./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe035_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe035_power.i ./goblint.2024-05-07_14-17-48.files/protection/safe035_power.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:48:57,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:48:57,112 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:48:57,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:48:57,119 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:48:57,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:48:57,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:48:57,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:48:57,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:48:57,160 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:48:57,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:48:57,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:48:57,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:48:57,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:48:57,163 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:48:57,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:48:57,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:48:57,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:48:57,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:48:57,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:48:57,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:48:57,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:48:57,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:48:57,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:48:57,166 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:48:57,166 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:48:57,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:48:57,167 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:48:57,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:48:57,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:48:57,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:48:57,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:48:57,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:48:57,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:48:57,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:48:57,170 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:48:57,170 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:48:57,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:48:57,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:48:57,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:48:57,171 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:48:57,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:48:57,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:48:57,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:48:57,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:48:57,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:48:57,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:48:57,513 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:48:57,513 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:48:57,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-05-12 12:48:58,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:48:58,888 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:48:58,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-05-12 12:48:58,931 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1c9e8fe/12ce7830f72042b3a49fa0886be91fc5/FLAGa76be294c [2024-05-12 12:48:58,942 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1c9e8fe/12ce7830f72042b3a49fa0886be91fc5 [2024-05-12 12:48:58,943 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:48:58,944 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:48:58,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe035_power.yml/witness.yml [2024-05-12 12:48:59,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:48:59,097 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:48:59,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:48:59,098 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:48:59,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:48:59,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:48:58" (1/2) ... [2024-05-12 12:48:59,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111db40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:59, skipping insertion in model container [2024-05-12 12:48:59,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:48:58" (1/2) ... [2024-05-12 12:48:59,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69ed90df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:48:59, skipping insertion in model container [2024-05-12 12:48:59,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:48:59" (2/2) ... [2024-05-12 12:48:59,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@111db40 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59, skipping insertion in model container [2024-05-12 12:48:59,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:48:59" (2/2) ... [2024-05-12 12:48:59,114 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:48:59,221 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:48:59,223 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-05-12 12:48:59,223 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-05-12 12:48:59,224 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-05-12 12:48:59,224 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:48:59,224 INFO L106 edCorrectnessWitness]: ghost_update [L869-L869] multithreaded = 1; [2024-05-12 12:48:59,272 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:48:59,433 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i[947,960] [2024-05-12 12:48:59,654 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:48:59,662 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:48:59,700 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i[947,960] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:48:59,824 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:48:59,880 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:48:59,881 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59 WrapperNode [2024-05-12 12:48:59,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:48:59,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:48:59,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:48:59,883 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:48:59,890 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 12.05 12:48:59" (1/1) ... [2024-05-12 12:48:59,923 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 12.05 12:48:59" (1/1) ... [2024-05-12 12:48:59,966 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 178 [2024-05-12 12:48:59,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:48:59,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:48:59,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:48:59,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:48:59,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:48:59,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,001 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,035 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 12:49:00,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,050 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:49:00,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:49:00,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:49:00,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:49:00,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (1/1) ... [2024-05-12 12:49:00,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:49:00,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:49:00,178 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) [2024-05-12 12:49:00,249 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 [2024-05-12 12:49:00,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:49:00,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:49:00,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:49:00,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:49:00,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:49:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:49:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:49:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:49:00,266 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:49:00,266 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:49:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:49:00,267 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:49:00,267 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:49:00,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:49:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:49:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:49:00,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:49:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:49:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:49:00,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:49:00,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:49:00,270 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:49:00,419 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:49:00,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:49:00,787 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:49:00,787 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:49:01,002 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:49:01,003 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:49:01,003 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:49:01 BoogieIcfgContainer [2024-05-12 12:49:01,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:49:01,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:49:01,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:49:01,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:49:01,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:48:58" (1/4) ... [2024-05-12 12:49:01,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7019577a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:49:01, skipping insertion in model container [2024-05-12 12:49:01,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:48:59" (2/4) ... [2024-05-12 12:49:01,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7019577a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:49:01, skipping insertion in model container [2024-05-12 12:49:01,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:48:59" (3/4) ... [2024-05-12 12:49:01,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7019577a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:49:01, skipping insertion in model container [2024-05-12 12:49:01,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:49:01" (4/4) ... [2024-05-12 12:49:01,013 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2024-05-12 12:49:01,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:49:01,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 12:49:01,029 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:49:01,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:49:01,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 12:49:01,163 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 12:49:01,163 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:49:01,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-05-12 12:49:01,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 12:49:01,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 12:49:01,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:49:01,192 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;@22dd9bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:49:01,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 12:49:01,198 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:49:01,199 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:49:01,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:49:01,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:01,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:49:01,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:01,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash 747309880, now seen corresponding path program 1 times [2024-05-12 12:49:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906951835] [2024-05-12 12:49:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906951835] [2024-05-12 12:49:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906951835] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:49:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712889042] [2024-05-12 12:49:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:49:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:49:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:49:02,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 12:49:02,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 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) [2024-05-12 12:49:02,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:02,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 12:49:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:04,214 INFO L124 PetriNetUnfolderBase]: 6858/10760 cut-off events. [2024-05-12 12:49:04,214 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-05-12 12:49:04,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20601 conditions, 10760 events. 6858/10760 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70367 event pairs, 5845 based on Foata normal form. 337/10373 useless extension candidates. Maximal degree in co-relation 20586. Up to 9723 conditions per place. [2024-05-12 12:49:04,334 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 48 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-05-12 12:49:04,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 245 flow [2024-05-12 12:49:04,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:49:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:49:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-05-12 12:49:04,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-05-12 12:49:04,348 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 94 transitions. [2024-05-12 12:49:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 245 flow [2024-05-12 12:49:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 240 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:04,357 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 12:49:04,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 12:49:04,363 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 12:49:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 12:49:04,364 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) [2024-05-12 12:49:04,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:04,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:49:04,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash 905302615, now seen corresponding path program 1 times [2024-05-12 12:49:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:04,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719862989] [2024-05-12 12:49:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:05,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:05,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719862989] [2024-05-12 12:49:05,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719862989] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:05,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:05,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:49:05,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229818111] [2024-05-12 12:49:05,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:49:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:49:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:49:05,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 12:49:05,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:05,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:05,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 12:49:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:06,747 INFO L124 PetriNetUnfolderBase]: 6837/10730 cut-off events. [2024-05-12 12:49:06,748 INFO L125 PetriNetUnfolderBase]: For 1369/1369 co-relation queries the response was YES. [2024-05-12 12:49:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22491 conditions, 10730 events. 6837/10730 cut-off events. For 1369/1369 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70724 event pairs, 3946 based on Foata normal form. 9/10066 useless extension candidates. Maximal degree in co-relation 22476. Up to 9639 conditions per place. [2024-05-12 12:49:06,813 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 60 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-05-12 12:49:06,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 363 flow [2024-05-12 12:49:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:49:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:49:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-05-12 12:49:06,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-05-12 12:49:06,819 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 118 transitions. [2024-05-12 12:49:06,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 363 flow [2024-05-12 12:49:06,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 354 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:06,823 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 222 flow [2024-05-12 12:49:06,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-05-12 12:49:06,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2024-05-12 12:49:06,829 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 222 flow [2024-05-12 12:49:06,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:06,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:06,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:06,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:49:06,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:06,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash 878981691, now seen corresponding path program 1 times [2024-05-12 12:49:06,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552781021] [2024-05-12 12:49:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552781021] [2024-05-12 12:49:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552781021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:07,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:07,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297503044] [2024-05-12 12:49:07,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:07,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:07,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:07,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:07,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:07,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:09,784 INFO L124 PetriNetUnfolderBase]: 9045/13957 cut-off events. [2024-05-12 12:49:09,784 INFO L125 PetriNetUnfolderBase]: For 4695/4695 co-relation queries the response was YES. [2024-05-12 12:49:09,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32059 conditions, 13957 events. 9045/13957 cut-off events. For 4695/4695 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 89643 event pairs, 5940 based on Foata normal form. 8/13138 useless extension candidates. Maximal degree in co-relation 32041. Up to 12677 conditions per place. [2024-05-12 12:49:09,867 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-05-12 12:49:09,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 462 flow [2024-05-12 12:49:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-05-12 12:49:09,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 12:49:09,872 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 222 flow. Second operand 5 states and 125 transitions. [2024-05-12 12:49:09,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 462 flow [2024-05-12 12:49:09,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 456 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-05-12 12:49:09,878 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 280 flow [2024-05-12 12:49:09,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-05-12 12:49:09,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 12:49:09,880 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 280 flow [2024-05-12 12:49:09,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:09,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:09,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:09,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:49:09,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:09,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash -900950891, now seen corresponding path program 1 times [2024-05-12 12:49:09,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:09,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409756400] [2024-05-12 12:49:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409756400] [2024-05-12 12:49:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409756400] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382039001] [2024-05-12 12:49:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:12,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:12,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:12,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:12,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:12,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:13,963 INFO L124 PetriNetUnfolderBase]: 7949/12436 cut-off events. [2024-05-12 12:49:13,963 INFO L125 PetriNetUnfolderBase]: For 7191/7191 co-relation queries the response was YES. [2024-05-12 12:49:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30572 conditions, 12436 events. 7949/12436 cut-off events. For 7191/7191 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81189 event pairs, 4055 based on Foata normal form. 6/11686 useless extension candidates. Maximal degree in co-relation 30550. Up to 11132 conditions per place. [2024-05-12 12:49:14,056 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 80 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-05-12 12:49:14,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 105 transitions, 583 flow [2024-05-12 12:49:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-05-12 12:49:14,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-05-12 12:49:14,059 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 280 flow. Second operand 6 states and 161 transitions. [2024-05-12 12:49:14,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 105 transitions, 583 flow [2024-05-12 12:49:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 553 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:14,075 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 331 flow [2024-05-12 12:49:14,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-05-12 12:49:14,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-05-12 12:49:14,077 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 331 flow [2024-05-12 12:49:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:14,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:14,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:49:14,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:14,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -382222254, now seen corresponding path program 1 times [2024-05-12 12:49:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981076081] [2024-05-12 12:49:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:14,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981076081] [2024-05-12 12:49:14,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981076081] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:14,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:14,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527000052] [2024-05-12 12:49:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:14,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:14,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:14,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:14,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:16,542 INFO L124 PetriNetUnfolderBase]: 9053/13919 cut-off events. [2024-05-12 12:49:16,542 INFO L125 PetriNetUnfolderBase]: For 12681/12681 co-relation queries the response was YES. [2024-05-12 12:49:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36749 conditions, 13919 events. 9053/13919 cut-off events. For 12681/12681 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 89049 event pairs, 4125 based on Foata normal form. 8/13106 useless extension candidates. Maximal degree in co-relation 36726. Up to 12528 conditions per place. [2024-05-12 12:49:16,618 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 87 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-05-12 12:49:16,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 118 transitions, 731 flow [2024-05-12 12:49:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-05-12 12:49:16,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2024-05-12 12:49:16,622 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 331 flow. Second operand 6 states and 151 transitions. [2024-05-12 12:49:16,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 118 transitions, 731 flow [2024-05-12 12:49:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 686 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:16,631 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 453 flow [2024-05-12 12:49:16,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2024-05-12 12:49:16,634 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2024-05-12 12:49:16,634 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 453 flow [2024-05-12 12:49:16,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:16,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:16,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:16,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:49:16,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:16,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash -348023364, now seen corresponding path program 2 times [2024-05-12 12:49:16,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:16,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438259851] [2024-05-12 12:49:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438259851] [2024-05-12 12:49:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438259851] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005269749] [2024-05-12 12:49:17,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:17,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:17,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:17,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 453 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:17,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:17,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:17,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:19,023 INFO L124 PetriNetUnfolderBase]: 9029/13889 cut-off events. [2024-05-12 12:49:19,023 INFO L125 PetriNetUnfolderBase]: For 17875/17878 co-relation queries the response was YES. [2024-05-12 12:49:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39324 conditions, 13889 events. 9029/13889 cut-off events. For 17875/17878 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 88914 event pairs, 4127 based on Foata normal form. 10/13080 useless extension candidates. Maximal degree in co-relation 39298. Up to 12512 conditions per place. [2024-05-12 12:49:19,108 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 82 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-05-12 12:49:19,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 731 flow [2024-05-12 12:49:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-05-12 12:49:19,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-05-12 12:49:19,111 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 453 flow. Second operand 6 states and 145 transitions. [2024-05-12 12:49:19,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 731 flow [2024-05-12 12:49:19,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 689 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:19,140 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 469 flow [2024-05-12 12:49:19,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-05-12 12:49:19,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-05-12 12:49:19,141 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 469 flow [2024-05-12 12:49:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:19,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:19,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:49:19,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:19,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2140444265, now seen corresponding path program 1 times [2024-05-12 12:49:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:19,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179627556] [2024-05-12 12:49:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179627556] [2024-05-12 12:49:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179627556] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:19,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:19,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:49:19,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095204090] [2024-05-12 12:49:19,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:19,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:49:19,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:49:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:49:19,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-05-12 12:49:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-05-12 12:49:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:19,985 INFO L124 PetriNetUnfolderBase]: 4089/7251 cut-off events. [2024-05-12 12:49:19,985 INFO L125 PetriNetUnfolderBase]: For 6781/6959 co-relation queries the response was YES. [2024-05-12 12:49:20,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 7251 events. 4089/7251 cut-off events. For 6781/6959 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 53131 event pairs, 1487 based on Foata normal form. 17/6853 useless extension candidates. Maximal degree in co-relation 17452. Up to 5134 conditions per place. [2024-05-12 12:49:20,023 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 49 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-05-12 12:49:20,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 570 flow [2024-05-12 12:49:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:49:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:49:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-05-12 12:49:20,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-05-12 12:49:20,025 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 469 flow. Second operand 3 states and 102 transitions. [2024-05-12 12:49:20,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 570 flow [2024-05-12 12:49:20,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 528 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:20,035 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 396 flow [2024-05-12 12:49:20,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-05-12 12:49:20,036 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-05-12 12:49:20,037 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 396 flow [2024-05-12 12:49:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:20,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:20,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:49:20,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:20,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2144296514, now seen corresponding path program 1 times [2024-05-12 12:49:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928836024] [2024-05-12 12:49:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:20,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:20,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:20,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928836024] [2024-05-12 12:49:20,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928836024] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:20,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:20,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:20,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220903209] [2024-05-12 12:49:20,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:20,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:20,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:20,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:20,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:22,204 INFO L124 PetriNetUnfolderBase]: 7589/11924 cut-off events. [2024-05-12 12:49:22,205 INFO L125 PetriNetUnfolderBase]: For 18762/18762 co-relation queries the response was YES. [2024-05-12 12:49:22,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32343 conditions, 11924 events. 7589/11924 cut-off events. For 18762/18762 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 76198 event pairs, 4666 based on Foata normal form. 1/11579 useless extension candidates. Maximal degree in co-relation 32315. Up to 10758 conditions per place. [2024-05-12 12:49:22,268 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 77 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-05-12 12:49:22,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 660 flow [2024-05-12 12:49:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-05-12 12:49:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452 [2024-05-12 12:49:22,270 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 396 flow. Second operand 5 states and 113 transitions. [2024-05-12 12:49:22,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 660 flow [2024-05-12 12:49:22,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:22,286 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 480 flow [2024-05-12 12:49:22,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-05-12 12:49:22,288 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-05-12 12:49:22,288 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 480 flow [2024-05-12 12:49:22,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:22,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:22,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:22,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:49:22,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:22,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1417947407, now seen corresponding path program 1 times [2024-05-12 12:49:22,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:22,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147918145] [2024-05-12 12:49:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:22,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:23,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147918145] [2024-05-12 12:49:23,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147918145] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:23,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:23,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:49:23,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91760886] [2024-05-12 12:49:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:23,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:49:23,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:23,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:49:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:49:23,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:23,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 480 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) [2024-05-12 12:49:23,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:23,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:23,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:25,675 INFO L124 PetriNetUnfolderBase]: 8045/12413 cut-off events. [2024-05-12 12:49:25,675 INFO L125 PetriNetUnfolderBase]: For 23803/23803 co-relation queries the response was YES. [2024-05-12 12:49:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35844 conditions, 12413 events. 8045/12413 cut-off events. For 23803/23803 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 77578 event pairs, 3370 based on Foata normal form. 8/12075 useless extension candidates. Maximal degree in co-relation 35813. Up to 11213 conditions per place. [2024-05-12 12:49:25,747 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 100 selfloop transitions, 21 changer transitions 1/129 dead transitions. [2024-05-12 12:49:25,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 854 flow [2024-05-12 12:49:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 12:49:25,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2024-05-12 12:49:25,750 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 480 flow. Second operand 7 states and 166 transitions. [2024-05-12 12:49:25,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 854 flow [2024-05-12 12:49:25,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 828 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:25,763 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 541 flow [2024-05-12 12:49:25,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=541, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-05-12 12:49:25,764 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-05-12 12:49:25,764 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 541 flow [2024-05-12 12:49:25,765 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) [2024-05-12 12:49:25,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:25,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:25,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:49:25,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:25,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2051489213, now seen corresponding path program 2 times [2024-05-12 12:49:25,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:25,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322040315] [2024-05-12 12:49:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:25,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322040315] [2024-05-12 12:49:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322040315] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:49:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431465060] [2024-05-12 12:49:26,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:49:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:49:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:49:27,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:27,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 541 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) [2024-05-12 12:49:27,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:27,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:27,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:28,702 INFO L124 PetriNetUnfolderBase]: 7247/11313 cut-off events. [2024-05-12 12:49:28,703 INFO L125 PetriNetUnfolderBase]: For 28880/28880 co-relation queries the response was YES. [2024-05-12 12:49:28,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34977 conditions, 11313 events. 7247/11313 cut-off events. For 28880/28880 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 71028 event pairs, 2515 based on Foata normal form. 8/10973 useless extension candidates. Maximal degree in co-relation 34944. Up to 9754 conditions per place. [2024-05-12 12:49:28,802 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 97 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-05-12 12:49:28,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 141 transitions, 1025 flow [2024-05-12 12:49:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 12:49:28,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-05-12 12:49:28,803 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 541 flow. Second operand 7 states and 173 transitions. [2024-05-12 12:49:28,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 141 transitions, 1025 flow [2024-05-12 12:49:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 141 transitions, 956 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:28,828 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 639 flow [2024-05-12 12:49:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-05-12 12:49:28,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-05-12 12:49:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 639 flow [2024-05-12 12:49:28,830 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) [2024-05-12 12:49:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:49:28,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1413294183, now seen corresponding path program 1 times [2024-05-12 12:49:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017936338] [2024-05-12 12:49:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:30,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017936338] [2024-05-12 12:49:30,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017936338] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:30,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:30,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604434606] [2024-05-12 12:49:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:30,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:30,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:30,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:30,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 639 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:30,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:30,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:30,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:31,783 INFO L124 PetriNetUnfolderBase]: 7371/11432 cut-off events. [2024-05-12 12:49:31,783 INFO L125 PetriNetUnfolderBase]: For 37736/37736 co-relation queries the response was YES. [2024-05-12 12:49:31,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37488 conditions, 11432 events. 7371/11432 cut-off events. For 37736/37736 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 71047 event pairs, 2784 based on Foata normal form. 8/11109 useless extension candidates. Maximal degree in co-relation 37455. Up to 9888 conditions per place. [2024-05-12 12:49:31,853 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-05-12 12:49:31,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 160 transitions, 1241 flow [2024-05-12 12:49:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 12:49:31,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 12:49:31,854 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 639 flow. Second operand 7 states and 177 transitions. [2024-05-12 12:49:31,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 160 transitions, 1241 flow [2024-05-12 12:49:31,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1181 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:31,892 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 774 flow [2024-05-12 12:49:31,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-05-12 12:49:31,892 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-05-12 12:49:31,892 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 774 flow [2024-05-12 12:49:31,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:31,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:31,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:31,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:49:31,893 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1388226015, now seen corresponding path program 3 times [2024-05-12 12:49:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:31,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711498085] [2024-05-12 12:49:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711498085] [2024-05-12 12:49:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711498085] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:33,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:33,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:49:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055979643] [2024-05-12 12:49:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:49:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:33,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:49:33,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:49:33,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 774 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) [2024-05-12 12:49:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:34,773 INFO L124 PetriNetUnfolderBase]: 7351/11487 cut-off events. [2024-05-12 12:49:34,773 INFO L125 PetriNetUnfolderBase]: For 44565/44574 co-relation queries the response was YES. [2024-05-12 12:49:34,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39583 conditions, 11487 events. 7351/11487 cut-off events. For 44565/44574 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 72418 event pairs, 2333 based on Foata normal form. 14/11141 useless extension candidates. Maximal degree in co-relation 39546. Up to 9914 conditions per place. [2024-05-12 12:49:34,829 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 102 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-05-12 12:49:34,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 1150 flow [2024-05-12 12:49:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 12:49:34,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 12:49:34,831 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 774 flow. Second operand 7 states and 168 transitions. [2024-05-12 12:49:34,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 1150 flow [2024-05-12 12:49:34,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 1098 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:34,872 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 805 flow [2024-05-12 12:49:34,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2024-05-12 12:49:34,872 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-05-12 12:49:34,873 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 805 flow [2024-05-12 12:49:34,873 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) [2024-05-12 12:49:34,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:34,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:49:34,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:34,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash 706269371, now seen corresponding path program 2 times [2024-05-12 12:49:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:34,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981411625] [2024-05-12 12:49:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:34,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:36,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981411625] [2024-05-12 12:49:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981411625] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:36,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:36,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:49:36,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637901569] [2024-05-12 12:49:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:49:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:49:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:49:36,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:36,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 805 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) [2024-05-12 12:49:36,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:36,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:38,004 INFO L124 PetriNetUnfolderBase]: 7455/11628 cut-off events. [2024-05-12 12:49:38,004 INFO L125 PetriNetUnfolderBase]: For 48800/48803 co-relation queries the response was YES. [2024-05-12 12:49:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40792 conditions, 11628 events. 7455/11628 cut-off events. For 48800/48803 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 73035 event pairs, 2748 based on Foata normal form. 10/11280 useless extension candidates. Maximal degree in co-relation 40753. Up to 9928 conditions per place. [2024-05-12 12:49:38,061 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 120 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2024-05-12 12:49:38,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 165 transitions, 1413 flow [2024-05-12 12:49:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-05-12 12:49:38,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-05-12 12:49:38,063 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 805 flow. Second operand 8 states and 187 transitions. [2024-05-12 12:49:38,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 165 transitions, 1413 flow [2024-05-12 12:49:38,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 165 transitions, 1301 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:38,101 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 874 flow [2024-05-12 12:49:38,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=874, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2024-05-12 12:49:38,102 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-05-12 12:49:38,102 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 874 flow [2024-05-12 12:49:38,103 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) [2024-05-12 12:49:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:38,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:49:38,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:38,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 706566041, now seen corresponding path program 3 times [2024-05-12 12:49:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144569062] [2024-05-12 12:49:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:39,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144569062] [2024-05-12 12:49:39,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144569062] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:39,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:39,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489597279] [2024-05-12 12:49:39,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:39,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:39,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:39,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:39,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:41,177 INFO L124 PetriNetUnfolderBase]: 7455/11634 cut-off events. [2024-05-12 12:49:41,178 INFO L125 PetriNetUnfolderBase]: For 54844/54844 co-relation queries the response was YES. [2024-05-12 12:49:41,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41620 conditions, 11634 events. 7455/11634 cut-off events. For 54844/54844 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 72888 event pairs, 3724 based on Foata normal form. 8/11284 useless extension candidates. Maximal degree in co-relation 41579. Up to 10382 conditions per place. [2024-05-12 12:49:41,251 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 129 selfloop transitions, 24 changer transitions 0/160 dead transitions. [2024-05-12 12:49:41,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1373 flow [2024-05-12 12:49:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 12:49:41,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657142857142857 [2024-05-12 12:49:41,253 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 874 flow. Second operand 7 states and 163 transitions. [2024-05-12 12:49:41,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1373 flow [2024-05-12 12:49:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 160 transitions, 1281 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:41,302 INFO L231 Difference]: Finished difference. Result has 102 places, 121 transitions, 944 flow [2024-05-12 12:49:41,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=102, PETRI_TRANSITIONS=121} [2024-05-12 12:49:41,303 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-05-12 12:49:41,303 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 121 transitions, 944 flow [2024-05-12 12:49:41,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:41,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:41,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:49:41,303 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:41,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2006815217, now seen corresponding path program 1 times [2024-05-12 12:49:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:41,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323259728] [2024-05-12 12:49:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:41,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:43,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323259728] [2024-05-12 12:49:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323259728] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:43,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:49:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263850191] [2024-05-12 12:49:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:43,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:49:43,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:49:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:49:43,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:43,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 944 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) [2024-05-12 12:49:43,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:43,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:43,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:44,801 INFO L124 PetriNetUnfolderBase]: 7447/11628 cut-off events. [2024-05-12 12:49:44,802 INFO L125 PetriNetUnfolderBase]: For 61173/61173 co-relation queries the response was YES. [2024-05-12 12:49:44,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42190 conditions, 11628 events. 7447/11628 cut-off events. For 61173/61173 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 73314 event pairs, 3669 based on Foata normal form. 4/11272 useless extension candidates. Maximal degree in co-relation 42146. Up to 10424 conditions per place. [2024-05-12 12:49:44,882 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 133 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-05-12 12:49:44,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 162 transitions, 1401 flow [2024-05-12 12:49:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-05-12 12:49:44,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-05-12 12:49:44,885 INFO L175 Difference]: Start difference. First operand has 102 places, 121 transitions, 944 flow. Second operand 7 states and 161 transitions. [2024-05-12 12:49:44,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 162 transitions, 1401 flow [2024-05-12 12:49:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1332 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:44,949 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 956 flow [2024-05-12 12:49:44,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=956, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2024-05-12 12:49:44,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-05-12 12:49:44,950 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 956 flow [2024-05-12 12:49:44,950 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) [2024-05-12 12:49:44,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:49:44,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:44,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2048680249, now seen corresponding path program 1 times [2024-05-12 12:49:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918517175] [2024-05-12 12:49:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:45,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918517175] [2024-05-12 12:49:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918517175] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:45,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:45,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240658771] [2024-05-12 12:49:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:45,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:45,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 956 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:45,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:45,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:47,261 INFO L124 PetriNetUnfolderBase]: 7132/11330 cut-off events. [2024-05-12 12:49:47,261 INFO L125 PetriNetUnfolderBase]: For 66090/66104 co-relation queries the response was YES. [2024-05-12 12:49:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41462 conditions, 11330 events. 7132/11330 cut-off events. For 66090/66104 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 73176 event pairs, 2769 based on Foata normal form. 9/10954 useless extension candidates. Maximal degree in co-relation 41417. Up to 9882 conditions per place. [2024-05-12 12:49:47,338 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 114 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-05-12 12:49:47,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1420 flow [2024-05-12 12:49:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 12:49:47,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-05-12 12:49:47,340 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 956 flow. Second operand 6 states and 142 transitions. [2024-05-12 12:49:47,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1420 flow [2024-05-12 12:49:47,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 158 transitions, 1361 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:47,411 INFO L231 Difference]: Finished difference. Result has 107 places, 132 transitions, 1065 flow [2024-05-12 12:49:47,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=107, PETRI_TRANSITIONS=132} [2024-05-12 12:49:47,412 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-05-12 12:49:47,412 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 132 transitions, 1065 flow [2024-05-12 12:49:47,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:47,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:47,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:47,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:49:47,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:47,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash -300007653, now seen corresponding path program 1 times [2024-05-12 12:49:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:47,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741618556] [2024-05-12 12:49:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741618556] [2024-05-12 12:49:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741618556] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:48,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:48,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126199443] [2024-05-12 12:49:48,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:48,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:48,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 132 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:48,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:48,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:48,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:49,592 INFO L124 PetriNetUnfolderBase]: 7193/11418 cut-off events. [2024-05-12 12:49:49,593 INFO L125 PetriNetUnfolderBase]: For 76635/76649 co-relation queries the response was YES. [2024-05-12 12:49:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44411 conditions, 11418 events. 7193/11418 cut-off events. For 76635/76649 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 73433 event pairs, 3063 based on Foata normal form. 7/11042 useless extension candidates. Maximal degree in co-relation 44364. Up to 10060 conditions per place. [2024-05-12 12:49:49,673 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 129 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-05-12 12:49:49,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 1601 flow [2024-05-12 12:49:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 12:49:49,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-05-12 12:49:49,675 INFO L175 Difference]: Start difference. First operand has 107 places, 132 transitions, 1065 flow. Second operand 7 states and 165 transitions. [2024-05-12 12:49:49,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 1601 flow [2024-05-12 12:49:49,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 1535 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:49,765 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1243 flow [2024-05-12 12:49:49,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1243, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-05-12 12:49:49,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 12:49:49,766 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1243 flow [2024-05-12 12:49:49,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:49,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:49,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:49,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:49:49,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:49,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1962579613, now seen corresponding path program 2 times [2024-05-12 12:49:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968257675] [2024-05-12 12:49:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:49,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:50,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:50,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968257675] [2024-05-12 12:49:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968257675] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:50,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:50,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800899266] [2024-05-12 12:49:50,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:50,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:50,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:50,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:50,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:50,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:50,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:50,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:50,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:51,962 INFO L124 PetriNetUnfolderBase]: 7239/11483 cut-off events. [2024-05-12 12:49:51,962 INFO L125 PetriNetUnfolderBase]: For 85240/85254 co-relation queries the response was YES. [2024-05-12 12:49:52,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47268 conditions, 11483 events. 7239/11483 cut-off events. For 85240/85254 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 73766 event pairs, 3063 based on Foata normal form. 7/11106 useless extension candidates. Maximal degree in co-relation 47217. Up to 10094 conditions per place. [2024-05-12 12:49:52,049 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 127 selfloop transitions, 33 changer transitions 0/178 dead transitions. [2024-05-12 12:49:52,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 1708 flow [2024-05-12 12:49:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 12:49:52,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-05-12 12:49:52,050 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1243 flow. Second operand 6 states and 143 transitions. [2024-05-12 12:49:52,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 1708 flow [2024-05-12 12:49:52,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 178 transitions, 1659 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:52,149 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1333 flow [2024-05-12 12:49:52,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1333, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-05-12 12:49:52,149 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-05-12 12:49:52,149 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1333 flow [2024-05-12 12:49:52,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:52,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:52,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:52,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:49:52,150 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:52,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash 915407133, now seen corresponding path program 3 times [2024-05-12 12:49:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:52,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448110119] [2024-05-12 12:49:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:52,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:52,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:52,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448110119] [2024-05-12 12:49:52,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448110119] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:52,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:52,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:52,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060593532] [2024-05-12 12:49:52,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:52,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:52,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:52,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:49:52,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1333 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:52,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:52,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:49:52,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:54,428 INFO L124 PetriNetUnfolderBase]: 7258/11517 cut-off events. [2024-05-12 12:49:54,428 INFO L125 PetriNetUnfolderBase]: For 91640/91653 co-relation queries the response was YES. [2024-05-12 12:49:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47874 conditions, 11517 events. 7258/11517 cut-off events. For 91640/91653 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 74038 event pairs, 3060 based on Foata normal form. 10/11141 useless extension candidates. Maximal degree in co-relation 47821. Up to 9917 conditions per place. [2024-05-12 12:49:54,495 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 123 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-05-12 12:49:54,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 1914 flow [2024-05-12 12:49:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 12:49:54,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-05-12 12:49:54,497 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1333 flow. Second operand 6 states and 143 transitions. [2024-05-12 12:49:54,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 1914 flow [2024-05-12 12:49:54,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1816 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:54,591 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1494 flow [2024-05-12 12:49:54,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1494, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-05-12 12:49:54,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-05-12 12:49:54,592 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1494 flow [2024-05-12 12:49:54,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:54,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:54,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:54,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:49:54,593 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:54,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash 908718077, now seen corresponding path program 1 times [2024-05-12 12:49:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233081926] [2024-05-12 12:49:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:55,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233081926] [2024-05-12 12:49:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233081926] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:55,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:55,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:55,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235855794] [2024-05-12 12:49:55,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:55,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:55,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:55,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1494 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:55,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:55,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:55,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:56,905 INFO L124 PetriNetUnfolderBase]: 7745/12037 cut-off events. [2024-05-12 12:49:56,905 INFO L125 PetriNetUnfolderBase]: For 99501/99501 co-relation queries the response was YES. [2024-05-12 12:49:56,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52290 conditions, 12037 events. 7745/12037 cut-off events. For 99501/99501 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 74903 event pairs, 3407 based on Foata normal form. 4/11679 useless extension candidates. Maximal degree in co-relation 52235. Up to 10893 conditions per place. [2024-05-12 12:49:56,975 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 170 selfloop transitions, 14 changer transitions 0/191 dead transitions. [2024-05-12 12:49:56,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 191 transitions, 2024 flow [2024-05-12 12:49:56,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:49:56,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2024-05-12 12:49:56,977 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1494 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:49:56,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 191 transitions, 2024 flow [2024-05-12 12:49:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1912 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:57,073 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1517 flow [2024-05-12 12:49:57,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1517, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-05-12 12:49:57,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-05-12 12:49:57,073 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1517 flow [2024-05-12 12:49:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:57,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:57,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:49:57,074 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:57,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1459104663, now seen corresponding path program 2 times [2024-05-12 12:49:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:57,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608209045] [2024-05-12 12:49:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:57,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608209045] [2024-05-12 12:49:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608209045] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:57,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:57,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341205205] [2024-05-12 12:49:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:57,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:57,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:49:57,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1517 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:57,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:57,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:49:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:59,574 INFO L124 PetriNetUnfolderBase]: 7790/12099 cut-off events. [2024-05-12 12:49:59,575 INFO L125 PetriNetUnfolderBase]: For 110304/110307 co-relation queries the response was YES. [2024-05-12 12:49:59,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54720 conditions, 12099 events. 7790/12099 cut-off events. For 110304/110307 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 75325 event pairs, 3393 based on Foata normal form. 6/11742 useless extension candidates. Maximal degree in co-relation 54663. Up to 10909 conditions per place. [2024-05-12 12:49:59,665 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 167 selfloop transitions, 23 changer transitions 0/197 dead transitions. [2024-05-12 12:49:59,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 197 transitions, 2075 flow [2024-05-12 12:49:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-05-12 12:49:59,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-05-12 12:49:59,667 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1517 flow. Second operand 7 states and 145 transitions. [2024-05-12 12:49:59,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 197 transitions, 2075 flow [2024-05-12 12:49:59,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 197 transitions, 2021 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:59,782 INFO L231 Difference]: Finished difference. Result has 130 places, 175 transitions, 1607 flow [2024-05-12 12:49:59,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1607, PETRI_PLACES=130, PETRI_TRANSITIONS=175} [2024-05-12 12:49:59,782 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-05-12 12:49:59,783 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 175 transitions, 1607 flow [2024-05-12 12:49:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:59,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:59,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:59,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:49:59,783 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:49:59,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 915423997, now seen corresponding path program 1 times [2024-05-12 12:49:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:59,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080190314] [2024-05-12 12:49:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080190314] [2024-05-12 12:50:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080190314] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002385754] [2024-05-12 12:50:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:00,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:00,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:01,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:50:01,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 175 transitions, 1607 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:01,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:01,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:50:01,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:02,745 INFO L124 PetriNetUnfolderBase]: 7487/11856 cut-off events. [2024-05-12 12:50:02,745 INFO L125 PetriNetUnfolderBase]: For 120284/120301 co-relation queries the response was YES. [2024-05-12 12:50:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55185 conditions, 11856 events. 7487/11856 cut-off events. For 120284/120301 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 76313 event pairs, 2698 based on Foata normal form. 9/11466 useless extension candidates. Maximal degree in co-relation 55126. Up to 10100 conditions per place. [2024-05-12 12:50:02,838 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 152 selfloop transitions, 56 changer transitions 0/226 dead transitions. [2024-05-12 12:50:02,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 226 transitions, 2421 flow [2024-05-12 12:50:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 12:50:02,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 12:50:02,839 INFO L175 Difference]: Start difference. First operand has 130 places, 175 transitions, 1607 flow. Second operand 7 states and 168 transitions. [2024-05-12 12:50:02,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 226 transitions, 2421 flow [2024-05-12 12:50:02,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 226 transitions, 2351 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:02,962 INFO L231 Difference]: Finished difference. Result has 137 places, 189 transitions, 1925 flow [2024-05-12 12:50:02,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1925, PETRI_PLACES=137, PETRI_TRANSITIONS=189} [2024-05-12 12:50:02,962 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 12:50:02,963 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 189 transitions, 1925 flow [2024-05-12 12:50:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:02,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:02,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:02,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:50:02,963 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:02,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash -709433674, now seen corresponding path program 1 times [2024-05-12 12:50:02,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:02,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839138480] [2024-05-12 12:50:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:04,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839138480] [2024-05-12 12:50:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839138480] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:04,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 12:50:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722161815] [2024-05-12 12:50:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:04,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:50:04,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:50:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:50:04,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:04,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 189 transitions, 1925 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:04,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:04,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:04,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:06,738 INFO L124 PetriNetUnfolderBase]: 8080/12544 cut-off events. [2024-05-12 12:50:06,739 INFO L125 PetriNetUnfolderBase]: For 148077/148077 co-relation queries the response was YES. [2024-05-12 12:50:06,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62349 conditions, 12544 events. 8080/12544 cut-off events. For 148077/148077 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 78250 event pairs, 2244 based on Foata normal form. 8/12179 useless extension candidates. Maximal degree in co-relation 62285. Up to 10837 conditions per place. [2024-05-12 12:50:06,885 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 200 selfloop transitions, 47 changer transitions 0/254 dead transitions. [2024-05-12 12:50:06,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 254 transitions, 2821 flow [2024-05-12 12:50:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-05-12 12:50:06,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-05-12 12:50:06,887 INFO L175 Difference]: Start difference. First operand has 137 places, 189 transitions, 1925 flow. Second operand 9 states and 215 transitions. [2024-05-12 12:50:06,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 254 transitions, 2821 flow [2024-05-12 12:50:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 254 transitions, 2743 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:07,060 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2071 flow [2024-05-12 12:50:07,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2071, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2024-05-12 12:50:07,060 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-05-12 12:50:07,060 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2071 flow [2024-05-12 12:50:07,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:07,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:07,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:07,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:50:07,061 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:07,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1256381510, now seen corresponding path program 2 times [2024-05-12 12:50:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:07,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571150862] [2024-05-12 12:50:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571150862] [2024-05-12 12:50:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571150862] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:08,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 12:50:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015538371] [2024-05-12 12:50:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:08,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:50:08,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:50:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:50:08,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:08,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 2071 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:08,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:08,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:08,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:10,622 INFO L124 PetriNetUnfolderBase]: 8064/12520 cut-off events. [2024-05-12 12:50:10,622 INFO L125 PetriNetUnfolderBase]: For 160650/160650 co-relation queries the response was YES. [2024-05-12 12:50:10,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63133 conditions, 12520 events. 8064/12520 cut-off events. For 160650/160650 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 78295 event pairs, 2960 based on Foata normal form. 8/12155 useless extension candidates. Maximal degree in co-relation 63066. Up to 11137 conditions per place. [2024-05-12 12:50:10,725 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 204 selfloop transitions, 31 changer transitions 0/242 dead transitions. [2024-05-12 12:50:10,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 242 transitions, 2713 flow [2024-05-12 12:50:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-05-12 12:50:10,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-05-12 12:50:10,727 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 2071 flow. Second operand 8 states and 187 transitions. [2024-05-12 12:50:10,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 242 transitions, 2713 flow [2024-05-12 12:50:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 242 transitions, 2575 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:10,949 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2003 flow [2024-05-12 12:50:10,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2003, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2024-05-12 12:50:10,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-05-12 12:50:10,950 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2003 flow [2024-05-12 12:50:10,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:10,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:10,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:50:10,951 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -306392628, now seen corresponding path program 1 times [2024-05-12 12:50:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504056767] [2024-05-12 12:50:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:12,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:12,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504056767] [2024-05-12 12:50:12,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504056767] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:12,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:12,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348354447] [2024-05-12 12:50:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:12,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:12,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2003 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:12,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:12,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:12,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:14,317 INFO L124 PetriNetUnfolderBase]: 8188/12695 cut-off events. [2024-05-12 12:50:14,317 INFO L125 PetriNetUnfolderBase]: For 168094/168094 co-relation queries the response was YES. [2024-05-12 12:50:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64097 conditions, 12695 events. 8188/12695 cut-off events. For 168094/168094 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 79240 event pairs, 2984 based on Foata normal form. 8/12329 useless extension candidates. Maximal degree in co-relation 64028. Up to 11258 conditions per place. [2024-05-12 12:50:14,426 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 207 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-05-12 12:50:14,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 254 transitions, 2803 flow [2024-05-12 12:50:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 12:50:14,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-05-12 12:50:14,428 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2003 flow. Second operand 8 states and 193 transitions. [2024-05-12 12:50:14,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 254 transitions, 2803 flow [2024-05-12 12:50:14,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 254 transitions, 2733 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:14,629 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2168 flow [2024-05-12 12:50:14,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2168, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-05-12 12:50:14,630 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-05-12 12:50:14,630 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2168 flow [2024-05-12 12:50:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:14,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:50:14,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:14,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -190928478, now seen corresponding path program 2 times [2024-05-12 12:50:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:14,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520510268] [2024-05-12 12:50:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:14,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:16,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:16,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520510268] [2024-05-12 12:50:16,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520510268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:16,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:16,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172241662] [2024-05-12 12:50:16,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:16,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:16,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2168 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:16,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:16,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:16,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:18,414 INFO L124 PetriNetUnfolderBase]: 8476/13117 cut-off events. [2024-05-12 12:50:18,414 INFO L125 PetriNetUnfolderBase]: For 194565/194568 co-relation queries the response was YES. [2024-05-12 12:50:18,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69121 conditions, 13117 events. 8476/13117 cut-off events. For 194565/194568 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 81911 event pairs, 2325 based on Foata normal form. 8/12743 useless extension candidates. Maximal degree in co-relation 69050. Up to 10490 conditions per place. [2024-05-12 12:50:18,539 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 208 selfloop transitions, 71 changer transitions 0/286 dead transitions. [2024-05-12 12:50:18,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 286 transitions, 3502 flow [2024-05-12 12:50:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 12:50:18,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 12:50:18,541 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2168 flow. Second operand 8 states and 211 transitions. [2024-05-12 12:50:18,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 286 transitions, 3502 flow [2024-05-12 12:50:18,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 286 transitions, 3301 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:18,829 INFO L231 Difference]: Finished difference. Result has 155 places, 215 transitions, 2370 flow [2024-05-12 12:50:18,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2370, PETRI_PLACES=155, PETRI_TRANSITIONS=215} [2024-05-12 12:50:18,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-05-12 12:50:18,829 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 215 transitions, 2370 flow [2024-05-12 12:50:18,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:18,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:18,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:18,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:50:18,830 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:18,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash 957630554, now seen corresponding path program 3 times [2024-05-12 12:50:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:18,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487676768] [2024-05-12 12:50:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:20,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:20,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487676768] [2024-05-12 12:50:20,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487676768] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:20,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:20,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846906319] [2024-05-12 12:50:20,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:20,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:20,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:20,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 215 transitions, 2370 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:20,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:20,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:20,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:22,680 INFO L124 PetriNetUnfolderBase]: 8456/13101 cut-off events. [2024-05-12 12:50:22,680 INFO L125 PetriNetUnfolderBase]: For 206140/206143 co-relation queries the response was YES. [2024-05-12 12:50:22,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70417 conditions, 13101 events. 8456/13101 cut-off events. For 206140/206143 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 82037 event pairs, 2399 based on Foata normal form. 8/12723 useless extension candidates. Maximal degree in co-relation 70345. Up to 10478 conditions per place. [2024-05-12 12:50:22,784 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 201 selfloop transitions, 78 changer transitions 0/286 dead transitions. [2024-05-12 12:50:22,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 286 transitions, 3460 flow [2024-05-12 12:50:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 12:50:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 12:50:22,785 INFO L175 Difference]: Start difference. First operand has 155 places, 215 transitions, 2370 flow. Second operand 8 states and 207 transitions. [2024-05-12 12:50:22,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 286 transitions, 3460 flow [2024-05-12 12:50:23,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 286 transitions, 3341 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:23,047 INFO L231 Difference]: Finished difference. Result has 162 places, 220 transitions, 2552 flow [2024-05-12 12:50:23,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2552, PETRI_PLACES=162, PETRI_TRANSITIONS=220} [2024-05-12 12:50:23,048 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-05-12 12:50:23,048 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 220 transitions, 2552 flow [2024-05-12 12:50:23,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:23,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:23,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:23,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:50:23,049 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:23,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:23,049 INFO L85 PathProgramCache]: Analyzing trace with hash 957446104, now seen corresponding path program 3 times [2024-05-12 12:50:23,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:23,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111412837] [2024-05-12 12:50:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:23,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:24,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111412837] [2024-05-12 12:50:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111412837] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 12:50:24,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677681283] [2024-05-12 12:50:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:50:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:50:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:50:24,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:24,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 220 transitions, 2552 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:24,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:24,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:24,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:26,665 INFO L124 PetriNetUnfolderBase]: 8524/13212 cut-off events. [2024-05-12 12:50:26,665 INFO L125 PetriNetUnfolderBase]: For 214137/214140 co-relation queries the response was YES. [2024-05-12 12:50:26,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71818 conditions, 13212 events. 8524/13212 cut-off events. For 214137/214140 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 83020 event pairs, 2654 based on Foata normal form. 8/12831 useless extension candidates. Maximal degree in co-relation 71743. Up to 11439 conditions per place. [2024-05-12 12:50:26,806 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 219 selfloop transitions, 48 changer transitions 0/274 dead transitions. [2024-05-12 12:50:26,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 274 transitions, 3354 flow [2024-05-12 12:50:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 12:50:26,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-05-12 12:50:26,808 INFO L175 Difference]: Start difference. First operand has 162 places, 220 transitions, 2552 flow. Second operand 8 states and 193 transitions. [2024-05-12 12:50:26,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 274 transitions, 3354 flow [2024-05-12 12:50:27,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 274 transitions, 3222 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:27,133 INFO L231 Difference]: Finished difference. Result has 166 places, 223 transitions, 2602 flow [2024-05-12 12:50:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2602, PETRI_PLACES=166, PETRI_TRANSITIONS=223} [2024-05-12 12:50:27,134 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-05-12 12:50:27,134 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 223 transitions, 2602 flow [2024-05-12 12:50:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:27,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:27,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:50:27,135 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:27,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2101736589, now seen corresponding path program 1 times [2024-05-12 12:50:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269211747] [2024-05-12 12:50:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:28,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:28,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269211747] [2024-05-12 12:50:28,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269211747] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:28,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:28,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795535293] [2024-05-12 12:50:28,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:28,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:50:28,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 223 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:28,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:28,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:50:28,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:30,056 INFO L124 PetriNetUnfolderBase]: 8040/12664 cut-off events. [2024-05-12 12:50:30,057 INFO L125 PetriNetUnfolderBase]: For 217756/217803 co-relation queries the response was YES. [2024-05-12 12:50:30,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69263 conditions, 12664 events. 8040/12664 cut-off events. For 217756/217803 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 81562 event pairs, 2957 based on Foata normal form. 9/12245 useless extension candidates. Maximal degree in co-relation 69187. Up to 11166 conditions per place. [2024-05-12 12:50:30,205 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 200 selfloop transitions, 34 changer transitions 0/252 dead transitions. [2024-05-12 12:50:30,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 252 transitions, 3224 flow [2024-05-12 12:50:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 12:50:30,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-05-12 12:50:30,207 INFO L175 Difference]: Start difference. First operand has 166 places, 223 transitions, 2602 flow. Second operand 6 states and 142 transitions. [2024-05-12 12:50:30,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 252 transitions, 3224 flow [2024-05-12 12:50:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 252 transitions, 3028 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:30,560 INFO L231 Difference]: Finished difference. Result has 166 places, 226 transitions, 2556 flow [2024-05-12 12:50:30,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2556, PETRI_PLACES=166, PETRI_TRANSITIONS=226} [2024-05-12 12:50:30,561 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-05-12 12:50:30,562 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 226 transitions, 2556 flow [2024-05-12 12:50:30,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:30,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:30,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:50:30,562 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:30,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash -965974568, now seen corresponding path program 1 times [2024-05-12 12:50:30,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:30,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218481730] [2024-05-12 12:50:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:30,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218481730] [2024-05-12 12:50:32,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218481730] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:32,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:32,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589446894] [2024-05-12 12:50:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:32,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:32,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 226 transitions, 2556 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:32,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:32,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:32,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:34,921 INFO L124 PetriNetUnfolderBase]: 8587/13307 cut-off events. [2024-05-12 12:50:34,921 INFO L125 PetriNetUnfolderBase]: For 228965/228968 co-relation queries the response was YES. [2024-05-12 12:50:35,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72122 conditions, 13307 events. 8587/13307 cut-off events. For 228965/228968 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 83457 event pairs, 2977 based on Foata normal form. 8/12925 useless extension candidates. Maximal degree in co-relation 72045. Up to 11390 conditions per place. [2024-05-12 12:50:35,090 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 228 selfloop transitions, 52 changer transitions 0/287 dead transitions. [2024-05-12 12:50:35,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 287 transitions, 3466 flow [2024-05-12 12:50:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 12:50:35,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-05-12 12:50:35,092 INFO L175 Difference]: Start difference. First operand has 166 places, 226 transitions, 2556 flow. Second operand 8 states and 198 transitions. [2024-05-12 12:50:35,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 287 transitions, 3466 flow [2024-05-12 12:50:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 287 transitions, 3398 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:35,409 INFO L231 Difference]: Finished difference. Result has 170 places, 229 transitions, 2666 flow [2024-05-12 12:50:35,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2666, PETRI_PLACES=170, PETRI_TRANSITIONS=229} [2024-05-12 12:50:35,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-05-12 12:50:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 229 transitions, 2666 flow [2024-05-12 12:50:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:35,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:35,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:35,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:50:35,411 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1538961670, now seen corresponding path program 4 times [2024-05-12 12:50:35,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:35,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882027536] [2024-05-12 12:50:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:35,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882027536] [2024-05-12 12:50:36,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882027536] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:36,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 12:50:36,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063548730] [2024-05-12 12:50:36,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:36,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:50:36,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:36,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:50:36,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:50:36,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:36,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 229 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:36,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:36,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:36,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:39,121 INFO L124 PetriNetUnfolderBase]: 8571/13302 cut-off events. [2024-05-12 12:50:39,121 INFO L125 PetriNetUnfolderBase]: For 234575/234584 co-relation queries the response was YES. [2024-05-12 12:50:39,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73046 conditions, 13302 events. 8571/13302 cut-off events. For 234575/234584 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83585 event pairs, 2630 based on Foata normal form. 12/12914 useless extension candidates. Maximal degree in co-relation 72968. Up to 11509 conditions per place. [2024-05-12 12:50:39,269 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 227 selfloop transitions, 47 changer transitions 0/281 dead transitions. [2024-05-12 12:50:39,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 281 transitions, 3484 flow [2024-05-12 12:50:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 12:50:39,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-05-12 12:50:39,271 INFO L175 Difference]: Start difference. First operand has 170 places, 229 transitions, 2666 flow. Second operand 8 states and 190 transitions. [2024-05-12 12:50:39,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 281 transitions, 3484 flow [2024-05-12 12:50:39,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 281 transitions, 3330 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:39,840 INFO L231 Difference]: Finished difference. Result has 172 places, 232 transitions, 2698 flow [2024-05-12 12:50:39,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=172, PETRI_TRANSITIONS=232} [2024-05-12 12:50:39,840 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-05-12 12:50:39,840 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 232 transitions, 2698 flow [2024-05-12 12:50:39,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:39,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:39,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:50:39,841 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:39,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1538321938, now seen corresponding path program 4 times [2024-05-12 12:50:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719201136] [2024-05-12 12:50:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:41,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719201136] [2024-05-12 12:50:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719201136] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:41,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:41,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155496116] [2024-05-12 12:50:41,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:41,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:41,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 232 transitions, 2698 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:41,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:41,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:43,548 INFO L124 PetriNetUnfolderBase]: 8799/13602 cut-off events. [2024-05-12 12:50:43,548 INFO L125 PetriNetUnfolderBase]: For 260683/260689 co-relation queries the response was YES. [2024-05-12 12:50:43,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76044 conditions, 13602 events. 8799/13602 cut-off events. For 260683/260689 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 85083 event pairs, 2389 based on Foata normal form. 12/13220 useless extension candidates. Maximal degree in co-relation 75965. Up to 10796 conditions per place. [2024-05-12 12:50:43,665 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 218 selfloop transitions, 80 changer transitions 0/305 dead transitions. [2024-05-12 12:50:43,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 305 transitions, 3974 flow [2024-05-12 12:50:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 12:50:43,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 12:50:43,667 INFO L175 Difference]: Start difference. First operand has 172 places, 232 transitions, 2698 flow. Second operand 8 states and 208 transitions. [2024-05-12 12:50:43,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 305 transitions, 3974 flow [2024-05-12 12:50:43,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 305 transitions, 3812 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:43,957 INFO L231 Difference]: Finished difference. Result has 175 places, 239 transitions, 2862 flow [2024-05-12 12:50:43,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2862, PETRI_PLACES=175, PETRI_TRANSITIONS=239} [2024-05-12 12:50:43,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-05-12 12:50:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 239 transitions, 2862 flow [2024-05-12 12:50:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:50:43,958 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:43,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1759973488, now seen corresponding path program 5 times [2024-05-12 12:50:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901271088] [2024-05-12 12:50:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901271088] [2024-05-12 12:50:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901271088] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:45,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:45,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795772031] [2024-05-12 12:50:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:45,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:45,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 239 transitions, 2862 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:45,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:45,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:45,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:47,620 INFO L124 PetriNetUnfolderBase]: 8779/13574 cut-off events. [2024-05-12 12:50:47,620 INFO L125 PetriNetUnfolderBase]: For 271548/271554 co-relation queries the response was YES. [2024-05-12 12:50:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76860 conditions, 13574 events. 8779/13574 cut-off events. For 271548/271554 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84952 event pairs, 2385 based on Foata normal form. 12/13192 useless extension candidates. Maximal degree in co-relation 76779. Up to 10784 conditions per place. [2024-05-12 12:50:47,765 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 214 selfloop transitions, 81 changer transitions 0/302 dead transitions. [2024-05-12 12:50:47,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 302 transitions, 3892 flow [2024-05-12 12:50:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 12:50:47,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 12:50:47,766 INFO L175 Difference]: Start difference. First operand has 175 places, 239 transitions, 2862 flow. Second operand 8 states and 204 transitions. [2024-05-12 12:50:47,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 302 transitions, 3892 flow [2024-05-12 12:50:48,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 3670 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:48,200 INFO L231 Difference]: Finished difference. Result has 178 places, 239 transitions, 2811 flow [2024-05-12 12:50:48,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2811, PETRI_PLACES=178, PETRI_TRANSITIONS=239} [2024-05-12 12:50:48,201 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-05-12 12:50:48,201 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 239 transitions, 2811 flow [2024-05-12 12:50:48,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:48,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:48,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:48,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:50:48,201 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:48,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 233794606, now seen corresponding path program 2 times [2024-05-12 12:50:48,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:48,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298532382] [2024-05-12 12:50:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:49,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:49,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298532382] [2024-05-12 12:50:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298532382] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:49,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:49,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:49,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052113074] [2024-05-12 12:50:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:49,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:49,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:49,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:49,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 239 transitions, 2811 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:49,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:49,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:49,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:52,342 INFO L124 PetriNetUnfolderBase]: 8863/13718 cut-off events. [2024-05-12 12:50:52,342 INFO L125 PetriNetUnfolderBase]: For 274118/274121 co-relation queries the response was YES. [2024-05-12 12:50:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77228 conditions, 13718 events. 8863/13718 cut-off events. For 274118/274121 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 86178 event pairs, 3002 based on Foata normal form. 10/13328 useless extension candidates. Maximal degree in co-relation 77146. Up to 11778 conditions per place. [2024-05-12 12:50:52,446 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 239 selfloop transitions, 51 changer transitions 0/297 dead transitions. [2024-05-12 12:50:52,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 297 transitions, 3727 flow [2024-05-12 12:50:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 12:50:52,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-05-12 12:50:52,448 INFO L175 Difference]: Start difference. First operand has 178 places, 239 transitions, 2811 flow. Second operand 8 states and 195 transitions. [2024-05-12 12:50:52,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 297 transitions, 3727 flow [2024-05-12 12:50:52,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 297 transitions, 3550 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:52,798 INFO L231 Difference]: Finished difference. Result has 179 places, 242 transitions, 2820 flow [2024-05-12 12:50:52,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2820, PETRI_PLACES=179, PETRI_TRANSITIONS=242} [2024-05-12 12:50:52,799 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-05-12 12:50:52,799 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 242 transitions, 2820 flow [2024-05-12 12:50:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:52,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:52,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:52,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:50:52,799 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:52,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1530047728, now seen corresponding path program 6 times [2024-05-12 12:50:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:52,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045117149] [2024-05-12 12:50:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045117149] [2024-05-12 12:50:54,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045117149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:54,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:54,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 12:50:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633742836] [2024-05-12 12:50:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 12:50:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:54,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 12:50:54,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:50:54,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:54,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 242 transitions, 2820 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:54,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:54,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:56,569 INFO L124 PetriNetUnfolderBase]: 8863/13727 cut-off events. [2024-05-12 12:50:56,570 INFO L125 PetriNetUnfolderBase]: For 286609/286609 co-relation queries the response was YES. [2024-05-12 12:50:56,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77542 conditions, 13727 events. 8863/13727 cut-off events. For 286609/286609 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 86348 event pairs, 3360 based on Foata normal form. 8/13335 useless extension candidates. Maximal degree in co-relation 77460. Up to 12254 conditions per place. [2024-05-12 12:50:56,716 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 256 selfloop transitions, 31 changer transitions 0/294 dead transitions. [2024-05-12 12:50:56,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 294 transitions, 3680 flow [2024-05-12 12:50:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-05-12 12:50:56,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-05-12 12:50:56,717 INFO L175 Difference]: Start difference. First operand has 179 places, 242 transitions, 2820 flow. Second operand 8 states and 187 transitions. [2024-05-12 12:50:56,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 294 transitions, 3680 flow [2024-05-12 12:50:57,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 3494 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:57,155 INFO L231 Difference]: Finished difference. Result has 181 places, 246 transitions, 2801 flow [2024-05-12 12:50:57,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2801, PETRI_PLACES=181, PETRI_TRANSITIONS=246} [2024-05-12 12:50:57,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-05-12 12:50:57,156 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 246 transitions, 2801 flow [2024-05-12 12:50:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:57,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:50:57,156 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:50:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash 988498214, now seen corresponding path program 3 times [2024-05-12 12:50:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221769146] [2024-05-12 12:50:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:58,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221769146] [2024-05-12 12:50:58,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221769146] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:58,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:58,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:50:58,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873786341] [2024-05-12 12:50:58,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:58,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:50:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:50:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:50:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:50:58,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 246 transitions, 2801 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:58,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:58,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:50:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:01,275 INFO L124 PetriNetUnfolderBase]: 8947/13863 cut-off events. [2024-05-12 12:51:01,275 INFO L125 PetriNetUnfolderBase]: For 299303/299303 co-relation queries the response was YES. [2024-05-12 12:51:01,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78188 conditions, 13863 events. 8947/13863 cut-off events. For 299303/299303 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 87411 event pairs, 3422 based on Foata normal form. 8/13467 useless extension candidates. Maximal degree in co-relation 78105. Up to 12378 conditions per place. [2024-05-12 12:51:01,422 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 260 selfloop transitions, 30 changer transitions 0/297 dead transitions. [2024-05-12 12:51:01,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 297 transitions, 3663 flow [2024-05-12 12:51:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-05-12 12:51:01,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-05-12 12:51:01,423 INFO L175 Difference]: Start difference. First operand has 181 places, 246 transitions, 2801 flow. Second operand 8 states and 186 transitions. [2024-05-12 12:51:01,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 297 transitions, 3663 flow [2024-05-12 12:51:01,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 297 transitions, 3550 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:01,901 INFO L231 Difference]: Finished difference. Result has 183 places, 249 transitions, 2840 flow [2024-05-12 12:51:01,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2840, PETRI_PLACES=183, PETRI_TRANSITIONS=249} [2024-05-12 12:51:01,902 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-05-12 12:51:01,902 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 249 transitions, 2840 flow [2024-05-12 12:51:01,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:01,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:01,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:01,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:51:01,903 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:01,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 415677912, now seen corresponding path program 4 times [2024-05-12 12:51:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:01,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018793719] [2024-05-12 12:51:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:01,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:03,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:03,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018793719] [2024-05-12 12:51:03,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018793719] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:03,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:03,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 12:51:03,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716880375] [2024-05-12 12:51:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:03,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 12:51:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 12:51:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 12:51:03,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:03,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 249 transitions, 2840 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:03,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:03,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:03,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:05,814 INFO L124 PetriNetUnfolderBase]: 8955/13803 cut-off events. [2024-05-12 12:51:05,815 INFO L125 PetriNetUnfolderBase]: For 314274/314274 co-relation queries the response was YES. [2024-05-12 12:51:05,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78880 conditions, 13803 events. 8955/13803 cut-off events. For 314274/314274 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86451 event pairs, 3288 based on Foata normal form. 8/13431 useless extension candidates. Maximal degree in co-relation 78796. Up to 12262 conditions per place. [2024-05-12 12:51:05,954 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 270 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-05-12 12:51:05,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 313 transitions, 3836 flow [2024-05-12 12:51:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:51:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:51:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-05-12 12:51:05,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-05-12 12:51:05,956 INFO L175 Difference]: Start difference. First operand has 183 places, 249 transitions, 2840 flow. Second operand 9 states and 210 transitions. [2024-05-12 12:51:05,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 313 transitions, 3836 flow [2024-05-12 12:51:06,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 313 transitions, 3686 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:06,574 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 2930 flow [2024-05-12 12:51:06,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2930, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-05-12 12:51:06,574 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 131 predicate places. [2024-05-12 12:51:06,575 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 2930 flow [2024-05-12 12:51:06,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:06,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:06,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:06,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:51:06,575 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:06,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2006654020, now seen corresponding path program 1 times [2024-05-12 12:51:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:06,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281969914] [2024-05-12 12:51:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:07,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:07,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281969914] [2024-05-12 12:51:07,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281969914] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:07,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:07,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427783062] [2024-05-12 12:51:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:07,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:07,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:07,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:07,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 2930 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:07,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:07,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:07,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:09,422 INFO L124 PetriNetUnfolderBase]: 8955/13791 cut-off events. [2024-05-12 12:51:09,422 INFO L125 PetriNetUnfolderBase]: For 333286/333286 co-relation queries the response was YES. [2024-05-12 12:51:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79879 conditions, 13791 events. 8955/13791 cut-off events. For 333286/333286 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86346 event pairs, 3397 based on Foata normal form. 3/13418 useless extension candidates. Maximal degree in co-relation 79793. Up to 12532 conditions per place. [2024-05-12 12:51:09,559 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 257 selfloop transitions, 24 changer transitions 0/288 dead transitions. [2024-05-12 12:51:09,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 288 transitions, 3761 flow [2024-05-12 12:51:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 12:51:09,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-05-12 12:51:09,561 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 2930 flow. Second operand 6 states and 134 transitions. [2024-05-12 12:51:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 288 transitions, 3761 flow [2024-05-12 12:51:10,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 288 transitions, 3568 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:10,052 INFO L231 Difference]: Finished difference. Result has 188 places, 265 transitions, 2995 flow [2024-05-12 12:51:10,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2995, PETRI_PLACES=188, PETRI_TRANSITIONS=265} [2024-05-12 12:51:10,053 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-05-12 12:51:10,053 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 265 transitions, 2995 flow [2024-05-12 12:51:10,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:10,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:10,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:10,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:51:10,053 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:10,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1894508440, now seen corresponding path program 1 times [2024-05-12 12:51:10,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:10,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087001300] [2024-05-12 12:51:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087001300] [2024-05-12 12:51:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087001300] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:10,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:10,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693544972] [2024-05-12 12:51:10,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:10,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:10,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 265 transitions, 2995 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:10,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:10,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:10,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:13,132 INFO L124 PetriNetUnfolderBase]: 9131/14025 cut-off events. [2024-05-12 12:51:13,132 INFO L125 PetriNetUnfolderBase]: For 358901/358907 co-relation queries the response was YES. [2024-05-12 12:51:13,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83045 conditions, 14025 events. 9131/14025 cut-off events. For 358901/358907 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 87570 event pairs, 3284 based on Foata normal form. 8/13654 useless extension candidates. Maximal degree in co-relation 82957. Up to 12416 conditions per place. [2024-05-12 12:51:13,285 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 264 selfloop transitions, 43 changer transitions 0/314 dead transitions. [2024-05-12 12:51:13,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 314 transitions, 4174 flow [2024-05-12 12:51:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-05-12 12:51:13,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-05-12 12:51:13,287 INFO L175 Difference]: Start difference. First operand has 188 places, 265 transitions, 2995 flow. Second operand 7 states and 160 transitions. [2024-05-12 12:51:13,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 314 transitions, 4174 flow [2024-05-12 12:51:13,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 314 transitions, 4012 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:13,813 INFO L231 Difference]: Finished difference. Result has 193 places, 278 transitions, 3269 flow [2024-05-12 12:51:13,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3269, PETRI_PLACES=193, PETRI_TRANSITIONS=278} [2024-05-12 12:51:13,813 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-05-12 12:51:13,813 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 278 transitions, 3269 flow [2024-05-12 12:51:13,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:13,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:13,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:51:13,814 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:13,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1686635770, now seen corresponding path program 2 times [2024-05-12 12:51:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396850029] [2024-05-12 12:51:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:14,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396850029] [2024-05-12 12:51:14,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396850029] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:14,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:14,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:14,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340914789] [2024-05-12 12:51:14,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:14,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:14,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:14,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 278 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:14,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:14,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:14,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:17,185 INFO L124 PetriNetUnfolderBase]: 9308/14130 cut-off events. [2024-05-12 12:51:17,186 INFO L125 PetriNetUnfolderBase]: For 391571/391574 co-relation queries the response was YES. [2024-05-12 12:51:17,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87492 conditions, 14130 events. 9308/14130 cut-off events. For 391571/391574 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 87607 event pairs, 3490 based on Foata normal form. 6/13806 useless extension candidates. Maximal degree in co-relation 87402. Up to 12865 conditions per place. [2024-05-12 12:51:17,331 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 286 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-05-12 12:51:17,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 336 transitions, 4624 flow [2024-05-12 12:51:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-05-12 12:51:17,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-05-12 12:51:17,333 INFO L175 Difference]: Start difference. First operand has 193 places, 278 transitions, 3269 flow. Second operand 8 states and 182 transitions. [2024-05-12 12:51:17,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 336 transitions, 4624 flow [2024-05-12 12:51:17,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 336 transitions, 4342 flow, removed 123 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:17,920 INFO L231 Difference]: Finished difference. Result has 199 places, 297 transitions, 3562 flow [2024-05-12 12:51:17,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3562, PETRI_PLACES=199, PETRI_TRANSITIONS=297} [2024-05-12 12:51:17,921 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 143 predicate places. [2024-05-12 12:51:17,921 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 297 transitions, 3562 flow [2024-05-12 12:51:17,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:17,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:17,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:17,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:51:17,922 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:17,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1692571318, now seen corresponding path program 1 times [2024-05-12 12:51:17,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:17,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325024190] [2024-05-12 12:51:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:17,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325024190] [2024-05-12 12:51:19,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325024190] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:19,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:19,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:51:19,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843524872] [2024-05-12 12:51:19,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:19,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:51:19,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:51:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:51:19,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:51:19,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 297 transitions, 3562 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:19,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:51:19,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:21,683 INFO L124 PetriNetUnfolderBase]: 8877/13884 cut-off events. [2024-05-12 12:51:21,683 INFO L125 PetriNetUnfolderBase]: For 416694/416786 co-relation queries the response was YES. [2024-05-12 12:51:21,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86547 conditions, 13884 events. 8877/13884 cut-off events. For 416694/416786 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 89867 event pairs, 2778 based on Foata normal form. 19/13436 useless extension candidates. Maximal degree in co-relation 86454. Up to 11907 conditions per place. [2024-05-12 12:51:21,850 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 248 selfloop transitions, 65 changer transitions 0/337 dead transitions. [2024-05-12 12:51:21,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 337 transitions, 4470 flow [2024-05-12 12:51:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 12:51:21,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 12:51:21,851 INFO L175 Difference]: Start difference. First operand has 199 places, 297 transitions, 3562 flow. Second operand 7 states and 168 transitions. [2024-05-12 12:51:21,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 337 transitions, 4470 flow [2024-05-12 12:51:22,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 337 transitions, 4312 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:22,585 INFO L231 Difference]: Finished difference. Result has 202 places, 301 transitions, 3620 flow [2024-05-12 12:51:22,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3620, PETRI_PLACES=202, PETRI_TRANSITIONS=301} [2024-05-12 12:51:22,586 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-05-12 12:51:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 301 transitions, 3620 flow [2024-05-12 12:51:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:22,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:22,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:51:22,587 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1224752860, now seen corresponding path program 1 times [2024-05-12 12:51:22,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721780988] [2024-05-12 12:51:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:23,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:23,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721780988] [2024-05-12 12:51:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721780988] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:23,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:23,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:23,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739173031] [2024-05-12 12:51:23,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:23,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:23,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:23,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 301 transitions, 3620 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:23,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:23,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:23,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:25,655 INFO L124 PetriNetUnfolderBase]: 9477/14483 cut-off events. [2024-05-12 12:51:25,656 INFO L125 PetriNetUnfolderBase]: For 441212/441218 co-relation queries the response was YES. [2024-05-12 12:51:25,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92832 conditions, 14483 events. 9477/14483 cut-off events. For 441212/441218 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 90275 event pairs, 3388 based on Foata normal form. 6/14116 useless extension candidates. Maximal degree in co-relation 92737. Up to 13049 conditions per place. [2024-05-12 12:51:25,825 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 289 selfloop transitions, 52 changer transitions 0/348 dead transitions. [2024-05-12 12:51:25,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 348 transitions, 4612 flow [2024-05-12 12:51:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-05-12 12:51:25,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2024-05-12 12:51:25,831 INFO L175 Difference]: Start difference. First operand has 202 places, 301 transitions, 3620 flow. Second operand 7 states and 162 transitions. [2024-05-12 12:51:25,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 348 transitions, 4612 flow [2024-05-12 12:51:26,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 348 transitions, 4466 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:26,569 INFO L231 Difference]: Finished difference. Result has 206 places, 316 transitions, 3817 flow [2024-05-12 12:51:26,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3817, PETRI_PLACES=206, PETRI_TRANSITIONS=316} [2024-05-12 12:51:26,569 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 150 predicate places. [2024-05-12 12:51:26,569 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 316 transitions, 3817 flow [2024-05-12 12:51:26,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:26,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:26,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:26,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:51:26,570 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:26,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:26,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1641290612, now seen corresponding path program 2 times [2024-05-12 12:51:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:26,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756813163] [2024-05-12 12:51:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:27,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756813163] [2024-05-12 12:51:27,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756813163] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:27,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:27,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108094581] [2024-05-12 12:51:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:27,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:27,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 316 transitions, 3817 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:27,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:27,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:27,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:29,792 INFO L124 PetriNetUnfolderBase]: 9609/14699 cut-off events. [2024-05-12 12:51:29,793 INFO L125 PetriNetUnfolderBase]: For 467203/467209 co-relation queries the response was YES. [2024-05-12 12:51:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97702 conditions, 14699 events. 9609/14699 cut-off events. For 467203/467209 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 91919 event pairs, 3385 based on Foata normal form. 6/14319 useless extension candidates. Maximal degree in co-relation 97604. Up to 13080 conditions per place. [2024-05-12 12:51:29,975 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 292 selfloop transitions, 65 changer transitions 0/364 dead transitions. [2024-05-12 12:51:29,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 364 transitions, 5090 flow [2024-05-12 12:51:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 12:51:29,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657142857142857 [2024-05-12 12:51:29,977 INFO L175 Difference]: Start difference. First operand has 206 places, 316 transitions, 3817 flow. Second operand 7 states and 163 transitions. [2024-05-12 12:51:29,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 364 transitions, 5090 flow [2024-05-12 12:51:30,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 364 transitions, 4982 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:30,699 INFO L231 Difference]: Finished difference. Result has 212 places, 331 transitions, 4199 flow [2024-05-12 12:51:30,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3709, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4199, PETRI_PLACES=212, PETRI_TRANSITIONS=331} [2024-05-12 12:51:30,700 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2024-05-12 12:51:30,700 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 331 transitions, 4199 flow [2024-05-12 12:51:30,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:30,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:30,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:30,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:51:30,701 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:30,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:30,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1532016726, now seen corresponding path program 3 times [2024-05-12 12:51:30,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:30,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467035399] [2024-05-12 12:51:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:30,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:31,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:31,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467035399] [2024-05-12 12:51:31,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467035399] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:31,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:31,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:31,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995806199] [2024-05-12 12:51:31,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:31,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:31,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:31,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:31,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:31,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:31,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 331 transitions, 4199 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:31,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:31,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:34,008 INFO L124 PetriNetUnfolderBase]: 9597/14673 cut-off events. [2024-05-12 12:51:34,009 INFO L125 PetriNetUnfolderBase]: For 489744/489750 co-relation queries the response was YES. [2024-05-12 12:51:34,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99411 conditions, 14673 events. 9597/14673 cut-off events. For 489744/489750 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 91587 event pairs, 3333 based on Foata normal form. 6/14294 useless extension candidates. Maximal degree in co-relation 99310. Up to 13204 conditions per place. [2024-05-12 12:51:34,172 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 311 selfloop transitions, 45 changer transitions 0/363 dead transitions. [2024-05-12 12:51:34,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 363 transitions, 5081 flow [2024-05-12 12:51:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 12:51:34,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542857142857143 [2024-05-12 12:51:34,174 INFO L175 Difference]: Start difference. First operand has 212 places, 331 transitions, 4199 flow. Second operand 7 states and 159 transitions. [2024-05-12 12:51:34,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 363 transitions, 5081 flow [2024-05-12 12:51:35,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 363 transitions, 4834 flow, removed 92 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:35,122 INFO L231 Difference]: Finished difference. Result has 216 places, 331 transitions, 4061 flow [2024-05-12 12:51:35,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=216, PETRI_TRANSITIONS=331} [2024-05-12 12:51:35,123 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-05-12 12:51:35,123 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 331 transitions, 4061 flow [2024-05-12 12:51:35,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:35,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:35,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:35,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 12:51:35,124 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:35,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1399765916, now seen corresponding path program 4 times [2024-05-12 12:51:35,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:35,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386309550] [2024-05-12 12:51:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:35,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386309550] [2024-05-12 12:51:35,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386309550] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:35,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:35,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:35,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816129436] [2024-05-12 12:51:35,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:35,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:35,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:35,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:35,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 331 transitions, 4061 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:35,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:35,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:35,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:38,736 INFO L124 PetriNetUnfolderBase]: 9700/14776 cut-off events. [2024-05-12 12:51:38,736 INFO L125 PetriNetUnfolderBase]: For 500216/500219 co-relation queries the response was YES. [2024-05-12 12:51:38,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99313 conditions, 14776 events. 9700/14776 cut-off events. For 500216/500219 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 91765 event pairs, 3353 based on Foata normal form. 10/14413 useless extension candidates. Maximal degree in co-relation 99210. Up to 12954 conditions per place. [2024-05-12 12:51:38,948 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 302 selfloop transitions, 66 changer transitions 0/375 dead transitions. [2024-05-12 12:51:38,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 375 transitions, 5303 flow [2024-05-12 12:51:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-05-12 12:51:38,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-05-12 12:51:38,950 INFO L175 Difference]: Start difference. First operand has 216 places, 331 transitions, 4061 flow. Second operand 7 states and 161 transitions. [2024-05-12 12:51:38,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 375 transitions, 5303 flow [2024-05-12 12:51:39,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 375 transitions, 5209 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:39,773 INFO L231 Difference]: Finished difference. Result has 219 places, 342 transitions, 4405 flow [2024-05-12 12:51:39,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4405, PETRI_PLACES=219, PETRI_TRANSITIONS=342} [2024-05-12 12:51:39,773 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-05-12 12:51:39,774 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 342 transitions, 4405 flow [2024-05-12 12:51:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:39,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:39,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:39,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 12:51:39,774 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:39,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:39,775 INFO L85 PathProgramCache]: Analyzing trace with hash -755312676, now seen corresponding path program 5 times [2024-05-12 12:51:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872930476] [2024-05-12 12:51:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:40,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:40,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872930476] [2024-05-12 12:51:40,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872930476] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:40,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:40,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148756807] [2024-05-12 12:51:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:40,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:40,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 342 transitions, 4405 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:40,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:40,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:40,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:44,073 INFO L124 PetriNetUnfolderBase]: 9820/14833 cut-off events. [2024-05-12 12:51:44,073 INFO L125 PetriNetUnfolderBase]: For 534245/534251 co-relation queries the response was YES. [2024-05-12 12:51:44,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103121 conditions, 14833 events. 9820/14833 cut-off events. For 534245/534251 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 91709 event pairs, 3042 based on Foata normal form. 10/14504 useless extension candidates. Maximal degree in co-relation 103017. Up to 12570 conditions per place. [2024-05-12 12:51:44,202 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 301 selfloop transitions, 97 changer transitions 0/405 dead transitions. [2024-05-12 12:51:44,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 405 transitions, 6064 flow [2024-05-12 12:51:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 12:51:44,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657142857142857 [2024-05-12 12:51:44,203 INFO L175 Difference]: Start difference. First operand has 219 places, 342 transitions, 4405 flow. Second operand 7 states and 163 transitions. [2024-05-12 12:51:44,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 405 transitions, 6064 flow [2024-05-12 12:51:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 405 transitions, 5806 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:45,095 INFO L231 Difference]: Finished difference. Result has 224 places, 369 transitions, 4944 flow [2024-05-12 12:51:45,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4944, PETRI_PLACES=224, PETRI_TRANSITIONS=369} [2024-05-12 12:51:45,096 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-05-12 12:51:45,096 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 369 transitions, 4944 flow [2024-05-12 12:51:45,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:45,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:45,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:45,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 12:51:45,096 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -761978916, now seen corresponding path program 6 times [2024-05-12 12:51:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82094978] [2024-05-12 12:51:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:46,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:46,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82094978] [2024-05-12 12:51:46,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82094978] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:46,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924179587] [2024-05-12 12:51:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:46,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:51:46,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 369 transitions, 4944 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:46,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:46,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:51:46,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:49,541 INFO L124 PetriNetUnfolderBase]: 9910/14950 cut-off events. [2024-05-12 12:51:49,541 INFO L125 PetriNetUnfolderBase]: For 569931/569937 co-relation queries the response was YES. [2024-05-12 12:51:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107000 conditions, 14950 events. 9910/14950 cut-off events. For 569931/569937 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 92275 event pairs, 3075 based on Foata normal form. 10/14622 useless extension candidates. Maximal degree in co-relation 106893. Up to 12633 conditions per place. [2024-05-12 12:51:49,690 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 296 selfloop transitions, 107 changer transitions 0/410 dead transitions. [2024-05-12 12:51:49,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 410 transitions, 6237 flow [2024-05-12 12:51:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-05-12 12:51:49,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2024-05-12 12:51:49,692 INFO L175 Difference]: Start difference. First operand has 224 places, 369 transitions, 4944 flow. Second operand 7 states and 162 transitions. [2024-05-12 12:51:49,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 410 transitions, 6237 flow [2024-05-12 12:51:50,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 410 transitions, 5976 flow, removed 115 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:50,794 INFO L231 Difference]: Finished difference. Result has 230 places, 376 transitions, 5127 flow [2024-05-12 12:51:50,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5127, PETRI_PLACES=230, PETRI_TRANSITIONS=376} [2024-05-12 12:51:50,795 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 174 predicate places. [2024-05-12 12:51:50,795 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 376 transitions, 5127 flow [2024-05-12 12:51:50,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:50,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:50,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 12:51:50,796 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:50,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -746314306, now seen corresponding path program 1 times [2024-05-12 12:51:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:50,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498021370] [2024-05-12 12:51:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:52,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:52,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498021370] [2024-05-12 12:51:52,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498021370] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:52,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:52,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:51:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485147763] [2024-05-12 12:51:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:51:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:51:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:51:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:51:52,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 376 transitions, 5127 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:52,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:52,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:51:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:55,553 INFO L124 PetriNetUnfolderBase]: 9672/14770 cut-off events. [2024-05-12 12:51:55,553 INFO L125 PetriNetUnfolderBase]: For 561575/561625 co-relation queries the response was YES. [2024-05-12 12:51:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105232 conditions, 14770 events. 9672/14770 cut-off events. For 561575/561625 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 93046 event pairs, 2741 based on Foata normal form. 18/14404 useless extension candidates. Maximal degree in co-relation 105122. Up to 12405 conditions per place. [2024-05-12 12:51:55,708 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 312 selfloop transitions, 104 changer transitions 0/451 dead transitions. [2024-05-12 12:51:55,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 451 transitions, 6883 flow [2024-05-12 12:51:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:51:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:51:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-05-12 12:51:55,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-05-12 12:51:55,709 INFO L175 Difference]: Start difference. First operand has 230 places, 376 transitions, 5127 flow. Second operand 9 states and 218 transitions. [2024-05-12 12:51:55,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 451 transitions, 6883 flow [2024-05-12 12:51:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 451 transitions, 6666 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:56,909 INFO L231 Difference]: Finished difference. Result has 238 places, 396 transitions, 5633 flow [2024-05-12 12:51:56,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=238, PETRI_TRANSITIONS=396} [2024-05-12 12:51:56,910 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 182 predicate places. [2024-05-12 12:51:56,910 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 396 transitions, 5633 flow [2024-05-12 12:51:56,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:56,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:56,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:56,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 12:51:56,910 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:51:56,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash -930119816, now seen corresponding path program 2 times [2024-05-12 12:51:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:56,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090308824] [2024-05-12 12:51:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:56,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:58,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:58,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090308824] [2024-05-12 12:51:58,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090308824] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:58,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:58,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:51:58,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797453413] [2024-05-12 12:51:58,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:51:58,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:51:58,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:51:58,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2024-05-12 12:51:58,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 396 transitions, 5633 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:58,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:58,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2024-05-12 12:51:58,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:01,838 INFO L124 PetriNetUnfolderBase]: 9796/14995 cut-off events. [2024-05-12 12:52:01,839 INFO L125 PetriNetUnfolderBase]: For 602753/602803 co-relation queries the response was YES. [2024-05-12 12:52:01,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110050 conditions, 14995 events. 9796/14995 cut-off events. For 602753/602803 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 95181 event pairs, 2768 based on Foata normal form. 26/14630 useless extension candidates. Maximal degree in co-relation 109937. Up to 12842 conditions per place. [2024-05-12 12:52:02,036 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 332 selfloop transitions, 91 changer transitions 0/458 dead transitions. [2024-05-12 12:52:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 458 transitions, 7086 flow [2024-05-12 12:52:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:52:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:52:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-05-12 12:52:02,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-05-12 12:52:02,038 INFO L175 Difference]: Start difference. First operand has 238 places, 396 transitions, 5633 flow. Second operand 9 states and 214 transitions. [2024-05-12 12:52:02,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 458 transitions, 7086 flow [2024-05-12 12:52:03,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 458 transitions, 6733 flow, removed 141 selfloop flow, removed 3 redundant places. [2024-05-12 12:52:03,236 INFO L231 Difference]: Finished difference. Result has 245 places, 408 transitions, 5738 flow [2024-05-12 12:52:03,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5738, PETRI_PLACES=245, PETRI_TRANSITIONS=408} [2024-05-12 12:52:03,237 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 189 predicate places. [2024-05-12 12:52:03,237 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 408 transitions, 5738 flow [2024-05-12 12:52:03,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:03,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:03,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:03,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 12:52:03,237 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:52:03,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1399782780, now seen corresponding path program 1 times [2024-05-12 12:52:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062008334] [2024-05-12 12:52:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:04,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062008334] [2024-05-12 12:52:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062008334] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:04,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:04,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:52:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088437260] [2024-05-12 12:52:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:04,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:52:04,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:52:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:52:04,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:52:04,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 408 transitions, 5738 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:04,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:04,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:52:04,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:08,037 INFO L124 PetriNetUnfolderBase]: 10481/15883 cut-off events. [2024-05-12 12:52:08,037 INFO L125 PetriNetUnfolderBase]: For 626546/626549 co-relation queries the response was YES. [2024-05-12 12:52:08,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116508 conditions, 15883 events. 10481/15883 cut-off events. For 626546/626549 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 99206 event pairs, 3473 based on Foata normal form. 8/15503 useless extension candidates. Maximal degree in co-relation 116392. Up to 13806 conditions per place. [2024-05-12 12:52:08,240 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 382 selfloop transitions, 78 changer transitions 0/467 dead transitions. [2024-05-12 12:52:08,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 467 transitions, 7380 flow [2024-05-12 12:52:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-05-12 12:52:08,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-05-12 12:52:08,242 INFO L175 Difference]: Start difference. First operand has 245 places, 408 transitions, 5738 flow. Second operand 8 states and 186 transitions. [2024-05-12 12:52:08,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 467 transitions, 7380 flow [2024-05-12 12:52:09,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 467 transitions, 7173 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:09,472 INFO L231 Difference]: Finished difference. Result has 250 places, 421 transitions, 6099 flow [2024-05-12 12:52:09,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6099, PETRI_PLACES=250, PETRI_TRANSITIONS=421} [2024-05-12 12:52:09,473 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 194 predicate places. [2024-05-12 12:52:09,473 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 421 transitions, 6099 flow [2024-05-12 12:52:09,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:09,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:09,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:09,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 12:52:09,473 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:52:09,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash -755295812, now seen corresponding path program 2 times [2024-05-12 12:52:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:09,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571588514] [2024-05-12 12:52:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:10,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571588514] [2024-05-12 12:52:10,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571588514] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:10,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:10,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 12:52:10,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379178383] [2024-05-12 12:52:10,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:10,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 12:52:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 12:52:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 12:52:10,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-05-12 12:52:10,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 421 transitions, 6099 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:10,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:10,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-05-12 12:52:10,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand