difference]: Start difference. First operand has 171 places, 217 transitions, 2669 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:47:06,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3337 flow [2024-06-14 12:47:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 240 transitions, 3284 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:07,157 INFO L231 Difference]: Finished difference. Result has 173 places, 218 transitions, 2692 flow [2024-06-14 12:47:07,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2692, PETRI_PLACES=173, PETRI_TRANSITIONS=218} [2024-06-14 12:47:07,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 12:47:07,158 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 218 transitions, 2692 flow [2024-06-14 12:47:07,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:07,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:07,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:47:07,158 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:07,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1650857543, now seen corresponding path program 1 times [2024-06-14 12:47:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001536104] [2024-06-14 12:47:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:08,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:08,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001536104] [2024-06-14 12:47:08,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001536104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:08,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458852248] [2024-06-14 12:47:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:08,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:08,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 218 transitions, 2692 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:08,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:08,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:08,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:08,856 INFO L124 PetriNetUnfolderBase]: 2530/4013 cut-off events. [2024-06-14 12:47:08,856 INFO L125 PetriNetUnfolderBase]: For 130806/130810 co-relation queries the response was YES. [2024-06-14 12:47:08,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 4013 events. 2530/4013 cut-off events. For 130806/130810 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22609 event pairs, 582 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 27140. Up to 3604 conditions per place. [2024-06-14 12:47:08,892 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 183 selfloop transitions, 59 changer transitions 0/246 dead transitions. [2024-06-14 12:47:08,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 246 transitions, 3358 flow [2024-06-14 12:47:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:47:08,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:47:08,893 INFO L175 Difference]: Start difference. First operand has 173 places, 218 transitions, 2692 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:47:08,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 246 transitions, 3358 flow [2024-06-14 12:47:09,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 246 transitions, 3298 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:09,148 INFO L231 Difference]: Finished difference. Result has 176 places, 223 transitions, 2854 flow [2024-06-14 12:47:09,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2854, PETRI_PLACES=176, PETRI_TRANSITIONS=223} [2024-06-14 12:47:09,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 12:47:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 223 transitions, 2854 flow [2024-06-14 12:47:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:47:09,149 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:09,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1759036421, now seen corresponding path program 2 times [2024-06-14 12:47:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792353748] [2024-06-14 12:47:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:09,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:09,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792353748] [2024-06-14 12:47:09,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792353748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:09,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370537688] [2024-06-14 12:47:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:09,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:09,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:10,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:10,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 223 transitions, 2854 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:10,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:10,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:10,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:10,757 INFO L124 PetriNetUnfolderBase]: 2566/4061 cut-off events. [2024-06-14 12:47:10,757 INFO L125 PetriNetUnfolderBase]: For 134914/134914 co-relation queries the response was YES. [2024-06-14 12:47:10,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28514 conditions, 4061 events. 2566/4061 cut-off events. For 134914/134914 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22816 event pairs, 589 based on Foata normal form. 4/4065 useless extension candidates. Maximal degree in co-relation 28432. Up to 3826 conditions per place. [2024-06-14 12:47:10,793 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 36 changer transitions 0/260 dead transitions. [2024-06-14 12:47:10,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 260 transitions, 3745 flow [2024-06-14 12:47:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:47:10,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:47:10,794 INFO L175 Difference]: Start difference. First operand has 176 places, 223 transitions, 2854 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:47:10,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 260 transitions, 3745 flow [2024-06-14 12:47:11,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3545 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:11,120 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 2941 flow [2024-06-14 12:47:11,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-14 12:47:11,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 12:47:11,121 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 2941 flow [2024-06-14 12:47:11,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:11,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:11,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:11,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:47:11,121 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:11,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:11,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2064356275, now seen corresponding path program 3 times [2024-06-14 12:47:11,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753256754] [2024-06-14 12:47:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:11,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753256754] [2024-06-14 12:47:11,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753256754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:11,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:11,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:11,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268018188] [2024-06-14 12:47:11,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:12,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:12,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:12,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:12,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:12,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:12,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:12,809 INFO L124 PetriNetUnfolderBase]: 2586/4089 cut-off events. [2024-06-14 12:47:12,809 INFO L125 PetriNetUnfolderBase]: For 141531/141531 co-relation queries the response was YES. [2024-06-14 12:47:12,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28945 conditions, 4089 events. 2586/4089 cut-off events. For 141531/141531 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22970 event pairs, 593 based on Foata normal form. 4/4093 useless extension candidates. Maximal degree in co-relation 28860. Up to 3939 conditions per place. [2024-06-14 12:47:12,848 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 22 changer transitions 0/256 dead transitions. [2024-06-14 12:47:12,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 256 transitions, 3584 flow [2024-06-14 12:47:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:47:12,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:47:12,850 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 2941 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:47:12,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 256 transitions, 3584 flow [2024-06-14 12:47:13,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 256 transitions, 3512 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 12:47:13,195 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2978 flow [2024-06-14 12:47:13,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-14 12:47:13,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 12:47:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2978 flow [2024-06-14 12:47:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:13,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:13,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:47:13,196 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2064363219, now seen corresponding path program 1 times [2024-06-14 12:47:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033751299] [2024-06-14 12:47:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:14,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:14,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033751299] [2024-06-14 12:47:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033751299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:14,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:14,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922335410] [2024-06-14 12:47:14,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:14,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:14,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:14,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2978 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:14,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:14,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:14,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:14,910 INFO L124 PetriNetUnfolderBase]: 2594/4101 cut-off events. [2024-06-14 12:47:14,910 INFO L125 PetriNetUnfolderBase]: For 144987/144987 co-relation queries the response was YES. [2024-06-14 12:47:14,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29103 conditions, 4101 events. 2594/4101 cut-off events. For 144987/144987 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23060 event pairs, 593 based on Foata normal form. 2/4103 useless extension candidates. Maximal degree in co-relation 29016. Up to 3969 conditions per place. [2024-06-14 12:47:14,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-14 12:47:14,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3574 flow [2024-06-14 12:47:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:47:14,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:47:14,943 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2978 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:47:14,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3574 flow [2024-06-14 12:47:15,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 3504 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:15,288 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 2987 flow [2024-06-14 12:47:15,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2987, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-14 12:47:15,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 12:47:15,288 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 2987 flow [2024-06-14 12:47:15,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:15,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:15,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:47:15,289 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:15,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1419254777, now seen corresponding path program 2 times [2024-06-14 12:47:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:15,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853548999] [2024-06-14 12:47:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:15,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:16,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:16,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853548999] [2024-06-14 12:47:16,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853548999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:16,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:16,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129090529] [2024-06-14 12:47:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:16,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 2987 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:16,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:16,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:16,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:16,905 INFO L124 PetriNetUnfolderBase]: 2602/4113 cut-off events. [2024-06-14 12:47:16,905 INFO L125 PetriNetUnfolderBase]: For 150861/150861 co-relation queries the response was YES. [2024-06-14 12:47:16,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 4113 events. 2602/4113 cut-off events. For 150861/150861 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23158 event pairs, 612 based on Foata normal form. 2/4115 useless extension candidates. Maximal degree in co-relation 29276. Up to 3988 conditions per place. [2024-06-14 12:47:16,938 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 231 selfloop transitions, 18 changer transitions 0/253 dead transitions. [2024-06-14 12:47:16,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 253 transitions, 3563 flow [2024-06-14 12:47:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:47:16,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:47:16,940 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 2987 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:47:16,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 253 transitions, 3563 flow [2024-06-14 12:47:17,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 253 transitions, 3500 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:17,252 INFO L231 Difference]: Finished difference. Result has 188 places, 241 transitions, 3008 flow [2024-06-14 12:47:17,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3008, PETRI_PLACES=188, PETRI_TRANSITIONS=241} [2024-06-14 12:47:17,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 12:47:17,253 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 241 transitions, 3008 flow [2024-06-14 12:47:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:17,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:17,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:47:17,253 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:17,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -419999901, now seen corresponding path program 4 times [2024-06-14 12:47:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129107940] [2024-06-14 12:47:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:18,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129107940] [2024-06-14 12:47:18,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129107940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:18,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:18,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672851140] [2024-06-14 12:47:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:18,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:18,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 241 transitions, 3008 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:18,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:18,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:18,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:18,889 INFO L124 PetriNetUnfolderBase]: 2590/4097 cut-off events. [2024-06-14 12:47:18,889 INFO L125 PetriNetUnfolderBase]: For 154996/154996 co-relation queries the response was YES. [2024-06-14 12:47:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29275 conditions, 4097 events. 2590/4097 cut-off events. For 154996/154996 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23046 event pairs, 604 based on Foata normal form. 4/4101 useless extension candidates. Maximal degree in co-relation 29186. Up to 3962 conditions per place. [2024-06-14 12:47:18,929 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 17 changer transitions 0/257 dead transitions. [2024-06-14 12:47:18,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 257 transitions, 3595 flow [2024-06-14 12:47:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:47:18,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:47:18,930 INFO L175 Difference]: Start difference. First operand has 188 places, 241 transitions, 3008 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:47:18,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 257 transitions, 3595 flow [2024-06-14 12:47:19,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 257 transitions, 3503 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:19,261 INFO L231 Difference]: Finished difference. Result has 191 places, 242 transitions, 2973 flow [2024-06-14 12:47:19,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=191, PETRI_TRANSITIONS=242} [2024-06-14 12:47:19,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 12:47:19,262 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 242 transitions, 2973 flow [2024-06-14 12:47:19,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:19,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:19,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:47:19,262 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:19,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash -411422077, now seen corresponding path program 3 times [2024-06-14 12:47:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:19,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211976142] [2024-06-14 12:47:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211976142] [2024-06-14 12:47:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211976142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:20,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:20,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131452407] [2024-06-14 12:47:20,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:20,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:20,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:20,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 242 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:20,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:20,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:20,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:20,834 INFO L124 PetriNetUnfolderBase]: 2585/4090 cut-off events. [2024-06-14 12:47:20,835 INFO L125 PetriNetUnfolderBase]: For 156216/156216 co-relation queries the response was YES. [2024-06-14 12:47:20,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29152 conditions, 4090 events. 2585/4090 cut-off events. For 156216/156216 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22944 event pairs, 601 based on Foata normal form. 2/4092 useless extension candidates. Maximal degree in co-relation 29062. Up to 3968 conditions per place. [2024-06-14 12:47:20,875 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 238 selfloop transitions, 14 changer transitions 0/256 dead transitions. [2024-06-14 12:47:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 256 transitions, 3553 flow [2024-06-14 12:47:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:47:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:47:20,876 INFO L175 Difference]: Start difference. First operand has 191 places, 242 transitions, 2973 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:47:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 256 transitions, 3553 flow [2024-06-14 12:47:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 256 transitions, 3507 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:21,174 INFO L231 Difference]: Finished difference. Result has 192 places, 244 transitions, 3006 flow [2024-06-14 12:47:21,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=244} [2024-06-14 12:47:21,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 12:47:21,175 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 244 transitions, 3006 flow [2024-06-14 12:47:21,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:21,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:21,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:21,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:47:21,175 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:21,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash -411718995, now seen corresponding path program 1 times [2024-06-14 12:47:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705681318] [2024-06-14 12:47:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:22,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:22,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705681318] [2024-06-14 12:47:22,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705681318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:22,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:22,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136750972] [2024-06-14 12:47:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:22,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:22,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:22,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 244 transitions, 3006 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:22,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:22,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:22,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:22,949 INFO L124 PetriNetUnfolderBase]: 2582/4086 cut-off events. [2024-06-14 12:47:22,949 INFO L125 PetriNetUnfolderBase]: For 160433/160433 co-relation queries the response was YES. [2024-06-14 12:47:22,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29267 conditions, 4086 events. 2582/4086 cut-off events. For 160433/160433 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22953 event pairs, 604 based on Foata normal form. 1/4087 useless extension candidates. Maximal degree in co-relation 29176. Up to 3958 conditions per place. [2024-06-14 12:47:22,988 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 22 changer transitions 0/259 dead transitions. [2024-06-14 12:47:22,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 259 transitions, 3610 flow [2024-06-14 12:47:22,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:47:22,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:47:22,989 INFO L175 Difference]: Start difference. First operand has 192 places, 244 transitions, 3006 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:47:22,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 259 transitions, 3610 flow [2024-06-14 12:47:23,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 259 transitions, 3547 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:23,394 INFO L231 Difference]: Finished difference. Result has 194 places, 247 transitions, 3051 flow [2024-06-14 12:47:23,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3051, PETRI_PLACES=194, PETRI_TRANSITIONS=247} [2024-06-14 12:47:23,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 12:47:23,394 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 247 transitions, 3051 flow [2024-06-14 12:47:23,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:23,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:23,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:23,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:47:23,395 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:23,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -87763493, now seen corresponding path program 1 times [2024-06-14 12:47:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:23,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769388829] [2024-06-14 12:47:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:24,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:24,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769388829] [2024-06-14 12:47:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769388829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:24,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426286208] [2024-06-14 12:47:24,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:24,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:24,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 247 transitions, 3051 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:24,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:24,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:24,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:25,110 INFO L124 PetriNetUnfolderBase]: 2564/4060 cut-off events. [2024-06-14 12:47:25,110 INFO L125 PetriNetUnfolderBase]: For 164331/164331 co-relation queries the response was YES. [2024-06-14 12:47:25,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 4060 events. 2564/4060 cut-off events. For 164331/164331 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22715 event pairs, 461 based on Foata normal form. 8/4067 useless extension candidates. Maximal degree in co-relation 29001. Up to 3773 conditions per place. [2024-06-14 12:47:25,152 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 26 changer transitions 0/272 dead transitions. [2024-06-14 12:47:25,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3775 flow [2024-06-14 12:47:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:47:25,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:47:25,153 INFO L175 Difference]: Start difference. First operand has 194 places, 247 transitions, 3051 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:47:25,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3775 flow [2024-06-14 12:47:25,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 3707 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:25,625 INFO L231 Difference]: Finished difference. Result has 196 places, 247 transitions, 3039 flow [2024-06-14 12:47:25,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3039, PETRI_PLACES=196, PETRI_TRANSITIONS=247} [2024-06-14 12:47:25,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 12:47:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 247 transitions, 3039 flow [2024-06-14 12:47:25,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:25,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:25,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:47:25,627 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -228418241, now seen corresponding path program 1 times [2024-06-14 12:47:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987056105] [2024-06-14 12:47:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:26,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:26,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987056105] [2024-06-14 12:47:26,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987056105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:26,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:26,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:26,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326104000] [2024-06-14 12:47:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:26,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:26,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:26,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 247 transitions, 3039 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:26,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:26,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:27,378 INFO L124 PetriNetUnfolderBase]: 2598/4110 cut-off events. [2024-06-14 12:47:27,378 INFO L125 PetriNetUnfolderBase]: For 169087/169087 co-relation queries the response was YES. [2024-06-14 12:47:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29911 conditions, 4110 events. 2598/4110 cut-off events. For 169087/169087 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23116 event pairs, 556 based on Foata normal form. 2/4111 useless extension candidates. Maximal degree in co-relation 29818. Up to 3850 conditions per place. [2024-06-14 12:47:27,414 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 55 changer transitions 0/279 dead transitions. [2024-06-14 12:47:27,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 279 transitions, 4013 flow [2024-06-14 12:47:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:47:27,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:47:27,415 INFO L175 Difference]: Start difference. First operand has 196 places, 247 transitions, 3039 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:47:27,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 279 transitions, 4013 flow [2024-06-14 12:47:27,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 279 transitions, 3951 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:27,797 INFO L231 Difference]: Finished difference. Result has 199 places, 260 transitions, 3393 flow [2024-06-14 12:47:27,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3393, PETRI_PLACES=199, PETRI_TRANSITIONS=260} [2024-06-14 12:47:27,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-14 12:47:27,797 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 260 transitions, 3393 flow [2024-06-14 12:47:27,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:27,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:27,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:27,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:47:27,798 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:27,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash -221752001, now seen corresponding path program 2 times [2024-06-14 12:47:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:27,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894532176] [2024-06-14 12:47:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:28,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:28,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894532176] [2024-06-14 12:47:28,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894532176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:28,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:28,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785846797] [2024-06-14 12:47:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:28,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:28,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:28,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:28,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 260 transitions, 3393 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:28,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:28,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:28,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:29,495 INFO L124 PetriNetUnfolderBase]: 2594/4104 cut-off events. [2024-06-14 12:47:29,495 INFO L125 PetriNetUnfolderBase]: For 177539/177539 co-relation queries the response was YES. [2024-06-14 12:47:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30467 conditions, 4104 events. 2594/4104 cut-off events. For 177539/177539 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23057 event pairs, 580 based on Foata normal form. 4/4107 useless extension candidates. Maximal degree in co-relation 30372. Up to 3898 conditions per place. [2024-06-14 12:47:29,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-14 12:47:29,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 275 transitions, 4085 flow [2024-06-14 12:47:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:47:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:47:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:47:29,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:47:29,536 INFO L175 Difference]: Start difference. First operand has 199 places, 260 transitions, 3393 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:47:29,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 275 transitions, 4085 flow [2024-06-14 12:47:30,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 275 transitions, 3932 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-14 12:47:30,064 INFO L231 Difference]: Finished difference. Result has 202 places, 263 transitions, 3425 flow [2024-06-14 12:47:30,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3240, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3425, PETRI_PLACES=202, PETRI_TRANSITIONS=263} [2024-06-14 12:47:30,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 12:47:30,065 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 263 transitions, 3425 flow [2024-06-14 12:47:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:30,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:30,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:47:30,065 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1641970189, now seen corresponding path program 1 times [2024-06-14 12:47:30,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:30,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74235967] [2024-06-14 12:47:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:31,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:31,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74235967] [2024-06-14 12:47:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74235967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:31,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:47:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969211738] [2024-06-14 12:47:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:31,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:47:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:47:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:47:31,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:31,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 263 transitions, 3425 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:31,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:31,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:31,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:32,887 INFO L124 PetriNetUnfolderBase]: 2574/4074 cut-off events. [2024-06-14 12:47:32,887 INFO L125 PetriNetUnfolderBase]: For 179243/179247 co-relation queries the response was YES. [2024-06-14 12:47:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30141 conditions, 4074 events. 2574/4074 cut-off events. For 179243/179247 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22919 event pairs, 537 based on Foata normal form. 16/4090 useless extension candidates. Maximal degree in co-relation 30044. Up to 3542 conditions per place. [2024-06-14 12:47:32,926 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 75 changer transitions 0/302 dead transitions. [2024-06-14 12:47:32,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 302 transitions, 4158 flow [2024-06-14 12:47:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:47:32,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-14 12:47:32,927 INFO L175 Difference]: Start difference. First operand has 202 places, 263 transitions, 3425 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:47:32,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 302 transitions, 4158 flow [2024-06-14 12:47:33,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 302 transitions, 4029 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:33,477 INFO L231 Difference]: Finished difference. Result has 207 places, 265 transitions, 3459 flow [2024-06-14 12:47:33,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3459, PETRI_PLACES=207, PETRI_TRANSITIONS=265} [2024-06-14 12:47:33,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 12:47:33,478 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 265 transitions, 3459 flow [2024-06-14 12:47:33,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:33,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:33,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:33,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:47:33,478 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:33,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1935915863, now seen corresponding path program 1 times [2024-06-14 12:47:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:33,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200844808] [2024-06-14 12:47:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200844808] [2024-06-14 12:47:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200844808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992103864] [2024-06-14 12:47:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:34,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:34,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 265 transitions, 3459 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:34,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:35,222 INFO L124 PetriNetUnfolderBase]: 2648/4178 cut-off events. [2024-06-14 12:47:35,222 INFO L125 PetriNetUnfolderBase]: For 183625/183629 co-relation queries the response was YES. [2024-06-14 12:47:35,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31519 conditions, 4178 events. 2648/4178 cut-off events. For 183625/183629 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23426 event pairs, 539 based on Foata normal form. 8/4186 useless extension candidates. Maximal degree in co-relation 31421. Up to 3816 conditions per place. [2024-06-14 12:47:35,270 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 72 changer transitions 0/299 dead transitions. [2024-06-14 12:47:35,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 4502 flow [2024-06-14 12:47:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:47:35,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:47:35,271 INFO L175 Difference]: Start difference. First operand has 207 places, 265 transitions, 3459 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:47:35,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 4502 flow [2024-06-14 12:47:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 299 transitions, 4204 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:35,682 INFO L231 Difference]: Finished difference. Result has 209 places, 277 transitions, 3627 flow [2024-06-14 12:47:35,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3627, PETRI_PLACES=209, PETRI_TRANSITIONS=277} [2024-06-14 12:47:35,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 12:47:35,682 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 277 transitions, 3627 flow [2024-06-14 12:47:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:47:35,683 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:35,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 783089885, now seen corresponding path program 2 times [2024-06-14 12:47:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457838338] [2024-06-14 12:47:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:36,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:36,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457838338] [2024-06-14 12:47:36,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457838338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:36,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:36,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773044278] [2024-06-14 12:47:36,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:36,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:36,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:36,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:36,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 277 transitions, 3627 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:36,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:36,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:36,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:37,378 INFO L124 PetriNetUnfolderBase]: 2668/4206 cut-off events. [2024-06-14 12:47:37,378 INFO L125 PetriNetUnfolderBase]: For 191205/191209 co-relation queries the response was YES. [2024-06-14 12:47:37,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31855 conditions, 4206 events. 2668/4206 cut-off events. For 191205/191209 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23557 event pairs, 543 based on Foata normal form. 8/4214 useless extension candidates. Maximal degree in co-relation 31756. Up to 3942 conditions per place. [2024-06-14 12:47:37,420 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-14 12:47:37,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4404 flow [2024-06-14 12:47:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:47:37,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:47:37,421 INFO L175 Difference]: Start difference. First operand has 209 places, 277 transitions, 3627 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:47:37,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4404 flow [2024-06-14 12:47:37,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 299 transitions, 4224 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:37,897 INFO L231 Difference]: Finished difference. Result has 212 places, 281 transitions, 3693 flow [2024-06-14 12:47:37,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=212, PETRI_TRANSITIONS=281} [2024-06-14 12:47:37,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 12:47:37,898 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 281 transitions, 3693 flow [2024-06-14 12:47:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:37,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:37,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:37,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:47:37,898 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:37,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2142719033, now seen corresponding path program 3 times [2024-06-14 12:47:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553315426] [2024-06-14 12:47:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:38,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:38,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553315426] [2024-06-14 12:47:38,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553315426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931715637] [2024-06-14 12:47:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:38,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:38,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:38,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 281 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:38,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:38,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:38,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:39,646 INFO L124 PetriNetUnfolderBase]: 2656/4190 cut-off events. [2024-06-14 12:47:39,647 INFO L125 PetriNetUnfolderBase]: For 185500/185504 co-relation queries the response was YES. [2024-06-14 12:47:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31453 conditions, 4190 events. 2656/4190 cut-off events. For 185500/185504 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23524 event pairs, 561 based on Foata normal form. 8/4198 useless extension candidates. Maximal degree in co-relation 31353. Up to 4012 conditions per place. [2024-06-14 12:47:39,688 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 259 selfloop transitions, 31 changer transitions 0/294 dead transitions. [2024-06-14 12:47:39,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 294 transitions, 4332 flow [2024-06-14 12:47:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:47:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:47:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:47:39,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:47:39,690 INFO L175 Difference]: Start difference. First operand has 212 places, 281 transitions, 3693 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:47:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 294 transitions, 4332 flow [2024-06-14 12:47:40,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4126 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:40,166 INFO L231 Difference]: Finished difference. Result has 213 places, 281 transitions, 3561 flow [2024-06-14 12:47:40,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3561, PETRI_PLACES=213, PETRI_TRANSITIONS=281} [2024-06-14 12:47:40,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 12:47:40,166 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 281 transitions, 3561 flow [2024-06-14 12:47:40,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:40,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:40,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:40,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:47:40,167 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:40,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash -813644409, now seen corresponding path program 4 times [2024-06-14 12:47:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:40,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091279313] [2024-06-14 12:47:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091279313] [2024-06-14 12:47:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091279313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:41,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041633220] [2024-06-14 12:47:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:41,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:41,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:41,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 281 transitions, 3561 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:41,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:41,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:41,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:42,160 INFO L124 PetriNetUnfolderBase]: 2719/4280 cut-off events. [2024-06-14 12:47:42,160 INFO L125 PetriNetUnfolderBase]: For 196914/196918 co-relation queries the response was YES. [2024-06-14 12:47:42,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32331 conditions, 4280 events. 2719/4280 cut-off events. For 196914/196918 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24009 event pairs, 569 based on Foata normal form. 8/4288 useless extension candidates. Maximal degree in co-relation 32230. Up to 4012 conditions per place. [2024-06-14 12:47:42,201 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 51 changer transitions 0/318 dead transitions. [2024-06-14 12:47:42,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 4664 flow [2024-06-14 12:47:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:47:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:47:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:47:42,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:47:42,203 INFO L175 Difference]: Start difference. First operand has 213 places, 281 transitions, 3561 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:47:42,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 4664 flow [2024-06-14 12:47:42,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 318 transitions, 4592 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:42,640 INFO L231 Difference]: Finished difference. Result has 218 places, 292 transitions, 3876 flow [2024-06-14 12:47:42,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3876, PETRI_PLACES=218, PETRI_TRANSITIONS=292} [2024-06-14 12:47:42,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 12:47:42,641 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 292 transitions, 3876 flow [2024-06-14 12:47:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:42,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:42,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:42,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:47:42,641 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:42,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash -585743259, now seen corresponding path program 5 times [2024-06-14 12:47:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467513210] [2024-06-14 12:47:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:43,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:43,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467513210] [2024-06-14 12:47:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467513210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:43,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:43,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:43,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551149600] [2024-06-14 12:47:43,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:43,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:43,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:43,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:43,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 292 transitions, 3876 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:43,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:43,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:43,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:44,497 INFO L124 PetriNetUnfolderBase]: 2771/4352 cut-off events. [2024-06-14 12:47:44,497 INFO L125 PetriNetUnfolderBase]: For 207744/207748 co-relation queries the response was YES. [2024-06-14 12:47:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33637 conditions, 4352 events. 2771/4352 cut-off events. For 207744/207748 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24363 event pairs, 577 based on Foata normal form. 6/4358 useless extension candidates. Maximal degree in co-relation 33534. Up to 3931 conditions per place. [2024-06-14 12:47:44,540 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-14 12:47:44,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 326 transitions, 4788 flow [2024-06-14 12:47:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:47:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 12:47:44,541 INFO L175 Difference]: Start difference. First operand has 218 places, 292 transitions, 3876 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:47:44,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 326 transitions, 4788 flow [2024-06-14 12:47:45,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 326 transitions, 4628 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:45,060 INFO L231 Difference]: Finished difference. Result has 222 places, 303 transitions, 4055 flow [2024-06-14 12:47:45,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4055, PETRI_PLACES=222, PETRI_TRANSITIONS=303} [2024-06-14 12:47:45,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 12:47:45,061 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 303 transitions, 4055 flow [2024-06-14 12:47:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:45,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:45,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:47:45,061 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:45,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash -573363099, now seen corresponding path program 6 times [2024-06-14 12:47:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587596516] [2024-06-14 12:47:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587596516] [2024-06-14 12:47:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587596516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:45,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41447213] [2024-06-14 12:47:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:45,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:45,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:45,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:45,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 303 transitions, 4055 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:45,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:45,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:45,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:46,824 INFO L124 PetriNetUnfolderBase]: 2805/4399 cut-off events. [2024-06-14 12:47:46,825 INFO L125 PetriNetUnfolderBase]: For 219989/219993 co-relation queries the response was YES. [2024-06-14 12:47:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34702 conditions, 4399 events. 2805/4399 cut-off events. For 219989/219993 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24655 event pairs, 550 based on Foata normal form. 6/4405 useless extension candidates. Maximal degree in co-relation 34597. Up to 3831 conditions per place. [2024-06-14 12:47:46,869 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 221 selfloop transitions, 109 changer transitions 0/334 dead transitions. [2024-06-14 12:47:46,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 334 transitions, 5154 flow [2024-06-14 12:47:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:47:46,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 12:47:46,870 INFO L175 Difference]: Start difference. First operand has 222 places, 303 transitions, 4055 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:47:46,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 334 transitions, 5154 flow [2024-06-14 12:47:47,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 334 transitions, 4985 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:47,480 INFO L231 Difference]: Finished difference. Result has 227 places, 310 transitions, 4374 flow [2024-06-14 12:47:47,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4374, PETRI_PLACES=227, PETRI_TRANSITIONS=310} [2024-06-14 12:47:47,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-14 12:47:47,481 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 310 transitions, 4374 flow [2024-06-14 12:47:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:47,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:47,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:47,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:47:47,481 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:47,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1173687081, now seen corresponding path program 7 times [2024-06-14 12:47:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529919508] [2024-06-14 12:47:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:48,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:48,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529919508] [2024-06-14 12:47:48,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529919508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:48,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:48,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:48,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116493347] [2024-06-14 12:47:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:48,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:48,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 310 transitions, 4374 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:48,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:48,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:49,343 INFO L124 PetriNetUnfolderBase]: 2793/4381 cut-off events. [2024-06-14 12:47:49,343 INFO L125 PetriNetUnfolderBase]: For 230215/230219 co-relation queries the response was YES. [2024-06-14 12:47:49,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35319 conditions, 4381 events. 2793/4381 cut-off events. For 230215/230219 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24540 event pairs, 584 based on Foata normal form. 8/4389 useless extension candidates. Maximal degree in co-relation 35212. Up to 4153 conditions per place. [2024-06-14 12:47:49,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 43 changer transitions 0/330 dead transitions. [2024-06-14 12:47:49,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 330 transitions, 5134 flow [2024-06-14 12:47:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:47:49,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:47:49,391 INFO L175 Difference]: Start difference. First operand has 227 places, 310 transitions, 4374 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:47:49,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 330 transitions, 5134 flow [2024-06-14 12:47:50,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 330 transitions, 4919 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:50,048 INFO L231 Difference]: Finished difference. Result has 230 places, 310 transitions, 4252 flow [2024-06-14 12:47:50,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4252, PETRI_PLACES=230, PETRI_TRANSITIONS=310} [2024-06-14 12:47:50,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 12:47:50,049 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 310 transitions, 4252 flow [2024-06-14 12:47:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:50,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:50,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:50,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:47:50,049 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:50,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1160562921, now seen corresponding path program 8 times [2024-06-14 12:47:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:50,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527074920] [2024-06-14 12:47:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527074920] [2024-06-14 12:47:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527074920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:50,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:50,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261249500] [2024-06-14 12:47:50,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:50,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:50,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:50,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 310 transitions, 4252 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:50,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:50,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:51,775 INFO L124 PetriNetUnfolderBase]: 2835/4441 cut-off events. [2024-06-14 12:47:51,775 INFO L125 PetriNetUnfolderBase]: For 226933/226937 co-relation queries the response was YES. [2024-06-14 12:47:51,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35899 conditions, 4441 events. 2835/4441 cut-off events. For 226933/226937 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24850 event pairs, 561 based on Foata normal form. 6/4447 useless extension candidates. Maximal degree in co-relation 35792. Up to 4048 conditions per place. [2024-06-14 12:47:51,820 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 251 selfloop transitions, 84 changer transitions 0/339 dead transitions. [2024-06-14 12:47:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 339 transitions, 5374 flow [2024-06-14 12:47:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:47:51,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:47:51,821 INFO L175 Difference]: Start difference. First operand has 230 places, 310 transitions, 4252 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:47:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 339 transitions, 5374 flow [2024-06-14 12:47:52,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 339 transitions, 5251 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:52,572 INFO L231 Difference]: Finished difference. Result has 232 places, 317 transitions, 4518 flow [2024-06-14 12:47:52,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4518, PETRI_PLACES=232, PETRI_TRANSITIONS=317} [2024-06-14 12:47:52,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 12:47:52,573 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 317 transitions, 4518 flow [2024-06-14 12:47:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:52,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:52,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:52,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:47:52,573 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:52,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1160800071, now seen corresponding path program 9 times [2024-06-14 12:47:52,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:52,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156767990] [2024-06-14 12:47:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:53,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:53,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156767990] [2024-06-14 12:47:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156767990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:53,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208763939] [2024-06-14 12:47:53,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:53,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:53,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:53,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 317 transitions, 4518 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:53,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:53,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:54,410 INFO L124 PetriNetUnfolderBase]: 2823/4423 cut-off events. [2024-06-14 12:47:54,410 INFO L125 PetriNetUnfolderBase]: For 228879/228883 co-relation queries the response was YES. [2024-06-14 12:47:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35775 conditions, 4423 events. 2823/4423 cut-off events. For 228879/228883 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24756 event pairs, 557 based on Foata normal form. 8/4431 useless extension candidates. Maximal degree in co-relation 35666. Up to 4086 conditions per place. [2024-06-14 12:47:54,451 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 71 changer transitions 0/339 dead transitions. [2024-06-14 12:47:54,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 5379 flow [2024-06-14 12:47:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:47:54,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:47:54,452 INFO L175 Difference]: Start difference. First operand has 232 places, 317 transitions, 4518 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:47:54,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 5379 flow [2024-06-14 12:47:55,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 339 transitions, 5178 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 12:47:55,174 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 4466 flow [2024-06-14 12:47:55,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4466, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-06-14 12:47:55,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 12:47:55,174 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 4466 flow [2024-06-14 12:47:55,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:55,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:55,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:55,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:47:55,175 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:55,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1481437381, now seen corresponding path program 3 times [2024-06-14 12:47:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:55,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097784539] [2024-06-14 12:47:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:55,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097784539] [2024-06-14 12:47:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097784539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:55,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:55,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014720263] [2024-06-14 12:47:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:55,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:56,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:56,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 4466 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:56,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:56,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:56,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:56,945 INFO L124 PetriNetUnfolderBase]: 2825/4422 cut-off events. [2024-06-14 12:47:56,946 INFO L125 PetriNetUnfolderBase]: For 229949/229949 co-relation queries the response was YES. [2024-06-14 12:47:56,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35916 conditions, 4422 events. 2825/4422 cut-off events. For 229949/229949 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24686 event pairs, 592 based on Foata normal form. 2/4423 useless extension candidates. Maximal degree in co-relation 35805. Up to 4256 conditions per place. [2024-06-14 12:47:56,993 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2024-06-14 12:47:56,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 5331 flow [2024-06-14 12:47:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:47:56,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:47:56,994 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 4466 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:47:56,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 5331 flow [2024-06-14 12:47:57,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 338 transitions, 5152 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:47:57,591 INFO L231 Difference]: Finished difference. Result has 239 places, 326 transitions, 4540 flow [2024-06-14 12:47:57,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=239, PETRI_TRANSITIONS=326} [2024-06-14 12:47:57,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 12:47:57,592 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 326 transitions, 4540 flow [2024-06-14 12:47:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:57,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:57,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:47:57,593 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:47:57,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1333845017, now seen corresponding path program 10 times [2024-06-14 12:47:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:57,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117329271] [2024-06-14 12:47:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:58,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:58,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117329271] [2024-06-14 12:47:58,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117329271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:58,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:58,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:47:58,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820555067] [2024-06-14 12:47:58,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:47:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:47:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:47:58,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:47:58,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 326 transitions, 4540 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:47:58,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:58,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:47:58,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:59,397 INFO L124 PetriNetUnfolderBase]: 2845/4452 cut-off events. [2024-06-14 12:47:59,397 INFO L125 PetriNetUnfolderBase]: For 243550/243554 co-relation queries the response was YES. [2024-06-14 12:47:59,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36803 conditions, 4452 events. 2845/4452 cut-off events. For 243550/243554 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24934 event pairs, 585 based on Foata normal form. 8/4460 useless extension candidates. Maximal degree in co-relation 36689. Up to 4289 conditions per place. [2024-06-14 12:47:59,444 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 314 selfloop transitions, 26 changer transitions 0/344 dead transitions. [2024-06-14 12:47:59,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 344 transitions, 5428 flow [2024-06-14 12:47:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:47:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:47:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:47:59,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:47:59,445 INFO L175 Difference]: Start difference. First operand has 239 places, 326 transitions, 4540 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:47:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 344 transitions, 5428 flow [2024-06-14 12:48:00,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 344 transitions, 5280 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:00,206 INFO L231 Difference]: Finished difference. Result has 243 places, 330 transitions, 4577 flow [2024-06-14 12:48:00,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4577, PETRI_PLACES=243, PETRI_TRANSITIONS=330} [2024-06-14 12:48:00,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 12:48:00,207 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 330 transitions, 4577 flow [2024-06-14 12:48:00,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:00,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:00,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:00,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:48:00,208 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:00,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -312204240, now seen corresponding path program 1 times [2024-06-14 12:48:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:00,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564962423] [2024-06-14 12:48:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564962423] [2024-06-14 12:48:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564962423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:00,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:00,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709158085] [2024-06-14 12:48:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:01,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:01,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 330 transitions, 4577 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:01,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:01,923 INFO L124 PetriNetUnfolderBase]: 2855/4472 cut-off events. [2024-06-14 12:48:01,923 INFO L125 PetriNetUnfolderBase]: For 246379/246383 co-relation queries the response was YES. [2024-06-14 12:48:01,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37048 conditions, 4472 events. 2855/4472 cut-off events. For 246379/246383 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25088 event pairs, 584 based on Foata normal form. 6/4478 useless extension candidates. Maximal degree in co-relation 36933. Up to 4302 conditions per place. [2024-06-14 12:48:01,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 31 changer transitions 0/351 dead transitions. [2024-06-14 12:48:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 351 transitions, 5560 flow [2024-06-14 12:48:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:48:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:48:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:48:01,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:48:01,980 INFO L175 Difference]: Start difference. First operand has 243 places, 330 transitions, 4577 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:48:01,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 351 transitions, 5560 flow [2024-06-14 12:48:02,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 351 transitions, 5419 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:02,637 INFO L231 Difference]: Finished difference. Result has 246 places, 339 transitions, 4759 flow [2024-06-14 12:48:02,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4436, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4759, PETRI_PLACES=246, PETRI_TRANSITIONS=339} [2024-06-14 12:48:02,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:48:02,638 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 339 transitions, 4759 flow [2024-06-14 12:48:02,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:02,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:02,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:02,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:48:02,638 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:02,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash -899767300, now seen corresponding path program 2 times [2024-06-14 12:48:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:02,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798481797] [2024-06-14 12:48:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:02,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798481797] [2024-06-14 12:48:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798481797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:03,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:03,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089373740] [2024-06-14 12:48:03,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:03,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:03,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 339 transitions, 4759 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:03,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:03,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:03,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:04,333 INFO L124 PetriNetUnfolderBase]: 2857/4477 cut-off events. [2024-06-14 12:48:04,334 INFO L125 PetriNetUnfolderBase]: For 256820/256824 co-relation queries the response was YES. [2024-06-14 12:48:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37500 conditions, 4477 events. 2857/4477 cut-off events. For 256820/256824 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25140 event pairs, 569 based on Foata normal form. 6/4483 useless extension candidates. Maximal degree in co-relation 37382. Up to 4254 conditions per place. [2024-06-14 12:48:04,383 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 303 selfloop transitions, 51 changer transitions 0/358 dead transitions. [2024-06-14 12:48:04,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 358 transitions, 5741 flow [2024-06-14 12:48:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:48:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:48:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:48:04,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:48:04,384 INFO L175 Difference]: Start difference. First operand has 246 places, 339 transitions, 4759 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:48:04,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 358 transitions, 5741 flow [2024-06-14 12:48:05,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 358 transitions, 5565 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:05,316 INFO L231 Difference]: Finished difference. Result has 250 places, 344 transitions, 4877 flow [2024-06-14 12:48:05,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4877, PETRI_PLACES=250, PETRI_TRANSITIONS=344} [2024-06-14 12:48:05,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 12:48:05,316 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 344 transitions, 4877 flow [2024-06-14 12:48:05,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:05,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:05,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:48:05,317 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:05,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1156713497, now seen corresponding path program 11 times [2024-06-14 12:48:05,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:05,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566185514] [2024-06-14 12:48:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:05,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:06,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566185514] [2024-06-14 12:48:06,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566185514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:06,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:06,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:06,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886579628] [2024-06-14 12:48:06,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:06,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:06,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:06,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:06,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 344 transitions, 4877 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:06,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:06,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:06,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:07,067 INFO L124 PetriNetUnfolderBase]: 2861/4487 cut-off events. [2024-06-14 12:48:07,068 INFO L125 PetriNetUnfolderBase]: For 258715/258719 co-relation queries the response was YES. [2024-06-14 12:48:07,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37711 conditions, 4487 events. 2861/4487 cut-off events. For 258715/258719 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25272 event pairs, 572 based on Foata normal form. 8/4495 useless extension candidates. Maximal degree in co-relation 37592. Up to 4276 conditions per place. [2024-06-14 12:48:07,125 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 324 selfloop transitions, 36 changer transitions 0/364 dead transitions. [2024-06-14 12:48:07,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 5839 flow [2024-06-14 12:48:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:48:07,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:48:07,126 INFO L175 Difference]: Start difference. First operand has 250 places, 344 transitions, 4877 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:48:07,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 5839 flow [2024-06-14 12:48:07,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 364 transitions, 5675 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:48:07,862 INFO L231 Difference]: Finished difference. Result has 253 places, 347 transitions, 4883 flow [2024-06-14 12:48:07,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4883, PETRI_PLACES=253, PETRI_TRANSITIONS=347} [2024-06-14 12:48:07,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 12:48:07,862 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 347 transitions, 4883 flow [2024-06-14 12:48:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:07,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:07,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:48:07,863 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:07,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -135102697, now seen corresponding path program 12 times [2024-06-14 12:48:07,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208314792] [2024-06-14 12:48:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208314792] [2024-06-14 12:48:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208314792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:08,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:08,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146547116] [2024-06-14 12:48:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:08,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:08,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:08,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 347 transitions, 4883 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:08,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:08,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:08,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:09,624 INFO L124 PetriNetUnfolderBase]: 2855/4475 cut-off events. [2024-06-14 12:48:09,624 INFO L125 PetriNetUnfolderBase]: For 250957/250961 co-relation queries the response was YES. [2024-06-14 12:48:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37364 conditions, 4475 events. 2855/4475 cut-off events. For 250957/250961 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25166 event pairs, 569 based on Foata normal form. 6/4481 useless extension candidates. Maximal degree in co-relation 37245. Up to 4220 conditions per place. [2024-06-14 12:48:09,676 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 310 selfloop transitions, 49 changer transitions 0/363 dead transitions. [2024-06-14 12:48:09,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 363 transitions, 5720 flow [2024-06-14 12:48:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:48:09,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:48:09,677 INFO L175 Difference]: Start difference. First operand has 253 places, 347 transitions, 4883 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:48:09,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 363 transitions, 5720 flow [2024-06-14 12:48:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 363 transitions, 5503 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:10,547 INFO L231 Difference]: Finished difference. Result has 254 places, 347 transitions, 4770 flow [2024-06-14 12:48:10,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4666, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=254, PETRI_TRANSITIONS=347} [2024-06-14 12:48:10,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 12:48:10,548 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 347 transitions, 4770 flow [2024-06-14 12:48:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:10,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:10,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:10,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:48:10,548 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:10,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -573348219, now seen corresponding path program 1 times [2024-06-14 12:48:10,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:10,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641890827] [2024-06-14 12:48:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:11,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641890827] [2024-06-14 12:48:11,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641890827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:11,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:11,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:11,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788742929] [2024-06-14 12:48:11,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:11,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:11,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:11,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 347 transitions, 4770 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:11,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:11,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:11,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:12,724 INFO L124 PetriNetUnfolderBase]: 2863/4485 cut-off events. [2024-06-14 12:48:12,724 INFO L125 PetriNetUnfolderBase]: For 255943/255943 co-relation queries the response was YES. [2024-06-14 12:48:12,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37296 conditions, 4485 events. 2863/4485 cut-off events. For 255943/255943 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25164 event pairs, 570 based on Foata normal form. 2/4487 useless extension candidates. Maximal degree in co-relation 37177. Up to 4316 conditions per place. [2024-06-14 12:48:12,769 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 29 changer transitions 0/370 dead transitions. [2024-06-14 12:48:12,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 370 transitions, 5638 flow [2024-06-14 12:48:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:48:12,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:48:12,770 INFO L175 Difference]: Start difference. First operand has 254 places, 347 transitions, 4770 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:48:12,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 370 transitions, 5638 flow [2024-06-14 12:48:13,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 370 transitions, 5369 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 12:48:13,555 INFO L231 Difference]: Finished difference. Result has 254 places, 349 transitions, 4610 flow [2024-06-14 12:48:13,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4610, PETRI_PLACES=254, PETRI_TRANSITIONS=349} [2024-06-14 12:48:13,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 12:48:13,555 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 349 transitions, 4610 flow [2024-06-14 12:48:13,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:13,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:13,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:13,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:48:13,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:13,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1160346231, now seen corresponding path program 2 times [2024-06-14 12:48:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:13,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791253121] [2024-06-14 12:48:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:13,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:14,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:14,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791253121] [2024-06-14 12:48:14,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791253121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:14,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:14,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:14,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238429234] [2024-06-14 12:48:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:14,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:14,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 349 transitions, 4610 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:14,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:14,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:14,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:15,747 INFO L124 PetriNetUnfolderBase]: 2871/4497 cut-off events. [2024-06-14 12:48:15,747 INFO L125 PetriNetUnfolderBase]: For 262937/262937 co-relation queries the response was YES. [2024-06-14 12:48:15,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37160 conditions, 4497 events. 2871/4497 cut-off events. For 262937/262937 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25255 event pairs, 578 based on Foata normal form. 2/4499 useless extension candidates. Maximal degree in co-relation 37041. Up to 4351 conditions per place. [2024-06-14 12:48:15,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 21 changer transitions 0/369 dead transitions. [2024-06-14 12:48:15,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 369 transitions, 5468 flow [2024-06-14 12:48:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:48:15,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:48:15,800 INFO L175 Difference]: Start difference. First operand has 254 places, 349 transitions, 4610 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:48:15,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 369 transitions, 5468 flow [2024-06-14 12:48:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 369 transitions, 5375 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:16,610 INFO L231 Difference]: Finished difference. Result has 256 places, 351 transitions, 4614 flow [2024-06-14 12:48:16,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4614, PETRI_PLACES=256, PETRI_TRANSITIONS=351} [2024-06-14 12:48:16,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 12:48:16,611 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 351 transitions, 4614 flow [2024-06-14 12:48:16,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:16,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:16,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:16,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:48:16,611 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:16,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1160338791, now seen corresponding path program 3 times [2024-06-14 12:48:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:16,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094471507] [2024-06-14 12:48:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:17,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:17,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094471507] [2024-06-14 12:48:17,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094471507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:17,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:17,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:17,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687599714] [2024-06-14 12:48:17,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:17,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:17,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:17,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:17,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 351 transitions, 4614 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:17,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:17,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:18,632 INFO L124 PetriNetUnfolderBase]: 2879/4509 cut-off events. [2024-06-14 12:48:18,633 INFO L125 PetriNetUnfolderBase]: For 270477/270477 co-relation queries the response was YES. [2024-06-14 12:48:18,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37428 conditions, 4509 events. 2879/4509 cut-off events. For 270477/270477 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25359 event pairs, 576 based on Foata normal form. 2/4511 useless extension candidates. Maximal degree in co-relation 37308. Up to 4363 conditions per place. [2024-06-14 12:48:18,687 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 20 changer transitions 0/371 dead transitions. [2024-06-14 12:48:18,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 371 transitions, 5470 flow [2024-06-14 12:48:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:48:18,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:48:18,688 INFO L175 Difference]: Start difference. First operand has 256 places, 351 transitions, 4614 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:48:18,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 371 transitions, 5470 flow [2024-06-14 12:48:19,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 371 transitions, 5389 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:19,458 INFO L231 Difference]: Finished difference. Result has 258 places, 353 transitions, 4632 flow [2024-06-14 12:48:19,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4632, PETRI_PLACES=258, PETRI_TRANSITIONS=353} [2024-06-14 12:48:19,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 12:48:19,459 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 353 transitions, 4632 flow [2024-06-14 12:48:19,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:19,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:19,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:48:19,460 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:19,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1047231572, now seen corresponding path program 1 times [2024-06-14 12:48:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:19,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152767934] [2024-06-14 12:48:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:20,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:20,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152767934] [2024-06-14 12:48:20,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152767934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:20,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:20,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260823163] [2024-06-14 12:48:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:20,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:20,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 353 transitions, 4632 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:20,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:20,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:20,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:21,518 INFO L124 PetriNetUnfolderBase]: 2873/4501 cut-off events. [2024-06-14 12:48:21,518 INFO L125 PetriNetUnfolderBase]: For 273785/273785 co-relation queries the response was YES. [2024-06-14 12:48:21,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37384 conditions, 4501 events. 2873/4501 cut-off events. For 273785/273785 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25346 event pairs, 600 based on Foata normal form. 2/4503 useless extension candidates. Maximal degree in co-relation 37263. Up to 4345 conditions per place. [2024-06-14 12:48:21,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 28 changer transitions 0/371 dead transitions. [2024-06-14 12:48:21,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 371 transitions, 5528 flow [2024-06-14 12:48:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:48:21,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:48:21,570 INFO L175 Difference]: Start difference. First operand has 258 places, 353 transitions, 4632 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:48:21,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 371 transitions, 5528 flow [2024-06-14 12:48:22,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 371 transitions, 5445 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:22,236 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 4705 flow [2024-06-14 12:48:22,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4705, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-14 12:48:22,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-14 12:48:22,237 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 4705 flow [2024-06-14 12:48:22,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:22,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:48:22,237 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:22,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -134886007, now seen corresponding path program 4 times [2024-06-14 12:48:22,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355230496] [2024-06-14 12:48:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355230496] [2024-06-14 12:48:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355230496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:23,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:23,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:23,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897576289] [2024-06-14 12:48:23,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:23,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:23,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 4705 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:23,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:23,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:23,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:24,261 INFO L124 PetriNetUnfolderBase]: 2881/4513 cut-off events. [2024-06-14 12:48:24,261 INFO L125 PetriNetUnfolderBase]: For 282168/282168 co-relation queries the response was YES. [2024-06-14 12:48:24,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 4513 events. 2881/4513 cut-off events. For 282168/282168 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25403 event pairs, 604 based on Foata normal form. 2/4515 useless extension candidates. Maximal degree in co-relation 37764. Up to 4382 conditions per place. [2024-06-14 12:48:24,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 352 selfloop transitions, 16 changer transitions 0/372 dead transitions. [2024-06-14 12:48:24,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 372 transitions, 5555 flow [2024-06-14 12:48:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:48:24,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:48:24,313 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 4705 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:48:24,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 372 transitions, 5555 flow [2024-06-14 12:48:25,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 372 transitions, 5429 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:25,065 INFO L231 Difference]: Finished difference. Result has 261 places, 358 transitions, 4676 flow [2024-06-14 12:48:25,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=261, PETRI_TRANSITIONS=358} [2024-06-14 12:48:25,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 12:48:25,066 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 358 transitions, 4676 flow [2024-06-14 12:48:25,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:25,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:25,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:25,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:48:25,066 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:25,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash -890554937, now seen corresponding path program 5 times [2024-06-14 12:48:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:25,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122879958] [2024-06-14 12:48:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:25,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:25,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:25,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122879958] [2024-06-14 12:48:25,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122879958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:25,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:25,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178803513] [2024-06-14 12:48:25,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:25,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:26,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:26,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 358 transitions, 4676 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:26,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:26,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:26,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:26,958 INFO L124 PetriNetUnfolderBase]: 2889/4525 cut-off events. [2024-06-14 12:48:26,958 INFO L125 PetriNetUnfolderBase]: For 282949/282949 co-relation queries the response was YES. [2024-06-14 12:48:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37985 conditions, 4525 events. 2889/4525 cut-off events. For 282949/282949 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25395 event pairs, 602 based on Foata normal form. 2/4527 useless extension candidates. Maximal degree in co-relation 37863. Up to 4389 conditions per place. [2024-06-14 12:48:27,016 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 16 changer transitions 0/374 dead transitions. [2024-06-14 12:48:27,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 374 transitions, 5514 flow [2024-06-14 12:48:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:48:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:48:27,017 INFO L175 Difference]: Start difference. First operand has 261 places, 358 transitions, 4676 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:48:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 374 transitions, 5514 flow [2024-06-14 12:48:27,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5433 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:27,971 INFO L231 Difference]: Finished difference. Result has 263 places, 360 transitions, 4696 flow [2024-06-14 12:48:27,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4595, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4696, PETRI_PLACES=263, PETRI_TRANSITIONS=360} [2024-06-14 12:48:27,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 12:48:27,971 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 360 transitions, 4696 flow [2024-06-14 12:48:27,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:27,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:27,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:27,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:48:27,972 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:27,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash -134878567, now seen corresponding path program 6 times [2024-06-14 12:48:27,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:27,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031361816] [2024-06-14 12:48:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:29,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031361816] [2024-06-14 12:48:29,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031361816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:29,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:29,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081266190] [2024-06-14 12:48:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:29,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:29,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:29,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:29,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 360 transitions, 4696 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:29,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:29,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:29,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:30,143 INFO L124 PetriNetUnfolderBase]: 2905/4549 cut-off events. [2024-06-14 12:48:30,143 INFO L125 PetriNetUnfolderBase]: For 291252/291252 co-relation queries the response was YES. [2024-06-14 12:48:30,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38307 conditions, 4549 events. 2905/4549 cut-off events. For 291252/291252 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25634 event pairs, 608 based on Foata normal form. 2/4551 useless extension candidates. Maximal degree in co-relation 38184. Up to 4418 conditions per place. [2024-06-14 12:48:30,198 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 15 changer transitions 0/378 dead transitions. [2024-06-14 12:48:30,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 378 transitions, 5564 flow [2024-06-14 12:48:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:48:30,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:48:30,199 INFO L175 Difference]: Start difference. First operand has 263 places, 360 transitions, 4696 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:48:30,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 378 transitions, 5564 flow [2024-06-14 12:48:30,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 378 transitions, 5479 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:30,962 INFO L231 Difference]: Finished difference. Result has 266 places, 364 transitions, 4729 flow [2024-06-14 12:48:30,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=266, PETRI_TRANSITIONS=364} [2024-06-14 12:48:30,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 12:48:30,963 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 364 transitions, 4729 flow [2024-06-14 12:48:30,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:30,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:30,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:48:30,963 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 121614503, now seen corresponding path program 7 times [2024-06-14 12:48:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817758480] [2024-06-14 12:48:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:32,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817758480] [2024-06-14 12:48:32,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817758480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:32,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:32,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101729516] [2024-06-14 12:48:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:32,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:32,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:32,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 364 transitions, 4729 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:32,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:32,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:32,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:33,040 INFO L124 PetriNetUnfolderBase]: 2913/4561 cut-off events. [2024-06-14 12:48:33,040 INFO L125 PetriNetUnfolderBase]: For 299570/299570 co-relation queries the response was YES. [2024-06-14 12:48:33,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38614 conditions, 4561 events. 2913/4561 cut-off events. For 299570/299570 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25717 event pairs, 608 based on Foata normal form. 2/4563 useless extension candidates. Maximal degree in co-relation 38489. Up to 4415 conditions per place. [2024-06-14 12:48:33,095 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 350 selfloop transitions, 26 changer transitions 0/380 dead transitions. [2024-06-14 12:48:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 380 transitions, 5607 flow [2024-06-14 12:48:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:48:33,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:48:33,096 INFO L175 Difference]: Start difference. First operand has 266 places, 364 transitions, 4729 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:48:33,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 380 transitions, 5607 flow [2024-06-14 12:48:34,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 380 transitions, 5527 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:34,009 INFO L231 Difference]: Finished difference. Result has 270 places, 366 transitions, 4781 flow [2024-06-14 12:48:34,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4781, PETRI_PLACES=270, PETRI_TRANSITIONS=366} [2024-06-14 12:48:34,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 12:48:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 366 transitions, 4781 flow [2024-06-14 12:48:34,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:34,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:34,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:34,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:48:34,010 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash -100969657, now seen corresponding path program 8 times [2024-06-14 12:48:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:34,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433137170] [2024-06-14 12:48:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:34,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:34,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:34,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433137170] [2024-06-14 12:48:34,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433137170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:34,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:34,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000330463] [2024-06-14 12:48:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:35,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:35,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 366 transitions, 4781 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:35,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:35,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:35,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:35,979 INFO L124 PetriNetUnfolderBase]: 2908/4554 cut-off events. [2024-06-14 12:48:35,979 INFO L125 PetriNetUnfolderBase]: For 302962/302962 co-relation queries the response was YES. [2024-06-14 12:48:36,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38570 conditions, 4554 events. 2908/4554 cut-off events. For 302962/302962 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25657 event pairs, 607 based on Foata normal form. 2/4556 useless extension candidates. Maximal degree in co-relation 38444. Up to 4403 conditions per place. [2024-06-14 12:48:36,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 24 changer transitions 0/382 dead transitions. [2024-06-14 12:48:36,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 382 transitions, 5657 flow [2024-06-14 12:48:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:48:36,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:48:36,036 INFO L175 Difference]: Start difference. First operand has 270 places, 366 transitions, 4781 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:48:36,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 382 transitions, 5657 flow [2024-06-14 12:48:36,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 382 transitions, 5541 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:36,851 INFO L231 Difference]: Finished difference. Result has 272 places, 368 transitions, 4797 flow [2024-06-14 12:48:36,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4797, PETRI_PLACES=272, PETRI_TRANSITIONS=368} [2024-06-14 12:48:36,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 12:48:36,851 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 368 transitions, 4797 flow [2024-06-14 12:48:36,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:36,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:36,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:48:36,852 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:36,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:36,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2147117433, now seen corresponding path program 1 times [2024-06-14 12:48:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:36,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254102472] [2024-06-14 12:48:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:37,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:37,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254102472] [2024-06-14 12:48:37,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254102472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:37,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:37,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:37,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470784408] [2024-06-14 12:48:37,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:37,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:38,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:38,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 368 transitions, 4797 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:38,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:38,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:38,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:38,954 INFO L124 PetriNetUnfolderBase]: 2939/4593 cut-off events. [2024-06-14 12:48:38,954 INFO L125 PetriNetUnfolderBase]: For 308540/308540 co-relation queries the response was YES. [2024-06-14 12:48:38,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39212 conditions, 4593 events. 2939/4593 cut-off events. For 308540/308540 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25818 event pairs, 544 based on Foata normal form. 2/4594 useless extension candidates. Maximal degree in co-relation 39085. Up to 4154 conditions per place. [2024-06-14 12:48:39,011 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 299 selfloop transitions, 96 changer transitions 0/399 dead transitions. [2024-06-14 12:48:39,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 6109 flow [2024-06-14 12:48:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:48:39,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:48:39,012 INFO L175 Difference]: Start difference. First operand has 272 places, 368 transitions, 4797 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:48:39,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 6109 flow [2024-06-14 12:48:39,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 399 transitions, 5995 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:39,944 INFO L231 Difference]: Finished difference. Result has 275 places, 377 transitions, 5232 flow [2024-06-14 12:48:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5232, PETRI_PLACES=275, PETRI_TRANSITIONS=377} [2024-06-14 12:48:39,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 12:48:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 377 transitions, 5232 flow [2024-06-14 12:48:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:39,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:39,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:39,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:48:39,945 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:39,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -143898355, now seen corresponding path program 2 times [2024-06-14 12:48:39,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:39,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437176075] [2024-06-14 12:48:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437176075] [2024-06-14 12:48:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437176075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:41,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:41,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:41,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55035133] [2024-06-14 12:48:41,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:41,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:41,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:41,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:41,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 377 transitions, 5232 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:41,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:41,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:41,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:42,203 INFO L124 PetriNetUnfolderBase]: 2949/4609 cut-off events. [2024-06-14 12:48:42,204 INFO L125 PetriNetUnfolderBase]: For 313006/313006 co-relation queries the response was YES. [2024-06-14 12:48:42,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39994 conditions, 4609 events. 2949/4609 cut-off events. For 313006/313006 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25968 event pairs, 558 based on Foata normal form. 2/4610 useless extension candidates. Maximal degree in co-relation 39865. Up to 4267 conditions per place. [2024-06-14 12:48:42,255 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 91 changer transitions 0/397 dead transitions. [2024-06-14 12:48:42,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 397 transitions, 6222 flow [2024-06-14 12:48:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:48:42,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:48:42,256 INFO L175 Difference]: Start difference. First operand has 275 places, 377 transitions, 5232 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:48:42,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 397 transitions, 6222 flow [2024-06-14 12:48:43,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 397 transitions, 6054 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:43,165 INFO L231 Difference]: Finished difference. Result has 279 places, 380 transitions, 5392 flow [2024-06-14 12:48:43,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5392, PETRI_PLACES=279, PETRI_TRANSITIONS=380} [2024-06-14 12:48:43,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 12:48:43,165 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 380 transitions, 5392 flow [2024-06-14 12:48:43,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:43,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:43,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:43,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:48:43,166 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:43,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1514534523, now seen corresponding path program 3 times [2024-06-14 12:48:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820131721] [2024-06-14 12:48:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820131721] [2024-06-14 12:48:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820131721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:44,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:48:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252605059] [2024-06-14 12:48:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:44,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:48:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:48:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:48:44,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:44,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 380 transitions, 5392 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:44,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:44,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:44,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:45,569 INFO L124 PetriNetUnfolderBase]: 2953/4615 cut-off events. [2024-06-14 12:48:45,569 INFO L125 PetriNetUnfolderBase]: For 315579/315579 co-relation queries the response was YES. [2024-06-14 12:48:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40074 conditions, 4615 events. 2953/4615 cut-off events. For 315579/315579 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 26026 event pairs, 589 based on Foata normal form. 4/4618 useless extension candidates. Maximal degree in co-relation 39944. Up to 4363 conditions per place. [2024-06-14 12:48:45,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 63 changer transitions 0/396 dead transitions. [2024-06-14 12:48:45,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 396 transitions, 6392 flow [2024-06-14 12:48:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:48:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:48:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:48:45,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:48:45,629 INFO L175 Difference]: Start difference. First operand has 279 places, 380 transitions, 5392 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:48:45,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 396 transitions, 6392 flow [2024-06-14 12:48:46,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 396 transitions, 6074 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:46,699 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 5397 flow [2024-06-14 12:48:46,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5397, PETRI_PLACES=279, PETRI_TRANSITIONS=384} [2024-06-14 12:48:46,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 12:48:46,700 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 5397 flow [2024-06-14 12:48:46,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:46,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:46,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:46,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:48:46,700 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:46,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -116477655, now seen corresponding path program 4 times [2024-06-14 12:48:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078076910] [2024-06-14 12:48:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:46,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:47,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078076910] [2024-06-14 12:48:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078076910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:47,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:47,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:47,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182629761] [2024-06-14 12:48:47,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:47,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:48,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:48,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 384 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:48,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:48,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:48,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:49,287 INFO L124 PetriNetUnfolderBase]: 2990/4680 cut-off events. [2024-06-14 12:48:49,287 INFO L125 PetriNetUnfolderBase]: For 321294/321298 co-relation queries the response was YES. [2024-06-14 12:48:49,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41047 conditions, 4680 events. 2990/4680 cut-off events. For 321294/321298 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26453 event pairs, 543 based on Foata normal form. 6/4686 useless extension candidates. Maximal degree in co-relation 40917. Up to 4258 conditions per place. [2024-06-14 12:48:49,347 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 332 selfloop transitions, 84 changer transitions 0/420 dead transitions. [2024-06-14 12:48:49,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 420 transitions, 6794 flow [2024-06-14 12:48:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:48:49,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:48:49,348 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 5397 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:48:49,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 420 transitions, 6794 flow [2024-06-14 12:48:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 420 transitions, 6545 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:50,292 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 5650 flow [2024-06-14 12:48:50,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5650, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-14 12:48:50,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 12:48:50,293 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 5650 flow [2024-06-14 12:48:50,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:50,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:50,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:48:50,293 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -116149148, now seen corresponding path program 1 times [2024-06-14 12:48:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702379387] [2024-06-14 12:48:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702379387] [2024-06-14 12:48:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702379387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:51,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:51,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311715907] [2024-06-14 12:48:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:51,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:51,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:51,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 5650 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:51,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:51,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:51,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:52,531 INFO L124 PetriNetUnfolderBase]: 3084/4812 cut-off events. [2024-06-14 12:48:52,531 INFO L125 PetriNetUnfolderBase]: For 344597/344601 co-relation queries the response was YES. [2024-06-14 12:48:52,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42980 conditions, 4812 events. 3084/4812 cut-off events. For 344597/344601 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27211 event pairs, 534 based on Foata normal form. 8/4820 useless extension candidates. Maximal degree in co-relation 42849. Up to 4298 conditions per place. [2024-06-14 12:48:52,591 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 338 selfloop transitions, 100 changer transitions 0/442 dead transitions. [2024-06-14 12:48:52,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 7249 flow [2024-06-14 12:48:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:48:52,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 12:48:52,592 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 5650 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:48:52,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 7249 flow [2024-06-14 12:48:53,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 442 transitions, 6985 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-14 12:48:53,501 INFO L231 Difference]: Finished difference. Result has 289 places, 418 transitions, 6175 flow [2024-06-14 12:48:53,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6175, PETRI_PLACES=289, PETRI_TRANSITIONS=418} [2024-06-14 12:48:53,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 12:48:53,502 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 418 transitions, 6175 flow [2024-06-14 12:48:53,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:53,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:53,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:53,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:48:53,503 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:53,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -116149365, now seen corresponding path program 5 times [2024-06-14 12:48:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689175355] [2024-06-14 12:48:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:53,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:54,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:54,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689175355] [2024-06-14 12:48:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689175355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:54,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564292668] [2024-06-14 12:48:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 418 transitions, 6175 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:56,305 INFO L124 PetriNetUnfolderBase]: 3094/4830 cut-off events. [2024-06-14 12:48:56,305 INFO L125 PetriNetUnfolderBase]: For 353008/353012 co-relation queries the response was YES. [2024-06-14 12:48:56,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44107 conditions, 4830 events. 3094/4830 cut-off events. For 353008/353012 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27320 event pairs, 534 based on Foata normal form. 6/4836 useless extension candidates. Maximal degree in co-relation 43972. Up to 4400 conditions per place. [2024-06-14 12:48:56,362 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 355 selfloop transitions, 86 changer transitions 0/445 dead transitions. [2024-06-14 12:48:56,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 445 transitions, 7407 flow [2024-06-14 12:48:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:48:56,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:48:56,363 INFO L175 Difference]: Start difference. First operand has 289 places, 418 transitions, 6175 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:48:56,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 445 transitions, 7407 flow [2024-06-14 12:48:57,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 445 transitions, 7171 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 12:48:57,497 INFO L231 Difference]: Finished difference. Result has 294 places, 421 transitions, 6212 flow [2024-06-14 12:48:57,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6212, PETRI_PLACES=294, PETRI_TRANSITIONS=421} [2024-06-14 12:48:57,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 12:48:57,498 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 421 transitions, 6212 flow [2024-06-14 12:48:57,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:57,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:48:57,499 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:57,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1494009154, now seen corresponding path program 1 times [2024-06-14 12:48:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466212244] [2024-06-14 12:48:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:58,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:58,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466212244] [2024-06-14 12:48:58,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466212244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:58,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079388894] [2024-06-14 12:48:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:58,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:48:58,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 421 transitions, 6212 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:58,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:58,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:48:58,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:59,962 INFO L124 PetriNetUnfolderBase]: 3138/4896 cut-off events. [2024-06-14 12:48:59,962 INFO L125 PetriNetUnfolderBase]: For 384775/384775 co-relation queries the response was YES. [2024-06-14 12:49:00,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44913 conditions, 4896 events. 3138/4896 cut-off events. For 384775/384775 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27863 event pairs, 554 based on Foata normal form. 12/4907 useless extension candidates. Maximal degree in co-relation 44776. Up to 4530 conditions per place. [2024-06-14 12:49:00,026 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 68 changer transitions 0/445 dead transitions. [2024-06-14 12:49:00,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 445 transitions, 7371 flow [2024-06-14 12:49:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:49:00,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:49:00,027 INFO L175 Difference]: Start difference. First operand has 294 places, 421 transitions, 6212 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:49:00,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 445 transitions, 7371 flow [2024-06-14 12:49:01,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 445 transitions, 7165 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:01,158 INFO L231 Difference]: Finished difference. Result has 296 places, 422 transitions, 6189 flow [2024-06-14 12:49:01,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6189, PETRI_PLACES=296, PETRI_TRANSITIONS=422} [2024-06-14 12:49:01,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 12:49:01,159 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 422 transitions, 6189 flow [2024-06-14 12:49:01,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:01,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:01,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:01,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:49:01,159 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:01,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -93639692, now seen corresponding path program 2 times [2024-06-14 12:49:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153933980] [2024-06-14 12:49:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153933980] [2024-06-14 12:49:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153933980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:02,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738444112] [2024-06-14 12:49:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:02,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:02,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 422 transitions, 6189 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:02,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:02,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:02,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:03,289 INFO L124 PetriNetUnfolderBase]: 3158/4928 cut-off events. [2024-06-14 12:49:03,289 INFO L125 PetriNetUnfolderBase]: For 375015/375019 co-relation queries the response was YES. [2024-06-14 12:49:03,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45285 conditions, 4928 events. 3158/4928 cut-off events. For 375015/375019 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28029 event pairs, 561 based on Foata normal form. 8/4936 useless extension candidates. Maximal degree in co-relation 45147. Up to 4621 conditions per place. [2024-06-14 12:49:03,353 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 376 selfloop transitions, 66 changer transitions 0/446 dead transitions. [2024-06-14 12:49:03,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 446 transitions, 7316 flow [2024-06-14 12:49:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:49:03,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 12:49:03,354 INFO L175 Difference]: Start difference. First operand has 296 places, 422 transitions, 6189 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:49:03,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 446 transitions, 7316 flow [2024-06-14 12:49:04,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 446 transitions, 7177 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:04,716 INFO L231 Difference]: Finished difference. Result has 299 places, 426 transitions, 6336 flow [2024-06-14 12:49:04,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6336, PETRI_PLACES=299, PETRI_TRANSITIONS=426} [2024-06-14 12:49:04,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 12:49:04,717 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 426 transitions, 6336 flow [2024-06-14 12:49:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:04,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:04,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:04,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:49:04,718 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:04,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -111507735, now seen corresponding path program 6 times [2024-06-14 12:49:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060408834] [2024-06-14 12:49:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:05,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:05,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060408834] [2024-06-14 12:49:05,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060408834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:05,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:05,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:05,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855511380] [2024-06-14 12:49:05,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:06,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:06,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 426 transitions, 6336 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:06,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:06,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:06,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:07,242 INFO L124 PetriNetUnfolderBase]: 3168/4946 cut-off events. [2024-06-14 12:49:07,243 INFO L125 PetriNetUnfolderBase]: For 377372/377376 co-relation queries the response was YES. [2024-06-14 12:49:07,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45543 conditions, 4946 events. 3168/4946 cut-off events. For 377372/377376 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 28180 event pairs, 561 based on Foata normal form. 6/4952 useless extension candidates. Maximal degree in co-relation 45404. Up to 4651 conditions per place. [2024-06-14 12:49:07,308 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 382 selfloop transitions, 63 changer transitions 0/449 dead transitions. [2024-06-14 12:49:07,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 449 transitions, 7431 flow [2024-06-14 12:49:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:49:07,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 12:49:07,310 INFO L175 Difference]: Start difference. First operand has 299 places, 426 transitions, 6336 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:49:07,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 449 transitions, 7431 flow [2024-06-14 12:49:08,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 449 transitions, 7197 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:08,557 INFO L231 Difference]: Finished difference. Result has 301 places, 429 transitions, 6338 flow [2024-06-14 12:49:08,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6338, PETRI_PLACES=301, PETRI_TRANSITIONS=429} [2024-06-14 12:49:08,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 12:49:08,558 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 429 transitions, 6338 flow [2024-06-14 12:49:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:08,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:08,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:49:08,558 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:08,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash -784535546, now seen corresponding path program 2 times [2024-06-14 12:49:08,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:08,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740892868] [2024-06-14 12:49:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:08,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740892868] [2024-06-14 12:49:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740892868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:09,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018138767] [2024-06-14 12:49:09,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:09,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:09,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:09,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 429 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:09,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:09,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:09,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:10,597 INFO L124 PetriNetUnfolderBase]: 3196/4994 cut-off events. [2024-06-14 12:49:10,597 INFO L125 PetriNetUnfolderBase]: For 400625/400629 co-relation queries the response was YES. [2024-06-14 12:49:10,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45967 conditions, 4994 events. 3196/4994 cut-off events. For 400625/400629 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28520 event pairs, 602 based on Foata normal form. 12/5006 useless extension candidates. Maximal degree in co-relation 45827. Up to 4775 conditions per place. [2024-06-14 12:49:10,663 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 416 selfloop transitions, 27 changer transitions 0/447 dead transitions. [2024-06-14 12:49:10,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 447 transitions, 7446 flow [2024-06-14 12:49:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:49:10,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:49:10,664 INFO L175 Difference]: Start difference. First operand has 301 places, 429 transitions, 6338 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:49:10,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 447 transitions, 7446 flow [2024-06-14 12:49:11,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 447 transitions, 7244 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:11,836 INFO L231 Difference]: Finished difference. Result has 302 places, 432 transitions, 6299 flow [2024-06-14 12:49:11,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6299, PETRI_PLACES=302, PETRI_TRANSITIONS=432} [2024-06-14 12:49:11,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 12:49:11,836 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 432 transitions, 6299 flow [2024-06-14 12:49:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:11,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:11,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:11,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:49:11,836 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:11,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 997009908, now seen corresponding path program 3 times [2024-06-14 12:49:11,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:11,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961373290] [2024-06-14 12:49:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:11,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:12,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961373290] [2024-06-14 12:49:12,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961373290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:12,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:12,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687819379] [2024-06-14 12:49:12,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:12,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:12,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:12,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:12,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 432 transitions, 6299 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:12,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:12,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:12,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:14,012 INFO L124 PetriNetUnfolderBase]: 3240/5058 cut-off events. [2024-06-14 12:49:14,013 INFO L125 PetriNetUnfolderBase]: For 427698/427698 co-relation queries the response was YES. [2024-06-14 12:49:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46900 conditions, 5058 events. 3240/5058 cut-off events. For 427698/427698 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29039 event pairs, 623 based on Foata normal form. 12/5069 useless extension candidates. Maximal degree in co-relation 46758. Up to 4785 conditions per place. [2024-06-14 12:49:14,082 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 33 changer transitions 0/451 dead transitions. [2024-06-14 12:49:14,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 451 transitions, 7450 flow [2024-06-14 12:49:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:49:14,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:49:14,083 INFO L175 Difference]: Start difference. First operand has 302 places, 432 transitions, 6299 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:49:14,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 451 transitions, 7450 flow [2024-06-14 12:49:15,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 451 transitions, 7345 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:15,664 INFO L231 Difference]: Finished difference. Result has 305 places, 433 transitions, 6311 flow [2024-06-14 12:49:15,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6311, PETRI_PLACES=305, PETRI_TRANSITIONS=433} [2024-06-14 12:49:15,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 12:49:15,665 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 433 transitions, 6311 flow [2024-06-14 12:49:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:15,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:15,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:15,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:49:15,665 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:15,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 997002747, now seen corresponding path program 7 times [2024-06-14 12:49:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:15,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919036037] [2024-06-14 12:49:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:15,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:16,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919036037] [2024-06-14 12:49:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919036037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:16,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:16,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479405200] [2024-06-14 12:49:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:16,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:16,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:16,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:16,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 433 transitions, 6311 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:16,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:16,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:16,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:18,197 INFO L124 PetriNetUnfolderBase]: 3234/5054 cut-off events. [2024-06-14 12:49:18,198 INFO L125 PetriNetUnfolderBase]: For 404885/404889 co-relation queries the response was YES. [2024-06-14 12:49:18,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46654 conditions, 5054 events. 3234/5054 cut-off events. For 404885/404889 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29095 event pairs, 613 based on Foata normal form. 6/5060 useless extension candidates. Maximal degree in co-relation 46511. Up to 4841 conditions per place. [2024-06-14 12:49:18,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 410 selfloop transitions, 34 changer transitions 0/448 dead transitions. [2024-06-14 12:49:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 448 transitions, 7280 flow [2024-06-14 12:49:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:49:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:49:18,263 INFO L175 Difference]: Start difference. First operand has 305 places, 433 transitions, 6311 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:49:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 448 transitions, 7280 flow [2024-06-14 12:49:19,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 448 transitions, 7149 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:19,644 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 6254 flow [2024-06-14 12:49:19,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2024-06-14 12:49:19,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-14 12:49:19,645 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 6254 flow [2024-06-14 12:49:19,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:19,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:19,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:19,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:49:19,645 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:19,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:19,646 INFO L85 PathProgramCache]: Analyzing trace with hash 997002964, now seen corresponding path program 3 times [2024-06-14 12:49:19,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:19,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575510844] [2024-06-14 12:49:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:19,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:20,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575510844] [2024-06-14 12:49:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575510844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:20,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:20,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225175693] [2024-06-14 12:49:20,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:20,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:20,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 6254 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:20,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:20,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:21,795 INFO L124 PetriNetUnfolderBase]: 3222/5036 cut-off events. [2024-06-14 12:49:21,795 INFO L125 PetriNetUnfolderBase]: For 402889/402893 co-relation queries the response was YES. [2024-06-14 12:49:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46004 conditions, 5036 events. 3222/5036 cut-off events. For 402889/402893 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 28933 event pairs, 609 based on Foata normal form. 8/5044 useless extension candidates. Maximal degree in co-relation 45860. Up to 4809 conditions per place. [2024-06-14 12:49:21,863 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 37 changer transitions 0/448 dead transitions. [2024-06-14 12:49:21,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 448 transitions, 7223 flow [2024-06-14 12:49:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:49:21,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:49:21,864 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 6254 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:49:21,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 448 transitions, 7223 flow [2024-06-14 12:49:23,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 448 transitions, 7089 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:23,235 INFO L231 Difference]: Finished difference. Result has 311 places, 433 transitions, 6204 flow [2024-06-14 12:49:23,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6204, PETRI_PLACES=311, PETRI_TRANSITIONS=433} [2024-06-14 12:49:23,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 12:49:23,236 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 433 transitions, 6204 flow [2024-06-14 12:49:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:23,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:23,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:49:23,236 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:23,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -377224462, now seen corresponding path program 4 times [2024-06-14 12:49:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798287383] [2024-06-14 12:49:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:24,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798287383] [2024-06-14 12:49:24,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798287383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:24,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:24,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469647384] [2024-06-14 12:49:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:24,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 433 transitions, 6204 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:25,428 INFO L124 PetriNetUnfolderBase]: 3294/5150 cut-off events. [2024-06-14 12:49:25,428 INFO L125 PetriNetUnfolderBase]: For 434564/434568 co-relation queries the response was YES. [2024-06-14 12:49:25,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47349 conditions, 5150 events. 3294/5150 cut-off events. For 434564/434568 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29725 event pairs, 625 based on Foata normal form. 14/5164 useless extension candidates. Maximal degree in co-relation 47204. Up to 4848 conditions per place. [2024-06-14 12:49:25,501 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 42 changer transitions 0/452 dead transitions. [2024-06-14 12:49:25,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 452 transitions, 7372 flow [2024-06-14 12:49:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:49:25,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:49:25,502 INFO L175 Difference]: Start difference. First operand has 311 places, 433 transitions, 6204 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:49:25,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 452 transitions, 7372 flow [2024-06-14 12:49:26,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 452 transitions, 7254 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:26,772 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 6256 flow [2024-06-14 12:49:26,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6086, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6256, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-14 12:49:26,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 12:49:26,772 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 6256 flow [2024-06-14 12:49:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:26,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:26,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:26,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:49:26,772 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:26,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:26,773 INFO L85 PathProgramCache]: Analyzing trace with hash 546499833, now seen corresponding path program 8 times [2024-06-14 12:49:26,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:26,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517703038] [2024-06-14 12:49:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:26,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:28,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:28,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517703038] [2024-06-14 12:49:28,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517703038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:28,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321575970] [2024-06-14 12:49:28,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:28,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:28,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:28,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 6256 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:28,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:28,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:29,749 INFO L124 PetriNetUnfolderBase]: 3331/5211 cut-off events. [2024-06-14 12:49:29,749 INFO L125 PetriNetUnfolderBase]: For 433170/433174 co-relation queries the response was YES. [2024-06-14 12:49:29,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48411 conditions, 5211 events. 3331/5211 cut-off events. For 433170/433174 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30187 event pairs, 637 based on Foata normal form. 6/5217 useless extension candidates. Maximal degree in co-relation 48265. Up to 4885 conditions per place. [2024-06-14 12:49:29,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 412 selfloop transitions, 59 changer transitions 0/475 dead transitions. [2024-06-14 12:49:29,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 475 transitions, 7854 flow [2024-06-14 12:49:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:49:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:49:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:49:29,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 12:49:29,814 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 6256 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:49:29,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 475 transitions, 7854 flow [2024-06-14 12:49:31,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 475 transitions, 7762 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:31,122 INFO L231 Difference]: Finished difference. Result has 318 places, 444 transitions, 6635 flow [2024-06-14 12:49:31,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6635, PETRI_PLACES=318, PETRI_TRANSITIONS=444} [2024-06-14 12:49:31,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 12:49:31,122 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 444 transitions, 6635 flow [2024-06-14 12:49:31,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:31,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:31,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:31,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:49:31,122 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:31,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:31,123 INFO L85 PathProgramCache]: Analyzing trace with hash 546828123, now seen corresponding path program 9 times [2024-06-14 12:49:31,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:31,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133028907] [2024-06-14 12:49:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:31,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133028907] [2024-06-14 12:49:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133028907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:32,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:32,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:32,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199135011] [2024-06-14 12:49:32,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:32,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:32,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 444 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:33,738 INFO L124 PetriNetUnfolderBase]: 3341/5229 cut-off events. [2024-06-14 12:49:33,738 INFO L125 PetriNetUnfolderBase]: For 449098/449102 co-relation queries the response was YES. [2024-06-14 12:49:33,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49144 conditions, 5229 events. 3341/5229 cut-off events. For 449098/449102 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30355 event pairs, 637 based on Foata normal form. 6/5235 useless extension candidates. Maximal degree in co-relation 48996. Up to 4895 conditions per place. [2024-06-14 12:49:33,810 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 410 selfloop transitions, 61 changer transitions 0/475 dead transitions. [2024-06-14 12:49:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 475 transitions, 8046 flow [2024-06-14 12:49:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:49:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:49:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:49:33,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-14 12:49:33,811 INFO L175 Difference]: Start difference. First operand has 318 places, 444 transitions, 6635 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:49:33,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 475 transitions, 8046 flow [2024-06-14 12:49:35,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 475 transitions, 7688 flow, removed 129 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:35,618 INFO L231 Difference]: Finished difference. Result has 321 places, 447 transitions, 6554 flow [2024-06-14 12:49:35,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6554, PETRI_PLACES=321, PETRI_TRANSITIONS=447} [2024-06-14 12:49:35,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 12:49:35,618 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 447 transitions, 6554 flow [2024-06-14 12:49:35,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:35,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:35,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:35,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:49:35,619 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:35,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2024732880, now seen corresponding path program 4 times [2024-06-14 12:49:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051027618] [2024-06-14 12:49:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:35,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:36,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051027618] [2024-06-14 12:49:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051027618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:36,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858297969] [2024-06-14 12:49:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:36,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:36,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 447 transitions, 6554 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:36,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:36,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:36,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:38,105 INFO L124 PetriNetUnfolderBase]: 3393/5297 cut-off events. [2024-06-14 12:49:38,106 INFO L125 PetriNetUnfolderBase]: For 469911/469915 co-relation queries the response was YES. [2024-06-14 12:49:38,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49822 conditions, 5297 events. 3393/5297 cut-off events. For 469911/469915 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30725 event pairs, 638 based on Foata normal form. 8/5305 useless extension candidates. Maximal degree in co-relation 49673. Up to 4933 conditions per place. [2024-06-14 12:49:38,184 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 419 selfloop transitions, 65 changer transitions 0/488 dead transitions. [2024-06-14 12:49:38,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 488 transitions, 8226 flow [2024-06-14 12:49:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:49:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:49:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:49:38,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 12:49:38,185 INFO L175 Difference]: Start difference. First operand has 321 places, 447 transitions, 6554 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:49:38,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 488 transitions, 8226 flow [2024-06-14 12:49:40,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 488 transitions, 8043 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:40,284 INFO L231 Difference]: Finished difference. Result has 326 places, 460 transitions, 6935 flow [2024-06-14 12:49:40,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6935, PETRI_PLACES=326, PETRI_TRANSITIONS=460} [2024-06-14 12:49:40,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 12:49:40,285 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 460 transitions, 6935 flow [2024-06-14 12:49:40,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:40,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:40,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:40,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:49:40,285 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:40,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -637494679, now seen corresponding path program 10 times [2024-06-14 12:49:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809265522] [2024-06-14 12:49:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:40,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809265522] [2024-06-14 12:49:41,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809265522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:41,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:41,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:41,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614326332] [2024-06-14 12:49:41,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:41,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:41,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:41,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:41,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 460 transitions, 6935 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:41,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:41,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:41,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:42,880 INFO L124 PetriNetUnfolderBase]: 3387/5293 cut-off events. [2024-06-14 12:49:42,880 INFO L125 PetriNetUnfolderBase]: For 476098/476102 co-relation queries the response was YES. [2024-06-14 12:49:42,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50344 conditions, 5293 events. 3387/5293 cut-off events. For 476098/476102 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30750 event pairs, 645 based on Foata normal form. 6/5299 useless extension candidates. Maximal degree in co-relation 50192. Up to 5015 conditions per place. [2024-06-14 12:49:42,951 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 46 changer transitions 0/482 dead transitions. [2024-06-14 12:49:42,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 482 transitions, 8033 flow [2024-06-14 12:49:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:49:42,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:49:42,953 INFO L175 Difference]: Start difference. First operand has 326 places, 460 transitions, 6935 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:49:42,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 482 transitions, 8033 flow [2024-06-14 12:49:44,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 482 transitions, 7667 flow, removed 160 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:44,898 INFO L231 Difference]: Finished difference. Result has 330 places, 460 transitions, 6667 flow [2024-06-14 12:49:44,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6667, PETRI_PLACES=330, PETRI_TRANSITIONS=460} [2024-06-14 12:49:44,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 12:49:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 460 transitions, 6667 flow [2024-06-14 12:49:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:44,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:49:44,899 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:44,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash -637494462, now seen corresponding path program 5 times [2024-06-14 12:49:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:44,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948618145] [2024-06-14 12:49:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:44,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:45,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948618145] [2024-06-14 12:49:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948618145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:45,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130419462] [2024-06-14 12:49:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:45,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:45,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:45,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:45,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 460 transitions, 6667 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:45,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:45,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:45,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:47,297 INFO L124 PetriNetUnfolderBase]: 3375/5275 cut-off events. [2024-06-14 12:49:47,297 INFO L125 PetriNetUnfolderBase]: For 470589/470593 co-relation queries the response was YES. [2024-06-14 12:49:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49391 conditions, 5275 events. 3375/5275 cut-off events. For 470589/470593 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30621 event pairs, 643 based on Foata normal form. 8/5283 useless extension candidates. Maximal degree in co-relation 49237. Up to 4991 conditions per place. [2024-06-14 12:49:47,375 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 431 selfloop transitions, 47 changer transitions 0/482 dead transitions. [2024-06-14 12:49:47,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 482 transitions, 7765 flow [2024-06-14 12:49:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:49:47,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 12:49:47,376 INFO L175 Difference]: Start difference. First operand has 330 places, 460 transitions, 6667 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:49:47,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 482 transitions, 7765 flow [2024-06-14 12:49:49,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 482 transitions, 7621 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:49,564 INFO L231 Difference]: Finished difference. Result has 333 places, 460 transitions, 6624 flow [2024-06-14 12:49:49,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6624, PETRI_PLACES=333, PETRI_TRANSITIONS=460} [2024-06-14 12:49:49,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 12:49:49,564 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 460 transitions, 6624 flow [2024-06-14 12:49:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:49,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:49,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:49,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:49:49,565 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:49,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash -637487518, now seen corresponding path program 5 times [2024-06-14 12:49:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:49,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792526686] [2024-06-14 12:49:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792526686] [2024-06-14 12:49:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792526686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:50,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176354768] [2024-06-14 12:49:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:50,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:50,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:50,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 460 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:50,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:50,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:50,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:52,095 INFO L124 PetriNetUnfolderBase]: 3419/5341 cut-off events. [2024-06-14 12:49:52,095 INFO L125 PetriNetUnfolderBase]: For 510092/510092 co-relation queries the response was YES. [2024-06-14 12:49:52,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50311 conditions, 5341 events. 3419/5341 cut-off events. For 510092/510092 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 31085 event pairs, 660 based on Foata normal form. 12/5352 useless extension candidates. Maximal degree in co-relation 50156. Up to 5009 conditions per place. [2024-06-14 12:49:52,187 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 44 changer transitions 0/486 dead transitions. [2024-06-14 12:49:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 486 transitions, 7918 flow [2024-06-14 12:49:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:49:52,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:49:52,188 INFO L175 Difference]: Start difference. First operand has 333 places, 460 transitions, 6624 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:49:52,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 486 transitions, 7918 flow [2024-06-14 12:49:54,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 486 transitions, 7781 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:49:54,327 INFO L231 Difference]: Finished difference. Result has 333 places, 461 transitions, 6624 flow [2024-06-14 12:49:54,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6624, PETRI_PLACES=333, PETRI_TRANSITIONS=461} [2024-06-14 12:49:54,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 12:49:54,327 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 461 transitions, 6624 flow [2024-06-14 12:49:54,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:54,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:54,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:49:54,328 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:54,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -978499109, now seen corresponding path program 11 times [2024-06-14 12:49:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836253610] [2024-06-14 12:49:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:55,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:55,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836253610] [2024-06-14 12:49:55,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836253610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:55,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:55,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35025160] [2024-06-14 12:49:55,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:55,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:49:55,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 461 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:55,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:55,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:49:55,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:57,367 INFO L124 PetriNetUnfolderBase]: 3568/5579 cut-off events. [2024-06-14 12:49:57,368 INFO L125 PetriNetUnfolderBase]: For 544645/544649 co-relation queries the response was YES. [2024-06-14 12:49:57,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53683 conditions, 5579 events. 3568/5579 cut-off events. For 544645/544649 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32712 event pairs, 662 based on Foata normal form. 10/5589 useless extension candidates. Maximal degree in co-relation 53527. Up to 4838 conditions per place. [2024-06-14 12:49:57,442 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 394 selfloop transitions, 123 changer transitions 0/521 dead transitions. [2024-06-14 12:49:57,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 521 transitions, 8766 flow [2024-06-14 12:49:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:49:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:49:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-14 12:49:57,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-14 12:49:57,443 INFO L175 Difference]: Start difference. First operand has 333 places, 461 transitions, 6624 flow. Second operand 11 states and 200 transitions. [2024-06-14 12:49:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 521 transitions, 8766 flow [2024-06-14 12:49:59,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 521 transitions, 8647 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:59,738 INFO L231 Difference]: Finished difference. Result has 340 places, 489 transitions, 7439 flow [2024-06-14 12:49:59,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7439, PETRI_PLACES=340, PETRI_TRANSITIONS=489} [2024-06-14 12:49:59,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 12:49:59,739 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 489 transitions, 7439 flow [2024-06-14 12:49:59,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:59,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:59,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:49:59,739 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:59,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2127832045, now seen corresponding path program 12 times [2024-06-14 12:49:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134156888] [2024-06-14 12:49:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134156888] [2024-06-14 12:50:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134156888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:01,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:01,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748532554] [2024-06-14 12:50:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:01,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:01,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:01,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:01,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 489 transitions, 7439 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:01,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:01,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:02,646 INFO L124 PetriNetUnfolderBase]: 3556/5563 cut-off events. [2024-06-14 12:50:02,647 INFO L125 PetriNetUnfolderBase]: For 540410/540414 co-relation queries the response was YES. [2024-06-14 12:50:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54146 conditions, 5563 events. 3556/5563 cut-off events. For 540410/540414 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 32650 event pairs, 665 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 53987. Up to 5001 conditions per place. [2024-06-14 12:50:02,734 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 418 selfloop transitions, 97 changer transitions 0/519 dead transitions. [2024-06-14 12:50:02,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 8832 flow [2024-06-14 12:50:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:50:02,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:50:02,735 INFO L175 Difference]: Start difference. First operand has 340 places, 489 transitions, 7439 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:50:02,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 8832 flow [2024-06-14 12:50:04,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 519 transitions, 8294 flow, removed 219 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:04,533 INFO L231 Difference]: Finished difference. Result has 346 places, 496 transitions, 7401 flow [2024-06-14 12:50:04,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7401, PETRI_PLACES=346, PETRI_TRANSITIONS=496} [2024-06-14 12:50:04,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 12:50:04,533 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 496 transitions, 7401 flow [2024-06-14 12:50:04,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:04,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:04,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:04,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:50:04,534 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:04,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:04,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2127832262, now seen corresponding path program 6 times [2024-06-14 12:50:04,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:04,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073876569] [2024-06-14 12:50:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:04,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:05,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073876569] [2024-06-14 12:50:05,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073876569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:05,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:05,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32864091] [2024-06-14 12:50:05,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:05,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:05,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 496 transitions, 7401 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:07,043 INFO L124 PetriNetUnfolderBase]: 3576/5585 cut-off events. [2024-06-14 12:50:07,043 INFO L125 PetriNetUnfolderBase]: For 536587/536591 co-relation queries the response was YES. [2024-06-14 12:50:07,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53712 conditions, 5585 events. 3576/5585 cut-off events. For 536587/536591 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 32707 event pairs, 663 based on Foata normal form. 8/5593 useless extension candidates. Maximal degree in co-relation 53551. Up to 5072 conditions per place. [2024-06-14 12:50:07,133 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 437 selfloop transitions, 82 changer transitions 0/523 dead transitions. [2024-06-14 12:50:07,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 523 transitions, 8671 flow [2024-06-14 12:50:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:50:07,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:50:07,134 INFO L175 Difference]: Start difference. First operand has 346 places, 496 transitions, 7401 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:50:07,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 523 transitions, 8671 flow [2024-06-14 12:50:09,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 523 transitions, 8434 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 12:50:09,444 INFO L231 Difference]: Finished difference. Result has 350 places, 499 transitions, 7458 flow [2024-06-14 12:50:09,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7164, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7458, PETRI_PLACES=350, PETRI_TRANSITIONS=499} [2024-06-14 12:50:09,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 12:50:09,444 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 499 transitions, 7458 flow [2024-06-14 12:50:09,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:09,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:09,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:09,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:50:09,445 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:09,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1898374334, now seen corresponding path program 7 times [2024-06-14 12:50:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303065201] [2024-06-14 12:50:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303065201] [2024-06-14 12:50:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303065201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:10,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:10,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:10,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591031399] [2024-06-14 12:50:10,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:10,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:10,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 499 transitions, 7458 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:10,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:10,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:10,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:11,974 INFO L124 PetriNetUnfolderBase]: 3596/5615 cut-off events. [2024-06-14 12:50:11,974 INFO L125 PetriNetUnfolderBase]: For 552019/552023 co-relation queries the response was YES. [2024-06-14 12:50:12,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54341 conditions, 5615 events. 3596/5615 cut-off events. For 552019/552023 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 32973 event pairs, 669 based on Foata normal form. 8/5623 useless extension candidates. Maximal degree in co-relation 54180. Up to 5030 conditions per place. [2024-06-14 12:50:12,054 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 427 selfloop transitions, 95 changer transitions 0/526 dead transitions. [2024-06-14 12:50:12,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 526 transitions, 8740 flow [2024-06-14 12:50:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:50:12,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:50:12,056 INFO L175 Difference]: Start difference. First operand has 350 places, 499 transitions, 7458 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:50:12,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 526 transitions, 8740 flow [2024-06-14 12:50:14,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 526 transitions, 8472 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:14,460 INFO L231 Difference]: Finished difference. Result has 353 places, 502 transitions, 7517 flow [2024-06-14 12:50:14,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7517, PETRI_PLACES=353, PETRI_TRANSITIONS=502} [2024-06-14 12:50:14,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 12:50:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 502 transitions, 7517 flow [2024-06-14 12:50:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:50:14,461 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:14,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1783083164, now seen corresponding path program 8 times [2024-06-14 12:50:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573643830] [2024-06-14 12:50:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:15,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:15,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573643830] [2024-06-14 12:50:15,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573643830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:15,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:15,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:15,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489928251] [2024-06-14 12:50:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:15,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:15,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:15,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:15,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 502 transitions, 7517 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:15,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:15,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:15,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:17,059 INFO L124 PetriNetUnfolderBase]: 3712/5783 cut-off events. [2024-06-14 12:50:17,059 INFO L125 PetriNetUnfolderBase]: For 624105/624109 co-relation queries the response was YES. [2024-06-14 12:50:17,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58325 conditions, 5783 events. 3712/5783 cut-off events. For 624105/624109 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33999 event pairs, 585 based on Foata normal form. 8/5791 useless extension candidates. Maximal degree in co-relation 58163. Up to 4566 conditions per place. [2024-06-14 12:50:17,137 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 350 selfloop transitions, 190 changer transitions 0/544 dead transitions. [2024-06-14 12:50:17,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 544 transitions, 9710 flow [2024-06-14 12:50:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:50:17,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-14 12:50:17,138 INFO L175 Difference]: Start difference. First operand has 353 places, 502 transitions, 7517 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:50:17,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 544 transitions, 9710 flow [2024-06-14 12:50:19,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 544 transitions, 9445 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:19,734 INFO L231 Difference]: Finished difference. Result has 356 places, 514 transitions, 8203 flow [2024-06-14 12:50:19,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7252, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8203, PETRI_PLACES=356, PETRI_TRANSITIONS=514} [2024-06-14 12:50:19,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 12:50:19,734 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 514 transitions, 8203 flow [2024-06-14 12:50:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:19,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:19,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:50:19,735 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:19,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:19,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1783350291, now seen corresponding path program 13 times [2024-06-14 12:50:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934372545] [2024-06-14 12:50:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:20,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934372545] [2024-06-14 12:50:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934372545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:20,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:20,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:20,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915178378] [2024-06-14 12:50:20,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:21,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:21,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 514 transitions, 8203 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:21,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:21,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:22,550 INFO L124 PetriNetUnfolderBase]: 3738/5825 cut-off events. [2024-06-14 12:50:22,550 INFO L125 PetriNetUnfolderBase]: For 650492/650496 co-relation queries the response was YES. [2024-06-14 12:50:22,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60067 conditions, 5825 events. 3738/5825 cut-off events. For 650492/650496 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34356 event pairs, 594 based on Foata normal form. 6/5831 useless extension candidates. Maximal degree in co-relation 59904. Up to 5032 conditions per place. [2024-06-14 12:50:22,637 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 393 selfloop transitions, 152 changer transitions 0/549 dead transitions. [2024-06-14 12:50:22,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 9940 flow [2024-06-14 12:50:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:50:22,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:50:22,638 INFO L175 Difference]: Start difference. First operand has 356 places, 514 transitions, 8203 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:50:22,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 9940 flow [2024-06-14 12:50:25,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 549 transitions, 9628 flow, removed 123 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:25,467 INFO L231 Difference]: Finished difference. Result has 363 places, 524 transitions, 8593 flow [2024-06-14 12:50:25,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8593, PETRI_PLACES=363, PETRI_TRANSITIONS=524} [2024-06-14 12:50:25,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-14 12:50:25,467 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 524 transitions, 8593 flow [2024-06-14 12:50:25,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:25,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:25,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:50:25,468 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:25,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1783350074, now seen corresponding path program 9 times [2024-06-14 12:50:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:25,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882977687] [2024-06-14 12:50:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:26,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882977687] [2024-06-14 12:50:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882977687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:26,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072538257] [2024-06-14 12:50:26,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:26,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:26,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 524 transitions, 8593 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:26,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:26,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:26,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:27,999 INFO L124 PetriNetUnfolderBase]: 3742/5831 cut-off events. [2024-06-14 12:50:27,999 INFO L125 PetriNetUnfolderBase]: For 653211/653215 co-relation queries the response was YES. [2024-06-14 12:50:28,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60054 conditions, 5831 events. 3742/5831 cut-off events. For 653211/653215 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34279 event pairs, 601 based on Foata normal form. 8/5839 useless extension candidates. Maximal degree in co-relation 59888. Up to 4609 conditions per place. [2024-06-14 12:50:28,080 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 361 selfloop transitions, 192 changer transitions 0/557 dead transitions. [2024-06-14 12:50:28,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 557 transitions, 10360 flow [2024-06-14 12:50:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:50:28,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 12:50:28,081 INFO L175 Difference]: Start difference. First operand has 363 places, 524 transitions, 8593 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:50:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 557 transitions, 10360 flow [2024-06-14 12:50:30,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 557 transitions, 10131 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:30,573 INFO L231 Difference]: Finished difference. Result has 368 places, 527 transitions, 8848 flow [2024-06-14 12:50:30,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8364, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8848, PETRI_PLACES=368, PETRI_TRANSITIONS=527} [2024-06-14 12:50:30,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 12:50:30,574 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 527 transitions, 8848 flow [2024-06-14 12:50:30,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:30,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:30,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:50:30,575 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:30,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1617703500, now seen corresponding path program 10 times [2024-06-14 12:50:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:30,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626579082] [2024-06-14 12:50:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626579082] [2024-06-14 12:50:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626579082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:31,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:31,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819320537] [2024-06-14 12:50:31,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:31,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:31,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:31,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 527 transitions, 8848 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:31,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:31,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:31,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:33,364 INFO L124 PetriNetUnfolderBase]: 3784/5889 cut-off events. [2024-06-14 12:50:33,364 INFO L125 PetriNetUnfolderBase]: For 677494/677498 co-relation queries the response was YES. [2024-06-14 12:50:33,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61939 conditions, 5889 events. 3784/5889 cut-off events. For 677494/677498 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 34657 event pairs, 628 based on Foata normal form. 6/5895 useless extension candidates. Maximal degree in co-relation 61771. Up to 5354 conditions per place. [2024-06-14 12:50:33,462 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 453 selfloop transitions, 100 changer transitions 0/557 dead transitions. [2024-06-14 12:50:33,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 557 transitions, 10565 flow [2024-06-14 12:50:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:50:33,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:50:33,463 INFO L175 Difference]: Start difference. First operand has 368 places, 527 transitions, 8848 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:50:33,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 557 transitions, 10565 flow [2024-06-14 12:50:36,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 557 transitions, 10267 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:50:36,514 INFO L231 Difference]: Finished difference. Result has 373 places, 534 transitions, 9075 flow [2024-06-14 12:50:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8555, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9075, PETRI_PLACES=373, PETRI_TRANSITIONS=534} [2024-06-14 12:50:36,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 12:50:36,514 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 534 transitions, 9075 flow [2024-06-14 12:50:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:36,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:36,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:36,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:50:36,514 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:36,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -428746725, now seen corresponding path program 14 times [2024-06-14 12:50:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:36,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452792766] [2024-06-14 12:50:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:37,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452792766] [2024-06-14 12:50:37,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452792766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:37,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:37,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367012396] [2024-06-14 12:50:37,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:37,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:37,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:37,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:37,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 534 transitions, 9075 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:37,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:37,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:37,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:39,304 INFO L124 PetriNetUnfolderBase]: 3810/5933 cut-off events. [2024-06-14 12:50:39,304 INFO L125 PetriNetUnfolderBase]: For 702294/702298 co-relation queries the response was YES. [2024-06-14 12:50:39,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62715 conditions, 5933 events. 3810/5933 cut-off events. For 702294/702298 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35026 event pairs, 628 based on Foata normal form. 6/5939 useless extension candidates. Maximal degree in co-relation 62545. Up to 5429 conditions per place. [2024-06-14 12:50:39,404 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 466 selfloop transitions, 93 changer transitions 0/563 dead transitions. [2024-06-14 12:50:39,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 563 transitions, 10814 flow [2024-06-14 12:50:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:39,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:50:39,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 12:50:39,405 INFO L175 Difference]: Start difference. First operand has 373 places, 534 transitions, 9075 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:50:39,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 563 transitions, 10814 flow [2024-06-14 12:50:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 563 transitions, 10575 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-14 12:50:43,332 INFO L231 Difference]: Finished difference. Result has 377 places, 540 transitions, 9334 flow [2024-06-14 12:50:43,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9334, PETRI_PLACES=377, PETRI_TRANSITIONS=540} [2024-06-14 12:50:43,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 12:50:43,333 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 540 transitions, 9334 flow [2024-06-14 12:50:43,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:43,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:43,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:43,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:50:43,333 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:43,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1625055646, now seen corresponding path program 6 times [2024-06-14 12:50:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:43,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855209397] [2024-06-14 12:50:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:44,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855209397] [2024-06-14 12:50:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855209397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:44,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:44,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500342735] [2024-06-14 12:50:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:44,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:44,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:44,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 540 transitions, 9334 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:44,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:44,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:44,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:46,066 INFO L124 PetriNetUnfolderBase]: 3854/5997 cut-off events. [2024-06-14 12:50:46,067 INFO L125 PetriNetUnfolderBase]: For 758980/758980 co-relation queries the response was YES. [2024-06-14 12:50:46,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63878 conditions, 5997 events. 3854/5997 cut-off events. For 758980/758980 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35384 event pairs, 627 based on Foata normal form. 12/6008 useless extension candidates. Maximal degree in co-relation 63706. Up to 5488 conditions per place. [2024-06-14 12:50:46,153 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 84 changer transitions 0/567 dead transitions. [2024-06-14 12:50:46,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 567 transitions, 10827 flow [2024-06-14 12:50:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:50:46,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:50:46,154 INFO L175 Difference]: Start difference. First operand has 377 places, 540 transitions, 9334 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:50:46,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 567 transitions, 10827 flow [2024-06-14 12:50:49,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 567 transitions, 10594 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-14 12:50:49,427 INFO L231 Difference]: Finished difference. Result has 380 places, 541 transitions, 9320 flow [2024-06-14 12:50:49,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9320, PETRI_PLACES=380, PETRI_TRANSITIONS=541} [2024-06-14 12:50:49,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-14 12:50:49,427 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 541 transitions, 9320 flow [2024-06-14 12:50:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:49,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:49,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:49,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:50:49,427 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:49,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1617710940, now seen corresponding path program 11 times [2024-06-14 12:50:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:49,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052528794] [2024-06-14 12:50:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:49,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:50,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:50,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052528794] [2024-06-14 12:50:50,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052528794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:50,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:50,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925248466] [2024-06-14 12:50:50,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:50,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:50,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:50,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 541 transitions, 9320 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:50,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:50,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:52,036 INFO L124 PetriNetUnfolderBase]: 3922/6095 cut-off events. [2024-06-14 12:50:52,036 INFO L125 PetriNetUnfolderBase]: For 771698/771702 co-relation queries the response was YES. [2024-06-14 12:50:52,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66056 conditions, 6095 events. 3922/6095 cut-off events. For 771698/771702 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36059 event pairs, 634 based on Foata normal form. 8/6103 useless extension candidates. Maximal degree in co-relation 65882. Up to 5475 conditions per place. [2024-06-14 12:50:52,141 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 466 selfloop transitions, 108 changer transitions 0/578 dead transitions. [2024-06-14 12:50:52,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 578 transitions, 11508 flow [2024-06-14 12:50:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:50:52,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:50:52,142 INFO L175 Difference]: Start difference. First operand has 380 places, 541 transitions, 9320 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:50:52,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 578 transitions, 11508 flow [2024-06-14 12:50:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 578 transitions, 11321 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:55,657 INFO L231 Difference]: Finished difference. Result has 384 places, 553 transitions, 9909 flow [2024-06-14 12:50:55,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9909, PETRI_PLACES=384, PETRI_TRANSITIONS=553} [2024-06-14 12:50:55,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 12:50:55,658 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 553 transitions, 9909 flow [2024-06-14 12:50:55,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:55,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:55,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:55,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:50:55,658 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:55,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1625062807, now seen corresponding path program 15 times [2024-06-14 12:50:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:55,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314131879] [2024-06-14 12:50:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314131879] [2024-06-14 12:50:56,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314131879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:56,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:56,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138022763] [2024-06-14 12:50:56,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:56,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:56,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:56,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:56,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 553 transitions, 9909 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:56,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:56,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:56,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:58,577 INFO L124 PetriNetUnfolderBase]: 3916/6087 cut-off events. [2024-06-14 12:50:58,577 INFO L125 PetriNetUnfolderBase]: For 765282/765286 co-relation queries the response was YES. [2024-06-14 12:50:58,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65906 conditions, 6087 events. 3916/6087 cut-off events. For 765282/765286 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36006 event pairs, 630 based on Foata normal form. 6/6093 useless extension candidates. Maximal degree in co-relation 65730. Up to 5658 conditions per place. [2024-06-14 12:50:58,674 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 74 changer transitions 0/576 dead transitions. [2024-06-14 12:50:58,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 576 transitions, 11212 flow [2024-06-14 12:50:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:50:58,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 12:50:58,675 INFO L175 Difference]: Start difference. First operand has 384 places, 553 transitions, 9909 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:50:58,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 576 transitions, 11212 flow [2024-06-14 12:51:02,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 576 transitions, 10865 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:02,144 INFO L231 Difference]: Finished difference. Result has 389 places, 553 transitions, 9716 flow [2024-06-14 12:51:02,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9562, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9716, PETRI_PLACES=389, PETRI_TRANSITIONS=553} [2024-06-14 12:51:02,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 12:51:02,144 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 553 transitions, 9716 flow [2024-06-14 12:51:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:02,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:02,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:02,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:51:02,145 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:02,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:02,145 INFO L85 PathProgramCache]: Analyzing trace with hash -436098158, now seen corresponding path program 12 times [2024-06-14 12:51:02,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:02,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609837003] [2024-06-14 12:51:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:02,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:03,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609837003] [2024-06-14 12:51:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609837003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:03,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:03,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463275439] [2024-06-14 12:51:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:03,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:03,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:03,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 553 transitions, 9716 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:03,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:03,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:03,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:04,799 INFO L124 PetriNetUnfolderBase]: 3924/6099 cut-off events. [2024-06-14 12:51:04,799 INFO L125 PetriNetUnfolderBase]: For 781814/781818 co-relation queries the response was YES. [2024-06-14 12:51:04,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65732 conditions, 6099 events. 3924/6099 cut-off events. For 781814/781818 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 36141 event pairs, 630 based on Foata normal form. 12/6111 useless extension candidates. Maximal degree in co-relation 65554. Up to 5646 conditions per place. [2024-06-14 12:51:04,884 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 499 selfloop transitions, 78 changer transitions 0/581 dead transitions. [2024-06-14 12:51:04,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 581 transitions, 11234 flow [2024-06-14 12:51:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:51:04,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:51:04,885 INFO L175 Difference]: Start difference. First operand has 389 places, 553 transitions, 9716 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:51:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 581 transitions, 11234 flow [2024-06-14 12:51:08,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 581 transitions, 10906 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:08,836 INFO L231 Difference]: Finished difference. Result has 390 places, 557 transitions, 9758 flow [2024-06-14 12:51:08,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9398, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9758, PETRI_PLACES=390, PETRI_TRANSITIONS=557} [2024-06-14 12:51:08,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 12:51:08,837 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 557 transitions, 9758 flow [2024-06-14 12:51:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:08,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:08,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:08,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:51:08,837 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:08,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1610770846, now seen corresponding path program 7 times [2024-06-14 12:51:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442742407] [2024-06-14 12:51:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:08,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:09,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442742407] [2024-06-14 12:51:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442742407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:09,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480667064] [2024-06-14 12:51:09,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:09,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:09,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:09,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 557 transitions, 9758 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:09,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:09,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:09,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:11,640 INFO L124 PetriNetUnfolderBase]: 3952/6143 cut-off events. [2024-06-14 12:51:11,641 INFO L125 PetriNetUnfolderBase]: For 794830/794830 co-relation queries the response was YES. [2024-06-14 12:51:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66259 conditions, 6143 events. 3952/6143 cut-off events. For 794830/794830 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 36350 event pairs, 629 based on Foata normal form. 8/6150 useless extension candidates. Maximal degree in co-relation 66080. Up to 5482 conditions per place. [2024-06-14 12:51:11,737 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 494 selfloop transitions, 88 changer transitions 0/586 dead transitions. [2024-06-14 12:51:11,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 586 transitions, 11375 flow [2024-06-14 12:51:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:51:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 12:51:11,738 INFO L175 Difference]: Start difference. First operand has 390 places, 557 transitions, 9758 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:51:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 586 transitions, 11375 flow [2024-06-14 12:51:15,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 586 transitions, 11087 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:15,879 INFO L231 Difference]: Finished difference. Result has 391 places, 558 transitions, 9698 flow [2024-06-14 12:51:15,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9470, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9698, PETRI_PLACES=391, PETRI_TRANSITIONS=558} [2024-06-14 12:51:15,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 12:51:15,880 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 558 transitions, 9698 flow [2024-06-14 12:51:15,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:15,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:15,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:15,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:51:15,881 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:15,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1618427256, now seen corresponding path program 1 times [2024-06-14 12:51:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:15,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683572044] [2024-06-14 12:51:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:16,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:16,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683572044] [2024-06-14 12:51:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683572044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:16,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:16,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397740411] [2024-06-14 12:51:16,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:16,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:16,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:16,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 558 transitions, 9698 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:16,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:16,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:16,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:18,518 INFO L124 PetriNetUnfolderBase]: 3949/6135 cut-off events. [2024-06-14 12:51:18,518 INFO L125 PetriNetUnfolderBase]: For 772594/772594 co-relation queries the response was YES. [2024-06-14 12:51:18,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66036 conditions, 6135 events. 3949/6135 cut-off events. For 772594/772594 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36310 event pairs, 758 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 65856. Up to 5861 conditions per place. [2024-06-14 12:51:18,614 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 529 selfloop transitions, 40 changer transitions 0/573 dead transitions. [2024-06-14 12:51:18,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 573 transitions, 11050 flow [2024-06-14 12:51:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:51:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:51:18,615 INFO L175 Difference]: Start difference. First operand has 391 places, 558 transitions, 9698 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:51:18,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 573 transitions, 11050 flow [2024-06-14 12:51:22,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 573 transitions, 10848 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:22,967 INFO L231 Difference]: Finished difference. Result has 393 places, 561 transitions, 9762 flow [2024-06-14 12:51:22,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9496, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9762, PETRI_PLACES=393, PETRI_TRANSITIONS=561} [2024-06-14 12:51:22,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 12:51:22,967 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 561 transitions, 9762 flow [2024-06-14 12:51:22,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:22,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:22,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:22,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:51:22,968 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:22,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1995151382, now seen corresponding path program 8 times [2024-06-14 12:51:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:22,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222469551] [2024-06-14 12:51:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:23,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222469551] [2024-06-14 12:51:23,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222469551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:23,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:23,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407718400] [2024-06-14 12:51:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:23,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:23,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:23,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 561 transitions, 9762 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:23,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:23,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:23,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:25,546 INFO L124 PetriNetUnfolderBase]: 3977/6187 cut-off events. [2024-06-14 12:51:25,546 INFO L125 PetriNetUnfolderBase]: For 819215/819219 co-relation queries the response was YES. [2024-06-14 12:51:25,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66687 conditions, 6187 events. 3977/6187 cut-off events. For 819215/819219 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36738 event pairs, 751 based on Foata normal form. 12/6199 useless extension candidates. Maximal degree in co-relation 66506. Up to 5915 conditions per place. [2024-06-14 12:51:25,649 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 28 changer transitions 0/580 dead transitions. [2024-06-14 12:51:25,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 580 transitions, 11178 flow [2024-06-14 12:51:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:51:25,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:51:25,650 INFO L175 Difference]: Start difference. First operand has 393 places, 561 transitions, 9762 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:51:25,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 580 transitions, 11178 flow [2024-06-14 12:51:29,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 580 transitions, 10939 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:29,959 INFO L231 Difference]: Finished difference. Result has 396 places, 564 transitions, 9704 flow [2024-06-14 12:51:29,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9523, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9704, PETRI_PLACES=396, PETRI_TRANSITIONS=564} [2024-06-14 12:51:29,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-14 12:51:29,959 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 564 transitions, 9704 flow [2024-06-14 12:51:29,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:29,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:29,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:51:29,960 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1843119884, now seen corresponding path program 9 times [2024-06-14 12:51:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926926520] [2024-06-14 12:51:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:29,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:30,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:30,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926926520] [2024-06-14 12:51:30,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926926520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:30,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:30,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690108382] [2024-06-14 12:51:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:30,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:30,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:30,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 564 transitions, 9704 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:30,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:30,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:30,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:32,545 INFO L124 PetriNetUnfolderBase]: 4005/6237 cut-off events. [2024-06-14 12:51:32,546 INFO L125 PetriNetUnfolderBase]: For 841003/841007 co-relation queries the response was YES. [2024-06-14 12:51:32,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67540 conditions, 6237 events. 4005/6237 cut-off events. For 841003/841007 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37145 event pairs, 724 based on Foata normal form. 12/6249 useless extension candidates. Maximal degree in co-relation 67357. Up to 5939 conditions per place. [2024-06-14 12:51:32,663 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 32 changer transitions 0/584 dead transitions. [2024-06-14 12:51:32,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 584 transitions, 11136 flow [2024-06-14 12:51:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:51:32,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:51:32,664 INFO L175 Difference]: Start difference. First operand has 396 places, 564 transitions, 9704 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:51:32,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 584 transitions, 11136 flow [2024-06-14 12:51:37,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 584 transitions, 10999 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:37,900 INFO L231 Difference]: Finished difference. Result has 400 places, 567 transitions, 9760 flow [2024-06-14 12:51:37,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9567, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9760, PETRI_PLACES=400, PETRI_TRANSITIONS=567} [2024-06-14 12:51:37,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 12:51:37,901 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 567 transitions, 9760 flow [2024-06-14 12:51:37,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:37,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:37,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:51:37,901 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:37,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1837405964, now seen corresponding path program 10 times [2024-06-14 12:51:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912704950] [2024-06-14 12:51:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912704950] [2024-06-14 12:51:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912704950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963226113] [2024-06-14 12:51:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:38,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:38,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 567 transitions, 9760 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:38,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:38,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:38,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:40,498 INFO L124 PetriNetUnfolderBase]: 4033/6287 cut-off events. [2024-06-14 12:51:40,498 INFO L125 PetriNetUnfolderBase]: For 860415/860419 co-relation queries the response was YES. [2024-06-14 12:51:40,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68248 conditions, 6287 events. 4033/6287 cut-off events. For 860415/860419 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37545 event pairs, 727 based on Foata normal form. 12/6299 useless extension candidates. Maximal degree in co-relation 68063. Up to 5879 conditions per place. [2024-06-14 12:51:40,600 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 36 changer transitions 0/588 dead transitions. [2024-06-14 12:51:40,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 588 transitions, 11260 flow [2024-06-14 12:51:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:51:40,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:51:40,601 INFO L175 Difference]: Start difference. First operand has 400 places, 567 transitions, 9760 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:51:40,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 588 transitions, 11260 flow [2024-06-14 12:51:44,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 588 transitions, 11111 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:44,843 INFO L231 Difference]: Finished difference. Result has 403 places, 568 transitions, 9743 flow [2024-06-14 12:51:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9611, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9743, PETRI_PLACES=403, PETRI_TRANSITIONS=568} [2024-06-14 12:51:44,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 12:51:44,843 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 568 transitions, 9743 flow [2024-06-14 12:51:44,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:44,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:44,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:51:44,843 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:44,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1994854712, now seen corresponding path program 11 times [2024-06-14 12:51:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953188845] [2024-06-14 12:51:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:45,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953188845] [2024-06-14 12:51:45,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953188845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:45,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:45,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:45,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419493823] [2024-06-14 12:51:45,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:45,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:45,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:45,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:45,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 568 transitions, 9743 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:45,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:47,601 INFO L124 PetriNetUnfolderBase]: 4077/6351 cut-off events. [2024-06-14 12:51:47,601 INFO L125 PetriNetUnfolderBase]: For 902692/902696 co-relation queries the response was YES. [2024-06-14 12:51:47,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69266 conditions, 6351 events. 4077/6351 cut-off events. For 902692/902696 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 37992 event pairs, 773 based on Foata normal form. 16/6367 useless extension candidates. Maximal degree in co-relation 69080. Up to 6031 conditions per place. [2024-06-14 12:51:47,708 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 553 selfloop transitions, 32 changer transitions 0/589 dead transitions. [2024-06-14 12:51:47,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 589 transitions, 11287 flow [2024-06-14 12:51:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:51:47,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:51:47,709 INFO L175 Difference]: Start difference. First operand has 403 places, 568 transitions, 9743 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:51:47,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 589 transitions, 11287 flow [2024-06-14 12:51:52,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 589 transitions, 11183 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:52,119 INFO L231 Difference]: Finished difference. Result has 405 places, 569 transitions, 9768 flow [2024-06-14 12:51:52,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9639, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9768, PETRI_PLACES=405, PETRI_TRANSITIONS=569} [2024-06-14 12:51:52,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-14 12:51:52,119 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 569 transitions, 9768 flow [2024-06-14 12:51:52,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:52,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:52,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:52,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:51:52,119 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:52,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:52,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1484562282, now seen corresponding path program 12 times [2024-06-14 12:51:52,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:52,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72203212] [2024-06-14 12:51:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:52,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:53,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:53,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72203212] [2024-06-14 12:51:53,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72203212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:53,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:53,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187293972] [2024-06-14 12:51:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:53,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:51:53,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 569 transitions, 9768 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:53,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:53,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:51:53,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:54,927 INFO L124 PetriNetUnfolderBase]: 4121/6419 cut-off events. [2024-06-14 12:51:54,928 INFO L125 PetriNetUnfolderBase]: For 928325/928325 co-relation queries the response was YES. [2024-06-14 12:51:55,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70318 conditions, 6419 events. 4121/6419 cut-off events. For 928325/928325 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38508 event pairs, 770 based on Foata normal form. 12/6430 useless extension candidates. Maximal degree in co-relation 70131. Up to 6045 conditions per place. [2024-06-14 12:51:55,036 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 544 selfloop transitions, 44 changer transitions 0/592 dead transitions. [2024-06-14 12:51:55,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 592 transitions, 11309 flow [2024-06-14 12:51:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:51:55,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:51:55,037 INFO L175 Difference]: Start difference. First operand has 405 places, 569 transitions, 9768 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:51:55,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 592 transitions, 11309 flow [2024-06-14 12:52:00,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 592 transitions, 11218 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:00,436 INFO L231 Difference]: Finished difference. Result has 407 places, 570 transitions, 9830 flow [2024-06-14 12:52:00,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9830, PETRI_PLACES=407, PETRI_TRANSITIONS=570} [2024-06-14 12:52:00,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-14 12:52:00,437 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 570 transitions, 9830 flow [2024-06-14 12:52:00,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:00,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:00,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:52:00,437 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:00,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1325587450, now seen corresponding path program 1 times [2024-06-14 12:52:00,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:00,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641884218] [2024-06-14 12:52:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:00,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:01,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:01,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641884218] [2024-06-14 12:52:01,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641884218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:01,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:01,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:01,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118004568] [2024-06-14 12:52:01,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:01,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:01,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:01,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 570 transitions, 9830 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:01,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:01,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:01,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:03,147 INFO L124 PetriNetUnfolderBase]: 4131/6431 cut-off events. [2024-06-14 12:52:03,147 INFO L125 PetriNetUnfolderBase]: For 889647/889651 co-relation queries the response was YES. [2024-06-14 12:52:03,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70521 conditions, 6431 events. 4131/6431 cut-off events. For 889647/889651 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38598 event pairs, 775 based on Foata normal form. 6/6437 useless extension candidates. Maximal degree in co-relation 70333. Up to 6149 conditions per place. [2024-06-14 12:52:03,260 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 546 selfloop transitions, 39 changer transitions 0/589 dead transitions. [2024-06-14 12:52:03,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 589 transitions, 11354 flow [2024-06-14 12:52:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:52:03,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:52:03,261 INFO L175 Difference]: Start difference. First operand has 407 places, 570 transitions, 9830 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:52:03,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 589 transitions, 11354 flow [2024-06-14 12:52:07,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 589 transitions, 11235 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:07,619 INFO L231 Difference]: Finished difference. Result has 409 places, 574 transitions, 10031 flow [2024-06-14 12:52:07,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9711, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10031, PETRI_PLACES=409, PETRI_TRANSITIONS=574} [2024-06-14 12:52:07,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-14 12:52:07,620 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 574 transitions, 10031 flow [2024-06-14 12:52:07,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:07,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:07,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:52:07,620 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:07,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2122981312, now seen corresponding path program 2 times [2024-06-14 12:52:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:07,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121240005] [2024-06-14 12:52:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121240005] [2024-06-14 12:52:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121240005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:08,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720136856] [2024-06-14 12:52:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:08,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:08,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:08,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:08,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:08,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 574 transitions, 10031 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:08,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:08,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:10,433 INFO L124 PetriNetUnfolderBase]: 4141/6445 cut-off events. [2024-06-14 12:52:10,433 INFO L125 PetriNetUnfolderBase]: For 908823/908827 co-relation queries the response was YES. [2024-06-14 12:52:10,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 6445 events. 4141/6445 cut-off events. For 908823/908827 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 38654 event pairs, 759 based on Foata normal form. 6/6451 useless extension candidates. Maximal degree in co-relation 70895. Up to 6112 conditions per place. [2024-06-14 12:52:10,557 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 59 changer transitions 0/596 dead transitions. [2024-06-14 12:52:10,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 596 transitions, 11669 flow [2024-06-14 12:52:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:52:10,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:52:10,558 INFO L175 Difference]: Start difference. First operand has 409 places, 574 transitions, 10031 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:52:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 596 transitions, 11669 flow [2024-06-14 12:52:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 596 transitions, 11404 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:15,301 INFO L231 Difference]: Finished difference. Result has 410 places, 578 transitions, 10134 flow [2024-06-14 12:52:15,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10134, PETRI_PLACES=410, PETRI_TRANSITIONS=578} [2024-06-14 12:52:15,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-14 12:52:15,301 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 578 transitions, 10134 flow [2024-06-14 12:52:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:15,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:15,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:15,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:52:15,302 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:15,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash 113725026, now seen corresponding path program 13 times [2024-06-14 12:52:15,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267136730] [2024-06-14 12:52:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:16,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267136730] [2024-06-14 12:52:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267136730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670312088] [2024-06-14 12:52:16,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:16,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:16,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 578 transitions, 10134 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:16,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:16,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:16,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:18,256 INFO L124 PetriNetUnfolderBase]: 4264/6644 cut-off events. [2024-06-14 12:52:18,257 INFO L125 PetriNetUnfolderBase]: For 1017707/1017707 co-relation queries the response was YES. [2024-06-14 12:52:18,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75414 conditions, 6644 events. 4264/6644 cut-off events. For 1017707/1017707 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40148 event pairs, 787 based on Foata normal form. 8/6651 useless extension candidates. Maximal degree in co-relation 75225. Up to 6013 conditions per place. [2024-06-14 12:52:18,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 552 selfloop transitions, 50 changer transitions 0/606 dead transitions. [2024-06-14 12:52:18,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 606 transitions, 12109 flow [2024-06-14 12:52:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:52:18,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:52:18,352 INFO L175 Difference]: Start difference. First operand has 410 places, 578 transitions, 10134 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:52:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 606 transitions, 12109 flow [2024-06-14 12:52:23,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 606 transitions, 11794 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:23,288 INFO L231 Difference]: Finished difference. Result has 412 places, 581 transitions, 10094 flow [2024-06-14 12:52:23,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10094, PETRI_PLACES=412, PETRI_TRANSITIONS=581} [2024-06-14 12:52:23,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 12:52:23,289 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 581 transitions, 10094 flow [2024-06-14 12:52:23,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:23,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:23,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:23,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:52:23,290 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:23,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1600328729, now seen corresponding path program 16 times [2024-06-14 12:52:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:23,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529799908] [2024-06-14 12:52:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:23,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529799908] [2024-06-14 12:52:24,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529799908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:24,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:24,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:24,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213245346] [2024-06-14 12:52:24,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:24,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:24,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:24,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 581 transitions, 10094 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:24,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:24,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:24,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:26,340 INFO L124 PetriNetUnfolderBase]: 4266/6641 cut-off events. [2024-06-14 12:52:26,340 INFO L125 PetriNetUnfolderBase]: For 986514/986514 co-relation queries the response was YES. [2024-06-14 12:52:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75421 conditions, 6641 events. 4266/6641 cut-off events. For 986514/986514 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 40102 event pairs, 831 based on Foata normal form. 2/6642 useless extension candidates. Maximal degree in co-relation 75231. Up to 6365 conditions per place. [2024-06-14 12:52:26,463 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 31 changer transitions 0/598 dead transitions. [2024-06-14 12:52:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 598 transitions, 11518 flow [2024-06-14 12:52:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:52:26,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:52:26,463 INFO L175 Difference]: Start difference. First operand has 412 places, 581 transitions, 10094 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:52:26,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 598 transitions, 11518 flow [2024-06-14 12:52:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 598 transitions, 11426 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:52:31,601 INFO L231 Difference]: Finished difference. Result has 417 places, 584 transitions, 10254 flow [2024-06-14 12:52:31,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10002, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10254, PETRI_PLACES=417, PETRI_TRANSITIONS=584} [2024-06-14 12:52:31,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-14 12:52:31,601 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 584 transitions, 10254 flow [2024-06-14 12:52:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:31,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:31,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:31,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:52:31,602 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:31,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1491027363, now seen corresponding path program 17 times [2024-06-14 12:52:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468103737] [2024-06-14 12:52:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468103737] [2024-06-14 12:52:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468103737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:32,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577055199] [2024-06-14 12:52:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:32,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:32,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 584 transitions, 10254 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:32,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:32,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:34,730 INFO L124 PetriNetUnfolderBase]: 4276/6667 cut-off events. [2024-06-14 12:52:34,730 INFO L125 PetriNetUnfolderBase]: For 1006361/1006365 co-relation queries the response was YES. [2024-06-14 12:52:34,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76006 conditions, 6667 events. 4276/6667 cut-off events. For 1006361/1006365 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40351 event pairs, 793 based on Foata normal form. 6/6673 useless extension candidates. Maximal degree in co-relation 75814. Up to 6277 conditions per place. [2024-06-14 12:52:34,853 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 55 changer transitions 0/606 dead transitions. [2024-06-14 12:52:34,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 606 transitions, 11939 flow [2024-06-14 12:52:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:52:34,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 12:52:34,854 INFO L175 Difference]: Start difference. First operand has 417 places, 584 transitions, 10254 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:52:34,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 606 transitions, 11939 flow [2024-06-14 12:52:39,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 606 transitions, 11709 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:39,967 INFO L231 Difference]: Finished difference. Result has 419 places, 587 transitions, 10296 flow [2024-06-14 12:52:39,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10024, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10296, PETRI_PLACES=419, PETRI_TRANSITIONS=587} [2024-06-14 12:52:39,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 12:52:39,968 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 587 transitions, 10296 flow [2024-06-14 12:52:39,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:39,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:39,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:39,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:52:39,968 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:39,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 99433282, now seen corresponding path program 13 times [2024-06-14 12:52:39,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:39,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798496004] [2024-06-14 12:52:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:40,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798496004] [2024-06-14 12:52:40,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798496004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:40,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:40,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:40,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504326342] [2024-06-14 12:52:40,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:40,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:40,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:40,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:40,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 587 transitions, 10296 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:40,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:40,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:40,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:42,687 INFO L124 PetriNetUnfolderBase]: 4296/6695 cut-off events. [2024-06-14 12:52:42,687 INFO L125 PetriNetUnfolderBase]: For 1033723/1033727 co-relation queries the response was YES. [2024-06-14 12:52:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76465 conditions, 6695 events. 4296/6695 cut-off events. For 1033723/1033727 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 40561 event pairs, 808 based on Foata normal form. 8/6703 useless extension candidates. Maximal degree in co-relation 76272. Up to 6368 conditions per place. [2024-06-14 12:52:42,799 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 566 selfloop transitions, 40 changer transitions 0/610 dead transitions. [2024-06-14 12:52:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 610 transitions, 11828 flow [2024-06-14 12:52:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:52:42,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 12:52:42,800 INFO L175 Difference]: Start difference. First operand has 419 places, 587 transitions, 10296 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:52:42,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 610 transitions, 11828 flow [2024-06-14 12:52:47,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 610 transitions, 11418 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:47,844 INFO L231 Difference]: Finished difference. Result has 420 places, 591 transitions, 10166 flow [2024-06-14 12:52:47,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9886, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10166, PETRI_PLACES=420, PETRI_TRANSITIONS=591} [2024-06-14 12:52:47,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 12:52:47,844 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 591 transitions, 10166 flow [2024-06-14 12:52:47,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:47,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:47,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:47,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:52:47,844 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:47,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:47,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1277265692, now seen corresponding path program 14 times [2024-06-14 12:52:47,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:47,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729374311] [2024-06-14 12:52:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729374311] [2024-06-14 12:52:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729374311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:48,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:48,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274036923] [2024-06-14 12:52:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:48,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:48,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:48,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:48,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 591 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:48,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:48,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:48,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:50,837 INFO L124 PetriNetUnfolderBase]: 4320/6721 cut-off events. [2024-06-14 12:52:50,837 INFO L125 PetriNetUnfolderBase]: For 1056684/1056688 co-relation queries the response was YES. [2024-06-14 12:52:50,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76448 conditions, 6721 events. 4320/6721 cut-off events. For 1056684/1056688 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40667 event pairs, 821 based on Foata normal form. 12/6733 useless extension candidates. Maximal degree in co-relation 76255. Up to 6422 conditions per place. [2024-06-14 12:52:50,943 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 578 selfloop transitions, 30 changer transitions 0/612 dead transitions. [2024-06-14 12:52:50,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 612 transitions, 11690 flow [2024-06-14 12:52:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:52:50,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:52:50,944 INFO L175 Difference]: Start difference. First operand has 420 places, 591 transitions, 10166 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:52:50,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 612 transitions, 11690 flow [2024-06-14 12:52:55,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 612 transitions, 11451 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:55,517 INFO L231 Difference]: Finished difference. Result has 422 places, 595 transitions, 10196 flow [2024-06-14 12:52:55,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10196, PETRI_PLACES=422, PETRI_TRANSITIONS=595} [2024-06-14 12:52:55,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-14 12:52:55,518 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 595 transitions, 10196 flow [2024-06-14 12:52:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:52:55,518 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:55,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1164426006, now seen corresponding path program 14 times [2024-06-14 12:52:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898246738] [2024-06-14 12:52:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:56,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:56,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898246738] [2024-06-14 12:52:56,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898246738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:56,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:56,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:56,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691573267] [2024-06-14 12:52:56,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:56,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:56,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:56,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:52:56,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 595 transitions, 10196 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:56,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:56,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:52:56,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:58,378 INFO L124 PetriNetUnfolderBase]: 4356/6779 cut-off events. [2024-06-14 12:52:58,379 INFO L125 PetriNetUnfolderBase]: For 1091780/1091784 co-relation queries the response was YES. [2024-06-14 12:52:58,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 6779 events. 4356/6779 cut-off events. For 1091780/1091784 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 41042 event pairs, 813 based on Foata normal form. 14/6793 useless extension candidates. Maximal degree in co-relation 77168. Up to 6364 conditions per place. [2024-06-14 12:52:58,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 562 selfloop transitions, 53 changer transitions 0/619 dead transitions. [2024-06-14 12:52:58,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 619 transitions, 11918 flow [2024-06-14 12:52:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:52:58,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:52:58,489 INFO L175 Difference]: Start difference. First operand has 422 places, 595 transitions, 10196 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:52:58,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 619 transitions, 11918 flow [2024-06-14 12:53:03,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 619 transitions, 11721 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:03,761 INFO L231 Difference]: Finished difference. Result has 423 places, 596 transitions, 10177 flow [2024-06-14 12:53:03,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9999, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10177, PETRI_PLACES=423, PETRI_TRANSITIONS=596} [2024-06-14 12:53:03,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 12:53:03,762 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 596 transitions, 10177 flow [2024-06-14 12:53:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:03,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:03,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:03,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:53:03,762 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:03,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1262680340, now seen corresponding path program 3 times [2024-06-14 12:53:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:03,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581630323] [2024-06-14 12:53:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:04,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581630323] [2024-06-14 12:53:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581630323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699429460] [2024-06-14 12:53:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:04,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:04,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 596 transitions, 10177 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:04,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:04,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:06,661 INFO L124 PetriNetUnfolderBase]: 4358/6776 cut-off events. [2024-06-14 12:53:06,661 INFO L125 PetriNetUnfolderBase]: For 1045506/1045510 co-relation queries the response was YES. [2024-06-14 12:53:06,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76934 conditions, 6776 events. 4358/6776 cut-off events. For 1045506/1045510 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 41073 event pairs, 795 based on Foata normal form. 5/6781 useless extension candidates. Maximal degree in co-relation 76739. Up to 6373 conditions per place. [2024-06-14 12:53:06,780 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 85 changer transitions 0/618 dead transitions. [2024-06-14 12:53:06,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 11769 flow [2024-06-14 12:53:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:53:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:53:06,781 INFO L175 Difference]: Start difference. First operand has 423 places, 596 transitions, 10177 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:53:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 11769 flow [2024-06-14 12:53:11,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 11635 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:11,935 INFO L231 Difference]: Finished difference. Result has 426 places, 602 transitions, 10491 flow [2024-06-14 12:53:11,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10491, PETRI_PLACES=426, PETRI_TRANSITIONS=602} [2024-06-14 12:53:11,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-14 12:53:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 602 transitions, 10491 flow [2024-06-14 12:53:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:53:11,935 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:11,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1600478459, now seen corresponding path program 18 times [2024-06-14 12:53:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805175925] [2024-06-14 12:53:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:13,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805175925] [2024-06-14 12:53:13,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805175925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:13,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:13,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:13,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192835149] [2024-06-14 12:53:13,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:13,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:13,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:13,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 602 transitions, 10491 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:13,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:13,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:13,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:14,972 INFO L124 PetriNetUnfolderBase]: 4368/6800 cut-off events. [2024-06-14 12:53:14,972 INFO L125 PetriNetUnfolderBase]: For 1064844/1064848 co-relation queries the response was YES. [2024-06-14 12:53:15,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77519 conditions, 6800 events. 4368/6800 cut-off events. For 1064844/1064848 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 41231 event pairs, 837 based on Foata normal form. 6/6806 useless extension candidates. Maximal degree in co-relation 77322. Up to 6519 conditions per place. [2024-06-14 12:53:15,100 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 29 changer transitions 0/621 dead transitions. [2024-06-14 12:53:15,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 621 transitions, 11947 flow [2024-06-14 12:53:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:53:15,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:53:15,101 INFO L175 Difference]: Start difference. First operand has 426 places, 602 transitions, 10491 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:53:15,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 621 transitions, 11947 flow [2024-06-14 12:53:20,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 621 transitions, 11667 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:20,490 INFO L231 Difference]: Finished difference. Result has 429 places, 605 transitions, 10413 flow [2024-06-14 12:53:20,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10211, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10413, PETRI_PLACES=429, PETRI_TRANSITIONS=605} [2024-06-14 12:53:20,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 12:53:20,490 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 605 transitions, 10413 flow [2024-06-14 12:53:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:20,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:20,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:53:20,490 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:20,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -524693756, now seen corresponding path program 15 times [2024-06-14 12:53:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650998503] [2024-06-14 12:53:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:20,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650998503] [2024-06-14 12:53:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650998503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:21,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:21,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389997196] [2024-06-14 12:53:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:21,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:21,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 605 transitions, 10413 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:21,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:21,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:21,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:23,468 INFO L124 PetriNetUnfolderBase]: 4383/6827 cut-off events. [2024-06-14 12:53:23,468 INFO L125 PetriNetUnfolderBase]: For 1087858/1087862 co-relation queries the response was YES. [2024-06-14 12:53:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77468 conditions, 6827 events. 4383/6827 cut-off events. For 1087858/1087862 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 41409 event pairs, 802 based on Foata normal form. 12/6839 useless extension candidates. Maximal degree in co-relation 77271. Up to 6142 conditions per place. [2024-06-14 12:53:23,580 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 565 selfloop transitions, 61 changer transitions 0/630 dead transitions. [2024-06-14 12:53:23,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 630 transitions, 12207 flow [2024-06-14 12:53:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:53:23,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:53:23,581 INFO L175 Difference]: Start difference. First operand has 429 places, 605 transitions, 10413 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:53:23,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 630 transitions, 12207 flow [2024-06-14 12:53:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 630 transitions, 12033 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:28,896 INFO L231 Difference]: Finished difference. Result has 430 places, 606 transitions, 10433 flow [2024-06-14 12:53:28,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10239, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10433, PETRI_PLACES=430, PETRI_TRANSITIONS=606} [2024-06-14 12:53:28,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-14 12:53:28,896 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 606 transitions, 10433 flow [2024-06-14 12:53:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:28,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:53:28,897 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:28,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1490760236, now seen corresponding path program 15 times [2024-06-14 12:53:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221573764] [2024-06-14 12:53:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:29,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221573764] [2024-06-14 12:53:29,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221573764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:29,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:29,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:29,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488329569] [2024-06-14 12:53:29,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:29,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:29,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:29,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:29,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 606 transitions, 10433 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:29,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:29,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:29,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:31,831 INFO L124 PetriNetUnfolderBase]: 4409/6861 cut-off events. [2024-06-14 12:53:31,831 INFO L125 PetriNetUnfolderBase]: For 1092639/1092639 co-relation queries the response was YES. [2024-06-14 12:53:31,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78580 conditions, 6861 events. 4409/6861 cut-off events. For 1092639/1092639 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41695 event pairs, 798 based on Foata normal form. 2/6862 useless extension candidates. Maximal degree in co-relation 78382. Up to 6357 conditions per place. [2024-06-14 12:53:31,950 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 546 selfloop transitions, 86 changer transitions 0/636 dead transitions. [2024-06-14 12:53:31,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 636 transitions, 12499 flow [2024-06-14 12:53:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:53:31,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:53:31,951 INFO L175 Difference]: Start difference. First operand has 430 places, 606 transitions, 10433 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:53:31,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 636 transitions, 12499 flow [2024-06-14 12:53:37,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 636 transitions, 12333 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:37,739 INFO L231 Difference]: Finished difference. Result has 433 places, 617 transitions, 10953 flow [2024-06-14 12:53:37,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10269, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10953, PETRI_PLACES=433, PETRI_TRANSITIONS=617} [2024-06-14 12:53:37,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 12:53:37,740 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 617 transitions, 10953 flow [2024-06-14 12:53:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:37,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:37,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:53:37,740 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:37,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1491027146, now seen corresponding path program 16 times [2024-06-14 12:53:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287024261] [2024-06-14 12:53:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287024261] [2024-06-14 12:53:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287024261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:38,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440837697] [2024-06-14 12:53:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:38,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:38,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 617 transitions, 10953 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:38,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:38,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:38,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:40,558 INFO L124 PetriNetUnfolderBase]: 4429/6889 cut-off events. [2024-06-14 12:53:40,558 INFO L125 PetriNetUnfolderBase]: For 1110397/1110401 co-relation queries the response was YES. [2024-06-14 12:53:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79310 conditions, 6889 events. 4429/6889 cut-off events. For 1110397/1110401 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41779 event pairs, 800 based on Foata normal form. 8/6897 useless extension candidates. Maximal degree in co-relation 79111. Up to 6383 conditions per place. [2024-06-14 12:53:40,679 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 77 changer transitions 0/645 dead transitions. [2024-06-14 12:53:40,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 645 transitions, 13134 flow [2024-06-14 12:53:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:53:40,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 12:53:40,680 INFO L175 Difference]: Start difference. First operand has 433 places, 617 transitions, 10953 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:53:40,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 645 transitions, 13134 flow [2024-06-14 12:53:46,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 645 transitions, 12856 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:46,869 INFO L231 Difference]: Finished difference. Result has 438 places, 623 transitions, 11139 flow [2024-06-14 12:53:46,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10691, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11139, PETRI_PLACES=438, PETRI_TRANSITIONS=623} [2024-06-14 12:53:46,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 12:53:46,869 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 623 transitions, 11139 flow [2024-06-14 12:53:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:46,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:53:46,869 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:46,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1498379013, now seen corresponding path program 19 times [2024-06-14 12:53:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869477055] [2024-06-14 12:53:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:47,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:47,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869477055] [2024-06-14 12:53:47,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869477055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:47,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:47,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:47,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394221553] [2024-06-14 12:53:47,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:47,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:47,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:47,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:47,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:48,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:48,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 623 transitions, 11139 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:48,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:48,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:48,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:50,204 INFO L124 PetriNetUnfolderBase]: 4423/6883 cut-off events. [2024-06-14 12:53:50,204 INFO L125 PetriNetUnfolderBase]: For 1100497/1100497 co-relation queries the response was YES. [2024-06-14 12:53:50,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78983 conditions, 6883 events. 4423/6883 cut-off events. For 1100497/1100497 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41823 event pairs, 835 based on Foata normal form. 2/6884 useless extension candidates. Maximal degree in co-relation 78782. Up to 6523 conditions per place. [2024-06-14 12:53:50,316 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 50 changer transitions 0/642 dead transitions. [2024-06-14 12:53:50,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 642 transitions, 12550 flow [2024-06-14 12:53:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:53:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:53:50,317 INFO L175 Difference]: Start difference. First operand has 438 places, 623 transitions, 11139 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:53:50,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 642 transitions, 12550 flow [2024-06-14 12:53:56,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 642 transitions, 11737 flow, removed 158 selfloop flow, removed 9 redundant places. [2024-06-14 12:53:56,189 INFO L231 Difference]: Finished difference. Result has 438 places, 623 transitions, 10432 flow [2024-06-14 12:53:56,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10326, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10432, PETRI_PLACES=438, PETRI_TRANSITIONS=623} [2024-06-14 12:53:56,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 12:53:56,190 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 623 transitions, 10432 flow [2024-06-14 12:53:56,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:56,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:56,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:53:56,190 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:56,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1901221374, now seen corresponding path program 1 times [2024-06-14 12:53:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:56,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009158143] [2024-06-14 12:53:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:57,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:57,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009158143] [2024-06-14 12:53:57,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009158143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:57,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:57,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:53:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150199513] [2024-06-14 12:53:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:53:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:57,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:53:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:53:57,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:53:57,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 623 transitions, 10432 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:57,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:57,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:53:57,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:59,881 INFO L124 PetriNetUnfolderBase]: 5017/7808 cut-off events. [2024-06-14 12:53:59,881 INFO L125 PetriNetUnfolderBase]: For 1896396/1896400 co-relation queries the response was YES. [2024-06-14 12:53:59,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95921 conditions, 7808 events. 5017/7808 cut-off events. For 1896396/1896400 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47850 event pairs, 985 based on Foata normal form. 60/7868 useless extension candidates. Maximal degree in co-relation 95721. Up to 6118 conditions per place. [2024-06-14 12:54:00,034 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 571 selfloop transitions, 99 changer transitions 9/683 dead transitions. [2024-06-14 12:54:00,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 683 transitions, 12882 flow [2024-06-14 12:54:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:54:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:54:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:54:00,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:54:00,035 INFO L175 Difference]: Start difference. First operand has 438 places, 623 transitions, 10432 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:54:00,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 683 transitions, 12882 flow [2024-06-14 12:54:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 683 transitions, 12706 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:07,706 INFO L231 Difference]: Finished difference. Result has 443 places, 629 transitions, 10714 flow [2024-06-14 12:54:07,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10256, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10714, PETRI_PLACES=443, PETRI_TRANSITIONS=629} [2024-06-14 12:54:07,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 12:54:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 629 transitions, 10714 flow [2024-06-14 12:54:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:07,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:07,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:54:07,707 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:07,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1901160924, now seen corresponding path program 2 times [2024-06-14 12:54:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610579648] [2024-06-14 12:54:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610579648] [2024-06-14 12:54:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610579648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:09,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:54:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876208138] [2024-06-14 12:54:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:54:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:54:09,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:54:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:09,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 629 transitions, 10714 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:09,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:09,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:09,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:11,862 INFO L124 PetriNetUnfolderBase]: 5082/7917 cut-off events. [2024-06-14 12:54:11,863 INFO L125 PetriNetUnfolderBase]: For 1928068/1928072 co-relation queries the response was YES. [2024-06-14 12:54:11,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98890 conditions, 7917 events. 5082/7917 cut-off events. For 1928068/1928072 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 48572 event pairs, 1178 based on Foata normal form. 58/7975 useless extension candidates. Maximal degree in co-relation 98687. Up to 7023 conditions per place. [2024-06-14 12:54:12,009 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 564 selfloop transitions, 107 changer transitions 3/678 dead transitions. [2024-06-14 12:54:12,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 678 transitions, 12650 flow [2024-06-14 12:54:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:54:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:54:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 12:54:12,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:54:12,010 INFO L175 Difference]: Start difference. First operand has 443 places, 629 transitions, 10714 flow. Second operand 11 states and 198 transitions. [2024-06-14 12:54:12,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 678 transitions, 12650 flow [2024-06-14 12:54:19,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 678 transitions, 12403 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:54:19,224 INFO L231 Difference]: Finished difference. Result has 448 places, 641 transitions, 10995 flow [2024-06-14 12:54:19,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10507, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10995, PETRI_PLACES=448, PETRI_TRANSITIONS=641} [2024-06-14 12:54:19,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 12:54:19,225 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 641 transitions, 10995 flow [2024-06-14 12:54:19,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:19,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:19,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:19,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:54:19,226 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:19,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:19,226 INFO L85 PathProgramCache]: Analyzing trace with hash -709395022, now seen corresponding path program 1 times [2024-06-14 12:54:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487153530] [2024-06-14 12:54:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487153530] [2024-06-14 12:54:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487153530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389918574] [2024-06-14 12:54:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:20,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:20,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 641 transitions, 10995 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:20,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:20,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:20,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:23,459 INFO L124 PetriNetUnfolderBase]: 4950/7727 cut-off events. [2024-06-14 12:54:23,459 INFO L125 PetriNetUnfolderBase]: For 1683497/1683501 co-relation queries the response was YES. [2024-06-14 12:54:23,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89162 conditions, 7727 events. 4950/7727 cut-off events. For 1683497/1683501 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 47495 event pairs, 1044 based on Foata normal form. 82/7809 useless extension candidates. Maximal degree in co-relation 88958. Up to 6442 conditions per place. [2024-06-14 12:54:23,585 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 105 changer transitions 5/673 dead transitions. [2024-06-14 12:54:23,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 673 transitions, 12730 flow [2024-06-14 12:54:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:54:23,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:54:23,586 INFO L175 Difference]: Start difference. First operand has 448 places, 641 transitions, 10995 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:54:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 673 transitions, 12730 flow [2024-06-14 12:54:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 673 transitions, 12452 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:30,201 INFO L231 Difference]: Finished difference. Result has 449 places, 640 transitions, 11028 flow [2024-06-14 12:54:30,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10737, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11028, PETRI_PLACES=449, PETRI_TRANSITIONS=640} [2024-06-14 12:54:30,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 12:54:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 640 transitions, 11028 flow [2024-06-14 12:54:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:30,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:30,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:30,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:54:30,203 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:30,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1782895304, now seen corresponding path program 2 times [2024-06-14 12:54:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990724710] [2024-06-14 12:54:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:31,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:31,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990724710] [2024-06-14 12:54:31,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990724710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:31,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:31,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:31,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823009563] [2024-06-14 12:54:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:31,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:31,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:31,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:31,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 640 transitions, 11028 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:31,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:31,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:31,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:34,048 INFO L124 PetriNetUnfolderBase]: 4914/7685 cut-off events. [2024-06-14 12:54:34,048 INFO L125 PetriNetUnfolderBase]: For 1238484/1238484 co-relation queries the response was YES. [2024-06-14 12:54:34,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88309 conditions, 7685 events. 4914/7685 cut-off events. For 1238484/1238484 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 47463 event pairs, 1019 based on Foata normal form. 2/7687 useless extension candidates. Maximal degree in co-relation 88104. Up to 7369 conditions per place. [2024-06-14 12:54:34,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 41 changer transitions 0/670 dead transitions. [2024-06-14 12:54:34,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 670 transitions, 12586 flow [2024-06-14 12:54:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:54:34,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:54:34,173 INFO L175 Difference]: Start difference. First operand has 449 places, 640 transitions, 11028 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:54:34,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 670 transitions, 12586 flow [2024-06-14 12:54:39,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 670 transitions, 12339 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:54:39,329 INFO L231 Difference]: Finished difference. Result has 453 places, 647 transitions, 11030 flow [2024-06-14 12:54:39,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10781, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11030, PETRI_PLACES=453, PETRI_TRANSITIONS=647} [2024-06-14 12:54:39,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-14 12:54:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 647 transitions, 11030 flow [2024-06-14 12:54:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:39,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:39,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:54:39,330 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1783073244, now seen corresponding path program 3 times [2024-06-14 12:54:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645426593] [2024-06-14 12:54:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:40,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645426593] [2024-06-14 12:54:40,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645426593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:40,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:40,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:54:40,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696495494] [2024-06-14 12:54:40,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:40,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:54:40,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:54:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:54:40,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:40,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 647 transitions, 11030 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:40,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:40,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:40,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:43,164 INFO L124 PetriNetUnfolderBase]: 4950/7741 cut-off events. [2024-06-14 12:54:43,164 INFO L125 PetriNetUnfolderBase]: For 1285424/1285424 co-relation queries the response was YES. [2024-06-14 12:54:43,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88646 conditions, 7741 events. 4950/7741 cut-off events. For 1285424/1285424 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 47858 event pairs, 1023 based on Foata normal form. 10/7751 useless extension candidates. Maximal degree in co-relation 88437. Up to 7332 conditions per place. [2024-06-14 12:54:43,413 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 617 selfloop transitions, 54 changer transitions 0/675 dead transitions. [2024-06-14 12:54:43,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 675 transitions, 12632 flow [2024-06-14 12:54:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:54:43,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:54:43,414 INFO L175 Difference]: Start difference. First operand has 453 places, 647 transitions, 11030 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:54:43,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 675 transitions, 12632 flow [2024-06-14 12:54:49,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 675 transitions, 12517 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:54:49,040 INFO L231 Difference]: Finished difference. Result has 458 places, 648 transitions, 11074 flow [2024-06-14 12:54:49,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10915, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11074, PETRI_PLACES=458, PETRI_TRANSITIONS=648} [2024-06-14 12:54:49,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 12:54:49,040 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 648 transitions, 11074 flow [2024-06-14 12:54:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:49,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:54:49,041 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1782888794, now seen corresponding path program 3 times [2024-06-14 12:54:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902353871] [2024-06-14 12:54:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:49,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:50,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902353871] [2024-06-14 12:54:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902353871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:50,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830441192] [2024-06-14 12:54:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:50,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:50,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:50,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 648 transitions, 11074 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:50,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:50,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:50,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:52,798 INFO L124 PetriNetUnfolderBase]: 4978/7783 cut-off events. [2024-06-14 12:54:52,798 INFO L125 PetriNetUnfolderBase]: For 1292146/1292146 co-relation queries the response was YES. [2024-06-14 12:54:52,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89299 conditions, 7783 events. 4978/7783 cut-off events. For 1292146/1292146 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 48159 event pairs, 1018 based on Foata normal form. 8/7791 useless extension candidates. Maximal degree in co-relation 89089. Up to 7244 conditions per place. [2024-06-14 12:54:53,031 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 618 selfloop transitions, 58 changer transitions 0/680 dead transitions. [2024-06-14 12:54:53,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 680 transitions, 12758 flow [2024-06-14 12:54:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:54:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:54:53,033 INFO L175 Difference]: Start difference. First operand has 458 places, 648 transitions, 11074 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:54:53,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 680 transitions, 12758 flow [2024-06-14 12:54:58,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 680 transitions, 12631 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:54:58,596 INFO L231 Difference]: Finished difference. Result has 460 places, 649 transitions, 11113 flow [2024-06-14 12:54:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10947, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11113, PETRI_PLACES=460, PETRI_TRANSITIONS=649} [2024-06-14 12:54:58,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-14 12:54:58,597 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 649 transitions, 11113 flow [2024-06-14 12:54:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:58,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:58,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:54:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:54:58,597 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:54:58,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1611000060, now seen corresponding path program 4 times [2024-06-14 12:54:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246298233] [2024-06-14 12:54:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246298233] [2024-06-14 12:54:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246298233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:54:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161870836] [2024-06-14 12:54:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:54:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:54:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:54:59,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:54:59,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 649 transitions, 11113 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:54:59,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:59,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:54:59,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:02,311 INFO L124 PetriNetUnfolderBase]: 4986/7795 cut-off events. [2024-06-14 12:55:02,311 INFO L125 PetriNetUnfolderBase]: For 1270422/1270422 co-relation queries the response was YES. [2024-06-14 12:55:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89477 conditions, 7795 events. 4986/7795 cut-off events. For 1270422/1270422 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 48335 event pairs, 1054 based on Foata normal form. 2/7797 useless extension candidates. Maximal degree in co-relation 89266. Up to 7535 conditions per place. [2024-06-14 12:55:02,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 643 selfloop transitions, 24 changer transitions 0/671 dead transitions. [2024-06-14 12:55:02,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 671 transitions, 12617 flow [2024-06-14 12:55:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:55:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:55:02,433 INFO L175 Difference]: Start difference. First operand has 460 places, 649 transitions, 11113 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:55:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 671 transitions, 12617 flow [2024-06-14 12:55:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 671 transitions, 12484 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:06,771 INFO L231 Difference]: Finished difference. Result has 463 places, 651 transitions, 11111 flow [2024-06-14 12:55:06,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10980, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11111, PETRI_PLACES=463, PETRI_TRANSITIONS=651} [2024-06-14 12:55:06,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 12:55:06,772 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 651 transitions, 11111 flow [2024-06-14 12:55:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:06,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:06,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:55:06,772 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:06,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1610993550, now seen corresponding path program 5 times [2024-06-14 12:55:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444860011] [2024-06-14 12:55:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444860011] [2024-06-14 12:55:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444860011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:07,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456931130] [2024-06-14 12:55:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:07,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:08,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:08,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 651 transitions, 11111 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:08,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:08,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:08,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:10,754 INFO L124 PetriNetUnfolderBase]: 4994/7809 cut-off events. [2024-06-14 12:55:10,754 INFO L125 PetriNetUnfolderBase]: For 1284788/1284788 co-relation queries the response was YES. [2024-06-14 12:55:10,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89524 conditions, 7809 events. 4994/7809 cut-off events. For 1284788/1284788 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 48421 event pairs, 1054 based on Foata normal form. 2/7811 useless extension candidates. Maximal degree in co-relation 89312. Up to 7533 conditions per place. [2024-06-14 12:55:10,885 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 27 changer transitions 0/673 dead transitions. [2024-06-14 12:55:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 673 transitions, 12613 flow [2024-06-14 12:55:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:55:10,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 12:55:10,885 INFO L175 Difference]: Start difference. First operand has 463 places, 651 transitions, 11111 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:55:10,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 673 transitions, 12613 flow [2024-06-14 12:55:16,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 673 transitions, 12506 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:16,155 INFO L231 Difference]: Finished difference. Result has 467 places, 653 transitions, 11145 flow [2024-06-14 12:55:16,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11004, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11145, PETRI_PLACES=467, PETRI_TRANSITIONS=653} [2024-06-14 12:55:16,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 12:55:16,155 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 653 transitions, 11145 flow [2024-06-14 12:55:16,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:16,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:16,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:55:16,155 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:16,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1610762910, now seen corresponding path program 6 times [2024-06-14 12:55:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554226150] [2024-06-14 12:55:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:17,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:17,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554226150] [2024-06-14 12:55:17,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554226150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:17,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:17,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489770083] [2024-06-14 12:55:17,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:17,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 653 transitions, 11145 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:19,918 INFO L124 PetriNetUnfolderBase]: 5002/7819 cut-off events. [2024-06-14 12:55:19,918 INFO L125 PetriNetUnfolderBase]: For 1301603/1301603 co-relation queries the response was YES. [2024-06-14 12:55:20,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89879 conditions, 7819 events. 5002/7819 cut-off events. For 1301603/1301603 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 48509 event pairs, 1050 based on Foata normal form. 2/7821 useless extension candidates. Maximal degree in co-relation 89666. Up to 7559 conditions per place. [2024-06-14 12:55:20,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 649 selfloop transitions, 22 changer transitions 0/675 dead transitions. [2024-06-14 12:55:20,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 675 transitions, 12645 flow [2024-06-14 12:55:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:55:20,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:55:20,049 INFO L175 Difference]: Start difference. First operand has 467 places, 653 transitions, 11145 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:55:20,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 675 transitions, 12645 flow [2024-06-14 12:55:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 675 transitions, 12520 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 12:55:25,809 INFO L231 Difference]: Finished difference. Result has 469 places, 655 transitions, 11155 flow [2024-06-14 12:55:25,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11020, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11155, PETRI_PLACES=469, PETRI_TRANSITIONS=655} [2024-06-14 12:55:25,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 12:55:25,809 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 655 transitions, 11155 flow [2024-06-14 12:55:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:25,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:25,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:25,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:55:25,809 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:25,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1617434110, now seen corresponding path program 4 times [2024-06-14 12:55:25,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:25,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194290712] [2024-06-14 12:55:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194290712] [2024-06-14 12:55:27,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194290712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:27,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:27,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:55:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274468552] [2024-06-14 12:55:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:55:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:55:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:55:27,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:27,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 655 transitions, 11155 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:27,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:27,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:27,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:29,788 INFO L124 PetriNetUnfolderBase]: 5038/7875 cut-off events. [2024-06-14 12:55:29,789 INFO L125 PetriNetUnfolderBase]: For 1378695/1378695 co-relation queries the response was YES. [2024-06-14 12:55:29,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90832 conditions, 7875 events. 5038/7875 cut-off events. For 1378695/1378695 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 48829 event pairs, 1062 based on Foata normal form. 10/7885 useless extension candidates. Maximal degree in co-relation 90618. Up to 7571 conditions per place. [2024-06-14 12:55:29,914 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 26 changer transitions 0/682 dead transitions. [2024-06-14 12:55:29,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 682 transitions, 12783 flow [2024-06-14 12:55:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:55:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:55:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:55:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:55:29,915 INFO L175 Difference]: Start difference. First operand has 469 places, 655 transitions, 11155 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:55:29,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 682 transitions, 12783 flow [2024-06-14 12:55:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 682 transitions, 12664 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:55:36,684 INFO L231 Difference]: Finished difference. Result has 472 places, 656 transitions, 11147 flow [2024-06-14 12:55:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11036, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11147, PETRI_PLACES=472, PETRI_TRANSITIONS=656} [2024-06-14 12:55:36,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-14 12:55:36,684 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 656 transitions, 11147 flow [2024-06-14 12:55:36,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:36,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:55:36,685 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:36,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:36,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1760987418, now seen corresponding path program 7 times [2024-06-14 12:55:36,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:36,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363462047] [2024-06-14 12:55:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:37,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:37,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363462047] [2024-06-14 12:55:37,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363462047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:37,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:37,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:55:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965067401] [2024-06-14 12:55:37,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:55:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:55:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:55:37,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:37,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 656 transitions, 11147 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:37,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:37,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:37,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:40,541 INFO L124 PetriNetUnfolderBase]: 5069/7924 cut-off events. [2024-06-14 12:55:40,542 INFO L125 PetriNetUnfolderBase]: For 1403707/1403707 co-relation queries the response was YES. [2024-06-14 12:55:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91454 conditions, 7924 events. 5069/7924 cut-off events. For 1403707/1403707 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49239 event pairs, 1138 based on Foata normal form. 12/7936 useless extension candidates. Maximal degree in co-relation 91239. Up to 7625 conditions per place. [2024-06-14 12:55:40,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 654 selfloop transitions, 20 changer transitions 0/678 dead transitions. [2024-06-14 12:55:40,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 678 transitions, 12765 flow [2024-06-14 12:55:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:55:40,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 12:55:40,683 INFO L175 Difference]: Start difference. First operand has 472 places, 656 transitions, 11147 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:55:40,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 678 transitions, 12765 flow [2024-06-14 12:55:47,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 678 transitions, 12674 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:55:47,019 INFO L231 Difference]: Finished difference. Result has 473 places, 657 transitions, 11158 flow [2024-06-14 12:55:47,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11056, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11158, PETRI_PLACES=473, PETRI_TRANSITIONS=657} [2024-06-14 12:55:47,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-14 12:55:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 657 transitions, 11158 flow [2024-06-14 12:55:47,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:47,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:47,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:55:47,020 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:47,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 113502322, now seen corresponding path program 8 times [2024-06-14 12:55:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:47,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973642390] [2024-06-14 12:55:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:47,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:48,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:48,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973642390] [2024-06-14 12:55:48,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973642390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:48,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:48,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:55:48,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219364318] [2024-06-14 12:55:48,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:48,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:55:48,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:55:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:55:48,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:48,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 657 transitions, 11158 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:48,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:48,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:48,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:50,788 INFO L124 PetriNetUnfolderBase]: 5097/7970 cut-off events. [2024-06-14 12:55:50,789 INFO L125 PetriNetUnfolderBase]: For 1392445/1392445 co-relation queries the response was YES. [2024-06-14 12:55:50,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91882 conditions, 7970 events. 5097/7970 cut-off events. For 1392445/1392445 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 49673 event pairs, 1140 based on Foata normal form. 8/7978 useless extension candidates. Maximal degree in co-relation 91666. Up to 7631 conditions per place. [2024-06-14 12:55:50,920 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 656 selfloop transitions, 22 changer transitions 0/682 dead transitions. [2024-06-14 12:55:50,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 682 transitions, 12834 flow [2024-06-14 12:55:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:55:50,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 12:55:50,921 INFO L175 Difference]: Start difference. First operand has 473 places, 657 transitions, 11158 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:55:50,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 682 transitions, 12834 flow [2024-06-14 12:55:56,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 682 transitions, 12776 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:56,649 INFO L231 Difference]: Finished difference. Result has 477 places, 658 transitions, 11206 flow [2024-06-14 12:55:56,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11100, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11206, PETRI_PLACES=477, PETRI_TRANSITIONS=658} [2024-06-14 12:55:56,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 12:55:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 658 transitions, 11206 flow [2024-06-14 12:55:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:56,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:55:56,650 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:56,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash 113732962, now seen corresponding path program 9 times [2024-06-14 12:55:56,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:56,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670612065] [2024-06-14 12:55:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:57,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:57,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670612065] [2024-06-14 12:55:57,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670612065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:57,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:55:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550579516] [2024-06-14 12:55:57,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:57,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:55:57,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:55:57,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:55:57,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:57,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 658 transitions, 11206 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:57,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:57,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:00,508 INFO L124 PetriNetUnfolderBase]: 5125/8014 cut-off events. [2024-06-14 12:56:00,509 INFO L125 PetriNetUnfolderBase]: For 1410264/1410264 co-relation queries the response was YES. [2024-06-14 12:56:00,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92368 conditions, 8014 events. 5125/8014 cut-off events. For 1410264/1410264 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 50005 event pairs, 1158 based on Foata normal form. 8/8022 useless extension candidates. Maximal degree in co-relation 92151. Up to 7743 conditions per place. [2024-06-14 12:56:00,652 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 658 selfloop transitions, 16 changer transitions 0/678 dead transitions. [2024-06-14 12:56:00,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 678 transitions, 12722 flow [2024-06-14 12:56:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:56:00,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:56:00,653 INFO L175 Difference]: Start difference. First operand has 477 places, 658 transitions, 11206 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:56:00,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 678 transitions, 12722 flow [2024-06-14 12:56:06,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 678 transitions, 12636 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:56:06,060 INFO L231 Difference]: Finished difference. Result has 478 places, 659 transitions, 11216 flow [2024-06-14 12:56:06,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11120, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11216, PETRI_PLACES=478, PETRI_TRANSITIONS=659} [2024-06-14 12:56:06,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-14 12:56:06,060 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 659 transitions, 11216 flow [2024-06-14 12:56:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:06,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:06,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:06,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:56:06,061 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:06,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -239585950, now seen corresponding path program 10 times [2024-06-14 12:56:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:06,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718045783] [2024-06-14 12:56:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718045783] [2024-06-14 12:56:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718045783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:07,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:07,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:56:07,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653108223] [2024-06-14 12:56:07,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:56:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:56:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:56:07,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:56:07,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 659 transitions, 11216 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:07,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:07,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:56:07,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:09,877 INFO L124 PetriNetUnfolderBase]: 5133/8024 cut-off events. [2024-06-14 12:56:09,877 INFO L125 PetriNetUnfolderBase]: For 1389123/1389123 co-relation queries the response was YES. [2024-06-14 12:56:09,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92388 conditions, 8024 events. 5133/8024 cut-off events. For 1389123/1389123 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 49996 event pairs, 1142 based on Foata normal form. 2/8026 useless extension candidates. Maximal degree in co-relation 92170. Up to 7774 conditions per place. [2024-06-14 12:56:10,012 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 655 selfloop transitions, 18 changer transitions 0/677 dead transitions. [2024-06-14 12:56:10,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 677 transitions, 12698 flow [2024-06-14 12:56:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 12:56:10,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 12:56:10,013 INFO L175 Difference]: Start difference. First operand has 478 places, 659 transitions, 11216 flow. Second operand 9 states and 139 transitions. [2024-06-14 12:56:10,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 677 transitions, 12698 flow