./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix015.oepc.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/mix015.oepc.i ./goblint.2024-05-07_14-17-48.files/protection/mix015.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:09:20,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:09:20,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:09:20,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:09:20,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:09:20,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:09:20,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:09:20,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:09:20,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:09:20,285 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:09:20,285 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:09:20,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:09:20,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:09:20,286 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:09:20,287 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:09:20,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:09:20,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:09:20,287 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:09:20,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:09:20,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:09:20,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:09:20,288 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:09:20,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:09:20,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:09:20,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:09:20,289 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:09:20,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:09:20,290 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:09:20,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:09:20,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:09:20,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:09:20,291 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:09:20,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:09:20,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:09:20,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:09:20,292 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:09:20,292 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:09:20,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:09:20,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:09:20,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:09:20,293 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:09:20,293 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:09:20,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:09:20,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:09:20,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:09:20,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:09:20,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:09:20,540 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:09:20,540 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:09:20,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-05-12 13:09:21,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:09:21,923 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:09:21,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-05-12 13:09:21,937 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02daba735/e2e16bf9c4a94b0d95a7c5c44bcacdc0/FLAGbb7abc87f [2024-05-12 13:09:21,951 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02daba735/e2e16bf9c4a94b0d95a7c5c44bcacdc0 [2024-05-12 13:09:21,953 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:09:21,953 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:09:21,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix015.oepc.yml/witness.yml [2024-05-12 13:09:22,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:09:22,093 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:09:22,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:09:22,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:09:22,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:09:22,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:21" (1/2) ... [2024-05-12 13:09:22,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ed2aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:22, skipping insertion in model container [2024-05-12 13:09:22,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:09:21" (1/2) ... [2024-05-12 13:09:22,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@268c4700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:09:22, skipping insertion in model container [2024-05-12 13:09:22,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:22" (2/2) ... [2024-05-12 13:09:22,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ed2aaf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:22, skipping insertion in model container [2024-05-12 13:09:22,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:22" (2/2) ... [2024-05-12 13:09:22,104 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:09:22,172 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:09:22,173 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:22,173 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:22,173 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-05-12 13:09:22,173 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:09:22,174 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-05-12 13:09:22,215 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:09:22,377 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/mix015.oepc.i[945,958] [2024-05-12 13:09:22,568 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:09:22,576 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:09:22,606 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/mix015.oepc.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:09:22,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:09:22,720 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:09:22,721 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:09:22 WrapperNode [2024-05-12 13:09:22,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:09:22,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:09:22,722 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:09:22,722 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:09:22,728 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,741 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,767 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2024-05-12 13:09:22,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:09:22,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:09:22,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:09:22,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:09:22,776 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,776 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,780 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,805 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 13:09:22,805 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,805 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,813 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,814 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,816 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,817 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:09:22,822 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:09:22,822 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:09:22,822 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:09:22,823 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 01:09:22" (1/1) ... [2024-05-12 13:09:22,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:09:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:09:22,857 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 13:09:22,872 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 13:09:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:09:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:09:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:09:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:09:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:09:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:09:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:09:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:09:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:09:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:09:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:09:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:09:22,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:09:22,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:09:22,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:09:22,901 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 13:09:22,997 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:09:22,999 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:09:23,277 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:09:23,278 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:09:23,365 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:09:23,365 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:09:23,366 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:09:23 BoogieIcfgContainer [2024-05-12 13:09:23,366 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:09:23,367 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:09:23,367 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:09:23,369 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:09:23,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:09:21" (1/4) ... [2024-05-12 13:09:23,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306ea09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:09:23, skipping insertion in model container [2024-05-12 13:09:23,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:09:22" (2/4) ... [2024-05-12 13:09:23,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306ea09a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:09:23, skipping insertion in model container [2024-05-12 13:09:23,371 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 01:09:22" (3/4) ... [2024-05-12 13:09:23,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306ea09a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:09:23, skipping insertion in model container [2024-05-12 13:09:23,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:09:23" (4/4) ... [2024-05-12 13:09:23,372 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.oepc.i [2024-05-12 13:09:23,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:09:23,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:09:23,384 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:09:23,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:09:23,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:09:23,503 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:09:23,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:09:23,505 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 5. Compared 80 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 13:09:23,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:09:23,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:09:23,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:09:23,518 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;@7eea795a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:09:23,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:09:23,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:09:23,521 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:09:23,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:09:23,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:23,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:09:23,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:23,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1899590662, now seen corresponding path program 1 times [2024-05-12 13:09:23,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:23,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496073482] [2024-05-12 13:09:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496073482] [2024-05-12 13:09:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496073482] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:24,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:24,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:09:24,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500988848] [2024-05-12 13:09:24,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:24,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:09:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:09:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:09:24,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:09:24,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 13:09:24,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:24,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:09:24,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:25,343 INFO L124 PetriNetUnfolderBase]: 3699/6170 cut-off events. [2024-05-12 13:09:25,344 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-05-12 13:09:25,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11598 conditions, 6170 events. 3699/6170 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 41212 event pairs, 2881 based on Foata normal form. 176/5849 useless extension candidates. Maximal degree in co-relation 11583. Up to 5323 conditions per place. [2024-05-12 13:09:25,370 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 43 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:09:25,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 233 flow [2024-05-12 13:09:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:09:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:09:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-05-12 13:09:25,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-05-12 13:09:25,380 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 101 transitions. [2024-05-12 13:09:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 233 flow [2024-05-12 13:09:25,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:25,384 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:09:25,386 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 13:09:25,388 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:09:25,388 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:09:25,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 13:09:25,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:25,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:09:25,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:09:25,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:25,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1899589621, now seen corresponding path program 1 times [2024-05-12 13:09:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822139057] [2024-05-12 13:09:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:25,431 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 13:09:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:25,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822139057] [2024-05-12 13:09:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822139057] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:25,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:09:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848159270] [2024-05-12 13:09:25,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:25,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:09:25,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:25,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:09:25,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:09:25,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2024-05-12 13:09:25,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:25,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:25,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2024-05-12 13:09:25,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:25,716 INFO L124 PetriNetUnfolderBase]: 996/1962 cut-off events. [2024-05-12 13:09:25,717 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-05-12 13:09:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1962 events. 996/1962 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13378 event pairs, 655 based on Foata normal form. 0/1833 useless extension candidates. Maximal degree in co-relation 3713. Up to 1277 conditions per place. [2024-05-12 13:09:25,726 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 37 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-05-12 13:09:25,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 242 flow [2024-05-12 13:09:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:09:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:09:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-05-12 13:09:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2024-05-12 13:09:25,731 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 3 states and 115 transitions. [2024-05-12 13:09:25,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 242 flow [2024-05-12 13:09:25,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:09:25,735 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 128 flow [2024-05-12 13:09:25,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-05-12 13:09:25,740 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:09:25,740 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 128 flow [2024-05-12 13:09:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:25,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:25,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:25,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:09:25,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:25,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash -145497288, now seen corresponding path program 1 times [2024-05-12 13:09:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:25,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138072739] [2024-05-12 13:09:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138072739] [2024-05-12 13:09:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138072739] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:26,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:09:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776947680] [2024-05-12 13:09:26,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:26,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:09:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:09:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:09:26,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:09:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 13:09:26,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:26,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:09:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:27,082 INFO L124 PetriNetUnfolderBase]: 3141/5235 cut-off events. [2024-05-12 13:09:27,083 INFO L125 PetriNetUnfolderBase]: For 1218/1218 co-relation queries the response was YES. [2024-05-12 13:09:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 5235 events. 3141/5235 cut-off events. For 1218/1218 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 33635 event pairs, 2322 based on Foata normal form. 3/5046 useless extension candidates. Maximal degree in co-relation 11002. Up to 4514 conditions per place. [2024-05-12 13:09:27,106 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 8 changer transitions 2/74 dead transitions. [2024-05-12 13:09:27,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 322 flow [2024-05-12 13:09:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:09:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:09:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-05-12 13:09:27,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 13:09:27,108 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 128 flow. Second operand 4 states and 125 transitions. [2024-05-12 13:09:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 322 flow [2024-05-12 13:09:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:09:27,111 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 189 flow [2024-05-12 13:09:27,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-05-12 13:09:27,111 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:09:27,111 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 189 flow [2024-05-12 13:09:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 13:09:27,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:27,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:09:27,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:27,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:27,113 INFO L85 PathProgramCache]: Analyzing trace with hash -215447663, now seen corresponding path program 1 times [2024-05-12 13:09:27,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298739506] [2024-05-12 13:09:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:27,931 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 13:09:27,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:27,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298739506] [2024-05-12 13:09:27,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298739506] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:27,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:27,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:09:27,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246134247] [2024-05-12 13:09:27,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:27,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:09:27,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:09:27,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:09:28,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:09:28,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:28,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:28,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:09:28,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:28,474 INFO L124 PetriNetUnfolderBase]: 3177/5402 cut-off events. [2024-05-12 13:09:28,475 INFO L125 PetriNetUnfolderBase]: For 2269/2269 co-relation queries the response was YES. [2024-05-12 13:09:28,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12231 conditions, 5402 events. 3177/5402 cut-off events. For 2269/2269 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 35121 event pairs, 2153 based on Foata normal form. 3/5227 useless extension candidates. Maximal degree in co-relation 12213. Up to 4552 conditions per place. [2024-05-12 13:09:28,499 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 62 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-05-12 13:09:28,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 421 flow [2024-05-12 13:09:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:09:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:09:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 13:09:28,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2024-05-12 13:09:28,501 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 189 flow. Second operand 5 states and 148 transitions. [2024-05-12 13:09:28,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 421 flow [2024-05-12 13:09:28,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 410 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 13:09:28,503 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 230 flow [2024-05-12 13:09:28,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-05-12 13:09:28,504 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-05-12 13:09:28,504 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 230 flow [2024-05-12 13:09:28,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:28,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:28,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:28,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:09:28,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:28,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1911058039, now seen corresponding path program 1 times [2024-05-12 13:09:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:28,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312883909] [2024-05-12 13:09:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312883909] [2024-05-12 13:09:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312883909] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:29,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:09:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50451016] [2024-05-12 13:09:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:09:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:09:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:09:29,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:09:29,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 13:09:29,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:29,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:09:29,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:29,878 INFO L124 PetriNetUnfolderBase]: 3176/5314 cut-off events. [2024-05-12 13:09:29,881 INFO L125 PetriNetUnfolderBase]: For 4157/4157 co-relation queries the response was YES. [2024-05-12 13:09:29,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13066 conditions, 5314 events. 3176/5314 cut-off events. For 4157/4157 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34197 event pairs, 1552 based on Foata normal form. 3/5139 useless extension candidates. Maximal degree in co-relation 13046. Up to 4529 conditions per place. [2024-05-12 13:09:29,907 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 72 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-05-12 13:09:29,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 98 transitions, 518 flow [2024-05-12 13:09:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 13:09:29,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-05-12 13:09:29,911 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 230 flow. Second operand 6 states and 176 transitions. [2024-05-12 13:09:29,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 98 transitions, 518 flow [2024-05-12 13:09:29,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 492 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:29,916 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 266 flow [2024-05-12 13:09:29,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-05-12 13:09:29,918 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:09:29,918 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 266 flow [2024-05-12 13:09:29,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 13:09:29,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:29,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:29,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:09:29,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:29,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1325268140, now seen corresponding path program 1 times [2024-05-12 13:09:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317503046] [2024-05-12 13:09:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:29,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:30,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:30,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317503046] [2024-05-12 13:09:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317503046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:30,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:09:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137386426] [2024-05-12 13:09:30,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:30,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:09:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:09:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:09:30,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:30,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:30,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:30,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:30,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:31,606 INFO L124 PetriNetUnfolderBase]: 4059/6973 cut-off events. [2024-05-12 13:09:31,606 INFO L125 PetriNetUnfolderBase]: For 8115/8119 co-relation queries the response was YES. [2024-05-12 13:09:31,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17625 conditions, 6973 events. 4059/6973 cut-off events. For 8115/8119 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 47220 event pairs, 2245 based on Foata normal form. 8/6779 useless extension candidates. Maximal degree in co-relation 17604. Up to 5822 conditions per place. [2024-05-12 13:09:31,637 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 59 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-05-12 13:09:31,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 468 flow [2024-05-12 13:09:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:09:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:09:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-05-12 13:09:31,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524 [2024-05-12 13:09:31,639 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 266 flow. Second operand 5 states and 131 transitions. [2024-05-12 13:09:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 468 flow [2024-05-12 13:09:31,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 432 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:31,643 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 283 flow [2024-05-12 13:09:31,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-05-12 13:09:31,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-05-12 13:09:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 283 flow [2024-05-12 13:09:31,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:31,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:31,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:31,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:09:31,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:31,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1719194186, now seen corresponding path program 1 times [2024-05-12 13:09:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139030975] [2024-05-12 13:09:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:33,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139030975] [2024-05-12 13:09:33,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139030975] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:33,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:33,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:33,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132083179] [2024-05-12 13:09:33,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:33,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:33,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:33,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:33,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:33,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 13:09:33,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:33,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:33,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:33,915 INFO L124 PetriNetUnfolderBase]: 3648/6122 cut-off events. [2024-05-12 13:09:33,915 INFO L125 PetriNetUnfolderBase]: For 9465/9465 co-relation queries the response was YES. [2024-05-12 13:09:33,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16757 conditions, 6122 events. 3648/6122 cut-off events. For 9465/9465 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39766 event pairs, 1442 based on Foata normal form. 3/5925 useless extension candidates. Maximal degree in co-relation 16734. Up to 5157 conditions per place. [2024-05-12 13:09:33,940 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 96 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-05-12 13:09:33,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 127 transitions, 699 flow [2024-05-12 13:09:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-05-12 13:09:33,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 13:09:33,942 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 283 flow. Second operand 8 states and 225 transitions. [2024-05-12 13:09:33,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 127 transitions, 699 flow [2024-05-12 13:09:33,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 127 transitions, 672 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:33,946 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 352 flow [2024-05-12 13:09:33,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-05-12 13:09:33,947 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2024-05-12 13:09:33,947 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 352 flow [2024-05-12 13:09:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 13:09:33,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:33,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:09:33,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:33,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1204132616, now seen corresponding path program 1 times [2024-05-12 13:09:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691185423] [2024-05-12 13:09:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:34,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691185423] [2024-05-12 13:09:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691185423] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:34,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:34,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:09:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664940649] [2024-05-12 13:09:34,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:09:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:09:34,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:09:35,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:35,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 13:09:35,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:35,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:35,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:35,775 INFO L124 PetriNetUnfolderBase]: 4143/6940 cut-off events. [2024-05-12 13:09:35,775 INFO L125 PetriNetUnfolderBase]: For 14778/14781 co-relation queries the response was YES. [2024-05-12 13:09:35,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20209 conditions, 6940 events. 4143/6940 cut-off events. For 14778/14781 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 45437 event pairs, 1501 based on Foata normal form. 7/6742 useless extension candidates. Maximal degree in co-relation 20185. Up to 5860 conditions per place. [2024-05-12 13:09:35,810 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 81 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-05-12 13:09:35,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 710 flow [2024-05-12 13:09:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 13:09:35,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-05-12 13:09:35,813 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 352 flow. Second operand 6 states and 163 transitions. [2024-05-12 13:09:35,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 710 flow [2024-05-12 13:09:35,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 111 transitions, 658 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:35,823 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 424 flow [2024-05-12 13:09:35,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-05-12 13:09:35,826 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-05-12 13:09:35,826 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 424 flow [2024-05-12 13:09:35,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 13:09:35,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:35,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:35,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:09:35,827 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:35,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:35,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2058370146, now seen corresponding path program 2 times [2024-05-12 13:09:35,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:35,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275432764] [2024-05-12 13:09:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:35,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:36,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:36,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275432764] [2024-05-12 13:09:36,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275432764] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:36,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:36,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:09:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201181778] [2024-05-12 13:09:36,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:36,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:09:36,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:09:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:09:36,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:36,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 13:09:36,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:36,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:36,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:37,723 INFO L124 PetriNetUnfolderBase]: 4127/7061 cut-off events. [2024-05-12 13:09:37,748 INFO L125 PetriNetUnfolderBase]: For 19572/19578 co-relation queries the response was YES. [2024-05-12 13:09:37,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 7061 events. 4127/7061 cut-off events. For 19572/19578 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 47779 event pairs, 1743 based on Foata normal form. 10/6866 useless extension candidates. Maximal degree in co-relation 21943. Up to 5907 conditions per place. [2024-05-12 13:09:37,798 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 78 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-05-12 13:09:37,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 668 flow [2024-05-12 13:09:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:09:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:09:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-05-12 13:09:37,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:09:37,800 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 424 flow. Second operand 6 states and 154 transitions. [2024-05-12 13:09:37,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 668 flow [2024-05-12 13:09:37,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 638 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-05-12 13:09:37,811 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 428 flow [2024-05-12 13:09:37,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=428, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-05-12 13:09:37,812 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-05-12 13:09:37,812 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 428 flow [2024-05-12 13:09:37,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 13:09:37,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:37,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:37,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:09:37,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:37,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1755411121, now seen corresponding path program 1 times [2024-05-12 13:09:37,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:37,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136422808] [2024-05-12 13:09:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:37,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136422808] [2024-05-12 13:09:39,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136422808] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:39,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638908033] [2024-05-12 13:09:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:39,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:39,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:39,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 428 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 13:09:39,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:39,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:39,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:40,228 INFO L124 PetriNetUnfolderBase]: 3707/6292 cut-off events. [2024-05-12 13:09:40,229 INFO L125 PetriNetUnfolderBase]: For 19812/19812 co-relation queries the response was YES. [2024-05-12 13:09:40,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20088 conditions, 6292 events. 3707/6292 cut-off events. For 19812/19812 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 41672 event pairs, 1535 based on Foata normal form. 6/6096 useless extension candidates. Maximal degree in co-relation 20058. Up to 5196 conditions per place. [2024-05-12 13:09:40,263 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 113 selfloop transitions, 22 changer transitions 0/146 dead transitions. [2024-05-12 13:09:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 146 transitions, 896 flow [2024-05-12 13:09:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:09:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:09:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-05-12 13:09:40,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-05-12 13:09:40,265 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 428 flow. Second operand 9 states and 248 transitions. [2024-05-12 13:09:40,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 146 transitions, 896 flow [2024-05-12 13:09:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 857 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:40,275 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 460 flow [2024-05-12 13:09:40,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2024-05-12 13:09:40,276 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-05-12 13:09:40,276 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 460 flow [2024-05-12 13:09:40,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 13:09:40,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:40,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:09:40,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:40,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1326415687, now seen corresponding path program 1 times [2024-05-12 13:09:40,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928670817] [2024-05-12 13:09:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:41,247 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 13:09:41,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928670817] [2024-05-12 13:09:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928670817] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320182699] [2024-05-12 13:09:41,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:41,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:41,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:41,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 460 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:41,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:41,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:41,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:42,145 INFO L124 PetriNetUnfolderBase]: 4397/7067 cut-off events. [2024-05-12 13:09:42,146 INFO L125 PetriNetUnfolderBase]: For 26602/26602 co-relation queries the response was YES. [2024-05-12 13:09:42,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23859 conditions, 7067 events. 4397/7067 cut-off events. For 26602/26602 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44459 event pairs, 1385 based on Foata normal form. 4/6905 useless extension candidates. Maximal degree in co-relation 23830. Up to 6080 conditions per place. [2024-05-12 13:09:42,178 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 94 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-05-12 13:09:42,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 912 flow [2024-05-12 13:09:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 13:09:42,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-05-12 13:09:42,180 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 460 flow. Second operand 7 states and 186 transitions. [2024-05-12 13:09:42,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 912 flow [2024-05-12 13:09:42,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 847 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:42,191 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 517 flow [2024-05-12 13:09:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-05-12 13:09:42,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-05-12 13:09:42,192 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 517 flow [2024-05-12 13:09:42,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:42,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:42,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:42,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:09:42,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:42,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:42,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1124402527, now seen corresponding path program 2 times [2024-05-12 13:09:42,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:42,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634846846] [2024-05-12 13:09:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:42,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:43,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634846846] [2024-05-12 13:09:43,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634846846] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133449883] [2024-05-12 13:09:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:43,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:43,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:43,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:43,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:43,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:44,182 INFO L124 PetriNetUnfolderBase]: 4443/7137 cut-off events. [2024-05-12 13:09:44,183 INFO L125 PetriNetUnfolderBase]: For 32364/32364 co-relation queries the response was YES. [2024-05-12 13:09:44,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25159 conditions, 7137 events. 4443/7137 cut-off events. For 32364/32364 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 44857 event pairs, 1398 based on Foata normal form. 4/6974 useless extension candidates. Maximal degree in co-relation 25128. Up to 6119 conditions per place. [2024-05-12 13:09:44,221 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 92 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-05-12 13:09:44,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 943 flow [2024-05-12 13:09:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:09:44,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-05-12 13:09:44,222 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 517 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:09:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 943 flow [2024-05-12 13:09:44,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 893 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:44,246 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 565 flow [2024-05-12 13:09:44,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=565, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-05-12 13:09:44,246 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-05-12 13:09:44,247 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 565 flow [2024-05-12 13:09:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:44,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:44,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:44,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:09:44,247 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:44,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1845616599, now seen corresponding path program 3 times [2024-05-12 13:09:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:44,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537140148] [2024-05-12 13:09:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:45,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:45,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537140148] [2024-05-12 13:09:45,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537140148] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:45,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598381686] [2024-05-12 13:09:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 565 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:45,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:45,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:45,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:46,108 INFO L124 PetriNetUnfolderBase]: 4433/7248 cut-off events. [2024-05-12 13:09:46,109 INFO L125 PetriNetUnfolderBase]: For 34993/34993 co-relation queries the response was YES. [2024-05-12 13:09:46,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25541 conditions, 7248 events. 4433/7248 cut-off events. For 34993/34993 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 46940 event pairs, 1681 based on Foata normal form. 4/7081 useless extension candidates. Maximal degree in co-relation 25508. Up to 6266 conditions per place. [2024-05-12 13:09:46,177 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 96 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-05-12 13:09:46,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 877 flow [2024-05-12 13:09:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:09:46,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-05-12 13:09:46,179 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 565 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:09:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 877 flow [2024-05-12 13:09:46,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 805 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:46,212 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 533 flow [2024-05-12 13:09:46,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=533, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-05-12 13:09:46,213 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-05-12 13:09:46,213 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 533 flow [2024-05-12 13:09:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:46,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:46,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:09:46,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:46,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:46,214 INFO L85 PathProgramCache]: Analyzing trace with hash -859290186, now seen corresponding path program 1 times [2024-05-12 13:09:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:46,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192334646] [2024-05-12 13:09:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:46,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:47,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:47,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192334646] [2024-05-12 13:09:47,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192334646] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:47,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:47,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:47,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705475008] [2024-05-12 13:09:47,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:47,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:47,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:47,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:47,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:47,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:47,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:47,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:47,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:48,634 INFO L124 PetriNetUnfolderBase]: 5160/8435 cut-off events. [2024-05-12 13:09:48,634 INFO L125 PetriNetUnfolderBase]: For 42603/42609 co-relation queries the response was YES. [2024-05-12 13:09:48,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28886 conditions, 8435 events. 5160/8435 cut-off events. For 42603/42609 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 55243 event pairs, 2056 based on Foata normal form. 10/8238 useless extension candidates. Maximal degree in co-relation 28852. Up to 7280 conditions per place. [2024-05-12 13:09:48,678 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 98 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-05-12 13:09:48,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 928 flow [2024-05-12 13:09:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-05-12 13:09:48,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-05-12 13:09:48,681 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 533 flow. Second operand 7 states and 174 transitions. [2024-05-12 13:09:48,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 928 flow [2024-05-12 13:09:48,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 865 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:48,702 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 593 flow [2024-05-12 13:09:48,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=593, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-05-12 13:09:48,703 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-05-12 13:09:48,703 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 593 flow [2024-05-12 13:09:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:09:48,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:48,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:48,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:09:48,704 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:48,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1215701927, now seen corresponding path program 1 times [2024-05-12 13:09:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531306971] [2024-05-12 13:09:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:49,397 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 13:09:49,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:49,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531306971] [2024-05-12 13:09:49,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531306971] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:49,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:49,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:09:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848640056] [2024-05-12 13:09:49,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:49,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:09:49,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:49,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:09:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:09:49,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:49,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 593 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 13:09:49,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:49,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:49,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:50,436 INFO L124 PetriNetUnfolderBase]: 5673/9278 cut-off events. [2024-05-12 13:09:50,436 INFO L125 PetriNetUnfolderBase]: For 54255/54260 co-relation queries the response was YES. [2024-05-12 13:09:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32940 conditions, 9278 events. 5673/9278 cut-off events. For 54255/54260 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 61593 event pairs, 2498 based on Foata normal form. 6/9041 useless extension candidates. Maximal degree in co-relation 32904. Up to 8169 conditions per place. [2024-05-12 13:09:50,491 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 88 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-05-12 13:09:50,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 853 flow [2024-05-12 13:09:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:09:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:09:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-05-12 13:09:50,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484 [2024-05-12 13:09:50,492 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 593 flow. Second operand 5 states and 121 transitions. [2024-05-12 13:09:50,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 853 flow [2024-05-12 13:09:50,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 114 transitions, 796 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:50,523 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 595 flow [2024-05-12 13:09:50,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=595, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-05-12 13:09:50,523 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-05-12 13:09:50,524 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 595 flow [2024-05-12 13:09:50,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 13:09:50,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:50,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:09:50,524 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:50,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash -502453249, now seen corresponding path program 1 times [2024-05-12 13:09:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919612357] [2024-05-12 13:09:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:51,636 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 13:09:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919612357] [2024-05-12 13:09:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919612357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733675376] [2024-05-12 13:09:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:51,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:51,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:51,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 595 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:51,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:51,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:51,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:52,992 INFO L124 PetriNetUnfolderBase]: 5499/8736 cut-off events. [2024-05-12 13:09:52,992 INFO L125 PetriNetUnfolderBase]: For 60037/60041 co-relation queries the response was YES. [2024-05-12 13:09:53,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33135 conditions, 8736 events. 5499/8736 cut-off events. For 60037/60041 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 55995 event pairs, 1544 based on Foata normal form. 4/8500 useless extension candidates. Maximal degree in co-relation 33098. Up to 7339 conditions per place. [2024-05-12 13:09:53,041 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 110 selfloop transitions, 39 changer transitions 0/161 dead transitions. [2024-05-12 13:09:53,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 161 transitions, 1169 flow [2024-05-12 13:09:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 13:09:53,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-05-12 13:09:53,043 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 595 flow. Second operand 8 states and 215 transitions. [2024-05-12 13:09:53,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 161 transitions, 1169 flow [2024-05-12 13:09:53,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 161 transitions, 1134 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:53,102 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 720 flow [2024-05-12 13:09:53,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-05-12 13:09:53,103 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-05-12 13:09:53,103 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 720 flow [2024-05-12 13:09:53,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:53,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:53,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:09:53,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:53,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1830786023, now seen corresponding path program 2 times [2024-05-12 13:09:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:53,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185625300] [2024-05-12 13:09:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:54,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:54,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185625300] [2024-05-12 13:09:54,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185625300] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:54,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:54,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756122126] [2024-05-12 13:09:54,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:54,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:54,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:54,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:54,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:54,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:54,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:55,547 INFO L124 PetriNetUnfolderBase]: 5545/8777 cut-off events. [2024-05-12 13:09:55,548 INFO L125 PetriNetUnfolderBase]: For 68884/68888 co-relation queries the response was YES. [2024-05-12 13:09:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35024 conditions, 8777 events. 5545/8777 cut-off events. For 68884/68888 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 55931 event pairs, 1542 based on Foata normal form. 4/8549 useless extension candidates. Maximal degree in co-relation 34986. Up to 7378 conditions per place. [2024-05-12 13:09:55,605 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 109 selfloop transitions, 40 changer transitions 0/161 dead transitions. [2024-05-12 13:09:55,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 161 transitions, 1262 flow [2024-05-12 13:09:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 13:09:55,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-05-12 13:09:55,629 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 720 flow. Second operand 8 states and 213 transitions. [2024-05-12 13:09:55,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 161 transitions, 1262 flow [2024-05-12 13:09:55,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 161 transitions, 1179 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 13:09:55,667 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 765 flow [2024-05-12 13:09:55,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=765, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-05-12 13:09:55,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-05-12 13:09:55,668 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 765 flow [2024-05-12 13:09:55,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:55,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:55,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:55,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:09:55,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:55,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -496739329, now seen corresponding path program 3 times [2024-05-12 13:09:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:55,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48290051] [2024-05-12 13:09:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48290051] [2024-05-12 13:09:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48290051] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:56,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376210730] [2024-05-12 13:09:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:56,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:56,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:56,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:56,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 765 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:56,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:56,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:57,961 INFO L124 PetriNetUnfolderBase]: 5580/8856 cut-off events. [2024-05-12 13:09:57,961 INFO L125 PetriNetUnfolderBase]: For 74109/74113 co-relation queries the response was YES. [2024-05-12 13:09:57,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35563 conditions, 8856 events. 5580/8856 cut-off events. For 74109/74113 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 56712 event pairs, 1583 based on Foata normal form. 4/8622 useless extension candidates. Maximal degree in co-relation 35523. Up to 7417 conditions per place. [2024-05-12 13:09:58,029 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 107 selfloop transitions, 42 changer transitions 0/161 dead transitions. [2024-05-12 13:09:58,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 161 transitions, 1301 flow [2024-05-12 13:09:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:09:58,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:09:58,031 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 765 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:09:58,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 161 transitions, 1301 flow [2024-05-12 13:09:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 161 transitions, 1217 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 13:09:58,105 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 811 flow [2024-05-12 13:09:58,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=811, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-05-12 13:09:58,106 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-05-12 13:09:58,106 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 811 flow [2024-05-12 13:09:58,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:58,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:58,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:09:58,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:58,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1875739935, now seen corresponding path program 1 times [2024-05-12 13:09:58,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:58,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777104254] [2024-05-12 13:09:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:59,081 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 13:09:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777104254] [2024-05-12 13:09:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777104254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:59,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:59,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:59,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88808029] [2024-05-12 13:09:59,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:59,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:59,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:59,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:59,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 811 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:09:59,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:59,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:59,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:00,251 INFO L124 PetriNetUnfolderBase]: 5638/8897 cut-off events. [2024-05-12 13:10:00,251 INFO L125 PetriNetUnfolderBase]: For 84003/84029 co-relation queries the response was YES. [2024-05-12 13:10:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36499 conditions, 8897 events. 5638/8897 cut-off events. For 84003/84029 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 56610 event pairs, 2149 based on Foata normal form. 10/8675 useless extension candidates. Maximal degree in co-relation 36458. Up to 7851 conditions per place. [2024-05-12 13:10:00,311 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 115 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-05-12 13:10:00,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 153 transitions, 1267 flow [2024-05-12 13:10:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:10:00,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:10:00,314 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 811 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:10:00,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 153 transitions, 1267 flow [2024-05-12 13:10:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 153 transitions, 1180 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:00,395 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 921 flow [2024-05-12 13:10:00,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=921, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-05-12 13:10:00,395 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-05-12 13:10:00,395 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 921 flow [2024-05-12 13:10:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:10:00,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:00,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:10:00,397 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:00,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1881436463, now seen corresponding path program 4 times [2024-05-12 13:10:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255781450] [2024-05-12 13:10:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:01,373 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 13:10:01,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:01,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255781450] [2024-05-12 13:10:01,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255781450] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:01,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:01,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419230288] [2024-05-12 13:10:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:01,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 921 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:10:01,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:01,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:02,642 INFO L124 PetriNetUnfolderBase]: 5629/8878 cut-off events. [2024-05-12 13:10:02,643 INFO L125 PetriNetUnfolderBase]: For 88857/88857 co-relation queries the response was YES. [2024-05-12 13:10:02,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37178 conditions, 8878 events. 5629/8878 cut-off events. For 88857/88857 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 57005 event pairs, 1925 based on Foata normal form. 6/8702 useless extension candidates. Maximal degree in co-relation 37134. Up to 7736 conditions per place. [2024-05-12 13:10:02,711 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 127 selfloop transitions, 25 changer transitions 0/165 dead transitions. [2024-05-12 13:10:02,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 165 transitions, 1345 flow [2024-05-12 13:10:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:10:02,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-05-12 13:10:02,712 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 921 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:10:02,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 165 transitions, 1345 flow [2024-05-12 13:10:02,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 165 transitions, 1282 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:02,785 INFO L231 Difference]: Finished difference. Result has 112 places, 123 transitions, 916 flow [2024-05-12 13:10:02,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=112, PETRI_TRANSITIONS=123} [2024-05-12 13:10:02,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-05-12 13:10:02,786 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 123 transitions, 916 flow [2024-05-12 13:10:02,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 13:10:02,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:02,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:02,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:10:02,786 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:02,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 967946910, now seen corresponding path program 1 times [2024-05-12 13:10:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984772312] [2024-05-12 13:10:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984772312] [2024-05-12 13:10:03,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984772312] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:03,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:03,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425079646] [2024-05-12 13:10:03,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:03,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:03,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:03,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 123 transitions, 916 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:03,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:03,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:04,983 INFO L124 PetriNetUnfolderBase]: 5833/9043 cut-off events. [2024-05-12 13:10:04,983 INFO L125 PetriNetUnfolderBase]: For 96366/96390 co-relation queries the response was YES. [2024-05-12 13:10:05,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38435 conditions, 9043 events. 5833/9043 cut-off events. For 96366/96390 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55727 event pairs, 2430 based on Foata normal form. 9/8906 useless extension candidates. Maximal degree in co-relation 38390. Up to 8280 conditions per place. [2024-05-12 13:10:05,042 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 114 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-05-12 13:10:05,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 149 transitions, 1276 flow [2024-05-12 13:10:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-05-12 13:10:05,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2024-05-12 13:10:05,043 INFO L175 Difference]: Start difference. First operand has 112 places, 123 transitions, 916 flow. Second operand 7 states and 158 transitions. [2024-05-12 13:10:05,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 149 transitions, 1276 flow [2024-05-12 13:10:05,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1165 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-05-12 13:10:05,092 INFO L231 Difference]: Finished difference. Result has 110 places, 128 transitions, 896 flow [2024-05-12 13:10:05,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=896, PETRI_PLACES=110, PETRI_TRANSITIONS=128} [2024-05-12 13:10:05,093 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-05-12 13:10:05,093 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 128 transitions, 896 flow [2024-05-12 13:10:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:05,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:05,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:10:05,093 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:05,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1603699166, now seen corresponding path program 1 times [2024-05-12 13:10:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951513145] [2024-05-12 13:10:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:05,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:06,173 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 13:10:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951513145] [2024-05-12 13:10:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951513145] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:06,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672065389] [2024-05-12 13:10:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:06,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:06,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 128 transitions, 896 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:06,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:06,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:06,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:07,711 INFO L124 PetriNetUnfolderBase]: 5694/8879 cut-off events. [2024-05-12 13:10:07,712 INFO L125 PetriNetUnfolderBase]: For 101210/101216 co-relation queries the response was YES. [2024-05-12 13:10:07,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38798 conditions, 8879 events. 5694/8879 cut-off events. For 101210/101216 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 55744 event pairs, 1693 based on Foata normal form. 8/8717 useless extension candidates. Maximal degree in co-relation 38752. Up to 7929 conditions per place. [2024-05-12 13:10:07,773 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 157 selfloop transitions, 22 changer transitions 0/192 dead transitions. [2024-05-12 13:10:07,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 192 transitions, 1480 flow [2024-05-12 13:10:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:10:07,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-05-12 13:10:07,775 INFO L175 Difference]: Start difference. First operand has 110 places, 128 transitions, 896 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:10:07,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 192 transitions, 1480 flow [2024-05-12 13:10:07,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 192 transitions, 1432 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:07,817 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 948 flow [2024-05-12 13:10:07,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-05-12 13:10:07,818 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-05-12 13:10:07,818 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 948 flow [2024-05-12 13:10:07,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:07,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:07,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:07,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:10:07,818 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:07,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:07,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1608287786, now seen corresponding path program 2 times [2024-05-12 13:10:07,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:07,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985918710] [2024-05-12 13:10:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:07,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:08,952 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 13:10:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985918710] [2024-05-12 13:10:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985918710] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813920583] [2024-05-12 13:10:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:09,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:09,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 948 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:09,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:09,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:10,269 INFO L124 PetriNetUnfolderBase]: 5774/8953 cut-off events. [2024-05-12 13:10:10,270 INFO L125 PetriNetUnfolderBase]: For 113120/113124 co-relation queries the response was YES. [2024-05-12 13:10:10,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40628 conditions, 8953 events. 5774/8953 cut-off events. For 113120/113124 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 55846 event pairs, 1403 based on Foata normal form. 8/8802 useless extension candidates. Maximal degree in co-relation 40581. Up to 7427 conditions per place. [2024-05-12 13:10:10,340 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 130 selfloop transitions, 58 changer transitions 0/201 dead transitions. [2024-05-12 13:10:10,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 201 transitions, 1694 flow [2024-05-12 13:10:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 13:10:10,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-05-12 13:10:10,342 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 948 flow. Second operand 9 states and 242 transitions. [2024-05-12 13:10:10,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 201 transitions, 1694 flow [2024-05-12 13:10:10,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 201 transitions, 1618 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-05-12 13:10:10,413 INFO L231 Difference]: Finished difference. Result has 117 places, 137 transitions, 1098 flow [2024-05-12 13:10:10,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1098, PETRI_PLACES=117, PETRI_TRANSITIONS=137} [2024-05-12 13:10:10,414 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-05-12 13:10:10,414 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 137 transitions, 1098 flow [2024-05-12 13:10:10,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:10,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:10,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:10,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:10:10,414 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:10,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -919791194, now seen corresponding path program 3 times [2024-05-12 13:10:10,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:10,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403035411] [2024-05-12 13:10:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:11,561 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 13:10:11,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:11,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403035411] [2024-05-12 13:10:11,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403035411] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:11,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:11,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973949029] [2024-05-12 13:10:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:11,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:11,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:11,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 137 transitions, 1098 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:11,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:11,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:12,805 INFO L124 PetriNetUnfolderBase]: 5820/8994 cut-off events. [2024-05-12 13:10:12,805 INFO L125 PetriNetUnfolderBase]: For 126573/126577 co-relation queries the response was YES. [2024-05-12 13:10:12,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42489 conditions, 8994 events. 5820/8994 cut-off events. For 126573/126577 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55867 event pairs, 1411 based on Foata normal form. 8/8851 useless extension candidates. Maximal degree in co-relation 42441. Up to 7466 conditions per place. [2024-05-12 13:10:12,873 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 129 selfloop transitions, 59 changer transitions 0/201 dead transitions. [2024-05-12 13:10:12,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 1796 flow [2024-05-12 13:10:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:10:12,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:10:12,875 INFO L175 Difference]: Start difference. First operand has 117 places, 137 transitions, 1098 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:10:12,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 1796 flow [2024-05-12 13:10:12,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 1686 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:12,996 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1168 flow [2024-05-12 13:10:12,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1168, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-05-12 13:10:12,996 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-05-12 13:10:12,996 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1168 flow [2024-05-12 13:10:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:12,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:12,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:12,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:10:12,997 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:12,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash -747055040, now seen corresponding path program 1 times [2024-05-12 13:10:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:12,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679979944] [2024-05-12 13:10:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:14,144 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 13:10:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679979944] [2024-05-12 13:10:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679979944] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:14,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181485796] [2024-05-12 13:10:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:14,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:14,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1168 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 13:10:14,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:14,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:14,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:15,489 INFO L124 PetriNetUnfolderBase]: 5887/9175 cut-off events. [2024-05-12 13:10:15,490 INFO L125 PetriNetUnfolderBase]: For 138620/138634 co-relation queries the response was YES. [2024-05-12 13:10:15,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44144 conditions, 9175 events. 5887/9175 cut-off events. For 138620/138634 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 57083 event pairs, 1793 based on Foata normal form. 11/8999 useless extension candidates. Maximal degree in co-relation 44094. Up to 8064 conditions per place. [2024-05-12 13:10:15,548 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 147 selfloop transitions, 30 changer transitions 0/192 dead transitions. [2024-05-12 13:10:15,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 1723 flow [2024-05-12 13:10:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:10:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:10:15,550 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1168 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:10:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 1723 flow [2024-05-12 13:10:15,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 1594 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:15,657 INFO L231 Difference]: Finished difference. Result has 124 places, 145 transitions, 1177 flow [2024-05-12 13:10:15,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1177, PETRI_PLACES=124, PETRI_TRANSITIONS=145} [2024-05-12 13:10:15,658 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-05-12 13:10:15,658 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 145 transitions, 1177 flow [2024-05-12 13:10:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 13:10:15,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:15,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:15,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:10:15,658 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:15,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -747301304, now seen corresponding path program 4 times [2024-05-12 13:10:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038346655] [2024-05-12 13:10:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:16,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038346655] [2024-05-12 13:10:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038346655] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:16,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:16,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273572040] [2024-05-12 13:10:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:16,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:16,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:16,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:16,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:16,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 145 transitions, 1177 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:18,076 INFO L124 PetriNetUnfolderBase]: 5943/9228 cut-off events. [2024-05-12 13:10:18,077 INFO L125 PetriNetUnfolderBase]: For 145387/145391 co-relation queries the response was YES. [2024-05-12 13:10:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44620 conditions, 9228 events. 5943/9228 cut-off events. For 145387/145391 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 57789 event pairs, 1496 based on Foata normal form. 10/9075 useless extension candidates. Maximal degree in co-relation 44568. Up to 7565 conditions per place. [2024-05-12 13:10:18,146 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 130 selfloop transitions, 62 changer transitions 0/206 dead transitions. [2024-05-12 13:10:18,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 1876 flow [2024-05-12 13:10:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:10:18,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:10:18,148 INFO L175 Difference]: Start difference. First operand has 124 places, 145 transitions, 1177 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:10:18,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 1876 flow [2024-05-12 13:10:18,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 206 transitions, 1785 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:18,272 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1267 flow [2024-05-12 13:10:18,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1267, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-05-12 13:10:18,273 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-05-12 13:10:18,273 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1267 flow [2024-05-12 13:10:18,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:18,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:18,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:18,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:10:18,273 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:18,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1651908631, now seen corresponding path program 1 times [2024-05-12 13:10:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:18,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546310274] [2024-05-12 13:10:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546310274] [2024-05-12 13:10:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546310274] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:19,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865731704] [2024-05-12 13:10:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:19,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:19,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:19,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:19,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:19,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1267 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:19,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:19,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:20,405 INFO L124 PetriNetUnfolderBase]: 6107/9393 cut-off events. [2024-05-12 13:10:20,406 INFO L125 PetriNetUnfolderBase]: For 160065/160138 co-relation queries the response was YES. [2024-05-12 13:10:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46550 conditions, 9393 events. 6107/9393 cut-off events. For 160065/160138 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 57687 event pairs, 2069 based on Foata normal form. 10/9137 useless extension candidates. Maximal degree in co-relation 46497. Up to 8615 conditions per place. [2024-05-12 13:10:20,487 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 145 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-05-12 13:10:20,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 183 transitions, 1803 flow [2024-05-12 13:10:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-05-12 13:10:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:10:20,489 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1267 flow. Second operand 6 states and 150 transitions. [2024-05-12 13:10:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 183 transitions, 1803 flow [2024-05-12 13:10:20,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 183 transitions, 1673 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:20,620 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1290 flow [2024-05-12 13:10:20,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1290, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-05-12 13:10:20,620 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-05-12 13:10:20,620 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1290 flow [2024-05-12 13:10:20,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:20,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:20,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:20,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:10:20,621 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:20,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:20,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1805258726, now seen corresponding path program 2 times [2024-05-12 13:10:20,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:20,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110089177] [2024-05-12 13:10:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:20,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:21,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:21,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110089177] [2024-05-12 13:10:21,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110089177] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:21,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:21,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:10:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272674899] [2024-05-12 13:10:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:10:21,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:10:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:10:21,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:21,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 13:10:21,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:21,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:23,221 INFO L124 PetriNetUnfolderBase]: 6074/9515 cut-off events. [2024-05-12 13:10:23,221 INFO L125 PetriNetUnfolderBase]: For 172416/172470 co-relation queries the response was YES. [2024-05-12 13:10:23,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47575 conditions, 9515 events. 6074/9515 cut-off events. For 172416/172470 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 60046 event pairs, 2149 based on Foata normal form. 8/9301 useless extension candidates. Maximal degree in co-relation 47520. Up to 8385 conditions per place. [2024-05-12 13:10:23,292 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 161 selfloop transitions, 25 changer transitions 0/204 dead transitions. [2024-05-12 13:10:23,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 204 transitions, 1855 flow [2024-05-12 13:10:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:10:23,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-05-12 13:10:23,293 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1290 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:10:23,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 204 transitions, 1855 flow [2024-05-12 13:10:23,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 204 transitions, 1825 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-05-12 13:10:23,420 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1402 flow [2024-05-12 13:10:23,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2024-05-12 13:10:23,420 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 13:10:23,420 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1402 flow [2024-05-12 13:10:23,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 13:10:23,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:23,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:23,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:10:23,421 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:23,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1468581184, now seen corresponding path program 5 times [2024-05-12 13:10:23,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:23,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528510201] [2024-05-12 13:10:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:23,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:24,426 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 13:10:24,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528510201] [2024-05-12 13:10:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528510201] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:24,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572561391] [2024-05-12 13:10:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:24,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:24,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1402 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:24,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:24,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:24,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:25,786 INFO L124 PetriNetUnfolderBase]: 6049/9462 cut-off events. [2024-05-12 13:10:25,787 INFO L125 PetriNetUnfolderBase]: For 179504/179532 co-relation queries the response was YES. [2024-05-12 13:10:25,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47847 conditions, 9462 events. 6049/9462 cut-off events. For 179504/179532 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60234 event pairs, 1944 based on Foata normal form. 6/9283 useless extension candidates. Maximal degree in co-relation 47788. Up to 8254 conditions per place. [2024-05-12 13:10:25,856 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 164 selfloop transitions, 31 changer transitions 0/213 dead transitions. [2024-05-12 13:10:25,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 213 transitions, 1946 flow [2024-05-12 13:10:25,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:10:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:10:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:10:25,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4955555555555556 [2024-05-12 13:10:25,858 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1402 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:10:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 213 transitions, 1946 flow [2024-05-12 13:10:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 213 transitions, 1825 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:26,030 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1351 flow [2024-05-12 13:10:26,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1351, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2024-05-12 13:10:26,031 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-05-12 13:10:26,031 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1351 flow [2024-05-12 13:10:26,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:26,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:26,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:10:26,031 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:26,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1144131340, now seen corresponding path program 3 times [2024-05-12 13:10:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136717878] [2024-05-12 13:10:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:27,079 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 13:10:27,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:27,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136717878] [2024-05-12 13:10:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136717878] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:27,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249736000] [2024-05-12 13:10:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:27,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:27,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1351 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:27,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:27,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:27,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:28,540 INFO L124 PetriNetUnfolderBase]: 6096/9552 cut-off events. [2024-05-12 13:10:28,541 INFO L125 PetriNetUnfolderBase]: For 193304/193349 co-relation queries the response was YES. [2024-05-12 13:10:28,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49135 conditions, 9552 events. 6096/9552 cut-off events. For 193304/193349 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 60379 event pairs, 2125 based on Foata normal form. 10/9338 useless extension candidates. Maximal degree in co-relation 49075. Up to 8456 conditions per place. [2024-05-12 13:10:28,614 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 163 selfloop transitions, 23 changer transitions 0/204 dead transitions. [2024-05-12 13:10:28,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 204 transitions, 1881 flow [2024-05-12 13:10:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:10:28,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-05-12 13:10:28,616 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1351 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:10:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 204 transitions, 1881 flow [2024-05-12 13:10:28,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 204 transitions, 1739 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 13:10:28,752 INFO L231 Difference]: Finished difference. Result has 140 places, 168 transitions, 1342 flow [2024-05-12 13:10:28,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1342, PETRI_PLACES=140, PETRI_TRANSITIONS=168} [2024-05-12 13:10:28,753 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-05-12 13:10:28,753 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 168 transitions, 1342 flow [2024-05-12 13:10:28,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:28,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:28,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:28,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:10:28,754 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:28,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1144516670, now seen corresponding path program 1 times [2024-05-12 13:10:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:28,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439187179] [2024-05-12 13:10:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:28,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439187179] [2024-05-12 13:10:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439187179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:29,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:29,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:29,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894338384] [2024-05-12 13:10:29,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:29,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:29,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:29,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 168 transitions, 1342 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:10:29,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:29,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:29,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:31,384 INFO L124 PetriNetUnfolderBase]: 6465/10024 cut-off events. [2024-05-12 13:10:31,384 INFO L125 PetriNetUnfolderBase]: For 205168/205184 co-relation queries the response was YES. [2024-05-12 13:10:31,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51883 conditions, 10024 events. 6465/10024 cut-off events. For 205168/205184 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 62329 event pairs, 2209 based on Foata normal form. 2/9845 useless extension candidates. Maximal degree in co-relation 51821. Up to 8966 conditions per place. [2024-05-12 13:10:31,455 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 169 selfloop transitions, 30 changer transitions 0/212 dead transitions. [2024-05-12 13:10:31,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 212 transitions, 1931 flow [2024-05-12 13:10:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:10:31,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-05-12 13:10:31,457 INFO L175 Difference]: Start difference. First operand has 140 places, 168 transitions, 1342 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:10:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 212 transitions, 1931 flow [2024-05-12 13:10:31,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 212 transitions, 1840 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:31,596 INFO L231 Difference]: Finished difference. Result has 143 places, 174 transitions, 1414 flow [2024-05-12 13:10:31,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1414, PETRI_PLACES=143, PETRI_TRANSITIONS=174} [2024-05-12 13:10:31,596 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-05-12 13:10:31,596 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 174 transitions, 1414 flow [2024-05-12 13:10:31,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 13:10:31,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:31,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:10:31,597 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:31,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1199787984, now seen corresponding path program 4 times [2024-05-12 13:10:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:31,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104551912] [2024-05-12 13:10:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:31,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104551912] [2024-05-12 13:10:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104551912] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:32,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:32,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256337790] [2024-05-12 13:10:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:32,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:32,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 174 transitions, 1414 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:32,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:32,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:32,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:34,500 INFO L124 PetriNetUnfolderBase]: 6189/9686 cut-off events. [2024-05-12 13:10:34,501 INFO L125 PetriNetUnfolderBase]: For 221351/221430 co-relation queries the response was YES. [2024-05-12 13:10:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51702 conditions, 9686 events. 6189/9686 cut-off events. For 221351/221430 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 61236 event pairs, 2146 based on Foata normal form. 16/9485 useless extension candidates. Maximal degree in co-relation 51639. Up to 8593 conditions per place. [2024-05-12 13:10:34,581 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 174 selfloop transitions, 20 changer transitions 0/214 dead transitions. [2024-05-12 13:10:34,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 214 transitions, 1966 flow [2024-05-12 13:10:34,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:10:34,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-05-12 13:10:34,582 INFO L175 Difference]: Start difference. First operand has 143 places, 174 transitions, 1414 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:10:34,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 214 transitions, 1966 flow [2024-05-12 13:10:34,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 214 transitions, 1876 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:34,735 INFO L231 Difference]: Finished difference. Result has 145 places, 176 transitions, 1429 flow [2024-05-12 13:10:34,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1429, PETRI_PLACES=145, PETRI_TRANSITIONS=176} [2024-05-12 13:10:34,735 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-05-12 13:10:34,735 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 176 transitions, 1429 flow [2024-05-12 13:10:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:34,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:34,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:34,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:10:34,736 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:34,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1144516360, now seen corresponding path program 5 times [2024-05-12 13:10:34,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:34,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935409785] [2024-05-12 13:10:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:34,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935409785] [2024-05-12 13:10:35,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935409785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:35,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:10:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723128164] [2024-05-12 13:10:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:35,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:10:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:10:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:10:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:35,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 176 transitions, 1429 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:35,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:35,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:35,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:37,462 INFO L124 PetriNetUnfolderBase]: 6189/9678 cut-off events. [2024-05-12 13:10:37,462 INFO L125 PetriNetUnfolderBase]: For 234430/234501 co-relation queries the response was YES. [2024-05-12 13:10:37,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52319 conditions, 9678 events. 6189/9678 cut-off events. For 234430/234501 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 61091 event pairs, 2133 based on Foata normal form. 16/9479 useless extension candidates. Maximal degree in co-relation 52255. Up to 8531 conditions per place. [2024-05-12 13:10:37,540 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 168 selfloop transitions, 28 changer transitions 0/216 dead transitions. [2024-05-12 13:10:37,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 216 transitions, 1989 flow [2024-05-12 13:10:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:10:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:10:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-05-12 13:10:37,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-05-12 13:10:37,541 INFO L175 Difference]: Start difference. First operand has 145 places, 176 transitions, 1429 flow. Second operand 8 states and 196 transitions. [2024-05-12 13:10:37,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 216 transitions, 1989 flow [2024-05-12 13:10:37,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 216 transitions, 1903 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:37,689 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 1471 flow [2024-05-12 13:10:37,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1471, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-05-12 13:10:37,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-05-12 13:10:37,690 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 1471 flow [2024-05-12 13:10:37,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 13:10:37,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:37,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:10:37,690 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:37,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653591, now seen corresponding path program 2 times [2024-05-12 13:10:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:37,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275197390] [2024-05-12 13:10:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:38,471 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 13:10:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275197390] [2024-05-12 13:10:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275197390] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:38,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669002788] [2024-05-12 13:10:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:38,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:38,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 1471 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:38,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:38,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:38,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:39,860 INFO L124 PetriNetUnfolderBase]: 6295/9775 cut-off events. [2024-05-12 13:10:39,860 INFO L125 PetriNetUnfolderBase]: For 245612/245708 co-relation queries the response was YES. [2024-05-12 13:10:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53371 conditions, 9775 events. 6295/9775 cut-off events. For 245612/245708 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 61162 event pairs, 2350 based on Foata normal form. 15/9527 useless extension candidates. Maximal degree in co-relation 53306. Up to 8904 conditions per place. [2024-05-12 13:10:39,944 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 159 selfloop transitions, 14 changer transitions 0/194 dead transitions. [2024-05-12 13:10:39,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 194 transitions, 1863 flow [2024-05-12 13:10:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-05-12 13:10:39,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-05-12 13:10:39,945 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 1471 flow. Second operand 6 states and 140 transitions. [2024-05-12 13:10:39,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 194 transitions, 1863 flow [2024-05-12 13:10:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 194 transitions, 1735 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:40,126 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 1377 flow [2024-05-12 13:10:40,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1377, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-05-12 13:10:40,126 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-05-12 13:10:40,126 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 1377 flow [2024-05-12 13:10:40,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:40,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:40,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:40,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:10:40,127 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:40,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1643358614, now seen corresponding path program 1 times [2024-05-12 13:10:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124096245] [2024-05-12 13:10:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:40,935 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 13:10:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124096245] [2024-05-12 13:10:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124096245] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:40,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:40,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702936580] [2024-05-12 13:10:40,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:40,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:40,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:41,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:41,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 1377 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:41,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:42,485 INFO L124 PetriNetUnfolderBase]: 6724/10343 cut-off events. [2024-05-12 13:10:42,486 INFO L125 PetriNetUnfolderBase]: For 238036/238088 co-relation queries the response was YES. [2024-05-12 13:10:42,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54312 conditions, 10343 events. 6724/10343 cut-off events. For 238036/238088 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 64045 event pairs, 2438 based on Foata normal form. 13/10150 useless extension candidates. Maximal degree in co-relation 54246. Up to 9477 conditions per place. [2024-05-12 13:10:42,595 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 167 selfloop transitions, 25 changer transitions 0/207 dead transitions. [2024-05-12 13:10:42,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 207 transitions, 1949 flow [2024-05-12 13:10:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-05-12 13:10:42,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-05-12 13:10:42,597 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 1377 flow. Second operand 6 states and 143 transitions. [2024-05-12 13:10:42,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 207 transitions, 1949 flow [2024-05-12 13:10:42,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 207 transitions, 1902 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:42,841 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1445 flow [2024-05-12 13:10:42,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1445, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-05-12 13:10:42,842 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-05-12 13:10:42,842 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1445 flow [2024-05-12 13:10:42,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:42,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:42,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:10:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:10:42,843 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:42,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -6587444, now seen corresponding path program 2 times [2024-05-12 13:10:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420688572] [2024-05-12 13:10:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420688572] [2024-05-12 13:10:43,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420688572] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:43,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:43,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:10:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154872351] [2024-05-12 13:10:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:10:43,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:10:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:10:43,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1445 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:43,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:44,987 INFO L124 PetriNetUnfolderBase]: 6719/10332 cut-off events. [2024-05-12 13:10:44,987 INFO L125 PetriNetUnfolderBase]: For 250224/250275 co-relation queries the response was YES. [2024-05-12 13:10:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55558 conditions, 10332 events. 6719/10332 cut-off events. For 250224/250275 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 63991 event pairs, 2439 based on Foata normal form. 15/10143 useless extension candidates. Maximal degree in co-relation 55492. Up to 9471 conditions per place. [2024-05-12 13:10:45,122 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 163 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2024-05-12 13:10:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 203 transitions, 1883 flow [2024-05-12 13:10:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:10:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:10:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-05-12 13:10:45,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-05-12 13:10:45,124 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1445 flow. Second operand 6 states and 139 transitions. [2024-05-12 13:10:45,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 203 transitions, 1883 flow [2024-05-12 13:10:45,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 203 transitions, 1831 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:45,404 INFO L231 Difference]: Finished difference. Result has 153 places, 184 transitions, 1450 flow [2024-05-12 13:10:45,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1450, PETRI_PLACES=153, PETRI_TRANSITIONS=184} [2024-05-12 13:10:45,404 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-05-12 13:10:45,404 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 184 transitions, 1450 flow [2024-05-12 13:10:45,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:10:45,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:45,405 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 13:10:45,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:10:45,405 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:45,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:45,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1545734510, now seen corresponding path program 1 times [2024-05-12 13:10:45,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:45,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430734595] [2024-05-12 13:10:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:46,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430734595] [2024-05-12 13:10:46,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430734595] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:46,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:46,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:46,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447658744] [2024-05-12 13:10:46,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:46,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:46,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:47,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:47,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 184 transitions, 1450 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:47,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:47,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:47,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:48,633 INFO L124 PetriNetUnfolderBase]: 6372/9639 cut-off events. [2024-05-12 13:10:48,633 INFO L125 PetriNetUnfolderBase]: For 255510/255526 co-relation queries the response was YES. [2024-05-12 13:10:48,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53462 conditions, 9639 events. 6372/9639 cut-off events. For 255510/255526 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 58521 event pairs, 1508 based on Foata normal form. 4/9526 useless extension candidates. Maximal degree in co-relation 53394. Up to 8620 conditions per place. [2024-05-12 13:10:48,723 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 220 selfloop transitions, 49 changer transitions 0/291 dead transitions. [2024-05-12 13:10:48,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 291 transitions, 2884 flow [2024-05-12 13:10:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:10:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:10:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-05-12 13:10:48,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-05-12 13:10:48,725 INFO L175 Difference]: Start difference. First operand has 153 places, 184 transitions, 1450 flow. Second operand 11 states and 290 transitions. [2024-05-12 13:10:48,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 291 transitions, 2884 flow [2024-05-12 13:10:48,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 291 transitions, 2814 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:48,960 INFO L231 Difference]: Finished difference. Result has 161 places, 206 transitions, 2016 flow [2024-05-12 13:10:48,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2016, PETRI_PLACES=161, PETRI_TRANSITIONS=206} [2024-05-12 13:10:48,961 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 105 predicate places. [2024-05-12 13:10:48,961 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 206 transitions, 2016 flow [2024-05-12 13:10:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:48,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:48,961 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 13:10:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:10:48,961 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:48,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1403635160, now seen corresponding path program 2 times [2024-05-12 13:10:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282232197] [2024-05-12 13:10:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:50,547 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 13:10:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282232197] [2024-05-12 13:10:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282232197] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266661739] [2024-05-12 13:10:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:50,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:50,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:50,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 206 transitions, 2016 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:50,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:50,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:50,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:52,678 INFO L124 PetriNetUnfolderBase]: 6584/10259 cut-off events. [2024-05-12 13:10:52,678 INFO L125 PetriNetUnfolderBase]: For 283147/283171 co-relation queries the response was YES. [2024-05-12 13:10:52,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58354 conditions, 10259 events. 6584/10259 cut-off events. For 283147/283171 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65086 event pairs, 1857 based on Foata normal form. 4/10029 useless extension candidates. Maximal degree in co-relation 58283. Up to 9030 conditions per place. [2024-05-12 13:10:52,798 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 238 selfloop transitions, 26 changer transitions 0/286 dead transitions. [2024-05-12 13:10:52,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 286 transitions, 2961 flow [2024-05-12 13:10:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:10:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:10:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-05-12 13:10:52,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:10:52,801 INFO L175 Difference]: Start difference. First operand has 161 places, 206 transitions, 2016 flow. Second operand 11 states and 264 transitions. [2024-05-12 13:10:52,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 286 transitions, 2961 flow [2024-05-12 13:10:53,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 286 transitions, 2613 flow, removed 169 selfloop flow, removed 2 redundant places. [2024-05-12 13:10:53,211 INFO L231 Difference]: Finished difference. Result has 175 places, 224 transitions, 1989 flow [2024-05-12 13:10:53,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1989, PETRI_PLACES=175, PETRI_TRANSITIONS=224} [2024-05-12 13:10:53,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-05-12 13:10:53,211 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 224 transitions, 1989 flow [2024-05-12 13:10:53,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:53,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:53,212 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 13:10:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:10:53,212 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:53,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1407354230, now seen corresponding path program 3 times [2024-05-12 13:10:53,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158817642] [2024-05-12 13:10:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:53,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:54,614 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 13:10:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158817642] [2024-05-12 13:10:54,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158817642] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:54,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:54,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:54,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295210458] [2024-05-12 13:10:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:54,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:54,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:54,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:54,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 224 transitions, 1989 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:54,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:54,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:54,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:56,509 INFO L124 PetriNetUnfolderBase]: 6577/10198 cut-off events. [2024-05-12 13:10:56,509 INFO L125 PetriNetUnfolderBase]: For 291098/291134 co-relation queries the response was YES. [2024-05-12 13:10:56,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58540 conditions, 10198 events. 6577/10198 cut-off events. For 291098/291134 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 64439 event pairs, 1479 based on Foata normal form. 12/9983 useless extension candidates. Maximal degree in co-relation 58462. Up to 8141 conditions per place. [2024-05-12 13:10:56,623 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 190 selfloop transitions, 86 changer transitions 0/298 dead transitions. [2024-05-12 13:10:56,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 298 transitions, 2851 flow [2024-05-12 13:10:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:10:56,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:10:56,625 INFO L175 Difference]: Start difference. First operand has 175 places, 224 transitions, 1989 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:10:56,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 298 transitions, 2851 flow [2024-05-12 13:10:56,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 298 transitions, 2782 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 13:10:56,964 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 2174 flow [2024-05-12 13:10:56,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2174, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-05-12 13:10:56,965 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-05-12 13:10:56,965 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 2174 flow [2024-05-12 13:10:56,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:10:56,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:56,965 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 13:10:56,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:10:56,966 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:56,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1551460241, now seen corresponding path program 1 times [2024-05-12 13:10:56,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:56,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927574186] [2024-05-12 13:10:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:56,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:58,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:58,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927574186] [2024-05-12 13:10:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927574186] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:58,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013129400] [2024-05-12 13:10:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:58,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:58,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:10:58,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 2174 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:10:58,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:58,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:10:58,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:00,168 INFO L124 PetriNetUnfolderBase]: 7054/10811 cut-off events. [2024-05-12 13:11:00,168 INFO L125 PetriNetUnfolderBase]: For 327510/327549 co-relation queries the response was YES. [2024-05-12 13:11:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64536 conditions, 10811 events. 7054/10811 cut-off events. For 327510/327549 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 66461 event pairs, 1827 based on Foata normal form. 12/10615 useless extension candidates. Maximal degree in co-relation 64458. Up to 9403 conditions per place. [2024-05-12 13:11:00,269 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 223 selfloop transitions, 53 changer transitions 0/291 dead transitions. [2024-05-12 13:11:00,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 291 transitions, 3008 flow [2024-05-12 13:11:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:11:00,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:11:00,279 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 2174 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:11:00,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 291 transitions, 3008 flow [2024-05-12 13:11:00,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 291 transitions, 2774 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:00,542 INFO L231 Difference]: Finished difference. Result has 183 places, 232 transitions, 2144 flow [2024-05-12 13:11:00,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2144, PETRI_PLACES=183, PETRI_TRANSITIONS=232} [2024-05-12 13:11:00,543 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-05-12 13:11:00,543 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 232 transitions, 2144 flow [2024-05-12 13:11:00,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:00,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:00,543 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 13:11:00,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:11:00,543 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:00,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1677323104, now seen corresponding path program 4 times [2024-05-12 13:11:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126659101] [2024-05-12 13:11:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:01,831 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 13:11:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126659101] [2024-05-12 13:11:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126659101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:01,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:01,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005596852] [2024-05-12 13:11:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:01,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:01,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:01,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:01,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 232 transitions, 2144 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:01,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:01,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:01,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:03,548 INFO L124 PetriNetUnfolderBase]: 6699/10087 cut-off events. [2024-05-12 13:11:03,548 INFO L125 PetriNetUnfolderBase]: For 334655/334683 co-relation queries the response was YES. [2024-05-12 13:11:03,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62112 conditions, 10087 events. 6699/10087 cut-off events. For 334655/334683 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 60923 event pairs, 1216 based on Foata normal form. 14/9998 useless extension candidates. Maximal degree in co-relation 62032. Up to 8067 conditions per place. [2024-05-12 13:11:03,647 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 179 selfloop transitions, 124 changer transitions 0/326 dead transitions. [2024-05-12 13:11:03,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 326 transitions, 3640 flow [2024-05-12 13:11:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-05-12 13:11:03,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534 [2024-05-12 13:11:03,649 INFO L175 Difference]: Start difference. First operand has 183 places, 232 transitions, 2144 flow. Second operand 10 states and 267 transitions. [2024-05-12 13:11:03,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 326 transitions, 3640 flow [2024-05-12 13:11:03,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 3483 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:03,947 INFO L231 Difference]: Finished difference. Result has 190 places, 251 transitions, 2816 flow [2024-05-12 13:11:03,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2816, PETRI_PLACES=190, PETRI_TRANSITIONS=251} [2024-05-12 13:11:03,948 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 134 predicate places. [2024-05-12 13:11:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 251 transitions, 2816 flow [2024-05-12 13:11:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:03,948 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 13:11:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:11:03,948 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -617479019, now seen corresponding path program 2 times [2024-05-12 13:11:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755254892] [2024-05-12 13:11:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:05,132 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 13:11:05,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:05,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755254892] [2024-05-12 13:11:05,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755254892] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:05,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:05,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:05,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523752809] [2024-05-12 13:11:05,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:05,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:05,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:05,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 251 transitions, 2816 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:05,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:05,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:05,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:07,045 INFO L124 PetriNetUnfolderBase]: 7263/11141 cut-off events. [2024-05-12 13:11:07,045 INFO L125 PetriNetUnfolderBase]: For 381830/381860 co-relation queries the response was YES. [2024-05-12 13:11:07,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70708 conditions, 11141 events. 7263/11141 cut-off events. For 381830/381860 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 68800 event pairs, 1865 based on Foata normal form. 6/10944 useless extension candidates. Maximal degree in co-relation 70624. Up to 9675 conditions per place. [2024-05-12 13:11:07,204 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 244 selfloop transitions, 56 changer transitions 0/315 dead transitions. [2024-05-12 13:11:07,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 315 transitions, 3723 flow [2024-05-12 13:11:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 13:11:07,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:11:07,210 INFO L175 Difference]: Start difference. First operand has 190 places, 251 transitions, 2816 flow. Second operand 9 states and 225 transitions. [2024-05-12 13:11:07,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 315 transitions, 3723 flow [2024-05-12 13:11:07,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 315 transitions, 3395 flow, removed 154 selfloop flow, removed 2 redundant places. [2024-05-12 13:11:07,983 INFO L231 Difference]: Finished difference. Result has 198 places, 259 transitions, 2738 flow [2024-05-12 13:11:07,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2738, PETRI_PLACES=198, PETRI_TRANSITIONS=259} [2024-05-12 13:11:07,983 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-05-12 13:11:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 259 transitions, 2738 flow [2024-05-12 13:11:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:07,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:07,984 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 13:11:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:11:07,984 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:07,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1691503242, now seen corresponding path program 5 times [2024-05-12 13:11:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102841778] [2024-05-12 13:11:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:09,337 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 13:11:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102841778] [2024-05-12 13:11:09,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102841778] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:09,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:09,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:09,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888907093] [2024-05-12 13:11:09,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:09,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:09,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:09,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:09,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:09,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 259 transitions, 2738 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:09,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:09,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:09,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:11,111 INFO L124 PetriNetUnfolderBase]: 6899/10438 cut-off events. [2024-05-12 13:11:11,112 INFO L125 PetriNetUnfolderBase]: For 370209/370225 co-relation queries the response was YES. [2024-05-12 13:11:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66709 conditions, 10438 events. 6899/10438 cut-off events. For 370209/370225 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 63707 event pairs, 1304 based on Foata normal form. 6/10326 useless extension candidates. Maximal degree in co-relation 66622. Up to 8271 conditions per place. [2024-05-12 13:11:11,218 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 189 selfloop transitions, 133 changer transitions 0/346 dead transitions. [2024-05-12 13:11:11,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 346 transitions, 4165 flow [2024-05-12 13:11:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:11:11,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:11:11,242 INFO L175 Difference]: Start difference. First operand has 198 places, 259 transitions, 2738 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:11:11,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 346 transitions, 4165 flow [2024-05-12 13:11:11,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 346 transitions, 4020 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:11,766 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 3325 flow [2024-05-12 13:11:11,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3325, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-05-12 13:11:11,767 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-05-12 13:11:11,768 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 3325 flow [2024-05-12 13:11:11,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:11,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:11,768 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 13:11:11,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:11:11,768 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:11,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1551894775, now seen corresponding path program 3 times [2024-05-12 13:11:11,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:11,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372159526] [2024-05-12 13:11:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:11,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372159526] [2024-05-12 13:11:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372159526] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270695087] [2024-05-12 13:11:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:13,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:13,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 3325 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:13,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:13,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:13,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:15,024 INFO L124 PetriNetUnfolderBase]: 7429/11391 cut-off events. [2024-05-12 13:11:15,024 INFO L125 PetriNetUnfolderBase]: For 412538/412568 co-relation queries the response was YES. [2024-05-12 13:11:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74110 conditions, 11391 events. 7429/11391 cut-off events. For 412538/412568 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 70498 event pairs, 1899 based on Foata normal form. 6/11189 useless extension candidates. Maximal degree in co-relation 74019. Up to 9910 conditions per place. [2024-05-12 13:11:15,179 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 263 selfloop transitions, 55 changer transitions 0/333 dead transitions. [2024-05-12 13:11:15,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 333 transitions, 4225 flow [2024-05-12 13:11:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:11:15,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:11:15,180 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 3325 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:11:15,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 333 transitions, 4225 flow [2024-05-12 13:11:15,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 333 transitions, 3838 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:15,837 INFO L231 Difference]: Finished difference. Result has 213 places, 276 transitions, 3127 flow [2024-05-12 13:11:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3127, PETRI_PLACES=213, PETRI_TRANSITIONS=276} [2024-05-12 13:11:15,838 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-05-12 13:11:15,838 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 276 transitions, 3127 flow [2024-05-12 13:11:15,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:15,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:15,838 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 13:11:15,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:11:15,839 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash -617469719, now seen corresponding path program 4 times [2024-05-12 13:11:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:15,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822963527] [2024-05-12 13:11:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:17,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:17,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822963527] [2024-05-12 13:11:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822963527] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:17,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740429765] [2024-05-12 13:11:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:17,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:17,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 276 transitions, 3127 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:17,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:17,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:17,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:19,325 INFO L124 PetriNetUnfolderBase]: 7493/11492 cut-off events. [2024-05-12 13:11:19,325 INFO L125 PetriNetUnfolderBase]: For 429352/429382 co-relation queries the response was YES. [2024-05-12 13:11:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74156 conditions, 11492 events. 7493/11492 cut-off events. For 429352/429382 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 71291 event pairs, 1845 based on Foata normal form. 6/11264 useless extension candidates. Maximal degree in co-relation 74064. Up to 9861 conditions per place. [2024-05-12 13:11:19,476 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 256 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-05-12 13:11:19,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 334 transitions, 4027 flow [2024-05-12 13:11:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 13:11:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:11:19,479 INFO L175 Difference]: Start difference. First operand has 213 places, 276 transitions, 3127 flow. Second operand 9 states and 225 transitions. [2024-05-12 13:11:19,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 334 transitions, 4027 flow [2024-05-12 13:11:20,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 334 transitions, 3832 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-05-12 13:11:20,182 INFO L231 Difference]: Finished difference. Result has 213 places, 278 transitions, 3141 flow [2024-05-12 13:11:20,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3141, PETRI_PLACES=213, PETRI_TRANSITIONS=278} [2024-05-12 13:11:20,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-05-12 13:11:20,182 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 278 transitions, 3141 flow [2024-05-12 13:11:20,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:20,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:20,183 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 13:11:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:11:20,183 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:20,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 330082490, now seen corresponding path program 1 times [2024-05-12 13:11:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341699892] [2024-05-12 13:11:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:21,132 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 13:11:21,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:21,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341699892] [2024-05-12 13:11:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341699892] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:21,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867898945] [2024-05-12 13:11:21,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:21,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:21,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:21,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:21,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 278 transitions, 3141 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:21,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:21,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:22,896 INFO L124 PetriNetUnfolderBase]: 7565/11575 cut-off events. [2024-05-12 13:11:22,897 INFO L125 PetriNetUnfolderBase]: For 443143/443166 co-relation queries the response was YES. [2024-05-12 13:11:22,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74798 conditions, 11575 events. 7565/11575 cut-off events. For 443143/443166 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71781 event pairs, 2167 based on Foata normal form. 18/11346 useless extension candidates. Maximal degree in co-relation 74707. Up to 10580 conditions per place. [2024-05-12 13:11:23,031 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 270 selfloop transitions, 32 changer transitions 0/320 dead transitions. [2024-05-12 13:11:23,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 320 transitions, 4053 flow [2024-05-12 13:11:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:11:23,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:11:23,032 INFO L175 Difference]: Start difference. First operand has 213 places, 278 transitions, 3141 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:11:23,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 320 transitions, 4053 flow [2024-05-12 13:11:23,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 320 transitions, 3862 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:23,515 INFO L231 Difference]: Finished difference. Result has 213 places, 284 transitions, 3131 flow [2024-05-12 13:11:23,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3131, PETRI_PLACES=213, PETRI_TRANSITIONS=284} [2024-05-12 13:11:23,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 157 predicate places. [2024-05-12 13:11:23,515 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 284 transitions, 3131 flow [2024-05-12 13:11:23,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:23,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:23,516 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 13:11:23,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:11:23,516 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:23,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1652214154, now seen corresponding path program 1 times [2024-05-12 13:11:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:23,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171656525] [2024-05-12 13:11:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:23,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171656525] [2024-05-12 13:11:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171656525] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:24,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246931888] [2024-05-12 13:11:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:24,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:24,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 284 transitions, 3131 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:11:24,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:24,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:24,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:26,248 INFO L124 PetriNetUnfolderBase]: 7350/11291 cut-off events. [2024-05-12 13:11:26,248 INFO L125 PetriNetUnfolderBase]: For 454310/454448 co-relation queries the response was YES. [2024-05-12 13:11:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73190 conditions, 11291 events. 7350/11291 cut-off events. For 454310/454448 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 70624 event pairs, 2123 based on Foata normal form. 36/11037 useless extension candidates. Maximal degree in co-relation 73098. Up to 10114 conditions per place. [2024-05-12 13:11:26,396 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 260 selfloop transitions, 30 changer transitions 0/328 dead transitions. [2024-05-12 13:11:26,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 328 transitions, 4025 flow [2024-05-12 13:11:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:11:26,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:11:26,397 INFO L175 Difference]: Start difference. First operand has 213 places, 284 transitions, 3131 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:11:26,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 328 transitions, 4025 flow [2024-05-12 13:11:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 328 transitions, 3945 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-05-12 13:11:27,012 INFO L231 Difference]: Finished difference. Result has 218 places, 294 transitions, 3261 flow [2024-05-12 13:11:27,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3261, PETRI_PLACES=218, PETRI_TRANSITIONS=294} [2024-05-12 13:11:27,013 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 162 predicate places. [2024-05-12 13:11:27,013 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 294 transitions, 3261 flow [2024-05-12 13:11:27,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:11:27,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:27,014 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 13:11:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:11:27,014 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:27,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:27,014 INFO L85 PathProgramCache]: Analyzing trace with hash 330440540, now seen corresponding path program 2 times [2024-05-12 13:11:27,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:27,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853869154] [2024-05-12 13:11:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:27,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853869154] [2024-05-12 13:11:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853869154] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:27,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:27,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:11:27,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052519329] [2024-05-12 13:11:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:27,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:11:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:11:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:11:28,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:28,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 294 transitions, 3261 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:28,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:28,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:28,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:29,820 INFO L124 PetriNetUnfolderBase]: 7678/11766 cut-off events. [2024-05-12 13:11:29,821 INFO L125 PetriNetUnfolderBase]: For 481869/481881 co-relation queries the response was YES. [2024-05-12 13:11:29,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78570 conditions, 11766 events. 7678/11766 cut-off events. For 481869/481881 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 73293 event pairs, 2192 based on Foata normal form. 10/11538 useless extension candidates. Maximal degree in co-relation 78475. Up to 10728 conditions per place. [2024-05-12 13:11:29,949 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 275 selfloop transitions, 34 changer transitions 0/327 dead transitions. [2024-05-12 13:11:29,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 327 transitions, 4123 flow [2024-05-12 13:11:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:11:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:11:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-05-12 13:11:29,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2024-05-12 13:11:29,951 INFO L175 Difference]: Start difference. First operand has 218 places, 294 transitions, 3261 flow. Second operand 7 states and 167 transitions. [2024-05-12 13:11:29,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 327 transitions, 4123 flow [2024-05-12 13:11:30,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 327 transitions, 4070 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-05-12 13:11:30,703 INFO L231 Difference]: Finished difference. Result has 223 places, 297 transitions, 3330 flow [2024-05-12 13:11:30,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3330, PETRI_PLACES=223, PETRI_TRANSITIONS=297} [2024-05-12 13:11:30,703 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-05-12 13:11:30,704 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 297 transitions, 3330 flow [2024-05-12 13:11:30,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:11:30,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:30,704 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 13:11:30,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:11:30,704 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:30,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1235472875, now seen corresponding path program 5 times [2024-05-12 13:11:30,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:30,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279547777] [2024-05-12 13:11:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:30,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:32,015 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 13:11:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:32,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279547777] [2024-05-12 13:11:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279547777] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:32,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:32,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728951978] [2024-05-12 13:11:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:32,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:32,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:32,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:32,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 297 transitions, 3330 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:32,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:32,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:32,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:34,189 INFO L124 PetriNetUnfolderBase]: 7707/11891 cut-off events. [2024-05-12 13:11:34,189 INFO L125 PetriNetUnfolderBase]: For 504235/504275 co-relation queries the response was YES. [2024-05-12 13:11:34,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79681 conditions, 11891 events. 7707/11891 cut-off events. For 504235/504275 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 74708 event pairs, 2426 based on Foata normal form. 4/11671 useless extension candidates. Maximal degree in co-relation 79583. Up to 10678 conditions per place. [2024-05-12 13:11:34,327 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 305 selfloop transitions, 23 changer transitions 0/346 dead transitions. [2024-05-12 13:11:34,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 346 transitions, 4212 flow [2024-05-12 13:11:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-05-12 13:11:34,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-05-12 13:11:34,329 INFO L175 Difference]: Start difference. First operand has 223 places, 297 transitions, 3330 flow. Second operand 9 states and 212 transitions. [2024-05-12 13:11:34,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 346 transitions, 4212 flow [2024-05-12 13:11:34,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 346 transitions, 4130 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:11:34,907 INFO L231 Difference]: Finished difference. Result has 228 places, 299 transitions, 3383 flow [2024-05-12 13:11:34,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3383, PETRI_PLACES=228, PETRI_TRANSITIONS=299} [2024-05-12 13:11:34,907 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 172 predicate places. [2024-05-12 13:11:34,907 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 299 transitions, 3383 flow [2024-05-12 13:11:34,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:34,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:34,908 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 13:11:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:11:34,908 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:34,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1461673043, now seen corresponding path program 6 times [2024-05-12 13:11:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:34,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430036721] [2024-05-12 13:11:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:36,141 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 13:11:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:36,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430036721] [2024-05-12 13:11:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430036721] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:36,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:36,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508132125] [2024-05-12 13:11:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:36,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:36,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:36,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 299 transitions, 3383 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:36,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:36,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:36,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:38,185 INFO L124 PetriNetUnfolderBase]: 7744/11946 cut-off events. [2024-05-12 13:11:38,185 INFO L125 PetriNetUnfolderBase]: For 531089/531129 co-relation queries the response was YES. [2024-05-12 13:11:38,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81044 conditions, 11946 events. 7744/11946 cut-off events. For 531089/531129 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 75083 event pairs, 2468 based on Foata normal form. 4/11726 useless extension candidates. Maximal degree in co-relation 80945. Up to 10656 conditions per place. [2024-05-12 13:11:38,329 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 304 selfloop transitions, 26 changer transitions 0/348 dead transitions. [2024-05-12 13:11:38,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 348 transitions, 4271 flow [2024-05-12 13:11:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-05-12 13:11:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-05-12 13:11:38,330 INFO L175 Difference]: Start difference. First operand has 228 places, 299 transitions, 3383 flow. Second operand 9 states and 213 transitions. [2024-05-12 13:11:38,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 348 transitions, 4271 flow [2024-05-12 13:11:38,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 348 transitions, 4158 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:38,963 INFO L231 Difference]: Finished difference. Result has 231 places, 301 transitions, 3415 flow [2024-05-12 13:11:38,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3415, PETRI_PLACES=231, PETRI_TRANSITIONS=301} [2024-05-12 13:11:38,964 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-05-12 13:11:38,964 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 301 transitions, 3415 flow [2024-05-12 13:11:38,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:38,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:38,964 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 13:11:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:11:38,965 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:38,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash 121027657, now seen corresponding path program 7 times [2024-05-12 13:11:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499123720] [2024-05-12 13:11:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:40,083 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 13:11:40,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499123720] [2024-05-12 13:11:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499123720] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:11:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322082247] [2024-05-12 13:11:40,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:11:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:11:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:11:40,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:40,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 301 transitions, 3415 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:40,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:40,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:40,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:42,321 INFO L124 PetriNetUnfolderBase]: 7827/12082 cut-off events. [2024-05-12 13:11:42,322 INFO L125 PetriNetUnfolderBase]: For 555263/555303 co-relation queries the response was YES. [2024-05-12 13:11:42,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82472 conditions, 12082 events. 7827/12082 cut-off events. For 555263/555303 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 76127 event pairs, 2442 based on Foata normal form. 4/11856 useless extension candidates. Maximal degree in co-relation 82372. Up to 10709 conditions per place. [2024-05-12 13:11:42,469 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 305 selfloop transitions, 34 changer transitions 0/357 dead transitions. [2024-05-12 13:11:42,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 357 transitions, 4388 flow [2024-05-12 13:11:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-05-12 13:11:42,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4822222222222222 [2024-05-12 13:11:42,470 INFO L175 Difference]: Start difference. First operand has 231 places, 301 transitions, 3415 flow. Second operand 9 states and 217 transitions. [2024-05-12 13:11:42,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 357 transitions, 4388 flow [2024-05-12 13:11:43,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 357 transitions, 4261 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-05-12 13:11:43,239 INFO L231 Difference]: Finished difference. Result has 234 places, 307 transitions, 3506 flow [2024-05-12 13:11:43,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3506, PETRI_PLACES=234, PETRI_TRANSITIONS=307} [2024-05-12 13:11:43,239 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 178 predicate places. [2024-05-12 13:11:43,239 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 307 transitions, 3506 flow [2024-05-12 13:11:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:11:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:43,240 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 13:11:43,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:11:43,240 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:43,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:43,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1718624254, now seen corresponding path program 6 times [2024-05-12 13:11:43,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:43,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069595292] [2024-05-12 13:11:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:43,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:44,471 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 13:11:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:44,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069595292] [2024-05-12 13:11:44,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069595292] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:44,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:44,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648202693] [2024-05-12 13:11:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:44,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:11:44,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 307 transitions, 3506 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:44,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:44,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:11:44,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:46,568 INFO L124 PetriNetUnfolderBase]: 7327/11415 cut-off events. [2024-05-12 13:11:46,568 INFO L125 PetriNetUnfolderBase]: For 551085/551127 co-relation queries the response was YES. [2024-05-12 13:11:46,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78682 conditions, 11415 events. 7327/11415 cut-off events. For 551085/551127 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73566 event pairs, 2123 based on Foata normal form. 6/11185 useless extension candidates. Maximal degree in co-relation 78580. Up to 9643 conditions per place. [2024-05-12 13:11:46,720 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 289 selfloop transitions, 65 changer transitions 0/382 dead transitions. [2024-05-12 13:11:46,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 382 transitions, 5066 flow [2024-05-12 13:11:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:11:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:11:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-05-12 13:11:46,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:11:46,722 INFO L175 Difference]: Start difference. First operand has 234 places, 307 transitions, 3506 flow. Second operand 10 states and 255 transitions. [2024-05-12 13:11:46,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 382 transitions, 5066 flow [2024-05-12 13:11:47,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 382 transitions, 4909 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-05-12 13:11:47,596 INFO L231 Difference]: Finished difference. Result has 240 places, 316 transitions, 3805 flow [2024-05-12 13:11:47,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3805, PETRI_PLACES=240, PETRI_TRANSITIONS=316} [2024-05-12 13:11:47,596 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 184 predicate places. [2024-05-12 13:11:47,596 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 316 transitions, 3805 flow [2024-05-12 13:11:47,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:11:47,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:47,597 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 13:11:47,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:11:47,597 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1726249045, now seen corresponding path program 8 times [2024-05-12 13:11:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:47,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993307127] [2024-05-12 13:11:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:47,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:11:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993307127] [2024-05-12 13:11:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993307127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:48,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:48,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251114793] [2024-05-12 13:11:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:49,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:49,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 316 transitions, 3805 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:49,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:49,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:49,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:51,226 INFO L124 PetriNetUnfolderBase]: 7867/12139 cut-off events. [2024-05-12 13:11:51,226 INFO L125 PetriNetUnfolderBase]: For 602609/602649 co-relation queries the response was YES. [2024-05-12 13:11:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85725 conditions, 12139 events. 7867/12139 cut-off events. For 602609/602649 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 76566 event pairs, 2449 based on Foata normal form. 4/11915 useless extension candidates. Maximal degree in co-relation 85620. Up to 10769 conditions per place. [2024-05-12 13:11:51,391 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 317 selfloop transitions, 35 changer transitions 0/370 dead transitions. [2024-05-12 13:11:51,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 370 transitions, 4801 flow [2024-05-12 13:11:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-05-12 13:11:51,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-05-12 13:11:51,395 INFO L175 Difference]: Start difference. First operand has 240 places, 316 transitions, 3805 flow. Second operand 9 states and 218 transitions. [2024-05-12 13:11:51,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 370 transitions, 4801 flow [2024-05-12 13:11:52,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 370 transitions, 4336 flow, removed 100 selfloop flow, removed 8 redundant places. [2024-05-12 13:11:52,496 INFO L231 Difference]: Finished difference. Result has 241 places, 320 transitions, 3545 flow [2024-05-12 13:11:52,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3545, PETRI_PLACES=241, PETRI_TRANSITIONS=320} [2024-05-12 13:11:52,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 185 predicate places. [2024-05-12 13:11:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 320 transitions, 3545 flow [2024-05-12 13:11:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:52,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:52,498 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 13:11:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:11:52,498 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1726258345, now seen corresponding path program 9 times [2024-05-12 13:11:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935348695] [2024-05-12 13:11:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:53,820 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 13:11:53,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935348695] [2024-05-12 13:11:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935348695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:53,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:53,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:53,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387706057] [2024-05-12 13:11:53,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:53,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:53,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:53,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:53,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:53,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 320 transitions, 3545 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:53,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:53,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:53,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:11:56,014 INFO L124 PetriNetUnfolderBase]: 7904/12196 cut-off events. [2024-05-12 13:11:56,014 INFO L125 PetriNetUnfolderBase]: For 618014/618054 co-relation queries the response was YES. [2024-05-12 13:11:56,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85360 conditions, 12196 events. 7904/12196 cut-off events. For 618014/618054 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76933 event pairs, 2469 based on Foata normal form. 4/11970 useless extension candidates. Maximal degree in co-relation 85256. Up to 10713 conditions per place. [2024-05-12 13:11:56,182 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 314 selfloop transitions, 40 changer transitions 0/372 dead transitions. [2024-05-12 13:11:56,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 372 transitions, 4517 flow [2024-05-12 13:11:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:11:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:11:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-05-12 13:11:56,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-05-12 13:11:56,183 INFO L175 Difference]: Start difference. First operand has 241 places, 320 transitions, 3545 flow. Second operand 9 states and 218 transitions. [2024-05-12 13:11:56,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 372 transitions, 4517 flow [2024-05-12 13:11:56,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 372 transitions, 4370 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-05-12 13:11:56,973 INFO L231 Difference]: Finished difference. Result has 245 places, 322 transitions, 3587 flow [2024-05-12 13:11:56,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3587, PETRI_PLACES=245, PETRI_TRANSITIONS=322} [2024-05-12 13:11:56,973 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 189 predicate places. [2024-05-12 13:11:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 322 transitions, 3587 flow [2024-05-12 13:11:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:56,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:11:56,974 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 13:11:56,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:11:56,974 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:11:56,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:11:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1120277483, now seen corresponding path program 10 times [2024-05-12 13:11:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:11:56,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940612936] [2024-05-12 13:11:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:11:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:11:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:11:58,054 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 13:11:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:11:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940612936] [2024-05-12 13:11:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940612936] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:11:58,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:11:58,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:11:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059405765] [2024-05-12 13:11:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:11:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:11:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:11:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:11:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:11:58,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:11:58,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 322 transitions, 3587 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:11:58,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:11:58,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:11:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:00,461 INFO L124 PetriNetUnfolderBase]: 7941/12269 cut-off events. [2024-05-12 13:12:00,461 INFO L125 PetriNetUnfolderBase]: For 643662/643702 co-relation queries the response was YES. [2024-05-12 13:12:00,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86416 conditions, 12269 events. 7941/12269 cut-off events. For 643662/643702 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 77616 event pairs, 2492 based on Foata normal form. 4/12040 useless extension candidates. Maximal degree in co-relation 86311. Up to 10943 conditions per place. [2024-05-12 13:12:00,589 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 319 selfloop transitions, 34 changer transitions 0/371 dead transitions. [2024-05-12 13:12:00,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 371 transitions, 4543 flow [2024-05-12 13:12:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-05-12 13:12:00,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-05-12 13:12:00,591 INFO L175 Difference]: Start difference. First operand has 245 places, 322 transitions, 3587 flow. Second operand 9 states and 213 transitions. [2024-05-12 13:12:00,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 371 transitions, 4543 flow [2024-05-12 13:12:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 371 transitions, 4372 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:01,560 INFO L231 Difference]: Finished difference. Result has 247 places, 324 transitions, 3600 flow [2024-05-12 13:12:01,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3600, PETRI_PLACES=247, PETRI_TRANSITIONS=324} [2024-05-12 13:12:01,561 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 191 predicate places. [2024-05-12 13:12:01,561 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 324 transitions, 3600 flow [2024-05-12 13:12:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:01,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:01,562 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 13:12:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:12:01,562 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:01,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:01,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1576877456, now seen corresponding path program 1 times [2024-05-12 13:12:01,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:01,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54814724] [2024-05-12 13:12:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:01,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:02,700 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 13:12:02,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:02,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54814724] [2024-05-12 13:12:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54814724] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:02,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:02,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547507431] [2024-05-12 13:12:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:02,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:12:02,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 324 transitions, 3600 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:02,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:02,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:12:02,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:05,037 INFO L124 PetriNetUnfolderBase]: 7987/12341 cut-off events. [2024-05-12 13:12:05,037 INFO L125 PetriNetUnfolderBase]: For 656568/656608 co-relation queries the response was YES. [2024-05-12 13:12:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86749 conditions, 12341 events. 7987/12341 cut-off events. For 656568/656608 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 78127 event pairs, 2455 based on Foata normal form. 2/12108 useless extension candidates. Maximal degree in co-relation 86643. Up to 11015 conditions per place. [2024-05-12 13:12:05,192 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 323 selfloop transitions, 36 changer transitions 0/377 dead transitions. [2024-05-12 13:12:05,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 377 transitions, 4565 flow [2024-05-12 13:12:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-05-12 13:12:05,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-05-12 13:12:05,194 INFO L175 Difference]: Start difference. First operand has 247 places, 324 transitions, 3600 flow. Second operand 9 states and 214 transitions. [2024-05-12 13:12:05,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 377 transitions, 4565 flow [2024-05-12 13:12:06,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 377 transitions, 4313 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:06,156 INFO L231 Difference]: Finished difference. Result has 249 places, 330 transitions, 3541 flow [2024-05-12 13:12:06,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3541, PETRI_PLACES=249, PETRI_TRANSITIONS=330} [2024-05-12 13:12:06,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2024-05-12 13:12:06,157 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 330 transitions, 3541 flow [2024-05-12 13:12:06,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:06,157 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 13:12:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:12:06,158 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:06,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1120268183, now seen corresponding path program 11 times [2024-05-12 13:12:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580719119] [2024-05-12 13:12:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:07,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580719119] [2024-05-12 13:12:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580719119] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361621878] [2024-05-12 13:12:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:07,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:12:07,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 330 transitions, 3541 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:07,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:07,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:12:07,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:09,503 INFO L124 PetriNetUnfolderBase]: 8024/12380 cut-off events. [2024-05-12 13:12:09,504 INFO L125 PetriNetUnfolderBase]: For 649669/649709 co-relation queries the response was YES. [2024-05-12 13:12:09,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86366 conditions, 12380 events. 8024/12380 cut-off events. For 649669/649709 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 78237 event pairs, 2464 based on Foata normal form. 4/12153 useless extension candidates. Maximal degree in co-relation 86259. Up to 10908 conditions per place. [2024-05-12 13:12:09,654 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 321 selfloop transitions, 40 changer transitions 0/379 dead transitions. [2024-05-12 13:12:09,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 379 transitions, 4511 flow [2024-05-12 13:12:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-05-12 13:12:09,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-05-12 13:12:09,655 INFO L175 Difference]: Start difference. First operand has 249 places, 330 transitions, 3541 flow. Second operand 9 states and 214 transitions. [2024-05-12 13:12:09,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 379 transitions, 4511 flow [2024-05-12 13:12:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 379 transitions, 4447 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:10,739 INFO L231 Difference]: Finished difference. Result has 251 places, 332 transitions, 3673 flow [2024-05-12 13:12:10,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3673, PETRI_PLACES=251, PETRI_TRANSITIONS=332} [2024-05-12 13:12:10,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 195 predicate places. [2024-05-12 13:12:10,739 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 332 transitions, 3673 flow [2024-05-12 13:12:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:10,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:10,740 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 13:12:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:12:10,740 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:10,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1588822655, now seen corresponding path program 12 times [2024-05-12 13:12:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269276604] [2024-05-12 13:12:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:11,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269276604] [2024-05-12 13:12:11,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269276604] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:11,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:11,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:11,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669367601] [2024-05-12 13:12:11,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:11,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:12:12,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 332 transitions, 3673 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:12,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:12,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:12:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:14,179 INFO L124 PetriNetUnfolderBase]: 8024/12424 cut-off events. [2024-05-12 13:12:14,180 INFO L125 PetriNetUnfolderBase]: For 671938/671978 co-relation queries the response was YES. [2024-05-12 13:12:14,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87201 conditions, 12424 events. 8024/12424 cut-off events. For 671938/671978 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 78968 event pairs, 2484 based on Foata normal form. 4/12186 useless extension candidates. Maximal degree in co-relation 87093. Up to 11129 conditions per place. [2024-05-12 13:12:14,339 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 336 selfloop transitions, 25 changer transitions 0/379 dead transitions. [2024-05-12 13:12:14,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 379 transitions, 4629 flow [2024-05-12 13:12:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-05-12 13:12:14,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-05-12 13:12:14,340 INFO L175 Difference]: Start difference. First operand has 251 places, 332 transitions, 3673 flow. Second operand 9 states and 210 transitions. [2024-05-12 13:12:14,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 379 transitions, 4629 flow [2024-05-12 13:12:15,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 379 transitions, 4449 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:15,382 INFO L231 Difference]: Finished difference. Result has 253 places, 334 transitions, 3660 flow [2024-05-12 13:12:15,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3660, PETRI_PLACES=253, PETRI_TRANSITIONS=334} [2024-05-12 13:12:15,383 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 197 predicate places. [2024-05-12 13:12:15,383 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 334 transitions, 3660 flow [2024-05-12 13:12:15,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 13:12:15,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:15,384 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 13:12:15,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:12:15,384 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:15,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash 772851274, now seen corresponding path program 2 times [2024-05-12 13:12:15,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:15,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446223371] [2024-05-12 13:12:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:15,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:16,194 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 13:12:16,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:16,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446223371] [2024-05-12 13:12:16,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446223371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:16,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:16,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197517799] [2024-05-12 13:12:16,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:16,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:16,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:16,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:16,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 334 transitions, 3660 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:12:16,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:16,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:16,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:18,294 INFO L124 PetriNetUnfolderBase]: 7689/11991 cut-off events. [2024-05-12 13:12:18,295 INFO L125 PetriNetUnfolderBase]: For 635902/636086 co-relation queries the response was YES. [2024-05-12 13:12:18,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81428 conditions, 11991 events. 7689/11991 cut-off events. For 635902/636086 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77589 event pairs, 2598 based on Foata normal form. 70/11757 useless extension candidates. Maximal degree in co-relation 81319. Up to 10663 conditions per place. [2024-05-12 13:12:18,445 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 287 selfloop transitions, 18 changer transitions 0/358 dead transitions. [2024-05-12 13:12:18,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 358 transitions, 4384 flow [2024-05-12 13:12:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-05-12 13:12:18,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2024-05-12 13:12:18,447 INFO L175 Difference]: Start difference. First operand has 253 places, 334 transitions, 3660 flow. Second operand 7 states and 162 transitions. [2024-05-12 13:12:18,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 358 transitions, 4384 flow [2024-05-12 13:12:19,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 358 transitions, 4239 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:19,361 INFO L231 Difference]: Finished difference. Result has 253 places, 337 transitions, 3617 flow [2024-05-12 13:12:19,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3617, PETRI_PLACES=253, PETRI_TRANSITIONS=337} [2024-05-12 13:12:19,362 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 197 predicate places. [2024-05-12 13:12:19,362 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 337 transitions, 3617 flow [2024-05-12 13:12:19,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:12:19,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:19,362 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 13:12:19,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:12:19,362 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:19,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 772347214, now seen corresponding path program 3 times [2024-05-12 13:12:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:19,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444400090] [2024-05-12 13:12:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:19,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:20,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444400090] [2024-05-12 13:12:20,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444400090] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:20,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:20,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839918461] [2024-05-12 13:12:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:20,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:20,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 337 transitions, 3617 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:12:20,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:20,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:20,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:22,345 INFO L124 PetriNetUnfolderBase]: 7680/11976 cut-off events. [2024-05-12 13:12:22,345 INFO L125 PetriNetUnfolderBase]: For 640158/640342 co-relation queries the response was YES. [2024-05-12 13:12:22,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80890 conditions, 11976 events. 7680/11976 cut-off events. For 640158/640342 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77500 event pairs, 2590 based on Foata normal form. 70/11742 useless extension candidates. Maximal degree in co-relation 80780. Up to 10609 conditions per place. [2024-05-12 13:12:22,524 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 286 selfloop transitions, 23 changer transitions 0/362 dead transitions. [2024-05-12 13:12:22,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 362 transitions, 4317 flow [2024-05-12 13:12:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-05-12 13:12:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47714285714285715 [2024-05-12 13:12:22,526 INFO L175 Difference]: Start difference. First operand has 253 places, 337 transitions, 3617 flow. Second operand 7 states and 167 transitions. [2024-05-12 13:12:22,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 362 transitions, 4317 flow [2024-05-12 13:12:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 362 transitions, 4204 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 13:12:23,629 INFO L231 Difference]: Finished difference. Result has 255 places, 337 transitions, 3556 flow [2024-05-12 13:12:23,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3556, PETRI_PLACES=255, PETRI_TRANSITIONS=337} [2024-05-12 13:12:23,630 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 199 predicate places. [2024-05-12 13:12:23,630 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 337 transitions, 3556 flow [2024-05-12 13:12:23,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 13:12:23,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:23,630 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 13:12:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:12:23,631 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:23,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash 772346780, now seen corresponding path program 3 times [2024-05-12 13:12:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:23,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911034419] [2024-05-12 13:12:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:23,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:24,470 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 13:12:24,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:24,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911034419] [2024-05-12 13:12:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911034419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:24,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632069951] [2024-05-12 13:12:24,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:24,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:24,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:24,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:12:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 337 transitions, 3556 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:12:24,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:26,595 INFO L124 PetriNetUnfolderBase]: 8093/12502 cut-off events. [2024-05-12 13:12:26,596 INFO L125 PetriNetUnfolderBase]: For 677234/677302 co-relation queries the response was YES. [2024-05-12 13:12:26,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85684 conditions, 12502 events. 8093/12502 cut-off events. For 677234/677302 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 79683 event pairs, 2665 based on Foata normal form. 25/12279 useless extension candidates. Maximal degree in co-relation 85574. Up to 11446 conditions per place. [2024-05-12 13:12:26,762 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 320 selfloop transitions, 17 changer transitions 0/358 dead transitions. [2024-05-12 13:12:26,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 358 transitions, 4300 flow [2024-05-12 13:12:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-05-12 13:12:26,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-05-12 13:12:26,763 INFO L175 Difference]: Start difference. First operand has 255 places, 337 transitions, 3556 flow. Second operand 7 states and 155 transitions. [2024-05-12 13:12:26,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 358 transitions, 4300 flow [2024-05-12 13:12:27,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 358 transitions, 4192 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 13:12:27,599 INFO L231 Difference]: Finished difference. Result has 256 places, 337 transitions, 3488 flow [2024-05-12 13:12:27,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3488, PETRI_PLACES=256, PETRI_TRANSITIONS=337} [2024-05-12 13:12:27,599 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 200 predicate places. [2024-05-12 13:12:27,599 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 337 transitions, 3488 flow [2024-05-12 13:12:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:27,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:27,600 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 13:12:27,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:12:27,600 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:27,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash -871979216, now seen corresponding path program 7 times [2024-05-12 13:12:27,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:27,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696658357] [2024-05-12 13:12:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:28,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696658357] [2024-05-12 13:12:28,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696658357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:28,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:28,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438027024] [2024-05-12 13:12:28,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:28,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:28,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:28,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:28,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 337 transitions, 3488 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:28,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:28,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:28,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:31,372 INFO L124 PetriNetUnfolderBase]: 7984/12966 cut-off events. [2024-05-12 13:12:31,373 INFO L125 PetriNetUnfolderBase]: For 673617/673694 co-relation queries the response was YES. [2024-05-12 13:12:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85702 conditions, 12966 events. 7984/12966 cut-off events. For 673617/673694 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 89255 event pairs, 2238 based on Foata normal form. 14/12577 useless extension candidates. Maximal degree in co-relation 85591. Up to 10761 conditions per place. [2024-05-12 13:12:31,544 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 376 selfloop transitions, 72 changer transitions 0/476 dead transitions. [2024-05-12 13:12:31,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 476 transitions, 5562 flow [2024-05-12 13:12:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:12:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:12:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 281 transitions. [2024-05-12 13:12:31,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109090909090909 [2024-05-12 13:12:31,546 INFO L175 Difference]: Start difference. First operand has 256 places, 337 transitions, 3488 flow. Second operand 11 states and 281 transitions. [2024-05-12 13:12:31,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 476 transitions, 5562 flow [2024-05-12 13:12:32,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 476 transitions, 5458 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:32,695 INFO L231 Difference]: Finished difference. Result has 265 places, 402 transitions, 4560 flow [2024-05-12 13:12:32,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4560, PETRI_PLACES=265, PETRI_TRANSITIONS=402} [2024-05-12 13:12:32,696 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 209 predicate places. [2024-05-12 13:12:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 402 transitions, 4560 flow [2024-05-12 13:12:32,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:32,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:32,696 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 13:12:32,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:12:32,697 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:32,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1989056864, now seen corresponding path program 8 times [2024-05-12 13:12:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422397628] [2024-05-12 13:12:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422397628] [2024-05-12 13:12:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422397628] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:33,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:33,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103818415] [2024-05-12 13:12:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:33,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:33,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:33,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 402 transitions, 4560 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:33,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:33,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:36,659 INFO L124 PetriNetUnfolderBase]: 8498/13777 cut-off events. [2024-05-12 13:12:36,660 INFO L125 PetriNetUnfolderBase]: For 708791/708865 co-relation queries the response was YES. [2024-05-12 13:12:36,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94270 conditions, 13777 events. 8498/13777 cut-off events. For 708791/708865 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 95330 event pairs, 2307 based on Foata normal form. 10/13363 useless extension candidates. Maximal degree in co-relation 94153. Up to 11227 conditions per place. [2024-05-12 13:12:36,852 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 389 selfloop transitions, 145 changer transitions 0/562 dead transitions. [2024-05-12 13:12:36,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 562 transitions, 7342 flow [2024-05-12 13:12:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:12:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:12:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-05-12 13:12:36,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127272727272727 [2024-05-12 13:12:36,853 INFO L175 Difference]: Start difference. First operand has 265 places, 402 transitions, 4560 flow. Second operand 11 states and 282 transitions. [2024-05-12 13:12:36,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 562 transitions, 7342 flow [2024-05-12 13:12:38,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 562 transitions, 7180 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-05-12 13:12:38,027 INFO L231 Difference]: Finished difference. Result has 280 places, 487 transitions, 6306 flow [2024-05-12 13:12:38,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6306, PETRI_PLACES=280, PETRI_TRANSITIONS=487} [2024-05-12 13:12:38,028 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 224 predicate places. [2024-05-12 13:12:38,028 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 487 transitions, 6306 flow [2024-05-12 13:12:38,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:38,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:38,029 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 13:12:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:12:38,029 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:38,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash 254195634, now seen corresponding path program 9 times [2024-05-12 13:12:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:38,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761988024] [2024-05-12 13:12:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:38,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:38,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761988024] [2024-05-12 13:12:38,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761988024] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:38,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:38,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381002234] [2024-05-12 13:12:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:38,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:38,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:38,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:39,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 487 transitions, 6306 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:39,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:39,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:39,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:42,487 INFO L124 PetriNetUnfolderBase]: 9323/15099 cut-off events. [2024-05-12 13:12:42,487 INFO L125 PetriNetUnfolderBase]: For 755523/755612 co-relation queries the response was YES. [2024-05-12 13:12:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106274 conditions, 15099 events. 9323/15099 cut-off events. For 755523/755612 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 106067 event pairs, 2279 based on Foata normal form. 22/14667 useless extension candidates. Maximal degree in co-relation 106149. Up to 12109 conditions per place. [2024-05-12 13:12:42,733 INFO L140 encePairwiseOnDemand]: 32/50 looper letters, 496 selfloop transitions, 225 changer transitions 0/749 dead transitions. [2024-05-12 13:12:42,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 749 transitions, 11234 flow [2024-05-12 13:12:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 13:12:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 13:12:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 325 transitions. [2024-05-12 13:12:42,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:12:42,735 INFO L175 Difference]: Start difference. First operand has 280 places, 487 transitions, 6306 flow. Second operand 13 states and 325 transitions. [2024-05-12 13:12:42,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 749 transitions, 11234 flow [2024-05-12 13:12:44,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 749 transitions, 10943 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:44,126 INFO L231 Difference]: Finished difference. Result has 294 places, 668 transitions, 10018 flow [2024-05-12 13:12:44,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10018, PETRI_PLACES=294, PETRI_TRANSITIONS=668} [2024-05-12 13:12:44,128 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 238 predicate places. [2024-05-12 13:12:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 668 transitions, 10018 flow [2024-05-12 13:12:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:44,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:44,129 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 13:12:44,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:12:44,129 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:44,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2083506886, now seen corresponding path program 10 times [2024-05-12 13:12:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420413148] [2024-05-12 13:12:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:45,700 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 13:12:45,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:45,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420413148] [2024-05-12 13:12:45,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420413148] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:45,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:45,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:12:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017851749] [2024-05-12 13:12:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:12:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:12:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:12:45,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:12:45,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 668 transitions, 10018 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:45,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:45,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:12:45,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:50,214 INFO L124 PetriNetUnfolderBase]: 10091/16396 cut-off events. [2024-05-12 13:12:50,215 INFO L125 PetriNetUnfolderBase]: For 820312/820408 co-relation queries the response was YES. [2024-05-12 13:12:50,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121227 conditions, 16396 events. 10091/16396 cut-off events. For 820312/820408 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 117800 event pairs, 2437 based on Foata normal form. 22/15898 useless extension candidates. Maximal degree in co-relation 121097. Up to 13038 conditions per place. [2024-05-12 13:12:50,450 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 550 selfloop transitions, 309 changer transitions 0/887 dead transitions. [2024-05-12 13:12:50,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 887 transitions, 14898 flow [2024-05-12 13:12:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:12:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:12:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-05-12 13:12:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-05-12 13:12:50,451 INFO L175 Difference]: Start difference. First operand has 294 places, 668 transitions, 10018 flow. Second operand 11 states and 280 transitions. [2024-05-12 13:12:50,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 887 transitions, 14898 flow [2024-05-12 13:12:52,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 887 transitions, 14588 flow, removed 144 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:52,992 INFO L231 Difference]: Finished difference. Result has 306 places, 818 transitions, 13693 flow [2024-05-12 13:12:52,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=9838, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13693, PETRI_PLACES=306, PETRI_TRANSITIONS=818} [2024-05-12 13:12:52,993 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 250 predicate places. [2024-05-12 13:12:52,993 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 818 transitions, 13693 flow [2024-05-12 13:12:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:12:52,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:52,994 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 13:12:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:12:52,994 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:52,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 595371345, now seen corresponding path program 1 times [2024-05-12 13:12:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868239267] [2024-05-12 13:12:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:53,977 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 13:12:53,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:53,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868239267] [2024-05-12 13:12:53,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868239267] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:53,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:53,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:53,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635545346] [2024-05-12 13:12:53,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:53,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:54,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:12:54,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 818 transitions, 13693 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:12:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:58,795 INFO L124 PetriNetUnfolderBase]: 11443/18469 cut-off events. [2024-05-12 13:12:58,796 INFO L125 PetriNetUnfolderBase]: For 873462/873707 co-relation queries the response was YES. [2024-05-12 13:12:58,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136983 conditions, 18469 events. 11443/18469 cut-off events. For 873462/873707 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 131863 event pairs, 3466 based on Foata normal form. 185/18055 useless extension candidates. Maximal degree in co-relation 136847. Up to 15808 conditions per place. [2024-05-12 13:12:59,077 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 772 selfloop transitions, 26 changer transitions 0/851 dead transitions. [2024-05-12 13:12:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 851 transitions, 15509 flow [2024-05-12 13:12:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-05-12 13:12:59,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-05-12 13:12:59,078 INFO L175 Difference]: Start difference. First operand has 306 places, 818 transitions, 13693 flow. Second operand 7 states and 165 transitions. [2024-05-12 13:12:59,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 851 transitions, 15509 flow [2024-05-12 13:13:01,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 851 transitions, 14919 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:01,400 INFO L231 Difference]: Finished difference. Result has 307 places, 821 transitions, 13219 flow [2024-05-12 13:13:01,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13103, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13219, PETRI_PLACES=307, PETRI_TRANSITIONS=821} [2024-05-12 13:13:01,401 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 251 predicate places. [2024-05-12 13:13:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 821 transitions, 13219 flow [2024-05-12 13:13:01,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:01,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:01,402 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 13:13:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:13:01,402 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:01,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1817565597, now seen corresponding path program 2 times [2024-05-12 13:13:01,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:01,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239568078] [2024-05-12 13:13:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:02,284 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 13:13:02,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:02,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239568078] [2024-05-12 13:13:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239568078] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:02,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:02,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089289926] [2024-05-12 13:13:02,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:02,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:02,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:13:02,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 821 transitions, 13219 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:02,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:02,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:13:02,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:07,033 INFO L124 PetriNetUnfolderBase]: 11477/18468 cut-off events. [2024-05-12 13:13:07,033 INFO L125 PetriNetUnfolderBase]: For 879631/879876 co-relation queries the response was YES. [2024-05-12 13:13:07,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136987 conditions, 18468 events. 11477/18468 cut-off events. For 879631/879876 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 131605 event pairs, 3410 based on Foata normal form. 185/18066 useless extension candidates. Maximal degree in co-relation 136850. Up to 15774 conditions per place. [2024-05-12 13:13:07,313 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 766 selfloop transitions, 39 changer transitions 0/858 dead transitions. [2024-05-12 13:13:07,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 858 transitions, 15277 flow [2024-05-12 13:13:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:13:07,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:13:07,314 INFO L175 Difference]: Start difference. First operand has 307 places, 821 transitions, 13219 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:13:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 858 transitions, 15277 flow [2024-05-12 13:13:09,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 858 transitions, 15187 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:09,446 INFO L231 Difference]: Finished difference. Result has 309 places, 827 transitions, 13331 flow [2024-05-12 13:13:09,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13129, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13331, PETRI_PLACES=309, PETRI_TRANSITIONS=827} [2024-05-12 13:13:09,447 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 253 predicate places. [2024-05-12 13:13:09,447 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 827 transitions, 13331 flow [2024-05-12 13:13:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:09,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:09,448 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 13:13:09,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:13:09,448 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:09,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash 595491501, now seen corresponding path program 1 times [2024-05-12 13:13:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:09,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848280838] [2024-05-12 13:13:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:10,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:10,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848280838] [2024-05-12 13:13:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848280838] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:10,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:10,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576935288] [2024-05-12 13:13:10,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:10,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:10,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:13:10,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 827 transitions, 13331 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:10,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:10,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:13:10,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:15,335 INFO L124 PetriNetUnfolderBase]: 11528/18536 cut-off events. [2024-05-12 13:13:15,335 INFO L125 PetriNetUnfolderBase]: For 907626/907871 co-relation queries the response was YES. [2024-05-12 13:13:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138509 conditions, 18536 events. 11528/18536 cut-off events. For 907626/907871 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 132019 event pairs, 3438 based on Foata normal form. 186/18136 useless extension candidates. Maximal degree in co-relation 138371. Up to 15830 conditions per place. [2024-05-12 13:13:15,673 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 782 selfloop transitions, 33 changer transitions 0/868 dead transitions. [2024-05-12 13:13:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 868 transitions, 15393 flow [2024-05-12 13:13:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:13:15,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48857142857142855 [2024-05-12 13:13:15,675 INFO L175 Difference]: Start difference. First operand has 309 places, 827 transitions, 13331 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:13:15,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 868 transitions, 15393 flow [2024-05-12 13:13:17,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 868 transitions, 15312 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:17,992 INFO L231 Difference]: Finished difference. Result has 313 places, 833 transitions, 13396 flow [2024-05-12 13:13:17,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13250, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13396, PETRI_PLACES=313, PETRI_TRANSITIONS=833} [2024-05-12 13:13:17,993 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 257 predicate places. [2024-05-12 13:13:17,993 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 833 transitions, 13396 flow [2024-05-12 13:13:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:17,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:17,993 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 13:13:17,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:13:17,993 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:17,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -158629551, now seen corresponding path program 2 times [2024-05-12 13:13:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784950205] [2024-05-12 13:13:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:18,911 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 13:13:18,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:18,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784950205] [2024-05-12 13:13:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784950205] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:18,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:18,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659766983] [2024-05-12 13:13:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:18,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:13:18,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 833 transitions, 13396 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:18,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:18,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:13:18,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:23,734 INFO L124 PetriNetUnfolderBase]: 11578/18626 cut-off events. [2024-05-12 13:13:23,734 INFO L125 PetriNetUnfolderBase]: For 932487/932735 co-relation queries the response was YES. [2024-05-12 13:13:24,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140602 conditions, 18626 events. 11578/18626 cut-off events. For 932487/932735 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 132867 event pairs, 3434 based on Foata normal form. 188/18221 useless extension candidates. Maximal degree in co-relation 140462. Up to 15872 conditions per place. [2024-05-12 13:13:24,127 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 778 selfloop transitions, 36 changer transitions 0/867 dead transitions. [2024-05-12 13:13:24,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 867 transitions, 15386 flow [2024-05-12 13:13:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-05-12 13:13:24,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-05-12 13:13:24,128 INFO L175 Difference]: Start difference. First operand has 313 places, 833 transitions, 13396 flow. Second operand 7 states and 168 transitions. [2024-05-12 13:13:24,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 867 transitions, 15386 flow [2024-05-12 13:13:26,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 867 transitions, 15320 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:26,496 INFO L231 Difference]: Finished difference. Result has 317 places, 836 transitions, 13448 flow [2024-05-12 13:13:26,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=13338, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13448, PETRI_PLACES=317, PETRI_TRANSITIONS=836} [2024-05-12 13:13:26,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 261 predicate places. [2024-05-12 13:13:26,497 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 836 transitions, 13448 flow [2024-05-12 13:13:26,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:26,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:26,506 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 13:13:26,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:13:26,507 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:26,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1564171065, now seen corresponding path program 3 times [2024-05-12 13:13:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:26,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73099921] [2024-05-12 13:13:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:26,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:27,371 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 13:13:27,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73099921] [2024-05-12 13:13:27,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73099921] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:27,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:27,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:27,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497353601] [2024-05-12 13:13:27,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:27,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:27,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-05-12 13:13:27,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 836 transitions, 13448 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:27,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:27,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-05-12 13:13:27,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand