./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:05:36,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:05:36,263 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:05:36,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:05:36,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:05:36,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:05:36,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:05:36,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:05:36,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:05:36,300 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:05:36,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:05:36,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:05:36,301 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:05:36,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:05:36,302 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:05:36,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:05:36,302 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:05:36,302 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:05:36,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:05:36,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:05:36,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:05:36,304 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:05:36,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:05:36,304 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:05:36,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:05:36,305 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:05:36,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:05:36,305 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:05:36,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:05:36,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:05:36,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:05:36,306 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:05:36,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:05:36,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:05:36,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:05:36,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:05:36,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:05:36,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:05:36,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:05:36,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:05:36,309 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:05:36,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:05:36,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:05:36,310 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:05:36,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:05:36,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:05:36,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:05:36,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:05:36,486 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:05:36,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-21 21:05:37,412 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:05:37,656 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:05:37,656 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-21 21:05:37,666 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0135b1101/0875cc0f74ce45c98fda7eb6619ffad2/FLAGbdd8907b6 [2024-06-21 21:05:37,675 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0135b1101/0875cc0f74ce45c98fda7eb6619ffad2 [2024-06-21 21:05:37,677 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:05:37,678 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:05:37,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038.opt.yml/witness.yml [2024-06-21 21:05:37,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:05:37,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:05:37,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:05:37,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:05:37,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:05:37,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:05:37" (1/2) ... [2024-06-21 21:05:37,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf36ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:05:37, skipping insertion in model container [2024-06-21 21:05:37,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:05:37" (1/2) ... [2024-06-21 21:05:37,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77f50f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:05:37, skipping insertion in model container [2024-06-21 21:05:37,845 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:05:37" (2/2) ... [2024-06-21 21:05:37,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf36ce1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:37, skipping insertion in model container [2024-06-21 21:05:37,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:05:37" (2/2) ... [2024-06-21 21:05:37,846 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:05:37,911 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:05:37,912 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 21:05:37,912 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 21:05:37,913 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || y$r_buff0_thd1 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 21:05:37,913 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:05:37,913 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-21 21:05:37,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:05:38,220 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:05:38,227 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:05:38,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:05:38,373 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:05:38,373 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38 WrapperNode [2024-06-21 21:05:38,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:05:38,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:05:38,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:05:38,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:05:38,380 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 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,398 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 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,423 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-21 21:05:38,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:05:38,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:05:38,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:05:38,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:05:38,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,435 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,456 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:05:38,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,464 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:05:38,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:05:38,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:05:38,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:05:38,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (1/1) ... [2024-06-21 21:05:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:05:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:05:38,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:05:38,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:05:38,554 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:05:38,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:05:38,555 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:05:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:05:38,555 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:05:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:05:38,555 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:05:38,555 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:05:38,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:05:38,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:05:38,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:05:38,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:05:38,557 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:05:38,700 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:05:38,702 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:05:39,042 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:05:39,044 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:05:39,172 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:05:39,172 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:05:39,173 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:05:39 BoogieIcfgContainer [2024-06-21 21:05:39,173 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:05:39,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:05:39,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:05:39,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:05:39,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:05:37" (1/4) ... [2024-06-21 21:05:39,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0066e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:05:39, skipping insertion in model container [2024-06-21 21:05:39,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:05:37" (2/4) ... [2024-06-21 21:05:39,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0066e0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:05:39, skipping insertion in model container [2024-06-21 21:05:39,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:05:38" (3/4) ... [2024-06-21 21:05:39,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0066e0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:05:39, skipping insertion in model container [2024-06-21 21:05:39,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:05:39" (4/4) ... [2024-06-21 21:05:39,181 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-21 21:05:39,194 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:05:39,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:05:39,194 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:05:39,233 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:05:39,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:05:39,278 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:05:39,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:05:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:05:39,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:05:39,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:05:39,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:05:39,293 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;@722187b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:05:39,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:05:39,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:05:39,296 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:05:39,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:05:39,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:39,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:05:39,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:39,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash 359771266, now seen corresponding path program 1 times [2024-06-21 21:05:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:39,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418609418] [2024-06-21 21:05:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418609418] [2024-06-21 21:05:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418609418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:40,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:05:40,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624338727] [2024-06-21 21:05:40,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:40,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:05:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:05:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:05:40,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 21:05:40,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:40,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:40,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 21:05:40,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:40,363 INFO L124 PetriNetUnfolderBase]: 1116/1816 cut-off events. [2024-06-21 21:05:40,363 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 21:05:40,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 1816 events. 1116/1816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9229 event pairs, 765 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 3555. Up to 1676 conditions per place. [2024-06-21 21:05:40,375 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 21:05:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-21 21:05:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:05:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:05:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-21 21:05:40,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 21:05:40,385 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-21 21:05:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-21 21:05:40,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:40,388 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:05:40,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:05:40,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:05:40,392 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:05:40,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:40,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:40,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:40,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:05:40,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:40,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2142835425, now seen corresponding path program 1 times [2024-06-21 21:05:40,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:40,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619970234] [2024-06-21 21:05:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:40,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:40,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619970234] [2024-06-21 21:05:40,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619970234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:40,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:40,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:05:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207250698] [2024-06-21 21:05:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:05:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:05:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:05:40,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 21:05:40,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:40,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:40,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 21:05:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:41,147 INFO L124 PetriNetUnfolderBase]: 1280/2007 cut-off events. [2024-06-21 21:05:41,147 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-21 21:05:41,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 2007 events. 1280/2007 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9937 event pairs, 750 based on Foata normal form. 3/1978 useless extension candidates. Maximal degree in co-relation 4516. Up to 1897 conditions per place. [2024-06-21 21:05:41,157 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 21:05:41,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-21 21:05:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:05:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:05:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 21:05:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 21:05:41,161 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-21 21:05:41,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-21 21:05:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:05:41,164 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:05:41,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:05:41,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:05:41,165 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:05:41,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:41,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:41,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:05:41,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:41,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2003389811, now seen corresponding path program 1 times [2024-06-21 21:05:41,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:41,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572464028] [2024-06-21 21:05:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:41,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:41,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:41,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572464028] [2024-06-21 21:05:41,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572464028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:41,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:41,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:05:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791904678] [2024-06-21 21:05:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:05:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:05:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:05:41,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 21:05:41,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 21:05:41,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:41,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 21:05:41,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:42,075 INFO L124 PetriNetUnfolderBase]: 1302/2076 cut-off events. [2024-06-21 21:05:42,076 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-21 21:05:42,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 2076 events. 1302/2076 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10481 event pairs, 470 based on Foata normal form. 7/2070 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-21 21:05:42,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 21:05:42,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 406 flow [2024-06-21 21:05:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:05:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:05:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 21:05:42,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 21:05:42,092 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 135 transitions. [2024-06-21 21:05:42,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 406 flow [2024-06-21 21:05:42,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:05:42,096 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 21:05:42,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 21:05:42,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 21:05:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 21:05:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 21:05:42,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:42,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:05:42,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:42,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1967601872, now seen corresponding path program 1 times [2024-06-21 21:05:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:42,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760823490] [2024-06-21 21:05:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760823490] [2024-06-21 21:05:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760823490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:05:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897931774] [2024-06-21 21:05:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:05:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:05:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:05:42,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 21:05:42,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:42,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:42,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 21:05:42,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:43,110 INFO L124 PetriNetUnfolderBase]: 1384/2220 cut-off events. [2024-06-21 21:05:43,111 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-21 21:05:43,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6579 conditions, 2220 events. 1384/2220 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11470 event pairs, 321 based on Foata normal form. 26/2231 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-21 21:05:43,122 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 18 changer transitions 0/88 dead transitions. [2024-06-21 21:05:43,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 523 flow [2024-06-21 21:05:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 21:05:43,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 21:05:43,124 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 158 transitions. [2024-06-21 21:05:43,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 523 flow [2024-06-21 21:05:43,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 21:05:43,127 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 285 flow [2024-06-21 21:05:43,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-21 21:05:43,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 21:05:43,128 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 285 flow [2024-06-21 21:05:43,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:43,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:43,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:43,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:05:43,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:43,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 529676278, now seen corresponding path program 1 times [2024-06-21 21:05:43,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:43,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685742519] [2024-06-21 21:05:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:43,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685742519] [2024-06-21 21:05:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685742519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:43,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:05:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108595062] [2024-06-21 21:05:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:05:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:43,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:05:43,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:05:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:05:43,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:43,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:43,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:05:43,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:44,113 INFO L124 PetriNetUnfolderBase]: 1204/2027 cut-off events. [2024-06-21 21:05:44,113 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-06-21 21:05:44,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 2027 events. 1204/2027 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10900 event pairs, 447 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 6339. Up to 1814 conditions per place. [2024-06-21 21:05:44,127 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-21 21:05:44,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 427 flow [2024-06-21 21:05:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:05:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:05:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 21:05:44,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:05:44,128 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 285 flow. Second operand 5 states and 105 transitions. [2024-06-21 21:05:44,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 427 flow [2024-06-21 21:05:44,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 383 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:44,137 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 265 flow [2024-06-21 21:05:44,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-21 21:05:44,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:05:44,139 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 265 flow [2024-06-21 21:05:44,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:05:44,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:44,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1948773619, now seen corresponding path program 1 times [2024-06-21 21:05:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942426889] [2024-06-21 21:05:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942426889] [2024-06-21 21:05:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942426889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:44,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:44,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899555856] [2024-06-21 21:05:44,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:44,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:44,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:44,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:44,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:44,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:44,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:45,353 INFO L124 PetriNetUnfolderBase]: 1386/2222 cut-off events. [2024-06-21 21:05:45,354 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2024-06-21 21:05:45,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 2222 events. 1386/2222 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11436 event pairs, 459 based on Foata normal form. 8/2214 useless extension candidates. Maximal degree in co-relation 7054. Up to 1943 conditions per place. [2024-06-21 21:05:45,366 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-21 21:05:45,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 505 flow [2024-06-21 21:05:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-21 21:05:45,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-21 21:05:45,368 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 265 flow. Second operand 6 states and 130 transitions. [2024-06-21 21:05:45,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 505 flow [2024-06-21 21:05:45,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 483 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:45,372 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 315 flow [2024-06-21 21:05:45,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 21:05:45,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 21:05:45,373 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 315 flow [2024-06-21 21:05:45,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:45,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:45,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:05:45,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:45,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:45,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2082191787, now seen corresponding path program 2 times [2024-06-21 21:05:45,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:45,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309031543] [2024-06-21 21:05:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:45,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309031543] [2024-06-21 21:05:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309031543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983867999] [2024-06-21 21:05:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:45,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:45,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:45,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:45,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:45,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:45,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:46,432 INFO L124 PetriNetUnfolderBase]: 1354/2151 cut-off events. [2024-06-21 21:05:46,432 INFO L125 PetriNetUnfolderBase]: For 5814/5818 co-relation queries the response was YES. [2024-06-21 21:05:46,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7152 conditions, 2151 events. 1354/2151 cut-off events. For 5814/5818 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10816 event pairs, 469 based on Foata normal form. 5/2136 useless extension candidates. Maximal degree in co-relation 7129. Up to 1895 conditions per place. [2024-06-21 21:05:46,445 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 46 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-21 21:05:46,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 491 flow [2024-06-21 21:05:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:05:46,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:05:46,448 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 315 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:05:46,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 491 flow [2024-06-21 21:05:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 462 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:46,453 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 334 flow [2024-06-21 21:05:46,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-21 21:05:46,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 21:05:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 334 flow [2024-06-21 21:05:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:46,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:05:46,455 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:46,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash -400245517, now seen corresponding path program 1 times [2024-06-21 21:05:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:46,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725596149] [2024-06-21 21:05:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:47,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725596149] [2024-06-21 21:05:47,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725596149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:47,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:47,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911166751] [2024-06-21 21:05:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:47,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:47,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:47,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:05:47,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 334 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:47,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:47,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:05:47,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:48,052 INFO L124 PetriNetUnfolderBase]: 1176/1972 cut-off events. [2024-06-21 21:05:48,052 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-21 21:05:48,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6560 conditions, 1972 events. 1176/1972 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10404 event pairs, 406 based on Foata normal form. 4/1961 useless extension candidates. Maximal degree in co-relation 6536. Up to 1742 conditions per place. [2024-06-21 21:05:48,062 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-21 21:05:48,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 577 flow [2024-06-21 21:05:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 21:05:48,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 21:05:48,063 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 334 flow. Second operand 8 states and 155 transitions. [2024-06-21 21:05:48,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 577 flow [2024-06-21 21:05:48,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 505 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:48,068 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 363 flow [2024-06-21 21:05:48,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:05:48,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:05:48,068 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 363 flow [2024-06-21 21:05:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:48,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:48,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:48,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:05:48,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:48,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash 275117078, now seen corresponding path program 1 times [2024-06-21 21:05:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97607244] [2024-06-21 21:05:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:48,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:48,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97607244] [2024-06-21 21:05:48,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97607244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:48,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:48,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:05:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398963271] [2024-06-21 21:05:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:48,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:05:48,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:05:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:05:48,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:05:48,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:48,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:48,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:05:48,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:48,923 INFO L124 PetriNetUnfolderBase]: 1173/1968 cut-off events. [2024-06-21 21:05:48,923 INFO L125 PetriNetUnfolderBase]: For 6995/6995 co-relation queries the response was YES. [2024-06-21 21:05:48,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6817 conditions, 1968 events. 1173/1968 cut-off events. For 6995/6995 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10371 event pairs, 420 based on Foata normal form. 1/1954 useless extension candidates. Maximal degree in co-relation 6790. Up to 1771 conditions per place. [2024-06-21 21:05:48,936 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 21:05:48,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 529 flow [2024-06-21 21:05:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:05:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:05:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-21 21:05:48,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:05:48,938 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 363 flow. Second operand 5 states and 100 transitions. [2024-06-21 21:05:48,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 529 flow [2024-06-21 21:05:48,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 494 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:48,943 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 378 flow [2024-06-21 21:05:48,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-21 21:05:48,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 21:05:48,944 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 378 flow [2024-06-21 21:05:48,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:48,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:48,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:48,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:05:48,945 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:48,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash -61304236, now seen corresponding path program 1 times [2024-06-21 21:05:48,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:48,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922621786] [2024-06-21 21:05:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:48,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:49,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922621786] [2024-06-21 21:05:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922621786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871125411] [2024-06-21 21:05:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:49,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:49,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:49,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:49,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:49,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:49,974 INFO L124 PetriNetUnfolderBase]: 1340/2159 cut-off events. [2024-06-21 21:05:49,975 INFO L125 PetriNetUnfolderBase]: For 9933/9933 co-relation queries the response was YES. [2024-06-21 21:05:49,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7967 conditions, 2159 events. 1340/2159 cut-off events. For 9933/9933 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11029 event pairs, 492 based on Foata normal form. 1/2158 useless extension candidates. Maximal degree in co-relation 7939. Up to 2009 conditions per place. [2024-06-21 21:05:49,987 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-21 21:05:49,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 560 flow [2024-06-21 21:05:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:05:49,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:05:49,988 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 378 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:05:49,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 560 flow [2024-06-21 21:05:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 75 transitions, 532 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:49,994 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 410 flow [2024-06-21 21:05:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-06-21 21:05:49,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:05:49,995 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 410 flow [2024-06-21 21:05:49,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:49,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:49,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:05:49,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:49,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:49,996 INFO L85 PathProgramCache]: Analyzing trace with hash 724269158, now seen corresponding path program 1 times [2024-06-21 21:05:49,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:49,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121962005] [2024-06-21 21:05:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:49,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:50,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121962005] [2024-06-21 21:05:50,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121962005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:50,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:50,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:50,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355641335] [2024-06-21 21:05:50,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:50,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:50,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:50,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:50,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:50,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:51,270 INFO L124 PetriNetUnfolderBase]: 1543/2451 cut-off events. [2024-06-21 21:05:51,270 INFO L125 PetriNetUnfolderBase]: For 16156/16156 co-relation queries the response was YES. [2024-06-21 21:05:51,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9805 conditions, 2451 events. 1543/2451 cut-off events. For 16156/16156 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12733 event pairs, 357 based on Foata normal form. 16/2458 useless extension candidates. Maximal degree in co-relation 9776. Up to 1728 conditions per place. [2024-06-21 21:05:51,283 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 23 changer transitions 0/103 dead transitions. [2024-06-21 21:05:51,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 760 flow [2024-06-21 21:05:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 21:05:51,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-21 21:05:51,284 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 410 flow. Second operand 7 states and 153 transitions. [2024-06-21 21:05:51,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 760 flow [2024-06-21 21:05:51,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 103 transitions, 722 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:51,291 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 450 flow [2024-06-21 21:05:51,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-21 21:05:51,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 21:05:51,292 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 450 flow [2024-06-21 21:05:51,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:51,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:51,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:05:51,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 727126118, now seen corresponding path program 2 times [2024-06-21 21:05:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:51,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990859521] [2024-06-21 21:05:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:51,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:51,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990859521] [2024-06-21 21:05:51,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990859521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:51,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:51,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:51,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988115386] [2024-06-21 21:05:51,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:51,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:51,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:51,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:52,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:52,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:52,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:52,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:52,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:52,588 INFO L124 PetriNetUnfolderBase]: 1581/2534 cut-off events. [2024-06-21 21:05:52,588 INFO L125 PetriNetUnfolderBase]: For 19059/19059 co-relation queries the response was YES. [2024-06-21 21:05:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10390 conditions, 2534 events. 1581/2534 cut-off events. For 19059/19059 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13431 event pairs, 510 based on Foata normal form. 24/2553 useless extension candidates. Maximal degree in co-relation 10360. Up to 2107 conditions per place. [2024-06-21 21:05:52,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-21 21:05:52,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 734 flow [2024-06-21 21:05:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:05:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:05:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 21:05:52,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-21 21:05:52,603 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 450 flow. Second operand 7 states and 150 transitions. [2024-06-21 21:05:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 734 flow [2024-06-21 21:05:52,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 702 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:52,612 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 498 flow [2024-06-21 21:05:52,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-06-21 21:05:52,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 21:05:52,613 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 498 flow [2024-06-21 21:05:52,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:52,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:52,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:52,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:05:52,614 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:52,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1911872075, now seen corresponding path program 1 times [2024-06-21 21:05:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:52,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630338280] [2024-06-21 21:05:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:53,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:53,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630338280] [2024-06-21 21:05:53,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630338280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:53,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:53,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:05:53,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397398713] [2024-06-21 21:05:53,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:05:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:05:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:05:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:53,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:53,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:53,754 INFO L124 PetriNetUnfolderBase]: 1616/2586 cut-off events. [2024-06-21 21:05:53,754 INFO L125 PetriNetUnfolderBase]: For 20300/20300 co-relation queries the response was YES. [2024-06-21 21:05:53,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10981 conditions, 2586 events. 1616/2586 cut-off events. For 20300/20300 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13607 event pairs, 587 based on Foata normal form. 1/2585 useless extension candidates. Maximal degree in co-relation 10949. Up to 2404 conditions per place. [2024-06-21 21:05:53,767 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-21 21:05:53,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 88 transitions, 724 flow [2024-06-21 21:05:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 21:05:53,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:05:53,769 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 498 flow. Second operand 6 states and 117 transitions. [2024-06-21 21:05:53,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 88 transitions, 724 flow [2024-06-21 21:05:53,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 88 transitions, 668 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:53,782 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 504 flow [2024-06-21 21:05:53,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-06-21 21:05:53,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 21:05:53,782 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 504 flow [2024-06-21 21:05:53,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:53,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:53,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:53,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:05:53,783 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:53,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash -732699134, now seen corresponding path program 1 times [2024-06-21 21:05:53,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:53,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919974931] [2024-06-21 21:05:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:54,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:54,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919974931] [2024-06-21 21:05:54,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919974931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:54,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:54,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771916075] [2024-06-21 21:05:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:54,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:54,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:54,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:54,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:54,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:55,465 INFO L124 PetriNetUnfolderBase]: 1644/2615 cut-off events. [2024-06-21 21:05:55,465 INFO L125 PetriNetUnfolderBase]: For 23278/23278 co-relation queries the response was YES. [2024-06-21 21:05:55,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11449 conditions, 2615 events. 1644/2615 cut-off events. For 23278/23278 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13667 event pairs, 544 based on Foata normal form. 4/2612 useless extension candidates. Maximal degree in co-relation 11416. Up to 2298 conditions per place. [2024-06-21 21:05:55,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 28 changer transitions 0/106 dead transitions. [2024-06-21 21:05:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 106 transitions, 823 flow [2024-06-21 21:05:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 21:05:55,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 21:05:55,478 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 504 flow. Second operand 8 states and 162 transitions. [2024-06-21 21:05:55,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 106 transitions, 823 flow [2024-06-21 21:05:55,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 783 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:55,489 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 590 flow [2024-06-21 21:05:55,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2024-06-21 21:05:55,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 21:05:55,489 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 590 flow [2024-06-21 21:05:55,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:55,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:55,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:05:55,490 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1910831412, now seen corresponding path program 2 times [2024-06-21 21:05:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:55,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949067459] [2024-06-21 21:05:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:56,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:56,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949067459] [2024-06-21 21:05:56,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949067459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:56,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:56,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765713484] [2024-06-21 21:05:56,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:56,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:56,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:56,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 590 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:56,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:56,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:56,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:57,114 INFO L124 PetriNetUnfolderBase]: 1636/2603 cut-off events. [2024-06-21 21:05:57,114 INFO L125 PetriNetUnfolderBase]: For 26739/26739 co-relation queries the response was YES. [2024-06-21 21:05:57,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11972 conditions, 2603 events. 1636/2603 cut-off events. For 26739/26739 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13636 event pairs, 542 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 11937. Up to 2286 conditions per place. [2024-06-21 21:05:57,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 34 changer transitions 0/113 dead transitions. [2024-06-21 21:05:57,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 955 flow [2024-06-21 21:05:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 21:05:57,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 21:05:57,129 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 590 flow. Second operand 8 states and 162 transitions. [2024-06-21 21:05:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 955 flow [2024-06-21 21:05:57,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 113 transitions, 872 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:57,144 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 685 flow [2024-06-21 21:05:57,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=685, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 21:05:57,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 21:05:57,144 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 685 flow [2024-06-21 21:05:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:57,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:57,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:05:57,145 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:57,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash -726204014, now seen corresponding path program 3 times [2024-06-21 21:05:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117858988] [2024-06-21 21:05:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:58,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117858988] [2024-06-21 21:05:58,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117858988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:58,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:58,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:58,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826001174] [2024-06-21 21:05:58,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:58,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:58,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:58,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:58,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:58,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:58,610 INFO L124 PetriNetUnfolderBase]: 1669/2673 cut-off events. [2024-06-21 21:05:58,610 INFO L125 PetriNetUnfolderBase]: For 30115/30115 co-relation queries the response was YES. [2024-06-21 21:05:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 2673 events. 1669/2673 cut-off events. For 30115/30115 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14145 event pairs, 447 based on Foata normal form. 4/2671 useless extension candidates. Maximal degree in co-relation 12500. Up to 2176 conditions per place. [2024-06-21 21:05:58,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 41 changer transitions 0/120 dead transitions. [2024-06-21 21:05:58,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1029 flow [2024-06-21 21:05:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 21:05:58,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-21 21:05:58,626 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 685 flow. Second operand 8 states and 166 transitions. [2024-06-21 21:05:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1029 flow [2024-06-21 21:05:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 120 transitions, 965 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:58,642 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 767 flow [2024-06-21 21:05:58,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=767, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2024-06-21 21:05:58,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:05:58,643 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 767 flow [2024-06-21 21:05:58,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:58,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:58,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:05:58,644 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:58,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1618858255, now seen corresponding path program 2 times [2024-06-21 21:05:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:58,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029615987] [2024-06-21 21:05:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029615987] [2024-06-21 21:05:59,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029615987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:59,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:59,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:05:59,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340204112] [2024-06-21 21:05:59,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:05:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:05:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:05:59,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:59,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:59,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:59,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:59,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:59,573 INFO L124 PetriNetUnfolderBase]: 1666/2683 cut-off events. [2024-06-21 21:05:59,573 INFO L125 PetriNetUnfolderBase]: For 33076/33079 co-relation queries the response was YES. [2024-06-21 21:05:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12829 conditions, 2683 events. 1666/2683 cut-off events. For 33076/33079 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14315 event pairs, 547 based on Foata normal form. 3/2683 useless extension candidates. Maximal degree in co-relation 12790. Up to 2484 conditions per place. [2024-06-21 21:05:59,585 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 80 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2024-06-21 21:05:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 1021 flow [2024-06-21 21:05:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:05:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:05:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 21:05:59,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 21:05:59,587 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 767 flow. Second operand 6 states and 113 transitions. [2024-06-21 21:05:59,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 1021 flow [2024-06-21 21:05:59,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 931 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:59,605 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 759 flow [2024-06-21 21:05:59,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=759, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-06-21 21:05:59,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 21:05:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 759 flow [2024-06-21 21:05:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:59,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:59,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:05:59,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:59,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash -436868647, now seen corresponding path program 1 times [2024-06-21 21:05:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:59,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128196553] [2024-06-21 21:05:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:00,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128196553] [2024-06-21 21:06:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128196553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:00,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:00,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545581910] [2024-06-21 21:06:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:00,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:06:00,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 759 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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) [2024-06-21 21:06:00,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:00,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:06:00,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:00,616 INFO L124 PetriNetUnfolderBase]: 1506/2503 cut-off events. [2024-06-21 21:06:00,616 INFO L125 PetriNetUnfolderBase]: For 31762/31762 co-relation queries the response was YES. [2024-06-21 21:06:00,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11868 conditions, 2503 events. 1506/2503 cut-off events. For 31762/31762 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13731 event pairs, 473 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 11828. Up to 2262 conditions per place. [2024-06-21 21:06:00,628 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 12 changer transitions 0/109 dead transitions. [2024-06-21 21:06:00,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 1019 flow [2024-06-21 21:06:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:06:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:06:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 21:06:00,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:06:00,630 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 759 flow. Second operand 6 states and 120 transitions. [2024-06-21 21:06:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 1019 flow [2024-06-21 21:06:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 959 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:00,645 INFO L231 Difference]: Finished difference. Result has 96 places, 97 transitions, 759 flow [2024-06-21 21:06:00,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=759, PETRI_PLACES=96, PETRI_TRANSITIONS=97} [2024-06-21 21:06:00,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 21:06:00,645 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 97 transitions, 759 flow [2024-06-21 21:06:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 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) [2024-06-21 21:06:00,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:00,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:06:00,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:00,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -930741233, now seen corresponding path program 2 times [2024-06-21 21:06:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450094943] [2024-06-21 21:06:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450094943] [2024-06-21 21:06:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450094943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:06:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915743537] [2024-06-21 21:06:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:06:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:06:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:06:01,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:06:01,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 97 transitions, 759 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:01,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:01,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:06:01,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:01,645 INFO L124 PetriNetUnfolderBase]: 1508/2509 cut-off events. [2024-06-21 21:06:01,645 INFO L125 PetriNetUnfolderBase]: For 34796/34799 co-relation queries the response was YES. [2024-06-21 21:06:01,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12281 conditions, 2509 events. 1508/2509 cut-off events. For 34796/34799 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13792 event pairs, 477 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 12240. Up to 2256 conditions per place. [2024-06-21 21:06:01,658 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-21 21:06:01,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 110 transitions, 1025 flow [2024-06-21 21:06:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:06:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:06:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 21:06:01,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:06:01,659 INFO L175 Difference]: Start difference. First operand has 96 places, 97 transitions, 759 flow. Second operand 6 states and 120 transitions. [2024-06-21 21:06:01,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 110 transitions, 1025 flow [2024-06-21 21:06:01,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 987 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:01,676 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 797 flow [2024-06-21 21:06:01,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=797, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-06-21 21:06:01,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 21:06:01,677 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 797 flow [2024-06-21 21:06:01,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:01,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:01,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:06:01,678 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:01,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash -930733297, now seen corresponding path program 1 times [2024-06-21 21:06:01,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:01,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008183029] [2024-06-21 21:06:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:02,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:02,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008183029] [2024-06-21 21:06:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008183029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:02,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:02,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:02,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76783078] [2024-06-21 21:06:02,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:02,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:02,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:02,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 797 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:02,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:02,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:02,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:02,776 INFO L124 PetriNetUnfolderBase]: 1590/2589 cut-off events. [2024-06-21 21:06:02,776 INFO L125 PetriNetUnfolderBase]: For 37623/37623 co-relation queries the response was YES. [2024-06-21 21:06:02,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13037 conditions, 2589 events. 1590/2589 cut-off events. For 37623/37623 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13865 event pairs, 500 based on Foata normal form. 1/2588 useless extension candidates. Maximal degree in co-relation 12995. Up to 2426 conditions per place. [2024-06-21 21:06:02,789 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-21 21:06:02,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 112 transitions, 1067 flow [2024-06-21 21:06:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:06:02,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:06:02,790 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 797 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:06:02,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 112 transitions, 1067 flow [2024-06-21 21:06:02,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 112 transitions, 1013 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:02,809 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 821 flow [2024-06-21 21:06:02,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=821, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-21 21:06:02,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 21:06:02,810 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 821 flow [2024-06-21 21:06:02,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:02,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:02,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:02,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:06:02,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:02,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:02,811 INFO L85 PathProgramCache]: Analyzing trace with hash 861209855, now seen corresponding path program 1 times [2024-06-21 21:06:02,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:02,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849634546] [2024-06-21 21:06:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:02,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:03,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849634546] [2024-06-21 21:06:03,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849634546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:03,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:03,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:03,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299169490] [2024-06-21 21:06:03,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:03,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:03,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:03,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:03,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:03,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 821 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:03,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:03,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:03,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:03,862 INFO L124 PetriNetUnfolderBase]: 1687/2721 cut-off events. [2024-06-21 21:06:03,862 INFO L125 PetriNetUnfolderBase]: For 48378/48381 co-relation queries the response was YES. [2024-06-21 21:06:03,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14463 conditions, 2721 events. 1687/2721 cut-off events. For 48378/48381 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14526 event pairs, 536 based on Foata normal form. 5/2723 useless extension candidates. Maximal degree in co-relation 14420. Up to 2449 conditions per place. [2024-06-21 21:06:03,877 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-21 21:06:03,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1199 flow [2024-06-21 21:06:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 21:06:03,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 21:06:03,878 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 821 flow. Second operand 7 states and 144 transitions. [2024-06-21 21:06:03,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1199 flow [2024-06-21 21:06:03,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 132 transitions, 1143 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:03,899 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 907 flow [2024-06-21 21:06:03,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-21 21:06:03,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 21:06:03,899 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 907 flow [2024-06-21 21:06:03,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:03,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:03,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:03,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:06:03,900 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:03,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash 350858266, now seen corresponding path program 1 times [2024-06-21 21:06:03,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:03,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892485416] [2024-06-21 21:06:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:04,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892485416] [2024-06-21 21:06:04,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892485416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:04,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:04,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237898471] [2024-06-21 21:06:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:04,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:04,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 907 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:04,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:04,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:04,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:05,573 INFO L124 PetriNetUnfolderBase]: 1797/2920 cut-off events. [2024-06-21 21:06:05,573 INFO L125 PetriNetUnfolderBase]: For 55301/55301 co-relation queries the response was YES. [2024-06-21 21:06:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15977 conditions, 2920 events. 1797/2920 cut-off events. For 55301/55301 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16076 event pairs, 546 based on Foata normal form. 12/2927 useless extension candidates. Maximal degree in co-relation 15932. Up to 2271 conditions per place. [2024-06-21 21:06:05,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 38 changer transitions 0/147 dead transitions. [2024-06-21 21:06:05,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1337 flow [2024-06-21 21:06:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 21:06:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-21 21:06:05,593 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 907 flow. Second operand 8 states and 167 transitions. [2024-06-21 21:06:05,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1337 flow [2024-06-21 21:06:05,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 147 transitions, 1266 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:05,620 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 987 flow [2024-06-21 21:06:05,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-06-21 21:06:05,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 21:06:05,620 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 987 flow [2024-06-21 21:06:05,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:05,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:05,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:05,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:06:05,621 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:05,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 861508385, now seen corresponding path program 2 times [2024-06-21 21:06:05,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:05,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642514454] [2024-06-21 21:06:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:05,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:06,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:06,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642514454] [2024-06-21 21:06:06,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642514454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:06,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:06,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:06,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610846089] [2024-06-21 21:06:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:06,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:06,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:06,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:06,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 987 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:06,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:06,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:06,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:06,883 INFO L124 PetriNetUnfolderBase]: 1848/3006 cut-off events. [2024-06-21 21:06:06,883 INFO L125 PetriNetUnfolderBase]: For 60080/60083 co-relation queries the response was YES. [2024-06-21 21:06:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16854 conditions, 3006 events. 1848/3006 cut-off events. For 60080/60083 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16714 event pairs, 562 based on Foata normal form. 5/3008 useless extension candidates. Maximal degree in co-relation 16808. Up to 2662 conditions per place. [2024-06-21 21:06:06,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 30 changer transitions 0/141 dead transitions. [2024-06-21 21:06:06,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 141 transitions, 1457 flow [2024-06-21 21:06:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 21:06:06,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 21:06:06,903 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 987 flow. Second operand 7 states and 141 transitions. [2024-06-21 21:06:06,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 141 transitions, 1457 flow [2024-06-21 21:06:06,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 141 transitions, 1405 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:06,935 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 1127 flow [2024-06-21 21:06:06,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-21 21:06:06,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 21:06:06,935 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 1127 flow [2024-06-21 21:06:06,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:06,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:06,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:06,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:06:06,936 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:06,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1344825595, now seen corresponding path program 1 times [2024-06-21 21:06:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:06,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347979219] [2024-06-21 21:06:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347979219] [2024-06-21 21:06:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347979219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:07,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329366960] [2024-06-21 21:06:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:07,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 1127 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:07,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:07,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:07,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:08,069 INFO L124 PetriNetUnfolderBase]: 1938/3097 cut-off events. [2024-06-21 21:06:08,069 INFO L125 PetriNetUnfolderBase]: For 66539/66539 co-relation queries the response was YES. [2024-06-21 21:06:08,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18095 conditions, 3097 events. 1938/3097 cut-off events. For 66539/66539 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16866 event pairs, 590 based on Foata normal form. 1/3096 useless extension candidates. Maximal degree in co-relation 18047. Up to 2939 conditions per place. [2024-06-21 21:06:08,085 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2024-06-21 21:06:08,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 1487 flow [2024-06-21 21:06:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:06:08,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:06:08,086 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 1127 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:06:08,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 1487 flow [2024-06-21 21:06:08,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 141 transitions, 1416 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:08,127 INFO L231 Difference]: Finished difference. Result has 118 places, 126 transitions, 1146 flow [2024-06-21 21:06:08,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=118, PETRI_TRANSITIONS=126} [2024-06-21 21:06:08,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:06:08,128 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 126 transitions, 1146 flow [2024-06-21 21:06:08,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:08,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:08,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:06:08,128 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:08,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1531132156, now seen corresponding path program 2 times [2024-06-21 21:06:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:08,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619331857] [2024-06-21 21:06:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:09,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619331857] [2024-06-21 21:06:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619331857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:09,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:09,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:09,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275532150] [2024-06-21 21:06:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:09,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:09,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:09,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:09,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:09,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 126 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:09,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:09,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:09,757 INFO L124 PetriNetUnfolderBase]: 1843/2990 cut-off events. [2024-06-21 21:06:09,757 INFO L125 PetriNetUnfolderBase]: For 71778/71778 co-relation queries the response was YES. [2024-06-21 21:06:09,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17767 conditions, 2990 events. 1843/2990 cut-off events. For 71778/71778 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16476 event pairs, 347 based on Foata normal form. 12/2997 useless extension candidates. Maximal degree in co-relation 17717. Up to 1909 conditions per place. [2024-06-21 21:06:09,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-21 21:06:09,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 1540 flow [2024-06-21 21:06:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 21:06:09,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-21 21:06:09,779 INFO L175 Difference]: Start difference. First operand has 118 places, 126 transitions, 1146 flow. Second operand 7 states and 150 transitions. [2024-06-21 21:06:09,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 1540 flow [2024-06-21 21:06:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1466 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:09,825 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1163 flow [2024-06-21 21:06:09,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1163, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2024-06-21 21:06:09,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 21:06:09,826 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1163 flow [2024-06-21 21:06:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:09,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:09,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:09,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:06:09,827 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:09,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2027480738, now seen corresponding path program 3 times [2024-06-21 21:06:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121715604] [2024-06-21 21:06:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:10,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:10,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121715604] [2024-06-21 21:06:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121715604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887117469] [2024-06-21 21:06:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:10,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:10,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:10,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:10,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:10,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:11,335 INFO L124 PetriNetUnfolderBase]: 1823/2958 cut-off events. [2024-06-21 21:06:11,335 INFO L125 PetriNetUnfolderBase]: For 74525/74525 co-relation queries the response was YES. [2024-06-21 21:06:11,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 2958 events. 1823/2958 cut-off events. For 74525/74525 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16266 event pairs, 308 based on Foata normal form. 12/2960 useless extension candidates. Maximal degree in co-relation 17720. Up to 1767 conditions per place. [2024-06-21 21:06:11,355 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 103 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2024-06-21 21:06:11,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 150 transitions, 1503 flow [2024-06-21 21:06:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 21:06:11,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 21:06:11,357 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1163 flow. Second operand 7 states and 142 transitions. [2024-06-21 21:06:11,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 150 transitions, 1503 flow [2024-06-21 21:06:11,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 150 transitions, 1397 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:11,392 INFO L231 Difference]: Finished difference. Result has 120 places, 125 transitions, 1107 flow [2024-06-21 21:06:11,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1107, PETRI_PLACES=120, PETRI_TRANSITIONS=125} [2024-06-21 21:06:11,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 21:06:11,393 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 125 transitions, 1107 flow [2024-06-21 21:06:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:11,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:11,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:11,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:06:11,393 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:11,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771797, now seen corresponding path program 2 times [2024-06-21 21:06:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:11,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049475875] [2024-06-21 21:06:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:11,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:12,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049475875] [2024-06-21 21:06:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049475875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:12,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:12,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:12,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496995603] [2024-06-21 21:06:12,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:12,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 125 transitions, 1107 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:12,557 INFO L124 PetriNetUnfolderBase]: 1903/3041 cut-off events. [2024-06-21 21:06:12,557 INFO L125 PetriNetUnfolderBase]: For 70990/70996 co-relation queries the response was YES. [2024-06-21 21:06:12,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3041 events. 1903/3041 cut-off events. For 70990/70996 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16457 event pairs, 568 based on Foata normal form. 5/3043 useless extension candidates. Maximal degree in co-relation 18042. Up to 2866 conditions per place. [2024-06-21 21:06:12,576 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-21 21:06:12,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 142 transitions, 1567 flow [2024-06-21 21:06:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:06:12,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:06:12,578 INFO L175 Difference]: Start difference. First operand has 120 places, 125 transitions, 1107 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:06:12,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 142 transitions, 1567 flow [2024-06-21 21:06:12,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 142 transitions, 1456 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:12,615 INFO L231 Difference]: Finished difference. Result has 121 places, 131 transitions, 1168 flow [2024-06-21 21:06:12,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1168, PETRI_PLACES=121, PETRI_TRANSITIONS=131} [2024-06-21 21:06:12,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 21:06:12,616 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 131 transitions, 1168 flow [2024-06-21 21:06:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:12,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:12,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:12,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:06:12,616 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:12,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771425, now seen corresponding path program 3 times [2024-06-21 21:06:12,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:12,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490853627] [2024-06-21 21:06:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:12,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:13,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:13,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490853627] [2024-06-21 21:06:13,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490853627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:13,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:13,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:13,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537815280] [2024-06-21 21:06:13,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:13,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:13,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:13,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:13,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 131 transitions, 1168 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:13,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:13,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:13,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:13,830 INFO L124 PetriNetUnfolderBase]: 1855/3010 cut-off events. [2024-06-21 21:06:13,830 INFO L125 PetriNetUnfolderBase]: For 77871/77874 co-relation queries the response was YES. [2024-06-21 21:06:13,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18053 conditions, 3010 events. 1855/3010 cut-off events. For 77871/77874 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16625 event pairs, 564 based on Foata normal form. 5/3007 useless extension candidates. Maximal degree in co-relation 18001. Up to 2598 conditions per place. [2024-06-21 21:06:13,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 42 changer transitions 0/154 dead transitions. [2024-06-21 21:06:13,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 154 transitions, 1738 flow [2024-06-21 21:06:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 21:06:13,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-21 21:06:13,849 INFO L175 Difference]: Start difference. First operand has 121 places, 131 transitions, 1168 flow. Second operand 7 states and 139 transitions. [2024-06-21 21:06:13,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 154 transitions, 1738 flow [2024-06-21 21:06:13,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 154 transitions, 1666 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:13,890 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1332 flow [2024-06-21 21:06:13,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1332, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2024-06-21 21:06:13,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 21:06:13,891 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1332 flow [2024-06-21 21:06:13,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:13,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:13,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:06:13,891 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:13,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1216187507, now seen corresponding path program 3 times [2024-06-21 21:06:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018902257] [2024-06-21 21:06:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:14,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:14,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018902257] [2024-06-21 21:06:14,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018902257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:14,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232277504] [2024-06-21 21:06:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:14,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:14,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:14,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 139 transitions, 1332 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:14,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:14,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:15,004 INFO L124 PetriNetUnfolderBase]: 1927/3081 cut-off events. [2024-06-21 21:06:15,004 INFO L125 PetriNetUnfolderBase]: For 84491/84497 co-relation queries the response was YES. [2024-06-21 21:06:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19253 conditions, 3081 events. 1927/3081 cut-off events. For 84491/84497 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16712 event pairs, 574 based on Foata normal form. 5/3083 useless extension candidates. Maximal degree in co-relation 19198. Up to 2901 conditions per place. [2024-06-21 21:06:15,024 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 117 selfloop transitions, 27 changer transitions 0/149 dead transitions. [2024-06-21 21:06:15,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1646 flow [2024-06-21 21:06:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:06:15,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:06:15,025 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1332 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:06:15,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1646 flow [2024-06-21 21:06:15,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 149 transitions, 1472 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:15,071 INFO L231 Difference]: Finished difference. Result has 129 places, 139 transitions, 1218 flow [2024-06-21 21:06:15,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1218, PETRI_PLACES=129, PETRI_TRANSITIONS=139} [2024-06-21 21:06:15,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 21:06:15,072 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 139 transitions, 1218 flow [2024-06-21 21:06:15,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:15,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:15,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:06:15,073 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:15,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:15,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1038819953, now seen corresponding path program 1 times [2024-06-21 21:06:15,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:15,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462989382] [2024-06-21 21:06:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:15,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462989382] [2024-06-21 21:06:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462989382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:15,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:15,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:15,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761676379] [2024-06-21 21:06:15,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:15,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:06:15,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 139 transitions, 1218 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:15,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:15,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:06:15,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:16,415 INFO L124 PetriNetUnfolderBase]: 1663/2809 cut-off events. [2024-06-21 21:06:16,415 INFO L125 PetriNetUnfolderBase]: For 75178/75178 co-relation queries the response was YES. [2024-06-21 21:06:16,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16627 conditions, 2809 events. 1663/2809 cut-off events. For 75178/75178 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16076 event pairs, 459 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 16571. Up to 2500 conditions per place. [2024-06-21 21:06:16,432 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-06-21 21:06:16,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 157 transitions, 1594 flow [2024-06-21 21:06:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 21:06:16,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 21:06:16,433 INFO L175 Difference]: Start difference. First operand has 129 places, 139 transitions, 1218 flow. Second operand 7 states and 137 transitions. [2024-06-21 21:06:16,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 157 transitions, 1594 flow [2024-06-21 21:06:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1532 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:16,480 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1244 flow [2024-06-21 21:06:16,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=130, PETRI_TRANSITIONS=142} [2024-06-21 21:06:16,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 21:06:16,481 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1244 flow [2024-06-21 21:06:16,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:16,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:16,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:06:16,481 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:16,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1038824789, now seen corresponding path program 1 times [2024-06-21 21:06:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:16,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899967643] [2024-06-21 21:06:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899967643] [2024-06-21 21:06:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899967643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:17,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503132536] [2024-06-21 21:06:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:17,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:17,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 142 transitions, 1244 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:17,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:17,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:17,678 INFO L124 PetriNetUnfolderBase]: 1767/2919 cut-off events. [2024-06-21 21:06:17,678 INFO L125 PetriNetUnfolderBase]: For 80330/80330 co-relation queries the response was YES. [2024-06-21 21:06:17,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17531 conditions, 2919 events. 1767/2919 cut-off events. For 80330/80330 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16369 event pairs, 498 based on Foata normal form. 2/2919 useless extension candidates. Maximal degree in co-relation 17474. Up to 2683 conditions per place. [2024-06-21 21:06:17,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 15 changer transitions 0/159 dead transitions. [2024-06-21 21:06:17,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 159 transitions, 1638 flow [2024-06-21 21:06:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 21:06:17,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 21:06:17,699 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1244 flow. Second operand 7 states and 130 transitions. [2024-06-21 21:06:17,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 159 transitions, 1638 flow [2024-06-21 21:06:17,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 159 transitions, 1572 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:17,741 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1262 flow [2024-06-21 21:06:17,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1262, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-21 21:06:17,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 21:06:17,741 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1262 flow [2024-06-21 21:06:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:17,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:17,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:17,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:06:17,742 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:17,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1216193459, now seen corresponding path program 2 times [2024-06-21 21:06:17,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:17,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655696931] [2024-06-21 21:06:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655696931] [2024-06-21 21:06:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655696931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:18,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811500265] [2024-06-21 21:06:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:18,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:18,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1262 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:18,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:18,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:18,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:18,902 INFO L124 PetriNetUnfolderBase]: 1785/2929 cut-off events. [2024-06-21 21:06:18,903 INFO L125 PetriNetUnfolderBase]: For 83820/83823 co-relation queries the response was YES. [2024-06-21 21:06:18,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18139 conditions, 2929 events. 1785/2929 cut-off events. For 83820/83823 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16327 event pairs, 502 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 18081. Up to 2679 conditions per place. [2024-06-21 21:06:18,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-21 21:06:18,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 164 transitions, 1782 flow [2024-06-21 21:06:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:06:18,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 21:06:18,924 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1262 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:06:18,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 164 transitions, 1782 flow [2024-06-21 21:06:18,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 164 transitions, 1720 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:18,983 INFO L231 Difference]: Finished difference. Result has 134 places, 151 transitions, 1364 flow [2024-06-21 21:06:18,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1364, PETRI_PLACES=134, PETRI_TRANSITIONS=151} [2024-06-21 21:06:18,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 21:06:18,983 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 151 transitions, 1364 flow [2024-06-21 21:06:18,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:18,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:18,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:18,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:06:18,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:18,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1215956309, now seen corresponding path program 3 times [2024-06-21 21:06:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:18,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835410352] [2024-06-21 21:06:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:19,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:19,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835410352] [2024-06-21 21:06:19,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835410352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:19,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:19,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:19,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860085968] [2024-06-21 21:06:19,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:19,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:19,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:19,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 151 transitions, 1364 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:19,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:19,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:19,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:20,150 INFO L124 PetriNetUnfolderBase]: 1779/2923 cut-off events. [2024-06-21 21:06:20,150 INFO L125 PetriNetUnfolderBase]: For 88797/88800 co-relation queries the response was YES. [2024-06-21 21:06:20,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18439 conditions, 2923 events. 1779/2923 cut-off events. For 88797/88800 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16309 event pairs, 504 based on Foata normal form. 4/2924 useless extension candidates. Maximal degree in co-relation 18380. Up to 2674 conditions per place. [2024-06-21 21:06:20,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-21 21:06:20,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 163 transitions, 1724 flow [2024-06-21 21:06:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:06:20,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 21:06:20,172 INFO L175 Difference]: Start difference. First operand has 134 places, 151 transitions, 1364 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:06:20,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 163 transitions, 1724 flow [2024-06-21 21:06:20,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 163 transitions, 1633 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:20,233 INFO L231 Difference]: Finished difference. Result has 138 places, 151 transitions, 1333 flow [2024-06-21 21:06:20,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=138, PETRI_TRANSITIONS=151} [2024-06-21 21:06:20,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 21:06:20,234 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 151 transitions, 1333 flow [2024-06-21 21:06:20,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:20,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:20,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:06:20,234 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:20,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 927702667, now seen corresponding path program 1 times [2024-06-21 21:06:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698412854] [2024-06-21 21:06:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:20,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:20,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698412854] [2024-06-21 21:06:20,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698412854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:20,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:20,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:20,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380978372] [2024-06-21 21:06:20,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:20,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:20,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:20,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:20,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 1333 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:20,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:20,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:20,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:21,505 INFO L124 PetriNetUnfolderBase]: 1961/3131 cut-off events. [2024-06-21 21:06:21,505 INFO L125 PetriNetUnfolderBase]: For 111111/111114 co-relation queries the response was YES. [2024-06-21 21:06:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20584 conditions, 3131 events. 1961/3131 cut-off events. For 111111/111114 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17084 event pairs, 573 based on Foata normal form. 5/3133 useless extension candidates. Maximal degree in co-relation 20523. Up to 2885 conditions per place. [2024-06-21 21:06:21,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 145 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-21 21:06:21,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 179 transitions, 1825 flow [2024-06-21 21:06:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:06:21,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:06:21,528 INFO L175 Difference]: Start difference. First operand has 138 places, 151 transitions, 1333 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:06:21,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 179 transitions, 1825 flow [2024-06-21 21:06:21,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 179 transitions, 1751 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:21,586 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1400 flow [2024-06-21 21:06:21,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-21 21:06:21,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 21:06:21,586 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1400 flow [2024-06-21 21:06:21,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:21,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:21,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:21,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:06:21,587 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:21,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:21,587 INFO L85 PathProgramCache]: Analyzing trace with hash 931246804, now seen corresponding path program 1 times [2024-06-21 21:06:21,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:21,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007398543] [2024-06-21 21:06:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:21,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:22,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:22,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007398543] [2024-06-21 21:06:22,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007398543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:22,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:22,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:22,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327039037] [2024-06-21 21:06:22,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:22,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:22,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:22,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1400 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:22,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:22,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:22,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:22,780 INFO L124 PetriNetUnfolderBase]: 1924/3106 cut-off events. [2024-06-21 21:06:22,780 INFO L125 PetriNetUnfolderBase]: For 120723/120726 co-relation queries the response was YES. [2024-06-21 21:06:22,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21220 conditions, 3106 events. 1924/3106 cut-off events. For 120723/120726 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17220 event pairs, 547 based on Foata normal form. 6/3109 useless extension candidates. Maximal degree in co-relation 21158. Up to 2774 conditions per place. [2024-06-21 21:06:22,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-06-21 21:06:22,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 178 transitions, 1839 flow [2024-06-21 21:06:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 21:06:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:06:22,804 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1400 flow. Second operand 7 states and 140 transitions. [2024-06-21 21:06:22,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 178 transitions, 1839 flow [2024-06-21 21:06:22,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 178 transitions, 1726 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:22,868 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1405 flow [2024-06-21 21:06:22,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1405, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-06-21 21:06:22,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 21:06:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1405 flow [2024-06-21 21:06:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:22,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:06:22,869 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1336684874, now seen corresponding path program 2 times [2024-06-21 21:06:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529649835] [2024-06-21 21:06:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529649835] [2024-06-21 21:06:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529649835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:23,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:23,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336277627] [2024-06-21 21:06:23,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:23,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:23,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:23,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1405 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:23,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:23,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:23,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:24,053 INFO L124 PetriNetUnfolderBase]: 1926/3114 cut-off events. [2024-06-21 21:06:24,054 INFO L125 PetriNetUnfolderBase]: For 125613/125616 co-relation queries the response was YES. [2024-06-21 21:06:24,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21339 conditions, 3114 events. 1926/3114 cut-off events. For 125613/125616 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17299 event pairs, 546 based on Foata normal form. 6/3117 useless extension candidates. Maximal degree in co-relation 21276. Up to 2723 conditions per place. [2024-06-21 21:06:24,076 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 36 changer transitions 0/180 dead transitions. [2024-06-21 21:06:24,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 180 transitions, 1917 flow [2024-06-21 21:06:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 21:06:24,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:06:24,077 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1405 flow. Second operand 7 states and 140 transitions. [2024-06-21 21:06:24,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 180 transitions, 1917 flow [2024-06-21 21:06:24,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 180 transitions, 1856 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:24,145 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1481 flow [2024-06-21 21:06:24,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1481, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-21 21:06:24,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 21:06:24,146 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1481 flow [2024-06-21 21:06:24,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:24,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:24,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:24,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:06:24,146 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:24,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:24,147 INFO L85 PathProgramCache]: Analyzing trace with hash 936957097, now seen corresponding path program 2 times [2024-06-21 21:06:24,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:24,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432863751] [2024-06-21 21:06:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:24,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432863751] [2024-06-21 21:06:24,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432863751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:24,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:24,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:24,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379313007] [2024-06-21 21:06:24,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:24,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:24,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:24,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:24,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1481 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:24,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:24,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:24,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:25,420 INFO L124 PetriNetUnfolderBase]: 2060/3285 cut-off events. [2024-06-21 21:06:25,420 INFO L125 PetriNetUnfolderBase]: For 135115/135118 co-relation queries the response was YES. [2024-06-21 21:06:25,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22776 conditions, 3285 events. 2060/3285 cut-off events. For 135115/135118 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18095 event pairs, 574 based on Foata normal form. 5/3287 useless extension candidates. Maximal degree in co-relation 22712. Up to 2884 conditions per place. [2024-06-21 21:06:25,442 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 49 changer transitions 0/195 dead transitions. [2024-06-21 21:06:25,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 195 transitions, 2293 flow [2024-06-21 21:06:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:06:25,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:06:25,443 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1481 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:06:25,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 195 transitions, 2293 flow [2024-06-21 21:06:25,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 195 transitions, 2206 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:25,523 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1758 flow [2024-06-21 21:06:25,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1758, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-21 21:06:25,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:06:25,524 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1758 flow [2024-06-21 21:06:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:25,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:25,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:06:25,524 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:25,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1260078546, now seen corresponding path program 1 times [2024-06-21 21:06:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818929088] [2024-06-21 21:06:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:26,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818929088] [2024-06-21 21:06:26,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818929088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:26,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:26,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551290101] [2024-06-21 21:06:26,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:26,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:26,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:26,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1758 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:26,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:26,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:26,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:26,770 INFO L124 PetriNetUnfolderBase]: 2065/3289 cut-off events. [2024-06-21 21:06:26,770 INFO L125 PetriNetUnfolderBase]: For 144511/144511 co-relation queries the response was YES. [2024-06-21 21:06:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23673 conditions, 3289 events. 2065/3289 cut-off events. For 144511/144511 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18055 event pairs, 582 based on Foata normal form. 1/3288 useless extension candidates. Maximal degree in co-relation 23607. Up to 3106 conditions per place. [2024-06-21 21:06:26,794 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-21 21:06:26,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2240 flow [2024-06-21 21:06:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:06:26,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:06:26,795 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1758 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:06:26,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2240 flow [2024-06-21 21:06:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 193 transitions, 2123 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:26,889 INFO L231 Difference]: Finished difference. Result has 155 places, 177 transitions, 1753 flow [2024-06-21 21:06:26,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1753, PETRI_PLACES=155, PETRI_TRANSITIONS=177} [2024-06-21 21:06:26,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 21:06:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 177 transitions, 1753 flow [2024-06-21 21:06:26,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:26,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:26,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:06:26,891 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1336677341, now seen corresponding path program 3 times [2024-06-21 21:06:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544315414] [2024-06-21 21:06:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544315414] [2024-06-21 21:06:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544315414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:27,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:27,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041607288] [2024-06-21 21:06:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:27,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:27,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:27,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 177 transitions, 1753 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:27,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:27,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:27,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:28,146 INFO L124 PetriNetUnfolderBase]: 2060/3286 cut-off events. [2024-06-21 21:06:28,146 INFO L125 PetriNetUnfolderBase]: For 146017/146020 co-relation queries the response was YES. [2024-06-21 21:06:28,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23689 conditions, 3286 events. 2060/3286 cut-off events. For 146017/146020 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18020 event pairs, 568 based on Foata normal form. 5/3288 useless extension candidates. Maximal degree in co-relation 23621. Up to 2889 conditions per place. [2024-06-21 21:06:28,175 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 145 selfloop transitions, 48 changer transitions 0/198 dead transitions. [2024-06-21 21:06:28,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 198 transitions, 2357 flow [2024-06-21 21:06:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:06:28,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:06:28,177 INFO L175 Difference]: Start difference. First operand has 155 places, 177 transitions, 1753 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:06:28,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 198 transitions, 2357 flow [2024-06-21 21:06:28,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 2219 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:28,258 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1719 flow [2024-06-21 21:06:28,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1719, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-21 21:06:28,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:06:28,259 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1719 flow [2024-06-21 21:06:28,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:28,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:28,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:06:28,259 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:28,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash -857379116, now seen corresponding path program 3 times [2024-06-21 21:06:28,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:28,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503739226] [2024-06-21 21:06:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:28,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:28,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503739226] [2024-06-21 21:06:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503739226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:28,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15199470] [2024-06-21 21:06:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:28,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:28,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1719 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:28,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:28,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:29,538 INFO L124 PetriNetUnfolderBase]: 2047/3294 cut-off events. [2024-06-21 21:06:29,538 INFO L125 PetriNetUnfolderBase]: For 154756/154756 co-relation queries the response was YES. [2024-06-21 21:06:29,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24207 conditions, 3294 events. 2047/3294 cut-off events. For 154756/154756 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18211 event pairs, 534 based on Foata normal form. 2/3290 useless extension candidates. Maximal degree in co-relation 24138. Up to 2904 conditions per place. [2024-06-21 21:06:29,565 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 156 selfloop transitions, 39 changer transitions 0/212 dead transitions. [2024-06-21 21:06:29,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 212 transitions, 2455 flow [2024-06-21 21:06:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:06:29,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:06:29,566 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1719 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:06:29,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 212 transitions, 2455 flow [2024-06-21 21:06:29,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 212 transitions, 2305 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:06:29,667 INFO L231 Difference]: Finished difference. Result has 162 places, 196 transitions, 1982 flow [2024-06-21 21:06:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1982, PETRI_PLACES=162, PETRI_TRANSITIONS=196} [2024-06-21 21:06:29,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 21:06:29,667 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 196 transitions, 1982 flow [2024-06-21 21:06:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:29,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:29,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:06:29,668 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:29,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2127356628, now seen corresponding path program 4 times [2024-06-21 21:06:29,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:29,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475722250] [2024-06-21 21:06:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:29,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475722250] [2024-06-21 21:06:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475722250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691143510] [2024-06-21 21:06:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:30,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:30,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 196 transitions, 1982 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:30,892 INFO L124 PetriNetUnfolderBase]: 2033/3272 cut-off events. [2024-06-21 21:06:30,892 INFO L125 PetriNetUnfolderBase]: For 159560/159560 co-relation queries the response was YES. [2024-06-21 21:06:30,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24154 conditions, 3272 events. 2033/3272 cut-off events. For 159560/159560 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18158 event pairs, 531 based on Foata normal form. 2/3268 useless extension candidates. Maximal degree in co-relation 24082. Up to 2878 conditions per place. [2024-06-21 21:06:30,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 154 selfloop transitions, 40 changer transitions 0/211 dead transitions. [2024-06-21 21:06:30,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 211 transitions, 2420 flow [2024-06-21 21:06:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 21:06:30,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 21:06:30,923 INFO L175 Difference]: Start difference. First operand has 162 places, 196 transitions, 1982 flow. Second operand 7 states and 137 transitions. [2024-06-21 21:06:30,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 211 transitions, 2420 flow [2024-06-21 21:06:31,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 211 transitions, 2303 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:31,037 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1956 flow [2024-06-21 21:06:31,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1956, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-06-21 21:06:31,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:06:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1956 flow [2024-06-21 21:06:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:31,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:31,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:31,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:06:31,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:31,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1064941850, now seen corresponding path program 5 times [2024-06-21 21:06:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833058037] [2024-06-21 21:06:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833058037] [2024-06-21 21:06:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833058037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:31,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565323400] [2024-06-21 21:06:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:31,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:31,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 1956 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:31,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:31,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:31,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:32,301 INFO L124 PetriNetUnfolderBase]: 2058/3310 cut-off events. [2024-06-21 21:06:32,301 INFO L125 PetriNetUnfolderBase]: For 169196/169216 co-relation queries the response was YES. [2024-06-21 21:06:32,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 3310 events. 2058/3310 cut-off events. For 169196/169216 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18390 event pairs, 521 based on Foata normal form. 2/3292 useless extension candidates. Maximal degree in co-relation 24571. Up to 2881 conditions per place. [2024-06-21 21:06:32,326 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 50 changer transitions 0/213 dead transitions. [2024-06-21 21:06:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 213 transitions, 2457 flow [2024-06-21 21:06:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:06:32,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:06:32,327 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1956 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:06:32,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 213 transitions, 2457 flow [2024-06-21 21:06:32,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 213 transitions, 2268 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:06:32,448 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 1932 flow [2024-06-21 21:06:32,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1932, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2024-06-21 21:06:32,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 21:06:32,449 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 1932 flow [2024-06-21 21:06:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:32,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:32,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:06:32,449 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:32,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -965786924, now seen corresponding path program 6 times [2024-06-21 21:06:32,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:32,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756711932] [2024-06-21 21:06:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:33,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756711932] [2024-06-21 21:06:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756711932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113853604] [2024-06-21 21:06:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 1932 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:33,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:33,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:33,662 INFO L124 PetriNetUnfolderBase]: 2056/3319 cut-off events. [2024-06-21 21:06:33,662 INFO L125 PetriNetUnfolderBase]: For 169079/169102 co-relation queries the response was YES. [2024-06-21 21:06:33,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24587 conditions, 3319 events. 2056/3319 cut-off events. For 169079/169102 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18628 event pairs, 526 based on Foata normal form. 6/3298 useless extension candidates. Maximal degree in co-relation 24512. Up to 2781 conditions per place. [2024-06-21 21:06:33,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 63 changer transitions 0/215 dead transitions. [2024-06-21 21:06:33,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 215 transitions, 2516 flow [2024-06-21 21:06:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 21:06:33,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 21:06:33,690 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 1932 flow. Second operand 7 states and 138 transitions. [2024-06-21 21:06:33,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 215 transitions, 2516 flow [2024-06-21 21:06:33,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 2384 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:33,801 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 1994 flow [2024-06-21 21:06:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1994, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2024-06-21 21:06:33,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:06:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 1994 flow [2024-06-21 21:06:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:33,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:33,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:33,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:06:33,803 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:33,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash -960073004, now seen corresponding path program 7 times [2024-06-21 21:06:33,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193619096] [2024-06-21 21:06:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:33,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193619096] [2024-06-21 21:06:34,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193619096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:34,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:34,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:06:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226590773] [2024-06-21 21:06:34,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:06:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:06:34,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:06:34,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:34,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 1994 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:34,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:34,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:34,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:34,966 INFO L124 PetriNetUnfolderBase]: 2046/3305 cut-off events. [2024-06-21 21:06:34,966 INFO L125 PetriNetUnfolderBase]: For 172847/172870 co-relation queries the response was YES. [2024-06-21 21:06:34,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 3305 events. 2046/3305 cut-off events. For 172847/172870 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18537 event pairs, 529 based on Foata normal form. 4/3282 useless extension candidates. Maximal degree in co-relation 24525. Up to 2773 conditions per place. [2024-06-21 21:06:34,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 67 changer transitions 0/214 dead transitions. [2024-06-21 21:06:34,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 214 transitions, 2436 flow [2024-06-21 21:06:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:06:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:06:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 21:06:34,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 21:06:34,995 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 1994 flow. Second operand 7 states and 136 transitions. [2024-06-21 21:06:34,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 214 transitions, 2436 flow [2024-06-21 21:06:35,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 214 transitions, 2256 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:35,099 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 1954 flow [2024-06-21 21:06:35,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1954, PETRI_PLACES=169, PETRI_TRANSITIONS=202} [2024-06-21 21:06:35,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 21:06:35,100 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 1954 flow [2024-06-21 21:06:35,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:35,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:35,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:35,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:06:35,100 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:35,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash -965779391, now seen corresponding path program 4 times [2024-06-21 21:06:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:35,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701820355] [2024-06-21 21:06:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:35,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701820355] [2024-06-21 21:06:35,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701820355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:35,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:35,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662906985] [2024-06-21 21:06:35,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:35,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:35,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 202 transitions, 1954 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:36,420 INFO L124 PetriNetUnfolderBase]: 2170/3458 cut-off events. [2024-06-21 21:06:36,420 INFO L125 PetriNetUnfolderBase]: For 182223/182226 co-relation queries the response was YES. [2024-06-21 21:06:36,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25856 conditions, 3458 events. 2170/3458 cut-off events. For 182223/182226 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19073 event pairs, 557 based on Foata normal form. 5/3451 useless extension candidates. Maximal degree in co-relation 25779. Up to 2814 conditions per place. [2024-06-21 21:06:36,450 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 140 selfloop transitions, 88 changer transitions 0/233 dead transitions. [2024-06-21 21:06:36,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 233 transitions, 3040 flow [2024-06-21 21:06:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:06:36,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:06:36,455 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 1954 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:06:36,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 233 transitions, 3040 flow [2024-06-21 21:06:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 2866 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:06:36,596 INFO L231 Difference]: Finished difference. Result has 171 places, 213 transitions, 2200 flow [2024-06-21 21:06:36,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=171, PETRI_TRANSITIONS=213} [2024-06-21 21:06:36,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 21:06:36,597 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 213 transitions, 2200 flow [2024-06-21 21:06:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:36,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:36,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:06:36,598 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:36,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash -952892381, now seen corresponding path program 5 times [2024-06-21 21:06:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:36,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321015822] [2024-06-21 21:06:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:37,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:37,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321015822] [2024-06-21 21:06:37,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321015822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:37,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:37,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369127931] [2024-06-21 21:06:37,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:37,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:37,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:37,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:37,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:37,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 213 transitions, 2200 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:37,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:37,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:37,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:37,914 INFO L124 PetriNetUnfolderBase]: 2181/3478 cut-off events. [2024-06-21 21:06:37,915 INFO L125 PetriNetUnfolderBase]: For 194072/194075 co-relation queries the response was YES. [2024-06-21 21:06:37,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26814 conditions, 3478 events. 2181/3478 cut-off events. For 194072/194075 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19235 event pairs, 545 based on Foata normal form. 5/3471 useless extension candidates. Maximal degree in co-relation 26735. Up to 2827 conditions per place. [2024-06-21 21:06:37,941 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 98 changer transitions 0/235 dead transitions. [2024-06-21 21:06:37,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 235 transitions, 3056 flow [2024-06-21 21:06:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:06:37,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:06:37,942 INFO L175 Difference]: Start difference. First operand has 171 places, 213 transitions, 2200 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:06:37,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 235 transitions, 3056 flow [2024-06-21 21:06:38,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 235 transitions, 2870 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:38,103 INFO L231 Difference]: Finished difference. Result has 177 places, 218 transitions, 2357 flow [2024-06-21 21:06:38,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2357, PETRI_PLACES=177, PETRI_TRANSITIONS=218} [2024-06-21 21:06:38,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 21:06:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 218 transitions, 2357 flow [2024-06-21 21:06:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:38,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:38,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:06:38,104 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:38,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash -944591856, now seen corresponding path program 2 times [2024-06-21 21:06:38,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57945551] [2024-06-21 21:06:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:38,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57945551] [2024-06-21 21:06:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57945551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:38,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327217699] [2024-06-21 21:06:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:38,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 218 transitions, 2357 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:39,344 INFO L124 PetriNetUnfolderBase]: 2186/3483 cut-off events. [2024-06-21 21:06:39,344 INFO L125 PetriNetUnfolderBase]: For 201566/201572 co-relation queries the response was YES. [2024-06-21 21:06:39,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27429 conditions, 3483 events. 2186/3483 cut-off events. For 201566/201572 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19240 event pairs, 559 based on Foata normal form. 5/3485 useless extension candidates. Maximal degree in co-relation 27347. Up to 3250 conditions per place. [2024-06-21 21:06:39,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 35 changer transitions 0/239 dead transitions. [2024-06-21 21:06:39,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 239 transitions, 3112 flow [2024-06-21 21:06:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:06:39,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:06:39,375 INFO L175 Difference]: Start difference. First operand has 177 places, 218 transitions, 2357 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:06:39,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 239 transitions, 3112 flow [2024-06-21 21:06:39,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 239 transitions, 2818 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:39,558 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 2329 flow [2024-06-21 21:06:39,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2329, PETRI_PLACES=180, PETRI_TRANSITIONS=227} [2024-06-21 21:06:39,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 21:06:39,559 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 2329 flow [2024-06-21 21:06:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:39,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:39,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:06:39,560 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:39,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -965790551, now seen corresponding path program 6 times [2024-06-21 21:06:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:39,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128575933] [2024-06-21 21:06:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:40,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:40,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128575933] [2024-06-21 21:06:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128575933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:40,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:40,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650486554] [2024-06-21 21:06:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:40,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:40,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 227 transitions, 2329 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:40,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:40,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:40,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:40,900 INFO L124 PetriNetUnfolderBase]: 2193/3495 cut-off events. [2024-06-21 21:06:40,900 INFO L125 PetriNetUnfolderBase]: For 211429/211432 co-relation queries the response was YES. [2024-06-21 21:06:40,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27351 conditions, 3495 events. 2193/3495 cut-off events. For 211429/211432 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19317 event pairs, 559 based on Foata normal form. 5/3488 useless extension candidates. Maximal degree in co-relation 27267. Up to 2842 conditions per place. [2024-06-21 21:06:40,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 99 changer transitions 0/247 dead transitions. [2024-06-21 21:06:40,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 3144 flow [2024-06-21 21:06:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:06:40,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:06:40,940 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 2329 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:06:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 3144 flow [2024-06-21 21:06:41,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 247 transitions, 3054 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:41,146 INFO L231 Difference]: Finished difference. Result has 185 places, 231 transitions, 2535 flow [2024-06-21 21:06:41,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=185, PETRI_TRANSITIONS=231} [2024-06-21 21:06:41,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 21:06:41,146 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 231 transitions, 2535 flow [2024-06-21 21:06:41,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:41,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:41,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:06:41,147 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:41,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -952891978, now seen corresponding path program 3 times [2024-06-21 21:06:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:41,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561387596] [2024-06-21 21:06:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:41,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:41,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:41,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561387596] [2024-06-21 21:06:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561387596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:41,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276406327] [2024-06-21 21:06:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:41,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:41,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:41,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:41,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:41,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:41,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 231 transitions, 2535 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:41,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:41,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:41,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:42,418 INFO L124 PetriNetUnfolderBase]: 2198/3502 cut-off events. [2024-06-21 21:06:42,418 INFO L125 PetriNetUnfolderBase]: For 218087/218093 co-relation queries the response was YES. [2024-06-21 21:06:42,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28029 conditions, 3502 events. 2198/3502 cut-off events. For 218087/218093 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19371 event pairs, 559 based on Foata normal form. 5/3504 useless extension candidates. Maximal degree in co-relation 27943. Up to 3266 conditions per place. [2024-06-21 21:06:42,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 39 changer transitions 0/246 dead transitions. [2024-06-21 21:06:42,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 246 transitions, 3218 flow [2024-06-21 21:06:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:06:42,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:06:42,452 INFO L175 Difference]: Start difference. First operand has 185 places, 231 transitions, 2535 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:06:42,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 246 transitions, 3218 flow [2024-06-21 21:06:42,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 246 transitions, 2978 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:42,656 INFO L231 Difference]: Finished difference. Result has 188 places, 234 transitions, 2453 flow [2024-06-21 21:06:42,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2453, PETRI_PLACES=188, PETRI_TRANSITIONS=234} [2024-06-21 21:06:42,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-21 21:06:42,657 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 234 transitions, 2453 flow [2024-06-21 21:06:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:42,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:42,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:06:42,657 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1081484690, now seen corresponding path program 4 times [2024-06-21 21:06:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:42,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46978854] [2024-06-21 21:06:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:43,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:43,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46978854] [2024-06-21 21:06:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46978854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:43,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:43,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:43,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933094504] [2024-06-21 21:06:43,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:43,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:43,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:43,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 234 transitions, 2453 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:43,986 INFO L124 PetriNetUnfolderBase]: 2195/3498 cut-off events. [2024-06-21 21:06:43,986 INFO L125 PetriNetUnfolderBase]: For 224252/224258 co-relation queries the response was YES. [2024-06-21 21:06:44,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27699 conditions, 3498 events. 2195/3498 cut-off events. For 224252/224258 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19300 event pairs, 559 based on Foata normal form. 5/3500 useless extension candidates. Maximal degree in co-relation 27612. Up to 3263 conditions per place. [2024-06-21 21:06:44,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-21 21:06:44,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 2966 flow [2024-06-21 21:06:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:06:44,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:06:44,020 INFO L175 Difference]: Start difference. First operand has 188 places, 234 transitions, 2453 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:06:44,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 2966 flow [2024-06-21 21:06:44,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 245 transitions, 2786 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:44,229 INFO L231 Difference]: Finished difference. Result has 191 places, 234 transitions, 2361 flow [2024-06-21 21:06:44,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2361, PETRI_PLACES=191, PETRI_TRANSITIONS=234} [2024-06-21 21:06:44,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:06:44,229 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 234 transitions, 2361 flow [2024-06-21 21:06:44,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:44,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:44,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:06:44,230 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:44,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2135073489, now seen corresponding path program 1 times [2024-06-21 21:06:44,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:44,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350929049] [2024-06-21 21:06:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:45,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350929049] [2024-06-21 21:06:45,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350929049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:45,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:45,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:45,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955990748] [2024-06-21 21:06:45,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:45,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 234 transitions, 2361 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:45,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:45,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:45,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:45,748 INFO L124 PetriNetUnfolderBase]: 2088/3390 cut-off events. [2024-06-21 21:06:45,748 INFO L125 PetriNetUnfolderBase]: For 233555/233555 co-relation queries the response was YES. [2024-06-21 21:06:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27018 conditions, 3390 events. 2088/3390 cut-off events. For 233555/233555 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19183 event pairs, 514 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 26930. Up to 3098 conditions per place. [2024-06-21 21:06:45,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 21 changer transitions 0/253 dead transitions. [2024-06-21 21:06:45,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 253 transitions, 2959 flow [2024-06-21 21:06:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:45,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:06:45,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:06:45,781 INFO L175 Difference]: Start difference. First operand has 191 places, 234 transitions, 2361 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:06:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 253 transitions, 2959 flow [2024-06-21 21:06:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 253 transitions, 2883 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:46,021 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2405 flow [2024-06-21 21:06:46,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2405, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-21 21:06:46,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 21:06:46,021 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2405 flow [2024-06-21 21:06:46,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:46,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:46,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:46,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:06:46,022 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:46,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2138798356, now seen corresponding path program 1 times [2024-06-21 21:06:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:46,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879067010] [2024-06-21 21:06:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:46,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:46,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879067010] [2024-06-21 21:06:46,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879067010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:46,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:46,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138610258] [2024-06-21 21:06:46,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:46,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:46,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:46,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:46,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2405 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:46,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:46,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:46,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:47,486 INFO L124 PetriNetUnfolderBase]: 2098/3412 cut-off events. [2024-06-21 21:06:47,486 INFO L125 PetriNetUnfolderBase]: For 247116/247116 co-relation queries the response was YES. [2024-06-21 21:06:47,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27550 conditions, 3412 events. 2098/3412 cut-off events. For 247116/247116 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19402 event pairs, 507 based on Foata normal form. 4/3414 useless extension candidates. Maximal degree in co-relation 27461. Up to 3106 conditions per place. [2024-06-21 21:06:47,515 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 223 selfloop transitions, 22 changer transitions 0/256 dead transitions. [2024-06-21 21:06:47,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 256 transitions, 3013 flow [2024-06-21 21:06:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:06:47,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 21:06:47,516 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2405 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:06:47,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 256 transitions, 3013 flow [2024-06-21 21:06:47,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 256 transitions, 2915 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:47,737 INFO L231 Difference]: Finished difference. Result has 196 places, 240 transitions, 2419 flow [2024-06-21 21:06:47,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2419, PETRI_PLACES=196, PETRI_TRANSITIONS=240} [2024-06-21 21:06:47,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 21:06:47,737 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 240 transitions, 2419 flow [2024-06-21 21:06:47,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:47,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:47,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:06:47,738 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:47,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:47,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1089097298, now seen corresponding path program 2 times [2024-06-21 21:06:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588039130] [2024-06-21 21:06:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:48,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588039130] [2024-06-21 21:06:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588039130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:48,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831900261] [2024-06-21 21:06:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:48,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:48,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 240 transitions, 2419 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:48,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:48,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:48,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:49,118 INFO L124 PetriNetUnfolderBase]: 2119/3451 cut-off events. [2024-06-21 21:06:49,118 INFO L125 PetriNetUnfolderBase]: For 259749/259752 co-relation queries the response was YES. [2024-06-21 21:06:49,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28341 conditions, 3451 events. 2119/3451 cut-off events. For 259749/259752 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19730 event pairs, 513 based on Foata normal form. 6/3453 useless extension candidates. Maximal degree in co-relation 28251. Up to 3079 conditions per place. [2024-06-21 21:06:49,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 41 changer transitions 0/262 dead transitions. [2024-06-21 21:06:49,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 262 transitions, 3211 flow [2024-06-21 21:06:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:06:49,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:06:49,151 INFO L175 Difference]: Start difference. First operand has 196 places, 240 transitions, 2419 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:06:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 262 transitions, 3211 flow [2024-06-21 21:06:49,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 262 transitions, 3121 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:06:49,328 INFO L231 Difference]: Finished difference. Result has 197 places, 246 transitions, 2547 flow [2024-06-21 21:06:49,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2547, PETRI_PLACES=197, PETRI_TRANSITIONS=246} [2024-06-21 21:06:49,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 21:06:49,329 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 246 transitions, 2547 flow [2024-06-21 21:06:49,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:49,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:49,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:06:49,329 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:49,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -952707466, now seen corresponding path program 3 times [2024-06-21 21:06:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458587088] [2024-06-21 21:06:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458587088] [2024-06-21 21:06:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458587088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968093851] [2024-06-21 21:06:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:50,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:50,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:50,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 246 transitions, 2547 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:50,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:50,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:50,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:50,658 INFO L124 PetriNetUnfolderBase]: 2127/3465 cut-off events. [2024-06-21 21:06:50,659 INFO L125 PetriNetUnfolderBase]: For 271237/271240 co-relation queries the response was YES. [2024-06-21 21:06:50,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28885 conditions, 3465 events. 2127/3465 cut-off events. For 271237/271240 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19843 event pairs, 507 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 28794. Up to 3087 conditions per place. [2024-06-21 21:06:50,692 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 209 selfloop transitions, 45 changer transitions 0/265 dead transitions. [2024-06-21 21:06:50,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 265 transitions, 3291 flow [2024-06-21 21:06:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:06:50,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:06:50,693 INFO L175 Difference]: Start difference. First operand has 197 places, 246 transitions, 2547 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:06:50,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 265 transitions, 3291 flow [2024-06-21 21:06:50,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 265 transitions, 3188 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:50,911 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 2608 flow [2024-06-21 21:06:50,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2608, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-21 21:06:50,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 21:06:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 2608 flow [2024-06-21 21:06:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:50,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:50,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:06:50,912 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:50,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash -952440556, now seen corresponding path program 4 times [2024-06-21 21:06:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:50,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927132669] [2024-06-21 21:06:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:50,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:51,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927132669] [2024-06-21 21:06:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927132669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:51,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:51,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:51,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689486278] [2024-06-21 21:06:51,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:51,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:51,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:51,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:51,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:51,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 2608 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:51,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:51,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:51,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:52,305 INFO L124 PetriNetUnfolderBase]: 2117/3451 cut-off events. [2024-06-21 21:06:52,305 INFO L125 PetriNetUnfolderBase]: For 273530/273533 co-relation queries the response was YES. [2024-06-21 21:06:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28781 conditions, 3451 events. 2117/3451 cut-off events. For 273530/273533 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19738 event pairs, 503 based on Foata normal form. 5/3452 useless extension candidates. Maximal degree in co-relation 28688. Up to 3081 conditions per place. [2024-06-21 21:06:52,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 47 changer transitions 0/264 dead transitions. [2024-06-21 21:06:52,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 264 transitions, 3178 flow [2024-06-21 21:06:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:06:52,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:06:52,339 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 2608 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:06:52,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 264 transitions, 3178 flow [2024-06-21 21:06:52,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 264 transitions, 2992 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:52,562 INFO L231 Difference]: Finished difference. Result has 203 places, 249 transitions, 2523 flow [2024-06-21 21:06:52,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2523, PETRI_PLACES=203, PETRI_TRANSITIONS=249} [2024-06-21 21:06:52,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 21:06:52,563 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 249 transitions, 2523 flow [2024-06-21 21:06:52,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:52,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:52,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:06:52,564 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:52,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1081468818, now seen corresponding path program 1 times [2024-06-21 21:06:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384536735] [2024-06-21 21:06:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384536735] [2024-06-21 21:06:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384536735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715376528] [2024-06-21 21:06:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:53,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:53,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 249 transitions, 2523 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:53,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:53,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:53,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:54,117 INFO L124 PetriNetUnfolderBase]: 2253/3581 cut-off events. [2024-06-21 21:06:54,118 INFO L125 PetriNetUnfolderBase]: For 277547/277547 co-relation queries the response was YES. [2024-06-21 21:06:54,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29615 conditions, 3581 events. 2253/3581 cut-off events. For 277547/277547 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19906 event pairs, 563 based on Foata normal form. 1/3580 useless extension candidates. Maximal degree in co-relation 29521. Up to 3381 conditions per place. [2024-06-21 21:06:54,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 21 changer transitions 0/263 dead transitions. [2024-06-21 21:06:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 263 transitions, 3143 flow [2024-06-21 21:06:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:06:54,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:06:54,155 INFO L175 Difference]: Start difference. First operand has 203 places, 249 transitions, 2523 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:06:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 263 transitions, 3143 flow [2024-06-21 21:06:54,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 263 transitions, 3039 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:06:54,372 INFO L231 Difference]: Finished difference. Result has 205 places, 252 transitions, 2549 flow [2024-06-21 21:06:54,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2549, PETRI_PLACES=205, PETRI_TRANSITIONS=252} [2024-06-21 21:06:54,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 21:06:54,372 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 252 transitions, 2549 flow [2024-06-21 21:06:54,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:54,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:54,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:54,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:06:54,373 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:54,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1314569218, now seen corresponding path program 1 times [2024-06-21 21:06:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:54,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158265397] [2024-06-21 21:06:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:55,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158265397] [2024-06-21 21:06:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158265397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:55,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567114626] [2024-06-21 21:06:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:55,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:55,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 252 transitions, 2549 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:55,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:55,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:55,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:55,878 INFO L124 PetriNetUnfolderBase]: 2219/3572 cut-off events. [2024-06-21 21:06:55,878 INFO L125 PetriNetUnfolderBase]: For 299115/299118 co-relation queries the response was YES. [2024-06-21 21:06:55,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29938 conditions, 3572 events. 2219/3572 cut-off events. For 299115/299118 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20166 event pairs, 424 based on Foata normal form. 12/3576 useless extension candidates. Maximal degree in co-relation 29843. Up to 3042 conditions per place. [2024-06-21 21:06:55,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 40 changer transitions 0/286 dead transitions. [2024-06-21 21:06:55,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 286 transitions, 3280 flow [2024-06-21 21:06:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 21:06:55,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 21:06:55,918 INFO L175 Difference]: Start difference. First operand has 205 places, 252 transitions, 2549 flow. Second operand 8 states and 163 transitions. [2024-06-21 21:06:55,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 286 transitions, 3280 flow [2024-06-21 21:06:56,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 286 transitions, 3102 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 21:06:56,239 INFO L231 Difference]: Finished difference. Result has 204 places, 256 transitions, 2549 flow [2024-06-21 21:06:56,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2549, PETRI_PLACES=204, PETRI_TRANSITIONS=256} [2024-06-21 21:06:56,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 21:06:56,240 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 256 transitions, 2549 flow [2024-06-21 21:06:56,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:56,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:56,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:56,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:06:56,240 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:56,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:56,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1305998338, now seen corresponding path program 2 times [2024-06-21 21:06:56,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:56,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768981029] [2024-06-21 21:06:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:57,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768981029] [2024-06-21 21:06:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768981029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518679835] [2024-06-21 21:06:57,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:57,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:57,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:57,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 256 transitions, 2549 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:57,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:57,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:57,898 INFO L124 PetriNetUnfolderBase]: 2335/3764 cut-off events. [2024-06-21 21:06:57,898 INFO L125 PetriNetUnfolderBase]: For 319694/319699 co-relation queries the response was YES. [2024-06-21 21:06:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31957 conditions, 3764 events. 2335/3764 cut-off events. For 319694/319699 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21444 event pairs, 546 based on Foata normal form. 16/3767 useless extension candidates. Maximal degree in co-relation 31861. Up to 3204 conditions per place. [2024-06-21 21:06:57,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 52 changer transitions 0/303 dead transitions. [2024-06-21 21:06:57,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 303 transitions, 3580 flow [2024-06-21 21:06:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 21:06:57,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 21:06:57,940 INFO L175 Difference]: Start difference. First operand has 204 places, 256 transitions, 2549 flow. Second operand 9 states and 174 transitions. [2024-06-21 21:06:57,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 303 transitions, 3580 flow [2024-06-21 21:06:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 303 transitions, 3425 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:58,304 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 2881 flow [2024-06-21 21:06:58,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2881, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-06-21 21:06:58,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 21:06:58,304 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 2881 flow [2024-06-21 21:06:58,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:58,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:58,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:58,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:06:58,305 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:06:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1428197914, now seen corresponding path program 1 times [2024-06-21 21:06:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:58,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294726111] [2024-06-21 21:06:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:59,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:59,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294726111] [2024-06-21 21:06:59,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294726111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:59,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:59,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393589877] [2024-06-21 21:06:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:06:59,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 2881 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:59,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:59,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:06:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:59,952 INFO L124 PetriNetUnfolderBase]: 2347/3775 cut-off events. [2024-06-21 21:06:59,952 INFO L125 PetriNetUnfolderBase]: For 315715/315717 co-relation queries the response was YES. [2024-06-21 21:06:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32434 conditions, 3775 events. 2347/3775 cut-off events. For 315715/315717 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21475 event pairs, 552 based on Foata normal form. 2/3767 useless extension candidates. Maximal degree in co-relation 32334. Up to 3160 conditions per place. [2024-06-21 21:06:59,990 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 59 changer transitions 0/302 dead transitions. [2024-06-21 21:06:59,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 302 transitions, 3609 flow [2024-06-21 21:06:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 21:06:59,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:06:59,991 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 2881 flow. Second operand 8 states and 160 transitions. [2024-06-21 21:06:59,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 302 transitions, 3609 flow [2024-06-21 21:07:00,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 302 transitions, 3519 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:00,312 INFO L231 Difference]: Finished difference. Result has 216 places, 280 transitions, 3024 flow [2024-06-21 21:07:00,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3024, PETRI_PLACES=216, PETRI_TRANSITIONS=280} [2024-06-21 21:07:00,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 21:07:00,313 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 280 transitions, 3024 flow [2024-06-21 21:07:00,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:00,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:00,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:00,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:07:00,314 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:00,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash -585105860, now seen corresponding path program 1 times [2024-06-21 21:07:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916427661] [2024-06-21 21:07:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:00,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:00,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916427661] [2024-06-21 21:07:00,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916427661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007051664] [2024-06-21 21:07:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:01,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:01,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 280 transitions, 3024 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:01,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:01,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:01,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:01,800 INFO L124 PetriNetUnfolderBase]: 2449/3889 cut-off events. [2024-06-21 21:07:01,800 INFO L125 PetriNetUnfolderBase]: For 326273/326278 co-relation queries the response was YES. [2024-06-21 21:07:01,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33627 conditions, 3889 events. 2449/3889 cut-off events. For 326273/326278 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21685 event pairs, 576 based on Foata normal form. 6/3891 useless extension candidates. Maximal degree in co-relation 33526. Up to 3495 conditions per place. [2024-06-21 21:07:01,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 247 selfloop transitions, 53 changer transitions 0/305 dead transitions. [2024-06-21 21:07:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 305 transitions, 3776 flow [2024-06-21 21:07:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:07:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:07:01,839 INFO L175 Difference]: Start difference. First operand has 216 places, 280 transitions, 3024 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:07:01,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 305 transitions, 3776 flow [2024-06-21 21:07:02,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 305 transitions, 3541 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:02,167 INFO L231 Difference]: Finished difference. Result has 217 places, 284 transitions, 2982 flow [2024-06-21 21:07:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2982, PETRI_PLACES=217, PETRI_TRANSITIONS=284} [2024-06-21 21:07:02,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:07:02,168 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 284 transitions, 2982 flow [2024-06-21 21:07:02,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:02,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:02,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:07:02,169 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:02,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash -407974340, now seen corresponding path program 2 times [2024-06-21 21:07:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421129701] [2024-06-21 21:07:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:02,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421129701] [2024-06-21 21:07:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421129701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:02,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:02,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:02,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621360082] [2024-06-21 21:07:02,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:02,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:02,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:02,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:02,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:02,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 284 transitions, 2982 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:02,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:02,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:03,613 INFO L124 PetriNetUnfolderBase]: 2485/3951 cut-off events. [2024-06-21 21:07:03,613 INFO L125 PetriNetUnfolderBase]: For 340868/340873 co-relation queries the response was YES. [2024-06-21 21:07:03,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34249 conditions, 3951 events. 2485/3951 cut-off events. For 340868/340873 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22145 event pairs, 588 based on Foata normal form. 6/3953 useless extension candidates. Maximal degree in co-relation 34147. Up to 3357 conditions per place. [2024-06-21 21:07:03,651 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 83 changer transitions 0/312 dead transitions. [2024-06-21 21:07:03,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 312 transitions, 4057 flow [2024-06-21 21:07:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:07:03,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:07:03,653 INFO L175 Difference]: Start difference. First operand has 217 places, 284 transitions, 2982 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:07:03,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 312 transitions, 4057 flow [2024-06-21 21:07:03,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 3912 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:03,991 INFO L231 Difference]: Finished difference. Result has 219 places, 291 transitions, 3159 flow [2024-06-21 21:07:03,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3159, PETRI_PLACES=219, PETRI_TRANSITIONS=291} [2024-06-21 21:07:03,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 21:07:03,992 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 291 transitions, 3159 flow [2024-06-21 21:07:03,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:03,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:03,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:03,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:07:03,992 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:03,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1018750540, now seen corresponding path program 3 times [2024-06-21 21:07:03,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:03,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290544918] [2024-06-21 21:07:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:03,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290544918] [2024-06-21 21:07:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290544918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:04,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158938149] [2024-06-21 21:07:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:04,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:04,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 291 transitions, 3159 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:04,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:04,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:04,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:05,684 INFO L124 PetriNetUnfolderBase]: 2659/4216 cut-off events. [2024-06-21 21:07:05,684 INFO L125 PetriNetUnfolderBase]: For 353261/353266 co-relation queries the response was YES. [2024-06-21 21:07:05,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36150 conditions, 4216 events. 2659/4216 cut-off events. For 353261/353266 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23823 event pairs, 588 based on Foata normal form. 8/4215 useless extension candidates. Maximal degree in co-relation 36047. Up to 3636 conditions per place. [2024-06-21 21:07:05,731 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 267 selfloop transitions, 82 changer transitions 0/354 dead transitions. [2024-06-21 21:07:05,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 354 transitions, 4583 flow [2024-06-21 21:07:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:07:05,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:07:05,732 INFO L175 Difference]: Start difference. First operand has 219 places, 291 transitions, 3159 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:07:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 354 transitions, 4583 flow [2024-06-21 21:07:06,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 354 transitions, 4348 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:06,135 INFO L231 Difference]: Finished difference. Result has 226 places, 325 transitions, 3647 flow [2024-06-21 21:07:06,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3647, PETRI_PLACES=226, PETRI_TRANSITIONS=325} [2024-06-21 21:07:06,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 21:07:06,135 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 325 transitions, 3647 flow [2024-06-21 21:07:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:06,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:06,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:07:06,136 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:06,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1019111008, now seen corresponding path program 3 times [2024-06-21 21:07:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147487587] [2024-06-21 21:07:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:06,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:06,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147487587] [2024-06-21 21:07:06,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147487587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:06,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:06,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976363896] [2024-06-21 21:07:06,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:06,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:06,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:06,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:07:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 325 transitions, 3647 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:06,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:07:06,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:07,784 INFO L124 PetriNetUnfolderBase]: 2613/4221 cut-off events. [2024-06-21 21:07:07,785 INFO L125 PetriNetUnfolderBase]: For 385919/385932 co-relation queries the response was YES. [2024-06-21 21:07:07,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36524 conditions, 4221 events. 2613/4221 cut-off events. For 385919/385932 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24632 event pairs, 558 based on Foata normal form. 22/4225 useless extension candidates. Maximal degree in co-relation 36418. Up to 3431 conditions per place. [2024-06-21 21:07:07,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 76 changer transitions 0/350 dead transitions. [2024-06-21 21:07:07,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 350 transitions, 4485 flow [2024-06-21 21:07:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 21:07:07,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 21:07:07,827 INFO L175 Difference]: Start difference. First operand has 226 places, 325 transitions, 3647 flow. Second operand 8 states and 158 transitions. [2024-06-21 21:07:07,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 350 transitions, 4485 flow [2024-06-21 21:07:08,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 350 transitions, 4335 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:08,190 INFO L231 Difference]: Finished difference. Result has 229 places, 327 transitions, 3735 flow [2024-06-21 21:07:08,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3735, PETRI_PLACES=229, PETRI_TRANSITIONS=327} [2024-06-21 21:07:08,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 21:07:08,190 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 327 transitions, 3735 flow [2024-06-21 21:07:08,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:08,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:08,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:08,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:07:08,191 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:08,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1305987426, now seen corresponding path program 1 times [2024-06-21 21:07:08,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:08,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779431577] [2024-06-21 21:07:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:08,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:08,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:08,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779431577] [2024-06-21 21:07:08,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779431577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:08,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:08,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340740483] [2024-06-21 21:07:08,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:08,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:08,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:08,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 327 transitions, 3735 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:08,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:08,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:08,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:09,824 INFO L124 PetriNetUnfolderBase]: 2718/4313 cut-off events. [2024-06-21 21:07:09,824 INFO L125 PetriNetUnfolderBase]: For 375935/375944 co-relation queries the response was YES. [2024-06-21 21:07:09,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37419 conditions, 4313 events. 2718/4313 cut-off events. For 375935/375944 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24511 event pairs, 603 based on Foata normal form. 11/4320 useless extension candidates. Maximal degree in co-relation 37312. Up to 3861 conditions per place. [2024-06-21 21:07:09,871 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 283 selfloop transitions, 69 changer transitions 0/357 dead transitions. [2024-06-21 21:07:09,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 357 transitions, 4649 flow [2024-06-21 21:07:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:07:09,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:07:09,873 INFO L175 Difference]: Start difference. First operand has 229 places, 327 transitions, 3735 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:07:09,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 357 transitions, 4649 flow [2024-06-21 21:07:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 357 transitions, 4451 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:10,312 INFO L231 Difference]: Finished difference. Result has 232 places, 331 transitions, 3797 flow [2024-06-21 21:07:10,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3797, PETRI_PLACES=232, PETRI_TRANSITIONS=331} [2024-06-21 21:07:10,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 21:07:10,313 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 331 transitions, 3797 flow [2024-06-21 21:07:10,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:10,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:10,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:07:10,313 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:10,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100096, now seen corresponding path program 2 times [2024-06-21 21:07:10,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:10,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590094146] [2024-06-21 21:07:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:11,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590094146] [2024-06-21 21:07:11,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590094146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:11,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:11,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:11,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589418217] [2024-06-21 21:07:11,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:11,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:11,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:11,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:11,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 331 transitions, 3797 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:11,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:11,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:11,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:12,019 INFO L124 PetriNetUnfolderBase]: 2789/4412 cut-off events. [2024-06-21 21:07:12,019 INFO L125 PetriNetUnfolderBase]: For 403623/403628 co-relation queries the response was YES. [2024-06-21 21:07:12,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39163 conditions, 4412 events. 2789/4412 cut-off events. For 403623/403628 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25040 event pairs, 608 based on Foata normal form. 5/4413 useless extension candidates. Maximal degree in co-relation 39055. Up to 3512 conditions per place. [2024-06-21 21:07:12,068 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 243 selfloop transitions, 118 changer transitions 0/366 dead transitions. [2024-06-21 21:07:12,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 366 transitions, 5185 flow [2024-06-21 21:07:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:07:12,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:07:12,069 INFO L175 Difference]: Start difference. First operand has 232 places, 331 transitions, 3797 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:07:12,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 366 transitions, 5185 flow [2024-06-21 21:07:12,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 366 transitions, 4955 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:12,569 INFO L231 Difference]: Finished difference. Result has 235 places, 343 transitions, 4214 flow [2024-06-21 21:07:12,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=235, PETRI_TRANSITIONS=343} [2024-06-21 21:07:12,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 21:07:12,570 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 343 transitions, 4214 flow [2024-06-21 21:07:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:12,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:12,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:12,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:07:12,570 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:12,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1807460012, now seen corresponding path program 3 times [2024-06-21 21:07:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:12,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977520962] [2024-06-21 21:07:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:12,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977520962] [2024-06-21 21:07:13,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977520962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:13,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:13,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283010564] [2024-06-21 21:07:13,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:13,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:13,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:13,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 343 transitions, 4214 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:13,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:13,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:13,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:14,314 INFO L124 PetriNetUnfolderBase]: 2808/4441 cut-off events. [2024-06-21 21:07:14,315 INFO L125 PetriNetUnfolderBase]: For 421798/421803 co-relation queries the response was YES. [2024-06-21 21:07:14,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40550 conditions, 4441 events. 2808/4441 cut-off events. For 421798/421803 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25233 event pairs, 581 based on Foata normal form. 5/4442 useless extension candidates. Maximal degree in co-relation 40440. Up to 3531 conditions per place. [2024-06-21 21:07:14,365 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 242 selfloop transitions, 123 changer transitions 0/370 dead transitions. [2024-06-21 21:07:14,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 370 transitions, 5413 flow [2024-06-21 21:07:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:07:14,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:07:14,366 INFO L175 Difference]: Start difference. First operand has 235 places, 343 transitions, 4214 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:07:14,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 370 transitions, 5413 flow [2024-06-21 21:07:14,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 370 transitions, 5208 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:14,993 INFO L231 Difference]: Finished difference. Result has 240 places, 347 transitions, 4386 flow [2024-06-21 21:07:14,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4386, PETRI_PLACES=240, PETRI_TRANSITIONS=347} [2024-06-21 21:07:14,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 21:07:14,993 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 347 transitions, 4386 flow [2024-06-21 21:07:14,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:14,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:14,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:07:14,994 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:14,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -407728262, now seen corresponding path program 1 times [2024-06-21 21:07:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107146311] [2024-06-21 21:07:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107146311] [2024-06-21 21:07:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107146311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:15,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:15,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424401961] [2024-06-21 21:07:15,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:15,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:15,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 347 transitions, 4386 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:15,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:15,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:15,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:16,769 INFO L124 PetriNetUnfolderBase]: 2813/4444 cut-off events. [2024-06-21 21:07:16,769 INFO L125 PetriNetUnfolderBase]: For 426843/426849 co-relation queries the response was YES. [2024-06-21 21:07:16,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41040 conditions, 4444 events. 2813/4444 cut-off events. For 426843/426849 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25203 event pairs, 622 based on Foata normal form. 7/4449 useless extension candidates. Maximal degree in co-relation 40928. Up to 4162 conditions per place. [2024-06-21 21:07:16,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 26 changer transitions 0/367 dead transitions. [2024-06-21 21:07:16,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 367 transitions, 5262 flow [2024-06-21 21:07:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:07:16,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:07:16,820 INFO L175 Difference]: Start difference. First operand has 240 places, 347 transitions, 4386 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:07:16,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 367 transitions, 5262 flow [2024-06-21 21:07:17,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 367 transitions, 4963 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:17,279 INFO L231 Difference]: Finished difference. Result has 243 places, 350 transitions, 4251 flow [2024-06-21 21:07:17,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4251, PETRI_PLACES=243, PETRI_TRANSITIONS=350} [2024-06-21 21:07:17,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 21:07:17,279 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 350 transitions, 4251 flow [2024-06-21 21:07:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:17,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:17,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:07:17,279 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:17,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash -407728696, now seen corresponding path program 4 times [2024-06-21 21:07:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:17,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648111132] [2024-06-21 21:07:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:17,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648111132] [2024-06-21 21:07:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648111132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:18,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047974590] [2024-06-21 21:07:18,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:18,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:18,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 350 transitions, 4251 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:18,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:18,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:18,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:18,906 INFO L124 PetriNetUnfolderBase]: 2808/4444 cut-off events. [2024-06-21 21:07:18,906 INFO L125 PetriNetUnfolderBase]: For 428096/428101 co-relation queries the response was YES. [2024-06-21 21:07:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40616 conditions, 4444 events. 2808/4444 cut-off events. For 428096/428101 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25262 event pairs, 581 based on Foata normal form. 5/4445 useless extension candidates. Maximal degree in co-relation 40503. Up to 3536 conditions per place. [2024-06-21 21:07:18,956 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 241 selfloop transitions, 127 changer transitions 0/373 dead transitions. [2024-06-21 21:07:18,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 373 transitions, 5341 flow [2024-06-21 21:07:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:07:18,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:07:18,957 INFO L175 Difference]: Start difference. First operand has 243 places, 350 transitions, 4251 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:07:18,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 373 transitions, 5341 flow [2024-06-21 21:07:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 373 transitions, 5121 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:19,478 INFO L231 Difference]: Finished difference. Result has 245 places, 350 transitions, 4293 flow [2024-06-21 21:07:19,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4293, PETRI_PLACES=245, PETRI_TRANSITIONS=350} [2024-06-21 21:07:19,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 21:07:19,478 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 350 transitions, 4293 flow [2024-06-21 21:07:19,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:19,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:19,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:19,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:07:19,479 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:19,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 699409560, now seen corresponding path program 2 times [2024-06-21 21:07:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:19,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451644651] [2024-06-21 21:07:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451644651] [2024-06-21 21:07:20,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451644651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:20,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:20,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:20,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128312717] [2024-06-21 21:07:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:20,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:20,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:07:20,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 350 transitions, 4293 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:20,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:20,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:07:20,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:21,251 INFO L124 PetriNetUnfolderBase]: 2711/4332 cut-off events. [2024-06-21 21:07:21,251 INFO L125 PetriNetUnfolderBase]: For 439029/439031 co-relation queries the response was YES. [2024-06-21 21:07:21,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40603 conditions, 4332 events. 2711/4332 cut-off events. For 439029/439031 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24910 event pairs, 615 based on Foata normal form. 1/4317 useless extension candidates. Maximal degree in co-relation 40489. Up to 3627 conditions per place. [2024-06-21 21:07:21,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 65 changer transitions 0/371 dead transitions. [2024-06-21 21:07:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 371 transitions, 5121 flow [2024-06-21 21:07:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 21:07:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 21:07:21,303 INFO L175 Difference]: Start difference. First operand has 245 places, 350 transitions, 4293 flow. Second operand 8 states and 157 transitions. [2024-06-21 21:07:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 371 transitions, 5121 flow [2024-06-21 21:07:21,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 371 transitions, 4793 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:21,826 INFO L231 Difference]: Finished difference. Result has 245 places, 353 transitions, 4207 flow [2024-06-21 21:07:21,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4207, PETRI_PLACES=245, PETRI_TRANSITIONS=353} [2024-06-21 21:07:21,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 21:07:21,826 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 353 transitions, 4207 flow [2024-06-21 21:07:21,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:21,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:21,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:21,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:07:21,827 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:21,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash -419586882, now seen corresponding path program 3 times [2024-06-21 21:07:21,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111809254] [2024-06-21 21:07:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:21,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111809254] [2024-06-21 21:07:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111809254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632207832] [2024-06-21 21:07:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:22,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:07:22,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 353 transitions, 4207 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:22,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:22,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:07:22,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:23,617 INFO L124 PetriNetUnfolderBase]: 2716/4340 cut-off events. [2024-06-21 21:07:23,617 INFO L125 PetriNetUnfolderBase]: For 452541/452543 co-relation queries the response was YES. [2024-06-21 21:07:23,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40624 conditions, 4340 events. 2716/4340 cut-off events. For 452541/452543 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24964 event pairs, 613 based on Foata normal form. 1/4326 useless extension candidates. Maximal degree in co-relation 40510. Up to 3634 conditions per place. [2024-06-21 21:07:23,659 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 61 changer transitions 0/376 dead transitions. [2024-06-21 21:07:23,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 5061 flow [2024-06-21 21:07:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 21:07:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 21:07:23,660 INFO L175 Difference]: Start difference. First operand has 245 places, 353 transitions, 4207 flow. Second operand 8 states and 157 transitions. [2024-06-21 21:07:23,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 5061 flow [2024-06-21 21:07:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 376 transitions, 4841 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:24,117 INFO L231 Difference]: Finished difference. Result has 247 places, 356 transitions, 4227 flow [2024-06-21 21:07:24,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4227, PETRI_PLACES=247, PETRI_TRANSITIONS=356} [2024-06-21 21:07:24,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 21:07:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 356 transitions, 4227 flow [2024-06-21 21:07:24,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:24,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:24,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:07:24,118 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:24,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1762755800, now seen corresponding path program 4 times [2024-06-21 21:07:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:24,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001758291] [2024-06-21 21:07:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:24,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001758291] [2024-06-21 21:07:24,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001758291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:24,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:24,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:24,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035409050] [2024-06-21 21:07:24,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:24,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:24,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:24,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:24,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:25,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:07:25,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 356 transitions, 4227 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:25,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:07:25,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:25,846 INFO L124 PetriNetUnfolderBase]: 2713/4335 cut-off events. [2024-06-21 21:07:25,847 INFO L125 PetriNetUnfolderBase]: For 463939/463941 co-relation queries the response was YES. [2024-06-21 21:07:25,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 4335 events. 2713/4335 cut-off events. For 463939/463941 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24982 event pairs, 615 based on Foata normal form. 1/4320 useless extension candidates. Maximal degree in co-relation 40740. Up to 3615 conditions per place. [2024-06-21 21:07:25,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 77 changer transitions 0/374 dead transitions. [2024-06-21 21:07:25,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 374 transitions, 5063 flow [2024-06-21 21:07:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 21:07:25,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:07:25,896 INFO L175 Difference]: Start difference. First operand has 247 places, 356 transitions, 4227 flow. Second operand 8 states and 156 transitions. [2024-06-21 21:07:25,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 374 transitions, 5063 flow [2024-06-21 21:07:26,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 374 transitions, 4845 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:26,356 INFO L231 Difference]: Finished difference. Result has 249 places, 359 transitions, 4287 flow [2024-06-21 21:07:26,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4287, PETRI_PLACES=249, PETRI_TRANSITIONS=359} [2024-06-21 21:07:26,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 21:07:26,356 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 359 transitions, 4287 flow [2024-06-21 21:07:26,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:26,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:26,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:07:26,357 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:26,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1523546966, now seen corresponding path program 4 times [2024-06-21 21:07:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:26,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489200795] [2024-06-21 21:07:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:26,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489200795] [2024-06-21 21:07:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489200795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:26,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:26,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363968807] [2024-06-21 21:07:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:26,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:27,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:27,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 359 transitions, 4287 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:27,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:27,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:27,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:27,887 INFO L124 PetriNetUnfolderBase]: 2805/4425 cut-off events. [2024-06-21 21:07:27,887 INFO L125 PetriNetUnfolderBase]: For 472923/472925 co-relation queries the response was YES. [2024-06-21 21:07:27,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41634 conditions, 4425 events. 2805/4425 cut-off events. For 472923/472925 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24935 event pairs, 638 based on Foata normal form. 2/4418 useless extension candidates. Maximal degree in co-relation 41518. Up to 4014 conditions per place. [2024-06-21 21:07:27,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 315 selfloop transitions, 56 changer transitions 0/376 dead transitions. [2024-06-21 21:07:27,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 376 transitions, 5093 flow [2024-06-21 21:07:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:07:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:07:27,938 INFO L175 Difference]: Start difference. First operand has 249 places, 359 transitions, 4287 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:07:27,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 376 transitions, 5093 flow [2024-06-21 21:07:28,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 376 transitions, 4811 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:28,571 INFO L231 Difference]: Finished difference. Result has 251 places, 359 transitions, 4124 flow [2024-06-21 21:07:28,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4124, PETRI_PLACES=251, PETRI_TRANSITIONS=359} [2024-06-21 21:07:28,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-21 21:07:28,572 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 359 transitions, 4124 flow [2024-06-21 21:07:28,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:28,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:28,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:28,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:07:28,572 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:28,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1020303086, now seen corresponding path program 5 times [2024-06-21 21:07:28,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:28,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101138777] [2024-06-21 21:07:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:28,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101138777] [2024-06-21 21:07:29,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101138777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:29,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:29,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:29,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690399510] [2024-06-21 21:07:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:29,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:29,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:29,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:29,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 359 transitions, 4124 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:29,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:29,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:29,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:30,174 INFO L124 PetriNetUnfolderBase]: 2831/4475 cut-off events. [2024-06-21 21:07:30,174 INFO L125 PetriNetUnfolderBase]: For 489492/489494 co-relation queries the response was YES. [2024-06-21 21:07:30,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42078 conditions, 4475 events. 2831/4475 cut-off events. For 489492/489494 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25459 event pairs, 616 based on Foata normal form. 2/4468 useless extension candidates. Maximal degree in co-relation 41961. Up to 3943 conditions per place. [2024-06-21 21:07:30,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 298 selfloop transitions, 78 changer transitions 0/381 dead transitions. [2024-06-21 21:07:30,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 381 transitions, 5202 flow [2024-06-21 21:07:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:07:30,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:07:30,229 INFO L175 Difference]: Start difference. First operand has 251 places, 359 transitions, 4124 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:07:30,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 381 transitions, 5202 flow [2024-06-21 21:07:30,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 381 transitions, 4935 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:30,835 INFO L231 Difference]: Finished difference. Result has 252 places, 365 transitions, 4161 flow [2024-06-21 21:07:30,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4161, PETRI_PLACES=252, PETRI_TRANSITIONS=365} [2024-06-21 21:07:30,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 21:07:30,835 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 365 transitions, 4161 flow [2024-06-21 21:07:30,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:30,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:30,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:07:30,836 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1878225716, now seen corresponding path program 6 times [2024-06-21 21:07:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:30,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278726074] [2024-06-21 21:07:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278726074] [2024-06-21 21:07:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278726074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137652147] [2024-06-21 21:07:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:31,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:31,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 365 transitions, 4161 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:31,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:31,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:31,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:32,480 INFO L124 PetriNetUnfolderBase]: 2825/4467 cut-off events. [2024-06-21 21:07:32,480 INFO L125 PetriNetUnfolderBase]: For 495261/495263 co-relation queries the response was YES. [2024-06-21 21:07:32,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42078 conditions, 4467 events. 2825/4467 cut-off events. For 495261/495263 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 25417 event pairs, 607 based on Foata normal form. 2/4460 useless extension candidates. Maximal degree in co-relation 41959. Up to 3938 conditions per place. [2024-06-21 21:07:32,528 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 293 selfloop transitions, 82 changer transitions 0/380 dead transitions. [2024-06-21 21:07:32,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 380 transitions, 4973 flow [2024-06-21 21:07:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:07:32,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:07:32,529 INFO L175 Difference]: Start difference. First operand has 252 places, 365 transitions, 4161 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:07:32,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 380 transitions, 4973 flow [2024-06-21 21:07:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 380 transitions, 4745 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:33,167 INFO L231 Difference]: Finished difference. Result has 255 places, 365 transitions, 4103 flow [2024-06-21 21:07:33,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4103, PETRI_PLACES=255, PETRI_TRANSITIONS=365} [2024-06-21 21:07:33,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 21:07:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 365 transitions, 4103 flow [2024-06-21 21:07:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:33,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:33,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:07:33,168 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:33,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 125614516, now seen corresponding path program 7 times [2024-06-21 21:07:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:33,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410640827] [2024-06-21 21:07:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:33,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:33,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410640827] [2024-06-21 21:07:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410640827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:33,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:33,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094227417] [2024-06-21 21:07:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:34,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:34,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 365 transitions, 4103 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:34,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:34,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:34,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:34,847 INFO L124 PetriNetUnfolderBase]: 2845/4514 cut-off events. [2024-06-21 21:07:34,847 INFO L125 PetriNetUnfolderBase]: For 513207/513212 co-relation queries the response was YES. [2024-06-21 21:07:34,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42410 conditions, 4514 events. 2845/4514 cut-off events. For 513207/513212 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25810 event pairs, 617 based on Foata normal form. 6/4503 useless extension candidates. Maximal degree in co-relation 42290. Up to 3520 conditions per place. [2024-06-21 21:07:34,900 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 234 selfloop transitions, 147 changer transitions 0/386 dead transitions. [2024-06-21 21:07:34,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 386 transitions, 5446 flow [2024-06-21 21:07:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:07:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:07:34,901 INFO L175 Difference]: Start difference. First operand has 255 places, 365 transitions, 4103 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:07:34,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 386 transitions, 5446 flow [2024-06-21 21:07:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 386 transitions, 5278 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:35,630 INFO L231 Difference]: Finished difference. Result has 256 places, 369 transitions, 4317 flow [2024-06-21 21:07:35,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=256, PETRI_TRANSITIONS=369} [2024-06-21 21:07:35,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 21:07:35,631 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 369 transitions, 4317 flow [2024-06-21 21:07:35,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:35,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:35,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:35,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:07:35,632 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:35,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash 125377366, now seen corresponding path program 8 times [2024-06-21 21:07:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:35,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652610283] [2024-06-21 21:07:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652610283] [2024-06-21 21:07:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652610283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:36,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403283133] [2024-06-21 21:07:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:36,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:36,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:36,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 369 transitions, 4317 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:37,269 INFO L124 PetriNetUnfolderBase]: 2865/4546 cut-off events. [2024-06-21 21:07:37,269 INFO L125 PetriNetUnfolderBase]: For 527624/527629 co-relation queries the response was YES. [2024-06-21 21:07:37,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43212 conditions, 4546 events. 2865/4546 cut-off events. For 527624/527629 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26076 event pairs, 618 based on Foata normal form. 6/4535 useless extension candidates. Maximal degree in co-relation 43091. Up to 3530 conditions per place. [2024-06-21 21:07:37,325 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 154 changer transitions 0/392 dead transitions. [2024-06-21 21:07:37,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 392 transitions, 5745 flow [2024-06-21 21:07:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:07:37,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:07:37,326 INFO L175 Difference]: Start difference. First operand has 256 places, 369 transitions, 4317 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:07:37,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 392 transitions, 5745 flow [2024-06-21 21:07:38,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 392 transitions, 5421 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:38,011 INFO L231 Difference]: Finished difference. Result has 260 places, 375 transitions, 4475 flow [2024-06-21 21:07:38,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4475, PETRI_PLACES=260, PETRI_TRANSITIONS=375} [2024-06-21 21:07:38,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 21:07:38,012 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 375 transitions, 4475 flow [2024-06-21 21:07:38,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:38,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:38,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:07:38,012 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:38,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 525111826, now seen corresponding path program 9 times [2024-06-21 21:07:38,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831993410] [2024-06-21 21:07:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:38,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831993410] [2024-06-21 21:07:38,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831993410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:38,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943163504] [2024-06-21 21:07:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:38,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:38,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:38,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:38,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 375 transitions, 4475 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:38,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:38,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:38,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:39,674 INFO L124 PetriNetUnfolderBase]: 2853/4530 cut-off events. [2024-06-21 21:07:39,674 INFO L125 PetriNetUnfolderBase]: For 528570/528575 co-relation queries the response was YES. [2024-06-21 21:07:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 4530 events. 2853/4530 cut-off events. For 528570/528575 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26033 event pairs, 588 based on Foata normal form. 6/4519 useless extension candidates. Maximal degree in co-relation 42835. Up to 3522 conditions per place. [2024-06-21 21:07:39,729 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 162 changer transitions 0/391 dead transitions. [2024-06-21 21:07:39,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 391 transitions, 5613 flow [2024-06-21 21:07:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:07:39,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:07:39,730 INFO L175 Difference]: Start difference. First operand has 260 places, 375 transitions, 4475 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:07:39,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 391 transitions, 5613 flow [2024-06-21 21:07:40,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 391 transitions, 5264 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:40,483 INFO L231 Difference]: Finished difference. Result has 264 places, 375 transitions, 4458 flow [2024-06-21 21:07:40,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4458, PETRI_PLACES=264, PETRI_TRANSITIONS=375} [2024-06-21 21:07:40,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 21:07:40,483 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 375 transitions, 4458 flow [2024-06-21 21:07:40,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:40,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:40,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:40,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:07:40,484 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:40,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 530825746, now seen corresponding path program 10 times [2024-06-21 21:07:40,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:40,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746181462] [2024-06-21 21:07:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:40,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:41,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746181462] [2024-06-21 21:07:41,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746181462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:41,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745426180] [2024-06-21 21:07:41,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:41,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:41,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:41,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 375 transitions, 4458 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:42,193 INFO L124 PetriNetUnfolderBase]: 2863/4546 cut-off events. [2024-06-21 21:07:42,193 INFO L125 PetriNetUnfolderBase]: For 534415/534420 co-relation queries the response was YES. [2024-06-21 21:07:42,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43159 conditions, 4546 events. 2863/4546 cut-off events. For 534415/534420 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26161 event pairs, 587 based on Foata normal form. 4/4533 useless extension candidates. Maximal degree in co-relation 43035. Up to 3528 conditions per place. [2024-06-21 21:07:42,243 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 177 changer transitions 0/394 dead transitions. [2024-06-21 21:07:42,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 394 transitions, 5681 flow [2024-06-21 21:07:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:07:42,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:07:42,245 INFO L175 Difference]: Start difference. First operand has 264 places, 375 transitions, 4458 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:07:42,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 394 transitions, 5681 flow [2024-06-21 21:07:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 394 transitions, 5357 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:43,038 INFO L231 Difference]: Finished difference. Result has 266 places, 378 transitions, 4571 flow [2024-06-21 21:07:43,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4571, PETRI_PLACES=266, PETRI_TRANSITIONS=378} [2024-06-21 21:07:43,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 21:07:43,038 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 378 transitions, 4571 flow [2024-06-21 21:07:43,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:43,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:43,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:07:43,039 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:43,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 302924596, now seen corresponding path program 11 times [2024-06-21 21:07:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:43,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440365356] [2024-06-21 21:07:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:43,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:43,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440365356] [2024-06-21 21:07:43,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440365356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:43,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:43,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:43,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861964888] [2024-06-21 21:07:43,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:43,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:43,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:43,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:43,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:43,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 378 transitions, 4571 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:43,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:43,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:43,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:44,626 INFO L124 PetriNetUnfolderBase]: 2853/4528 cut-off events. [2024-06-21 21:07:44,627 INFO L125 PetriNetUnfolderBase]: For 540964/540969 co-relation queries the response was YES. [2024-06-21 21:07:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43117 conditions, 4528 events. 2853/4528 cut-off events. For 540964/540969 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26006 event pairs, 623 based on Foata normal form. 4/4515 useless extension candidates. Maximal degree in co-relation 42992. Up to 3520 conditions per place. [2024-06-21 21:07:44,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 213 selfloop transitions, 176 changer transitions 0/394 dead transitions. [2024-06-21 21:07:44,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 394 transitions, 5723 flow [2024-06-21 21:07:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:07:44,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:07:44,682 INFO L175 Difference]: Start difference. First operand has 266 places, 378 transitions, 4571 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:07:44,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 394 transitions, 5723 flow [2024-06-21 21:07:45,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 394 transitions, 5418 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:45,525 INFO L231 Difference]: Finished difference. Result has 270 places, 378 transitions, 4624 flow [2024-06-21 21:07:45,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4624, PETRI_PLACES=270, PETRI_TRANSITIONS=378} [2024-06-21 21:07:45,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 21:07:45,526 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 378 transitions, 4624 flow [2024-06-21 21:07:45,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:45,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:45,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:45,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:07:45,526 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:45,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash 302508886, now seen corresponding path program 12 times [2024-06-21 21:07:45,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083535711] [2024-06-21 21:07:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:46,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083535711] [2024-06-21 21:07:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083535711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146833451] [2024-06-21 21:07:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:46,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:46,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 378 transitions, 4624 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:46,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:46,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:46,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:47,102 INFO L124 PetriNetUnfolderBase]: 2843/4516 cut-off events. [2024-06-21 21:07:47,102 INFO L125 PetriNetUnfolderBase]: For 547285/547290 co-relation queries the response was YES. [2024-06-21 21:07:47,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43021 conditions, 4516 events. 2843/4516 cut-off events. For 547285/547290 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 25945 event pairs, 633 based on Foata normal form. 4/4503 useless extension candidates. Maximal degree in co-relation 42895. Up to 3512 conditions per place. [2024-06-21 21:07:47,156 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 174 changer transitions 0/393 dead transitions. [2024-06-21 21:07:47,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 393 transitions, 5622 flow [2024-06-21 21:07:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:07:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:07:47,157 INFO L175 Difference]: Start difference. First operand has 270 places, 378 transitions, 4624 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:07:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 393 transitions, 5622 flow [2024-06-21 21:07:48,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 393 transitions, 5068 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-21 21:07:48,012 INFO L231 Difference]: Finished difference. Result has 268 places, 378 transitions, 4424 flow [2024-06-21 21:07:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4424, PETRI_PLACES=268, PETRI_TRANSITIONS=378} [2024-06-21 21:07:48,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 21:07:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 378 transitions, 4424 flow [2024-06-21 21:07:48,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:48,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:07:48,013 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:48,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 171041790, now seen corresponding path program 4 times [2024-06-21 21:07:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154607389] [2024-06-21 21:07:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:48,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:48,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154607389] [2024-06-21 21:07:48,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154607389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:48,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:48,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:48,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152532511] [2024-06-21 21:07:48,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:48,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:07:48,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 378 transitions, 4424 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:48,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:48,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:07:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:49,889 INFO L124 PetriNetUnfolderBase]: 2768/4478 cut-off events. [2024-06-21 21:07:49,889 INFO L125 PetriNetUnfolderBase]: For 603065/603080 co-relation queries the response was YES. [2024-06-21 21:07:49,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43069 conditions, 4478 events. 2768/4478 cut-off events. For 603065/603080 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26577 event pairs, 580 based on Foata normal form. 24/4445 useless extension candidates. Maximal degree in co-relation 42944. Up to 3602 conditions per place. [2024-06-21 21:07:49,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 90 changer transitions 0/398 dead transitions. [2024-06-21 21:07:49,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 398 transitions, 5364 flow [2024-06-21 21:07:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 21:07:49,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:07:49,946 INFO L175 Difference]: Start difference. First operand has 268 places, 378 transitions, 4424 flow. Second operand 8 states and 156 transitions. [2024-06-21 21:07:49,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 398 transitions, 5364 flow [2024-06-21 21:07:50,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 398 transitions, 4855 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 21:07:50,836 INFO L231 Difference]: Finished difference. Result has 265 places, 380 transitions, 4195 flow [2024-06-21 21:07:50,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4195, PETRI_PLACES=265, PETRI_TRANSITIONS=380} [2024-06-21 21:07:50,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 21:07:50,837 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 380 transitions, 4195 flow [2024-06-21 21:07:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:50,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:50,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:50,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:07:50,837 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:50,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 125623010, now seen corresponding path program 5 times [2024-06-21 21:07:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:50,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074014679] [2024-06-21 21:07:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:51,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074014679] [2024-06-21 21:07:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074014679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:51,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:51,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588975110] [2024-06-21 21:07:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:51,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:51,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 380 transitions, 4195 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:51,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:51,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:51,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:52,592 INFO L124 PetriNetUnfolderBase]: 2962/4689 cut-off events. [2024-06-21 21:07:52,593 INFO L125 PetriNetUnfolderBase]: For 604118/604123 co-relation queries the response was YES. [2024-06-21 21:07:52,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 4689 events. 2962/4689 cut-off events. For 604118/604123 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26929 event pairs, 629 based on Foata normal form. 5/4677 useless extension candidates. Maximal degree in co-relation 45048. Up to 3341 conditions per place. [2024-06-21 21:07:52,645 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 251 selfloop transitions, 166 changer transitions 0/422 dead transitions. [2024-06-21 21:07:52,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 422 transitions, 6121 flow [2024-06-21 21:07:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:07:52,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:07:52,646 INFO L175 Difference]: Start difference. First operand has 265 places, 380 transitions, 4195 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:07:52,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 422 transitions, 6121 flow [2024-06-21 21:07:53,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 422 transitions, 5887 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:53,503 INFO L231 Difference]: Finished difference. Result has 270 places, 400 transitions, 4807 flow [2024-06-21 21:07:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4807, PETRI_PLACES=270, PETRI_TRANSITIONS=400} [2024-06-21 21:07:53,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 21:07:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 400 transitions, 4807 flow [2024-06-21 21:07:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:53,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:07:53,504 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:53,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 125623444, now seen corresponding path program 2 times [2024-06-21 21:07:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209416669] [2024-06-21 21:07:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209416669] [2024-06-21 21:07:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209416669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:54,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099235703] [2024-06-21 21:07:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:54,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:54,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 400 transitions, 4807 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:54,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:54,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:54,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:55,268 INFO L124 PetriNetUnfolderBase]: 2967/4682 cut-off events. [2024-06-21 21:07:55,268 INFO L125 PetriNetUnfolderBase]: For 616229/616243 co-relation queries the response was YES. [2024-06-21 21:07:55,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46534 conditions, 4682 events. 2967/4682 cut-off events. For 616229/616243 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26709 event pairs, 652 based on Foata normal form. 11/4689 useless extension candidates. Maximal degree in co-relation 46405. Up to 4344 conditions per place. [2024-06-21 21:07:55,326 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 49 changer transitions 0/419 dead transitions. [2024-06-21 21:07:55,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 419 transitions, 6069 flow [2024-06-21 21:07:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:07:55,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:07:55,327 INFO L175 Difference]: Start difference. First operand has 270 places, 400 transitions, 4807 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:07:55,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 419 transitions, 6069 flow [2024-06-21 21:07:56,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 419 transitions, 5854 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:56,234 INFO L231 Difference]: Finished difference. Result has 276 places, 406 transitions, 4938 flow [2024-06-21 21:07:56,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4938, PETRI_PLACES=276, PETRI_TRANSITIONS=406} [2024-06-21 21:07:56,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:07:56,234 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 406 transitions, 4938 flow [2024-06-21 21:07:56,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:56,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:56,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:56,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:07:56,235 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:56,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash 782412012, now seen corresponding path program 6 times [2024-06-21 21:07:56,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:56,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144226472] [2024-06-21 21:07:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:56,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:56,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144226472] [2024-06-21 21:07:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144226472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256077798] [2024-06-21 21:07:56,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:57,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:57,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 406 transitions, 4938 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:57,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:57,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:58,028 INFO L124 PetriNetUnfolderBase]: 2982/4721 cut-off events. [2024-06-21 21:07:58,028 INFO L125 PetriNetUnfolderBase]: For 638210/638215 co-relation queries the response was YES. [2024-06-21 21:07:58,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46951 conditions, 4721 events. 2982/4721 cut-off events. For 638210/638215 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27197 event pairs, 631 based on Foata normal form. 5/4709 useless extension candidates. Maximal degree in co-relation 46820. Up to 3362 conditions per place. [2024-06-21 21:07:58,089 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 170 changer transitions 0/432 dead transitions. [2024-06-21 21:07:58,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 432 transitions, 6667 flow [2024-06-21 21:07:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:07:58,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:07:58,090 INFO L175 Difference]: Start difference. First operand has 276 places, 406 transitions, 4938 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:07:58,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 432 transitions, 6667 flow [2024-06-21 21:07:59,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 432 transitions, 6501 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:59,127 INFO L231 Difference]: Finished difference. Result has 280 places, 410 transitions, 5250 flow [2024-06-21 21:07:59,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5250, PETRI_PLACES=280, PETRI_TRANSITIONS=410} [2024-06-21 21:07:59,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 21:07:59,128 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 410 transitions, 5250 flow [2024-06-21 21:07:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:59,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:59,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:59,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:07:59,128 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:07:59,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 125264960, now seen corresponding path program 7 times [2024-06-21 21:07:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:59,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732977847] [2024-06-21 21:07:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732977847] [2024-06-21 21:07:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732977847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:07:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909848221] [2024-06-21 21:07:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:59,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:07:59,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:07:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:07:59,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:59,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 410 transitions, 5250 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:00,939 INFO L124 PetriNetUnfolderBase]: 3005/4752 cut-off events. [2024-06-21 21:08:00,939 INFO L125 PetriNetUnfolderBase]: For 659265/659270 co-relation queries the response was YES. [2024-06-21 21:08:00,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48163 conditions, 4752 events. 3005/4752 cut-off events. For 659265/659270 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27330 event pairs, 636 based on Foata normal form. 5/4740 useless extension candidates. Maximal degree in co-relation 48030. Up to 3385 conditions per place. [2024-06-21 21:08:00,998 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 244 selfloop transitions, 189 changer transitions 0/438 dead transitions. [2024-06-21 21:08:00,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 438 transitions, 7019 flow [2024-06-21 21:08:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:08:00,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:08:00,999 INFO L175 Difference]: Start difference. First operand has 280 places, 410 transitions, 5250 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:08:00,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 438 transitions, 7019 flow [2024-06-21 21:08:01,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 438 transitions, 6590 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:01,924 INFO L231 Difference]: Finished difference. Result has 284 places, 419 transitions, 5600 flow [2024-06-21 21:08:01,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5600, PETRI_PLACES=284, PETRI_TRANSITIONS=419} [2024-06-21 21:08:01,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:08:01,925 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 419 transitions, 5600 flow [2024-06-21 21:08:01,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:01,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:01,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:08:01,926 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:01,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 525120754, now seen corresponding path program 3 times [2024-06-21 21:08:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090292298] [2024-06-21 21:08:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:02,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:02,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090292298] [2024-06-21 21:08:02,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090292298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:02,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:02,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:08:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782422592] [2024-06-21 21:08:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:08:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:08:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:08:02,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:02,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 419 transitions, 5600 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:02,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:02,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:02,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:03,707 INFO L124 PetriNetUnfolderBase]: 3010/4740 cut-off events. [2024-06-21 21:08:03,708 INFO L125 PetriNetUnfolderBase]: For 668211/668225 co-relation queries the response was YES. [2024-06-21 21:08:03,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48687 conditions, 4740 events. 3010/4740 cut-off events. For 668211/668225 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26999 event pairs, 656 based on Foata normal form. 11/4747 useless extension candidates. Maximal degree in co-relation 48552. Up to 4403 conditions per place. [2024-06-21 21:08:03,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 376 selfloop transitions, 54 changer transitions 0/435 dead transitions. [2024-06-21 21:08:03,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 435 transitions, 6774 flow [2024-06-21 21:08:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:08:03,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:08:03,769 INFO L175 Difference]: Start difference. First operand has 284 places, 419 transitions, 5600 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:08:03,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 435 transitions, 6774 flow [2024-06-21 21:08:04,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 435 transitions, 6478 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-21 21:08:04,827 INFO L231 Difference]: Finished difference. Result has 289 places, 422 transitions, 5528 flow [2024-06-21 21:08:04,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5528, PETRI_PLACES=289, PETRI_TRANSITIONS=422} [2024-06-21 21:08:04,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 21:08:04,827 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 422 transitions, 5528 flow [2024-06-21 21:08:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:04,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:04,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:08:04,828 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:04,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash 525120320, now seen corresponding path program 8 times [2024-06-21 21:08:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665012917] [2024-06-21 21:08:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:05,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665012917] [2024-06-21 21:08:05,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665012917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:05,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:05,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518124823] [2024-06-21 21:08:05,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:05,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:05,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 422 transitions, 5528 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:05,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:05,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:05,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:06,646 INFO L124 PetriNetUnfolderBase]: 3085/4874 cut-off events. [2024-06-21 21:08:06,646 INFO L125 PetriNetUnfolderBase]: For 710354/710359 co-relation queries the response was YES. [2024-06-21 21:08:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50350 conditions, 4874 events. 3085/4874 cut-off events. For 710354/710359 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28137 event pairs, 587 based on Foata normal form. 5/4862 useless extension candidates. Maximal degree in co-relation 50213. Up to 3456 conditions per place. [2024-06-21 21:08:06,712 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 253 selfloop transitions, 195 changer transitions 0/453 dead transitions. [2024-06-21 21:08:06,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 453 transitions, 7374 flow [2024-06-21 21:08:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:08:06,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:08:06,713 INFO L175 Difference]: Start difference. First operand has 289 places, 422 transitions, 5528 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:08:06,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 453 transitions, 7374 flow [2024-06-21 21:08:07,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 453 transitions, 7160 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:07,851 INFO L231 Difference]: Finished difference. Result has 292 places, 433 transitions, 6035 flow [2024-06-21 21:08:07,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6035, PETRI_PLACES=292, PETRI_TRANSITIONS=433} [2024-06-21 21:08:07,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 21:08:07,852 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 433 transitions, 6035 flow [2024-06-21 21:08:07,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:07,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:07,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:07,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:08:07,852 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:07,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash 525108230, now seen corresponding path program 9 times [2024-06-21 21:08:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497608513] [2024-06-21 21:08:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:07,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:08,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497608513] [2024-06-21 21:08:08,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497608513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:08,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:08,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:08,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012484632] [2024-06-21 21:08:08,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:08,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:08,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 433 transitions, 6035 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:08,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:08,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:08,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:09,631 INFO L124 PetriNetUnfolderBase]: 3076/4863 cut-off events. [2024-06-21 21:08:09,631 INFO L125 PetriNetUnfolderBase]: For 716423/716428 co-relation queries the response was YES. [2024-06-21 21:08:09,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50876 conditions, 4863 events. 3076/4863 cut-off events. For 716423/716428 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28046 event pairs, 583 based on Foata normal form. 5/4851 useless extension candidates. Maximal degree in co-relation 50737. Up to 3449 conditions per place. [2024-06-21 21:08:09,697 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 248 selfloop transitions, 200 changer transitions 0/453 dead transitions. [2024-06-21 21:08:09,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 453 transitions, 7586 flow [2024-06-21 21:08:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:08:09,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:08:09,699 INFO L175 Difference]: Start difference. First operand has 292 places, 433 transitions, 6035 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:08:09,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 453 transitions, 7586 flow [2024-06-21 21:08:10,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 453 transitions, 7166 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 21:08:10,953 INFO L231 Difference]: Finished difference. Result has 296 places, 434 transitions, 6083 flow [2024-06-21 21:08:10,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6083, PETRI_PLACES=296, PETRI_TRANSITIONS=434} [2024-06-21 21:08:10,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 21:08:10,954 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 434 transitions, 6083 flow [2024-06-21 21:08:10,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:10,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:10,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:08:10,954 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:10,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 539405554, now seen corresponding path program 4 times [2024-06-21 21:08:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:10,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903318569] [2024-06-21 21:08:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:10,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:11,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903318569] [2024-06-21 21:08:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903318569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:08:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339896575] [2024-06-21 21:08:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:08:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:08:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:08:11,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:11,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 434 transitions, 6083 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:11,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:11,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:11,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:12,930 INFO L124 PetriNetUnfolderBase]: 3081/4845 cut-off events. [2024-06-21 21:08:12,931 INFO L125 PetriNetUnfolderBase]: For 723052/723054 co-relation queries the response was YES. [2024-06-21 21:08:12,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50961 conditions, 4845 events. 3081/4845 cut-off events. For 723052/723054 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27743 event pairs, 718 based on Foata normal form. 1/4844 useless extension candidates. Maximal degree in co-relation 50821. Up to 4569 conditions per place. [2024-06-21 21:08:12,994 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 21 changer transitions 0/448 dead transitions. [2024-06-21 21:08:12,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 7105 flow [2024-06-21 21:08:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:08:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:08:12,995 INFO L175 Difference]: Start difference. First operand has 296 places, 434 transitions, 6083 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:08:12,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 7105 flow [2024-06-21 21:08:14,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 448 transitions, 6600 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:14,252 INFO L231 Difference]: Finished difference. Result has 298 places, 437 transitions, 5740 flow [2024-06-21 21:08:14,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5578, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5740, PETRI_PLACES=298, PETRI_TRANSITIONS=437} [2024-06-21 21:08:14,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 21:08:14,252 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 437 transitions, 5740 flow [2024-06-21 21:08:14,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:14,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:14,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:14,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:08:14,253 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:14,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash 538929890, now seen corresponding path program 10 times [2024-06-21 21:08:14,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:14,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606047135] [2024-06-21 21:08:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606047135] [2024-06-21 21:08:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606047135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217604542] [2024-06-21 21:08:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:15,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:15,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 437 transitions, 5740 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:15,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:15,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:16,057 INFO L124 PetriNetUnfolderBase]: 3076/4865 cut-off events. [2024-06-21 21:08:16,057 INFO L125 PetriNetUnfolderBase]: For 730806/730811 co-relation queries the response was YES. [2024-06-21 21:08:16,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49852 conditions, 4865 events. 3076/4865 cut-off events. For 730806/730811 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28112 event pairs, 582 based on Foata normal form. 5/4853 useless extension candidates. Maximal degree in co-relation 49712. Up to 3454 conditions per place. [2024-06-21 21:08:16,123 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 217 changer transitions 0/456 dead transitions. [2024-06-21 21:08:16,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 456 transitions, 7248 flow [2024-06-21 21:08:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:08:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:08:16,124 INFO L175 Difference]: Start difference. First operand has 298 places, 437 transitions, 5740 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:08:16,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 456 transitions, 7248 flow [2024-06-21 21:08:17,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 456 transitions, 7024 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:17,498 INFO L231 Difference]: Finished difference. Result has 300 places, 437 transitions, 5958 flow [2024-06-21 21:08:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5958, PETRI_PLACES=300, PETRI_TRANSITIONS=437} [2024-06-21 21:08:17,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 21:08:17,499 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 437 transitions, 5958 flow [2024-06-21 21:08:17,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:17,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:17,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:08:17,500 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:17,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 538930324, now seen corresponding path program 5 times [2024-06-21 21:08:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244168262] [2024-06-21 21:08:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244168262] [2024-06-21 21:08:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244168262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:18,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:08:18,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420384689] [2024-06-21 21:08:18,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:18,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:08:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:08:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:08:18,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:18,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 437 transitions, 5958 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:18,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:18,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:18,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:19,281 INFO L124 PetriNetUnfolderBase]: 3073/4847 cut-off events. [2024-06-21 21:08:19,281 INFO L125 PetriNetUnfolderBase]: For 737332/737346 co-relation queries the response was YES. [2024-06-21 21:08:19,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50608 conditions, 4847 events. 3073/4847 cut-off events. For 737332/737346 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27773 event pairs, 662 based on Foata normal form. 11/4854 useless extension candidates. Maximal degree in co-relation 50467. Up to 4492 conditions per place. [2024-06-21 21:08:19,345 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 60 changer transitions 0/449 dead transitions. [2024-06-21 21:08:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 449 transitions, 6882 flow [2024-06-21 21:08:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:08:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:08:19,346 INFO L175 Difference]: Start difference. First operand has 300 places, 437 transitions, 5958 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:08:19,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 449 transitions, 6882 flow [2024-06-21 21:08:20,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 449 transitions, 6378 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:20,914 INFO L231 Difference]: Finished difference. Result has 301 places, 437 transitions, 5580 flow [2024-06-21 21:08:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5580, PETRI_PLACES=301, PETRI_TRANSITIONS=437} [2024-06-21 21:08:20,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 21:08:20,915 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 437 transitions, 5580 flow [2024-06-21 21:08:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:20,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:20,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:08:20,915 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash 9872796, now seen corresponding path program 5 times [2024-06-21 21:08:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:20,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888152619] [2024-06-21 21:08:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888152619] [2024-06-21 21:08:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888152619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:21,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868027585] [2024-06-21 21:08:21,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:21,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:21,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:08:21,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 437 transitions, 5580 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:21,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:21,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:08:21,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:22,807 INFO L124 PetriNetUnfolderBase]: 3114/4988 cut-off events. [2024-06-21 21:08:22,807 INFO L125 PetriNetUnfolderBase]: For 802311/802320 co-relation queries the response was YES. [2024-06-21 21:08:22,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51509 conditions, 4988 events. 3114/4988 cut-off events. For 802311/802320 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29498 event pairs, 622 based on Foata normal form. 20/5000 useless extension candidates. Maximal degree in co-relation 51368. Up to 4177 conditions per place. [2024-06-21 21:08:22,875 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 386 selfloop transitions, 74 changer transitions 0/499 dead transitions. [2024-06-21 21:08:22,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 499 transitions, 7244 flow [2024-06-21 21:08:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 21:08:22,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 21:08:22,876 INFO L175 Difference]: Start difference. First operand has 301 places, 437 transitions, 5580 flow. Second operand 9 states and 181 transitions. [2024-06-21 21:08:22,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 499 transitions, 7244 flow [2024-06-21 21:08:24,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 499 transitions, 7090 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:24,401 INFO L231 Difference]: Finished difference. Result has 306 places, 467 transitions, 6247 flow [2024-06-21 21:08:24,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5434, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6247, PETRI_PLACES=306, PETRI_TRANSITIONS=467} [2024-06-21 21:08:24,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 21:08:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 467 transitions, 6247 flow [2024-06-21 21:08:24,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:24,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:24,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:08:24,403 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:24,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1123383558, now seen corresponding path program 6 times [2024-06-21 21:08:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955328696] [2024-06-21 21:08:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:25,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955328696] [2024-06-21 21:08:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955328696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:25,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733191892] [2024-06-21 21:08:25,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:25,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:25,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:08:25,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 467 transitions, 6247 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:25,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:25,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:08:25,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:26,275 INFO L124 PetriNetUnfolderBase]: 3242/5186 cut-off events. [2024-06-21 21:08:26,275 INFO L125 PetriNetUnfolderBase]: For 782849/782858 co-relation queries the response was YES. [2024-06-21 21:08:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54109 conditions, 5186 events. 3242/5186 cut-off events. For 782849/782858 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30780 event pairs, 639 based on Foata normal form. 10/5188 useless extension candidates. Maximal degree in co-relation 53963. Up to 4352 conditions per place. [2024-06-21 21:08:26,344 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 390 selfloop transitions, 91 changer transitions 0/520 dead transitions. [2024-06-21 21:08:26,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 520 transitions, 7889 flow [2024-06-21 21:08:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 21:08:26,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 21:08:26,346 INFO L175 Difference]: Start difference. First operand has 306 places, 467 transitions, 6247 flow. Second operand 9 states and 182 transitions. [2024-06-21 21:08:26,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 520 transitions, 7889 flow [2024-06-21 21:08:27,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 520 transitions, 7659 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 21:08:27,765 INFO L231 Difference]: Finished difference. Result has 312 places, 489 transitions, 6794 flow [2024-06-21 21:08:27,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6794, PETRI_PLACES=312, PETRI_TRANSITIONS=489} [2024-06-21 21:08:27,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 21:08:27,766 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 489 transitions, 6794 flow [2024-06-21 21:08:27,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:27,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:27,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:27,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:08:27,766 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:27,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1355318786, now seen corresponding path program 13 times [2024-06-21 21:08:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110910994] [2024-06-21 21:08:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:27,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110910994] [2024-06-21 21:08:28,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110910994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:28,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:28,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:28,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34877298] [2024-06-21 21:08:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:28,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:28,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:28,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:28,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 489 transitions, 6794 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:28,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:28,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:28,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:29,839 INFO L124 PetriNetUnfolderBase]: 3539/5585 cut-off events. [2024-06-21 21:08:29,839 INFO L125 PetriNetUnfolderBase]: For 783388/783391 co-relation queries the response was YES. [2024-06-21 21:08:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56394 conditions, 5585 events. 3539/5585 cut-off events. For 783388/783391 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32971 event pairs, 683 based on Foata normal form. 6/5587 useless extension candidates. Maximal degree in co-relation 56247. Up to 4696 conditions per place. [2024-06-21 21:08:29,908 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 412 selfloop transitions, 144 changer transitions 0/561 dead transitions. [2024-06-21 21:08:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 561 transitions, 8689 flow [2024-06-21 21:08:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:08:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:08:29,909 INFO L175 Difference]: Start difference. First operand has 312 places, 489 transitions, 6794 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:08:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 561 transitions, 8689 flow [2024-06-21 21:08:31,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 561 transitions, 8391 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:31,347 INFO L231 Difference]: Finished difference. Result has 317 places, 527 transitions, 7554 flow [2024-06-21 21:08:31,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7554, PETRI_PLACES=317, PETRI_TRANSITIONS=527} [2024-06-21 21:08:31,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:08:31,347 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 527 transitions, 7554 flow [2024-06-21 21:08:31,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:31,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:31,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:31,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:08:31,348 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:31,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash 707989368, now seen corresponding path program 1 times [2024-06-21 21:08:31,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:31,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174810263] [2024-06-21 21:08:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:32,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174810263] [2024-06-21 21:08:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174810263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:32,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:32,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:32,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637452827] [2024-06-21 21:08:32,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:32,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:32,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:32,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:08:32,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 527 transitions, 7554 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:32,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:32,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:08:32,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:33,365 INFO L124 PetriNetUnfolderBase]: 3339/5364 cut-off events. [2024-06-21 21:08:33,366 INFO L125 PetriNetUnfolderBase]: For 794054/794056 co-relation queries the response was YES. [2024-06-21 21:08:33,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55880 conditions, 5364 events. 3339/5364 cut-off events. For 794054/794056 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32475 event pairs, 743 based on Foata normal form. 2/5358 useless extension candidates. Maximal degree in co-relation 55730. Up to 4561 conditions per place. [2024-06-21 21:08:33,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 463 selfloop transitions, 19 changer transitions 0/550 dead transitions. [2024-06-21 21:08:33,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 550 transitions, 8664 flow [2024-06-21 21:08:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 21:08:33,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:08:33,442 INFO L175 Difference]: Start difference. First operand has 317 places, 527 transitions, 7554 flow. Second operand 8 states and 156 transitions. [2024-06-21 21:08:33,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 550 transitions, 8664 flow [2024-06-21 21:08:35,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 550 transitions, 8332 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:35,212 INFO L231 Difference]: Finished difference. Result has 317 places, 529 transitions, 7339 flow [2024-06-21 21:08:35,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7222, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7339, PETRI_PLACES=317, PETRI_TRANSITIONS=529} [2024-06-21 21:08:35,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:08:35,212 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 529 transitions, 7339 flow [2024-06-21 21:08:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:35,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:35,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:08:35,213 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:35,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1762764728, now seen corresponding path program 2 times [2024-06-21 21:08:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610118104] [2024-06-21 21:08:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610118104] [2024-06-21 21:08:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610118104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:36,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924558586] [2024-06-21 21:08:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:36,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:36,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:08:36,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 529 transitions, 7339 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:36,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:36,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:08:36,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:37,400 INFO L124 PetriNetUnfolderBase]: 3347/5381 cut-off events. [2024-06-21 21:08:37,400 INFO L125 PetriNetUnfolderBase]: For 808069/808071 co-relation queries the response was YES. [2024-06-21 21:08:37,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55743 conditions, 5381 events. 3347/5381 cut-off events. For 808069/808071 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32614 event pairs, 779 based on Foata normal form. 2/5375 useless extension candidates. Maximal degree in co-relation 55592. Up to 4590 conditions per place. [2024-06-21 21:08:37,477 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 460 selfloop transitions, 20 changer transitions 0/548 dead transitions. [2024-06-21 21:08:37,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 548 transitions, 8433 flow [2024-06-21 21:08:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:08:37,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:08:37,478 INFO L175 Difference]: Start difference. First operand has 317 places, 529 transitions, 7339 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:08:37,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 548 transitions, 8433 flow [2024-06-21 21:08:39,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 548 transitions, 8332 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:39,404 INFO L231 Difference]: Finished difference. Result has 319 places, 531 transitions, 7361 flow [2024-06-21 21:08:39,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7238, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7361, PETRI_PLACES=319, PETRI_TRANSITIONS=531} [2024-06-21 21:08:39,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 21:08:39,404 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 531 transitions, 7361 flow [2024-06-21 21:08:39,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:39,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:39,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:08:39,405 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:39,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1762769688, now seen corresponding path program 1 times [2024-06-21 21:08:39,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:39,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568873589] [2024-06-21 21:08:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:40,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:40,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568873589] [2024-06-21 21:08:40,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568873589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:40,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:40,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144867378] [2024-06-21 21:08:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:40,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:08:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 531 transitions, 7361 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:08:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:41,742 INFO L124 PetriNetUnfolderBase]: 3470/5506 cut-off events. [2024-06-21 21:08:41,743 INFO L125 PetriNetUnfolderBase]: For 813181/813181 co-relation queries the response was YES. [2024-06-21 21:08:41,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56380 conditions, 5506 events. 3470/5506 cut-off events. For 813181/813181 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32734 event pairs, 825 based on Foata normal form. 2/5506 useless extension candidates. Maximal degree in co-relation 56228. Up to 4968 conditions per place. [2024-06-21 21:08:41,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 501 selfloop transitions, 24 changer transitions 0/551 dead transitions. [2024-06-21 21:08:41,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 551 transitions, 8563 flow [2024-06-21 21:08:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:08:41,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:08:41,822 INFO L175 Difference]: Start difference. First operand has 319 places, 531 transitions, 7361 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:08:41,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 551 transitions, 8563 flow [2024-06-21 21:08:43,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 551 transitions, 8456 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:43,730 INFO L231 Difference]: Finished difference. Result has 322 places, 534 transitions, 7406 flow [2024-06-21 21:08:43,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7254, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7406, PETRI_PLACES=322, PETRI_TRANSITIONS=534} [2024-06-21 21:08:43,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 21:08:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 534 transitions, 7406 flow [2024-06-21 21:08:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:08:43,731 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:43,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:43,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1002208138, now seen corresponding path program 3 times [2024-06-21 21:08:43,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984252613] [2024-06-21 21:08:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:44,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:44,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984252613] [2024-06-21 21:08:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984252613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:44,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:44,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568278424] [2024-06-21 21:08:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:44,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:44,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:44,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:44,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:44,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:08:44,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 534 transitions, 7406 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:44,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:44,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:08:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:45,805 INFO L124 PetriNetUnfolderBase]: 3347/5385 cut-off events. [2024-06-21 21:08:45,805 INFO L125 PetriNetUnfolderBase]: For 833840/833844 co-relation queries the response was YES. [2024-06-21 21:08:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56078 conditions, 5385 events. 3347/5385 cut-off events. For 833840/833844 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32687 event pairs, 773 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 55925. Up to 4602 conditions per place. [2024-06-21 21:08:45,882 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 465 selfloop transitions, 20 changer transitions 0/553 dead transitions. [2024-06-21 21:08:45,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 553 transitions, 8532 flow [2024-06-21 21:08:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:08:45,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:08:45,883 INFO L175 Difference]: Start difference. First operand has 322 places, 534 transitions, 7406 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:08:45,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 553 transitions, 8532 flow [2024-06-21 21:08:47,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 553 transitions, 8408 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:47,746 INFO L231 Difference]: Finished difference. Result has 324 places, 539 transitions, 7448 flow [2024-06-21 21:08:47,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7282, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7448, PETRI_PLACES=324, PETRI_TRANSITIONS=539} [2024-06-21 21:08:47,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 21:08:47,747 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 539 transitions, 7448 flow [2024-06-21 21:08:47,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:47,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:47,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:47,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:08:47,747 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:47,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 597538432, now seen corresponding path program 4 times [2024-06-21 21:08:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:47,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179196321] [2024-06-21 21:08:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179196321] [2024-06-21 21:08:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179196321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466863368] [2024-06-21 21:08:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:48,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:08:48,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 539 transitions, 7448 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:48,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:48,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:08:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:49,983 INFO L124 PetriNetUnfolderBase]: 3342/5378 cut-off events. [2024-06-21 21:08:49,983 INFO L125 PetriNetUnfolderBase]: For 840943/840952 co-relation queries the response was YES. [2024-06-21 21:08:50,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56222 conditions, 5378 events. 3342/5378 cut-off events. For 840943/840952 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32661 event pairs, 769 based on Foata normal form. 4/5360 useless extension candidates. Maximal degree in co-relation 56067. Up to 4586 conditions per place. [2024-06-21 21:08:50,064 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 28 changer transitions 0/556 dead transitions. [2024-06-21 21:08:50,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 556 transitions, 8580 flow [2024-06-21 21:08:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:08:50,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:08:50,065 INFO L175 Difference]: Start difference. First operand has 324 places, 539 transitions, 7448 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:08:50,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 556 transitions, 8580 flow [2024-06-21 21:08:51,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 556 transitions, 8461 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 21:08:51,894 INFO L231 Difference]: Finished difference. Result has 329 places, 544 transitions, 7516 flow [2024-06-21 21:08:51,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7516, PETRI_PLACES=329, PETRI_TRANSITIONS=544} [2024-06-21 21:08:51,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 21:08:51,894 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 544 transitions, 7516 flow [2024-06-21 21:08:51,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 21:08:51,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:51,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:51,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:08:51,895 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:51,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 539422418, now seen corresponding path program 1 times [2024-06-21 21:08:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:51,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391955364] [2024-06-21 21:08:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391955364] [2024-06-21 21:08:52,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391955364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:52,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:08:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613637630] [2024-06-21 21:08:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:52,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:08:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:08:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:08:52,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:52,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 544 transitions, 7516 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:52,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:52,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:54,180 INFO L124 PetriNetUnfolderBase]: 3547/5590 cut-off events. [2024-06-21 21:08:54,181 INFO L125 PetriNetUnfolderBase]: For 847802/847802 co-relation queries the response was YES. [2024-06-21 21:08:54,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57787 conditions, 5590 events. 3547/5590 cut-off events. For 847802/847802 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32949 event pairs, 843 based on Foata normal form. 2/5590 useless extension candidates. Maximal degree in co-relation 57630. Up to 5248 conditions per place. [2024-06-21 21:08:54,261 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 531 selfloop transitions, 23 changer transitions 0/559 dead transitions. [2024-06-21 21:08:54,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 559 transitions, 8774 flow [2024-06-21 21:08:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:08:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:08:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 21:08:54,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 21:08:54,262 INFO L175 Difference]: Start difference. First operand has 329 places, 544 transitions, 7516 flow. Second operand 10 states and 161 transitions. [2024-06-21 21:08:54,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 559 transitions, 8774 flow [2024-06-21 21:08:56,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 559 transitions, 8633 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:56,035 INFO L231 Difference]: Finished difference. Result has 333 places, 546 transitions, 7544 flow [2024-06-21 21:08:56,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7375, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7544, PETRI_PLACES=333, PETRI_TRANSITIONS=546} [2024-06-21 21:08:56,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 21:08:56,036 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 546 transitions, 7544 flow [2024-06-21 21:08:56,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:56,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:56,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:56,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:08:56,036 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:56,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1565624974, now seen corresponding path program 1 times [2024-06-21 21:08:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:56,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264090263] [2024-06-21 21:08:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264090263] [2024-06-21 21:08:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264090263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:56,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:56,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:56,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447679236] [2024-06-21 21:08:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:56,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:56,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:56,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:08:56,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 546 transitions, 7544 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:56,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:56,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:08:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:58,140 INFO L124 PetriNetUnfolderBase]: 3434/5494 cut-off events. [2024-06-21 21:08:58,140 INFO L125 PetriNetUnfolderBase]: For 857692/857696 co-relation queries the response was YES. [2024-06-21 21:08:58,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57254 conditions, 5494 events. 3434/5494 cut-off events. For 857692/857696 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33238 event pairs, 691 based on Foata normal form. 5/5481 useless extension candidates. Maximal degree in co-relation 57096. Up to 4578 conditions per place. [2024-06-21 21:08:58,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 443 selfloop transitions, 86 changer transitions 0/576 dead transitions. [2024-06-21 21:08:58,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 576 transitions, 8834 flow [2024-06-21 21:08:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 21:08:58,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-21 21:08:58,221 INFO L175 Difference]: Start difference. First operand has 333 places, 546 transitions, 7544 flow. Second operand 8 states and 162 transitions. [2024-06-21 21:08:58,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 576 transitions, 8834 flow [2024-06-21 21:08:59,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 576 transitions, 8681 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:59,982 INFO L231 Difference]: Finished difference. Result has 333 places, 552 transitions, 7715 flow [2024-06-21 21:08:59,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7715, PETRI_PLACES=333, PETRI_TRANSITIONS=552} [2024-06-21 21:08:59,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 21:08:59,983 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 552 transitions, 7715 flow [2024-06-21 21:08:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:59,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:59,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:59,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:08:59,983 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:08:59,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash 38235978, now seen corresponding path program 2 times [2024-06-21 21:08:59,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:59,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041070707] [2024-06-21 21:08:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041070707] [2024-06-21 21:09:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041070707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813040822] [2024-06-21 21:09:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:00,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:09:00,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 552 transitions, 7715 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:09:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:02,132 INFO L124 PetriNetUnfolderBase]: 3439/5499 cut-off events. [2024-06-21 21:09:02,132 INFO L125 PetriNetUnfolderBase]: For 876336/876336 co-relation queries the response was YES. [2024-06-21 21:09:02,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57995 conditions, 5499 events. 3439/5499 cut-off events. For 876336/876336 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33172 event pairs, 663 based on Foata normal form. 1/5482 useless extension candidates. Maximal degree in co-relation 57836. Up to 4585 conditions per place. [2024-06-21 21:09:02,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 75 changer transitions 0/577 dead transitions. [2024-06-21 21:09:02,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 577 transitions, 8981 flow [2024-06-21 21:09:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 21:09:02,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 21:09:02,213 INFO L175 Difference]: Start difference. First operand has 333 places, 552 transitions, 7715 flow. Second operand 8 states and 158 transitions. [2024-06-21 21:09:02,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 577 transitions, 8981 flow [2024-06-21 21:09:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 577 transitions, 8715 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:04,181 INFO L231 Difference]: Finished difference. Result has 336 places, 555 transitions, 7731 flow [2024-06-21 21:09:04,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7731, PETRI_PLACES=336, PETRI_TRANSITIONS=555} [2024-06-21 21:09:04,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 21:09:04,181 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 555 transitions, 7731 flow [2024-06-21 21:09:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:04,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:04,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:09:04,182 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:04,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1571285884, now seen corresponding path program 3 times [2024-06-21 21:09:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034802970] [2024-06-21 21:09:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:05,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:05,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034802970] [2024-06-21 21:09:05,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034802970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:05,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:05,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281178335] [2024-06-21 21:09:05,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:05,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:05,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:05,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:09:05,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 555 transitions, 7731 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:05,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:05,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:09:05,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:06,319 INFO L124 PetriNetUnfolderBase]: 3444/5506 cut-off events. [2024-06-21 21:09:06,320 INFO L125 PetriNetUnfolderBase]: For 896231/896231 co-relation queries the response was YES. [2024-06-21 21:09:06,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58566 conditions, 5506 events. 3444/5506 cut-off events. For 896231/896231 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33234 event pairs, 663 based on Foata normal form. 1/5489 useless extension candidates. Maximal degree in co-relation 58406. Up to 4575 conditions per place. [2024-06-21 21:09:06,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 86 changer transitions 0/577 dead transitions. [2024-06-21 21:09:06,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 577 transitions, 8989 flow [2024-06-21 21:09:06,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 21:09:06,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:09:06,400 INFO L175 Difference]: Start difference. First operand has 336 places, 555 transitions, 7731 flow. Second operand 8 states and 156 transitions. [2024-06-21 21:09:06,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 577 transitions, 8989 flow [2024-06-21 21:09:08,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 577 transitions, 8710 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:08,727 INFO L231 Difference]: Finished difference. Result has 338 places, 558 transitions, 7763 flow [2024-06-21 21:09:08,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7452, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7763, PETRI_PLACES=338, PETRI_TRANSITIONS=558} [2024-06-21 21:09:08,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 21:09:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 558 transitions, 7763 flow [2024-06-21 21:09:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:08,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:09:08,728 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:08,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -962136374, now seen corresponding path program 1 times [2024-06-21 21:09:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:08,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478875374] [2024-06-21 21:09:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:09,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478875374] [2024-06-21 21:09:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478875374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:09,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:09,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004626935] [2024-06-21 21:09:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:09,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:09,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:09,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:09,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 558 transitions, 7763 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:10,999 INFO L124 PetriNetUnfolderBase]: 3583/5643 cut-off events. [2024-06-21 21:09:10,999 INFO L125 PetriNetUnfolderBase]: For 917910/917910 co-relation queries the response was YES. [2024-06-21 21:09:11,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60039 conditions, 5643 events. 3583/5643 cut-off events. For 917910/917910 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33304 event pairs, 702 based on Foata normal form. 2/5639 useless extension candidates. Maximal degree in co-relation 59878. Up to 4982 conditions per place. [2024-06-21 21:09:11,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 83 changer transitions 0/585 dead transitions. [2024-06-21 21:09:11,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 585 transitions, 9159 flow [2024-06-21 21:09:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:09:11,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:09:11,085 INFO L175 Difference]: Start difference. First operand has 338 places, 558 transitions, 7763 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:09:11,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 585 transitions, 9159 flow [2024-06-21 21:09:13,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 585 transitions, 8872 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:13,322 INFO L231 Difference]: Finished difference. Result has 341 places, 562 transitions, 7803 flow [2024-06-21 21:09:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7803, PETRI_PLACES=341, PETRI_TRANSITIONS=562} [2024-06-21 21:09:13,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 21:09:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 562 transitions, 7803 flow [2024-06-21 21:09:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:13,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:13,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:09:13,323 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:13,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:13,323 INFO L85 PathProgramCache]: Analyzing trace with hash -61567201, now seen corresponding path program 1 times [2024-06-21 21:09:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:13,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577193894] [2024-06-21 21:09:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:13,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:14,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577193894] [2024-06-21 21:09:14,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577193894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:14,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:14,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:14,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927523018] [2024-06-21 21:09:14,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:14,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:14,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 562 transitions, 7803 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:14,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:14,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:14,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:15,552 INFO L124 PetriNetUnfolderBase]: 3603/5682 cut-off events. [2024-06-21 21:09:15,552 INFO L125 PetriNetUnfolderBase]: For 949134/949137 co-relation queries the response was YES. [2024-06-21 21:09:15,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60898 conditions, 5682 events. 3603/5682 cut-off events. For 949134/949137 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 33675 event pairs, 681 based on Foata normal form. 6/5677 useless extension candidates. Maximal degree in co-relation 60736. Up to 5066 conditions per place. [2024-06-21 21:09:15,628 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 504 selfloop transitions, 80 changer transitions 0/589 dead transitions. [2024-06-21 21:09:15,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 589 transitions, 9206 flow [2024-06-21 21:09:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 21:09:15,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 21:09:15,629 INFO L175 Difference]: Start difference. First operand has 341 places, 562 transitions, 7803 flow. Second operand 10 states and 179 transitions. [2024-06-21 21:09:15,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 589 transitions, 9206 flow [2024-06-21 21:09:17,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 589 transitions, 8905 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:17,989 INFO L231 Difference]: Finished difference. Result has 347 places, 569 transitions, 7865 flow [2024-06-21 21:09:17,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7504, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7865, PETRI_PLACES=347, PETRI_TRANSITIONS=569} [2024-06-21 21:09:17,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 21:09:17,990 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 569 transitions, 7865 flow [2024-06-21 21:09:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:17,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:17,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:09:17,990 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:17,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 237698317, now seen corresponding path program 2 times [2024-06-21 21:09:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:17,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667325507] [2024-06-21 21:09:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:17,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667325507] [2024-06-21 21:09:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667325507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:18,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:18,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522044785] [2024-06-21 21:09:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:18,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:18,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 569 transitions, 7865 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:18,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:18,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:18,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:20,130 INFO L124 PetriNetUnfolderBase]: 3655/5787 cut-off events. [2024-06-21 21:09:20,131 INFO L125 PetriNetUnfolderBase]: For 992149/992152 co-relation queries the response was YES. [2024-06-21 21:09:20,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62319 conditions, 5787 events. 3655/5787 cut-off events. For 992149/992152 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34617 event pairs, 684 based on Foata normal form. 6/5789 useless extension candidates. Maximal degree in co-relation 62153. Up to 4442 conditions per place. [2024-06-21 21:09:20,216 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 409 selfloop transitions, 186 changer transitions 0/600 dead transitions. [2024-06-21 21:09:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 600 transitions, 9809 flow [2024-06-21 21:09:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:09:20,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:09:20,217 INFO L175 Difference]: Start difference. First operand has 347 places, 569 transitions, 7865 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:09:20,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 600 transitions, 9809 flow [2024-06-21 21:09:22,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 600 transitions, 9661 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:22,336 INFO L231 Difference]: Finished difference. Result has 352 places, 577 transitions, 8322 flow [2024-06-21 21:09:22,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=352, PETRI_TRANSITIONS=577} [2024-06-21 21:09:22,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 21:09:22,337 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 577 transitions, 8322 flow [2024-06-21 21:09:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:22,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:22,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:22,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:09:22,337 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:22,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1516487259, now seen corresponding path program 3 times [2024-06-21 21:09:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:22,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109724604] [2024-06-21 21:09:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109724604] [2024-06-21 21:09:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109724604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:23,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:23,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475309224] [2024-06-21 21:09:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:23,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:23,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:23,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 577 transitions, 8322 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:23,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:23,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:23,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:24,619 INFO L124 PetriNetUnfolderBase]: 3675/5805 cut-off events. [2024-06-21 21:09:24,619 INFO L125 PetriNetUnfolderBase]: For 1012007/1012010 co-relation queries the response was YES. [2024-06-21 21:09:24,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63226 conditions, 5805 events. 3675/5805 cut-off events. For 1012007/1012010 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34584 event pairs, 630 based on Foata normal form. 6/5807 useless extension candidates. Maximal degree in co-relation 63059. Up to 4458 conditions per place. [2024-06-21 21:09:24,710 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 397 selfloop transitions, 201 changer transitions 0/603 dead transitions. [2024-06-21 21:09:24,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 603 transitions, 9963 flow [2024-06-21 21:09:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:09:24,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:09:24,711 INFO L175 Difference]: Start difference. First operand has 352 places, 577 transitions, 8322 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:09:24,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 603 transitions, 9963 flow [2024-06-21 21:09:27,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 603 transitions, 9691 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:27,404 INFO L231 Difference]: Finished difference. Result has 356 places, 581 transitions, 8584 flow [2024-06-21 21:09:27,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8057, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8584, PETRI_PLACES=356, PETRI_TRANSITIONS=581} [2024-06-21 21:09:27,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-21 21:09:27,404 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 581 transitions, 8584 flow [2024-06-21 21:09:27,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:27,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:27,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:27,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:09:27,405 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:27,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:27,405 INFO L85 PathProgramCache]: Analyzing trace with hash 245049967, now seen corresponding path program 4 times [2024-06-21 21:09:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532062374] [2024-06-21 21:09:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:27,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:28,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:28,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532062374] [2024-06-21 21:09:28,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532062374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:28,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:28,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767912135] [2024-06-21 21:09:28,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:28,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:28,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:28,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:28,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 581 transitions, 8584 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:28,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:28,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:28,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:29,572 INFO L124 PetriNetUnfolderBase]: 3663/5789 cut-off events. [2024-06-21 21:09:29,572 INFO L125 PetriNetUnfolderBase]: For 1007102/1007105 co-relation queries the response was YES. [2024-06-21 21:09:29,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62955 conditions, 5789 events. 3663/5789 cut-off events. For 1007102/1007105 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34531 event pairs, 630 based on Foata normal form. 6/5791 useless extension candidates. Maximal degree in co-relation 62787. Up to 4450 conditions per place. [2024-06-21 21:09:29,662 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 401 selfloop transitions, 197 changer transitions 0/603 dead transitions. [2024-06-21 21:09:29,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 603 transitions, 10108 flow [2024-06-21 21:09:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:09:29,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:09:29,663 INFO L175 Difference]: Start difference. First operand has 356 places, 581 transitions, 8584 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:09:29,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 603 transitions, 10108 flow [2024-06-21 21:09:31,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 603 transitions, 9649 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:32,002 INFO L231 Difference]: Finished difference. Result has 359 places, 581 transitions, 8528 flow [2024-06-21 21:09:32,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8125, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8528, PETRI_PLACES=359, PETRI_TRANSITIONS=581} [2024-06-21 21:09:32,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 21:09:32,002 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 581 transitions, 8528 flow [2024-06-21 21:09:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:09:32,003 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:32,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:32,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1951205196, now seen corresponding path program 1 times [2024-06-21 21:09:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376416015] [2024-06-21 21:09:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:32,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376416015] [2024-06-21 21:09:32,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376416015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:32,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:32,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271860738] [2024-06-21 21:09:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:32,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:32,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 581 transitions, 8528 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:32,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:32,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:32,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:34,239 INFO L124 PetriNetUnfolderBase]: 3699/5827 cut-off events. [2024-06-21 21:09:34,240 INFO L125 PetriNetUnfolderBase]: For 1055085/1055092 co-relation queries the response was YES. [2024-06-21 21:09:34,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63514 conditions, 5827 events. 3699/5827 cut-off events. For 1055085/1055092 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 34562 event pairs, 614 based on Foata normal form. 16/5839 useless extension candidates. Maximal degree in co-relation 63345. Up to 5115 conditions per place. [2024-06-21 21:09:34,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 78 changer transitions 0/617 dead transitions. [2024-06-21 21:09:34,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 617 transitions, 10088 flow [2024-06-21 21:09:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:09:34,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:09:34,330 INFO L175 Difference]: Start difference. First operand has 359 places, 581 transitions, 8528 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:09:34,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 617 transitions, 10088 flow [2024-06-21 21:09:36,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 617 transitions, 9744 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:36,795 INFO L231 Difference]: Finished difference. Result has 361 places, 583 transitions, 8445 flow [2024-06-21 21:09:36,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8184, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8445, PETRI_PLACES=361, PETRI_TRANSITIONS=583} [2024-06-21 21:09:36,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 21:09:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 583 transitions, 8445 flow [2024-06-21 21:09:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:36,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:36,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:36,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:09:36,795 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:36,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1831232576, now seen corresponding path program 2 times [2024-06-21 21:09:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046582857] [2024-06-21 21:09:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:37,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:37,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046582857] [2024-06-21 21:09:37,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046582857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:37,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011184983] [2024-06-21 21:09:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:37,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:37,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 583 transitions, 8445 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:37,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:37,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:37,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:39,075 INFO L124 PetriNetUnfolderBase]: 3743/5917 cut-off events. [2024-06-21 21:09:39,075 INFO L125 PetriNetUnfolderBase]: For 1089097/1089104 co-relation queries the response was YES. [2024-06-21 21:09:39,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64194 conditions, 5917 events. 3743/5917 cut-off events. For 1089097/1089104 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35426 event pairs, 732 based on Foata normal form. 18/5931 useless extension candidates. Maximal degree in co-relation 64024. Up to 5199 conditions per place. [2024-06-21 21:09:39,161 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 108 changer transitions 0/614 dead transitions. [2024-06-21 21:09:39,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 614 transitions, 9973 flow [2024-06-21 21:09:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:09:39,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:09:39,162 INFO L175 Difference]: Start difference. First operand has 361 places, 583 transitions, 8445 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:09:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 614 transitions, 9973 flow [2024-06-21 21:09:42,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 614 transitions, 9752 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:42,331 INFO L231 Difference]: Finished difference. Result has 363 places, 585 transitions, 8554 flow [2024-06-21 21:09:42,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8554, PETRI_PLACES=363, PETRI_TRANSITIONS=585} [2024-06-21 21:09:42,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 21:09:42,331 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 585 transitions, 8554 flow [2024-06-21 21:09:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:42,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:42,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:09:42,332 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:42,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1831241876, now seen corresponding path program 3 times [2024-06-21 21:09:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048358396] [2024-06-21 21:09:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048358396] [2024-06-21 21:09:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048358396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:43,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:43,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78162644] [2024-06-21 21:09:43,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:43,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:43,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:43,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 585 transitions, 8554 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:43,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:43,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:43,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:44,730 INFO L124 PetriNetUnfolderBase]: 3787/5971 cut-off events. [2024-06-21 21:09:44,730 INFO L125 PetriNetUnfolderBase]: For 1106430/1106437 co-relation queries the response was YES. [2024-06-21 21:09:44,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65160 conditions, 5971 events. 3787/5971 cut-off events. For 1106430/1106437 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35589 event pairs, 707 based on Foata normal form. 18/5985 useless extension candidates. Maximal degree in co-relation 64989. Up to 4857 conditions per place. [2024-06-21 21:09:44,816 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 499 selfloop transitions, 116 changer transitions 0/620 dead transitions. [2024-06-21 21:09:44,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 620 transitions, 10186 flow [2024-06-21 21:09:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 21:09:44,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 21:09:44,817 INFO L175 Difference]: Start difference. First operand has 363 places, 585 transitions, 8554 flow. Second operand 9 states and 175 transitions. [2024-06-21 21:09:44,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 620 transitions, 10186 flow [2024-06-21 21:09:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 620 transitions, 9906 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:47,281 INFO L231 Difference]: Finished difference. Result has 365 places, 587 transitions, 8624 flow [2024-06-21 21:09:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8274, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8624, PETRI_PLACES=365, PETRI_TRANSITIONS=587} [2024-06-21 21:09:47,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 21:09:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 587 transitions, 8624 flow [2024-06-21 21:09:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:47,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:47,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:09:47,282 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1527342808, now seen corresponding path program 4 times [2024-06-21 21:09:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:47,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473580676] [2024-06-21 21:09:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473580676] [2024-06-21 21:09:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473580676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:48,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030104818] [2024-06-21 21:09:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:48,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:48,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 587 transitions, 8624 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:48,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:48,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:49,697 INFO L124 PetriNetUnfolderBase]: 3831/6085 cut-off events. [2024-06-21 21:09:49,698 INFO L125 PetriNetUnfolderBase]: For 1138326/1138329 co-relation queries the response was YES. [2024-06-21 21:09:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66236 conditions, 6085 events. 3831/6085 cut-off events. For 1138326/1138329 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36903 event pairs, 717 based on Foata normal form. 14/6095 useless extension candidates. Maximal degree in co-relation 66064. Up to 4888 conditions per place. [2024-06-21 21:09:49,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 172 changer transitions 0/614 dead transitions. [2024-06-21 21:09:49,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 614 transitions, 10154 flow [2024-06-21 21:09:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:09:49,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:09:49,782 INFO L175 Difference]: Start difference. First operand has 365 places, 587 transitions, 8624 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:09:49,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 614 transitions, 10154 flow [2024-06-21 21:09:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 614 transitions, 9854 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:52,377 INFO L231 Difference]: Finished difference. Result has 367 places, 589 transitions, 8790 flow [2024-06-21 21:09:52,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8324, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8790, PETRI_PLACES=367, PETRI_TRANSITIONS=589} [2024-06-21 21:09:52,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 21:09:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 589 transitions, 8790 flow [2024-06-21 21:09:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:09:52,378 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:52,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1527669238, now seen corresponding path program 5 times [2024-06-21 21:09:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522435271] [2024-06-21 21:09:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522435271] [2024-06-21 21:09:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522435271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:53,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:53,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739213485] [2024-06-21 21:09:53,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:53,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:53,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:53,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 589 transitions, 8790 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:53,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:53,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:53,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:54,772 INFO L124 PetriNetUnfolderBase]: 3947/6257 cut-off events. [2024-06-21 21:09:54,772 INFO L125 PetriNetUnfolderBase]: For 1234223/1234226 co-relation queries the response was YES. [2024-06-21 21:09:54,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69961 conditions, 6257 events. 3947/6257 cut-off events. For 1234223/1234226 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 38068 event pairs, 727 based on Foata normal form. 14/6267 useless extension candidates. Maximal degree in co-relation 69788. Up to 4846 conditions per place. [2024-06-21 21:09:54,872 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 443 selfloop transitions, 175 changer transitions 0/623 dead transitions. [2024-06-21 21:09:54,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 623 transitions, 10764 flow [2024-06-21 21:09:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:09:54,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:09:54,873 INFO L175 Difference]: Start difference. First operand has 367 places, 589 transitions, 8790 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:09:54,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 623 transitions, 10764 flow [2024-06-21 21:09:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 623 transitions, 10348 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:58,150 INFO L231 Difference]: Finished difference. Result has 369 places, 593 transitions, 8957 flow [2024-06-21 21:09:58,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8957, PETRI_PLACES=369, PETRI_TRANSITIONS=593} [2024-06-21 21:09:58,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 21:09:58,150 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 593 transitions, 8957 flow [2024-06-21 21:09:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:58,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:58,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:58,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:09:58,151 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:09:58,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash 196674620, now seen corresponding path program 6 times [2024-06-21 21:09:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311675373] [2024-06-21 21:09:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:58,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:58,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311675373] [2024-06-21 21:09:58,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311675373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:58,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:58,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:58,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286664625] [2024-06-21 21:09:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:58,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:58,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 593 transitions, 8957 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:59,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:59,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:00,542 INFO L124 PetriNetUnfolderBase]: 3919/6215 cut-off events. [2024-06-21 21:10:00,542 INFO L125 PetriNetUnfolderBase]: For 1184595/1184598 co-relation queries the response was YES. [2024-06-21 21:10:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68327 conditions, 6215 events. 3919/6215 cut-off events. For 1184595/1184598 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37817 event pairs, 717 based on Foata normal form. 14/6225 useless extension candidates. Maximal degree in co-relation 68153. Up to 5024 conditions per place. [2024-06-21 21:10:00,642 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 180 changer transitions 0/618 dead transitions. [2024-06-21 21:10:00,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 618 transitions, 10387 flow [2024-06-21 21:10:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:10:00,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:10:00,643 INFO L175 Difference]: Start difference. First operand has 369 places, 593 transitions, 8957 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:10:00,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 618 transitions, 10387 flow [2024-06-21 21:10:04,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 618 transitions, 10015 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-21 21:10:04,152 INFO L231 Difference]: Finished difference. Result has 373 places, 593 transitions, 8955 flow [2024-06-21 21:10:04,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8585, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8955, PETRI_PLACES=373, PETRI_TRANSITIONS=593} [2024-06-21 21:10:04,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 21:10:04,153 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 593 transitions, 8955 flow [2024-06-21 21:10:04,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:04,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:04,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:04,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:10:04,153 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -69358876, now seen corresponding path program 1 times [2024-06-21 21:10:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336945400] [2024-06-21 21:10:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336945400] [2024-06-21 21:10:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336945400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:04,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:04,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:04,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775833984] [2024-06-21 21:10:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:04,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:05,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:05,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 593 transitions, 8955 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:05,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:05,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:05,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:06,567 INFO L124 PetriNetUnfolderBase]: 3934/6212 cut-off events. [2024-06-21 21:10:06,568 INFO L125 PetriNetUnfolderBase]: For 1140803/1140810 co-relation queries the response was YES. [2024-06-21 21:10:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68862 conditions, 6212 events. 3934/6212 cut-off events. For 1140803/1140810 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 37501 event pairs, 795 based on Foata normal form. 9/6217 useless extension candidates. Maximal degree in co-relation 68686. Up to 5522 conditions per place. [2024-06-21 21:10:06,667 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 505 selfloop transitions, 114 changer transitions 0/624 dead transitions. [2024-06-21 21:10:06,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 624 transitions, 10513 flow [2024-06-21 21:10:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:10:06,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:10:06,668 INFO L175 Difference]: Start difference. First operand has 373 places, 593 transitions, 8955 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:10:06,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 624 transitions, 10513 flow [2024-06-21 21:10:09,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 624 transitions, 10131 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:09,534 INFO L231 Difference]: Finished difference. Result has 375 places, 597 transitions, 8998 flow [2024-06-21 21:10:09,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8998, PETRI_PLACES=375, PETRI_TRANSITIONS=597} [2024-06-21 21:10:09,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 21:10:09,534 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 597 transitions, 8998 flow [2024-06-21 21:10:09,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:09,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:09,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:10:09,534 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:09,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 234213762, now seen corresponding path program 2 times [2024-06-21 21:10:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:09,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735300735] [2024-06-21 21:10:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:09,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:10,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:10,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735300735] [2024-06-21 21:10:10,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735300735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:10,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48555650] [2024-06-21 21:10:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:10,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:10,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:10,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 597 transitions, 8998 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:10,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:10,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:10,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:11,996 INFO L124 PetriNetUnfolderBase]: 4005/6328 cut-off events. [2024-06-21 21:10:11,996 INFO L125 PetriNetUnfolderBase]: For 1217137/1217140 co-relation queries the response was YES. [2024-06-21 21:10:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71317 conditions, 6328 events. 4005/6328 cut-off events. For 1217137/1217140 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38380 event pairs, 768 based on Foata normal form. 5/6329 useless extension candidates. Maximal degree in co-relation 71140. Up to 4842 conditions per place. [2024-06-21 21:10:12,098 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 434 selfloop transitions, 195 changer transitions 0/634 dead transitions. [2024-06-21 21:10:12,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 634 transitions, 11376 flow [2024-06-21 21:10:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:10:12,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:10:12,099 INFO L175 Difference]: Start difference. First operand has 375 places, 597 transitions, 8998 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:10:12,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 634 transitions, 11376 flow [2024-06-21 21:10:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 634 transitions, 10979 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:16,027 INFO L231 Difference]: Finished difference. Result has 378 places, 609 transitions, 9662 flow [2024-06-21 21:10:16,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9662, PETRI_PLACES=378, PETRI_TRANSITIONS=609} [2024-06-21 21:10:16,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:10:16,027 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 609 transitions, 9662 flow [2024-06-21 21:10:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:16,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:16,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:10:16,028 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:16,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash 144974794, now seen corresponding path program 3 times [2024-06-21 21:10:16,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397224279] [2024-06-21 21:10:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:16,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:16,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397224279] [2024-06-21 21:10:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397224279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:16,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509137995] [2024-06-21 21:10:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:16,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:16,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:16,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:16,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 609 transitions, 9662 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:16,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:16,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:16,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:18,456 INFO L124 PetriNetUnfolderBase]: 4020/6341 cut-off events. [2024-06-21 21:10:18,456 INFO L125 PetriNetUnfolderBase]: For 1249252/1249255 co-relation queries the response was YES. [2024-06-21 21:10:18,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72968 conditions, 6341 events. 4020/6341 cut-off events. For 1249252/1249255 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38360 event pairs, 716 based on Foata normal form. 5/6342 useless extension candidates. Maximal degree in co-relation 72789. Up to 4856 conditions per place. [2024-06-21 21:10:18,560 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 428 selfloop transitions, 205 changer transitions 0/638 dead transitions. [2024-06-21 21:10:18,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 638 transitions, 11719 flow [2024-06-21 21:10:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:10:18,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:10:18,561 INFO L175 Difference]: Start difference. First operand has 378 places, 609 transitions, 9662 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:10:18,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 638 transitions, 11719 flow [2024-06-21 21:10:22,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 638 transitions, 11401 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-21 21:10:22,267 INFO L231 Difference]: Finished difference. Result has 383 places, 613 transitions, 9960 flow [2024-06-21 21:10:22,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9362, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9960, PETRI_PLACES=383, PETRI_TRANSITIONS=613} [2024-06-21 21:10:22,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 21:10:22,267 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 613 transitions, 9960 flow [2024-06-21 21:10:22,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:22,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:22,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:10:22,268 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:22,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:22,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1516217869, now seen corresponding path program 1 times [2024-06-21 21:10:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:22,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220515202] [2024-06-21 21:10:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220515202] [2024-06-21 21:10:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220515202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:23,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:10:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857015074] [2024-06-21 21:10:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:10:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:23,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:10:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:10:23,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:23,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 613 transitions, 9960 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:23,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:23,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:23,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:24,962 INFO L124 PetriNetUnfolderBase]: 4025/6314 cut-off events. [2024-06-21 21:10:24,963 INFO L125 PetriNetUnfolderBase]: For 1250430/1250434 co-relation queries the response was YES. [2024-06-21 21:10:25,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73619 conditions, 6314 events. 4025/6314 cut-off events. For 1250430/1250434 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37805 event pairs, 865 based on Foata normal form. 5/6317 useless extension candidates. Maximal degree in co-relation 73438. Up to 5922 conditions per place. [2024-06-21 21:10:25,069 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 592 selfloop transitions, 36 changer transitions 0/633 dead transitions. [2024-06-21 21:10:25,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 633 transitions, 11410 flow [2024-06-21 21:10:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:10:25,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 21:10:25,070 INFO L175 Difference]: Start difference. First operand has 383 places, 613 transitions, 9960 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:10:25,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 633 transitions, 11410 flow [2024-06-21 21:10:28,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 633 transitions, 10913 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:28,549 INFO L231 Difference]: Finished difference. Result has 386 places, 616 transitions, 9687 flow [2024-06-21 21:10:28,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9463, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9687, PETRI_PLACES=386, PETRI_TRANSITIONS=616} [2024-06-21 21:10:28,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 21:10:28,550 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 616 transitions, 9687 flow [2024-06-21 21:10:28,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:28,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:28,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:10:28,550 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:28,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:28,551 INFO L85 PathProgramCache]: Analyzing trace with hash 145362604, now seen corresponding path program 4 times [2024-06-21 21:10:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:28,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674172117] [2024-06-21 21:10:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674172117] [2024-06-21 21:10:29,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674172117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:29,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:29,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:29,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197507359] [2024-06-21 21:10:29,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:29,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:29,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:29,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 616 transitions, 9687 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:29,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:29,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:29,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:30,984 INFO L124 PetriNetUnfolderBase]: 4044/6381 cut-off events. [2024-06-21 21:10:30,984 INFO L125 PetriNetUnfolderBase]: For 1279860/1279863 co-relation queries the response was YES. [2024-06-21 21:10:31,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73471 conditions, 6381 events. 4044/6381 cut-off events. For 1279860/1279863 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38675 event pairs, 707 based on Foata normal form. 5/6382 useless extension candidates. Maximal degree in co-relation 73289. Up to 4882 conditions per place. [2024-06-21 21:10:31,092 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 423 selfloop transitions, 217 changer transitions 0/645 dead transitions. [2024-06-21 21:10:31,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 645 transitions, 11745 flow [2024-06-21 21:10:31,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:10:31,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:10:31,093 INFO L175 Difference]: Start difference. First operand has 386 places, 616 transitions, 9687 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:10:31,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 645 transitions, 11745 flow [2024-06-21 21:10:34,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 645 transitions, 11543 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:34,838 INFO L231 Difference]: Finished difference. Result has 388 places, 620 transitions, 10107 flow [2024-06-21 21:10:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9485, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10107, PETRI_PLACES=388, PETRI_TRANSITIONS=620} [2024-06-21 21:10:34,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 21:10:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 620 transitions, 10107 flow [2024-06-21 21:10:34,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:34,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:34,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:10:34,839 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:34,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1516231354, now seen corresponding path program 5 times [2024-06-21 21:10:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:34,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336120926] [2024-06-21 21:10:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:35,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336120926] [2024-06-21 21:10:35,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336120926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:35,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:35,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:35,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9688] [2024-06-21 21:10:35,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:35,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:35,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:35,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:35,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:35,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 620 transitions, 10107 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:35,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:35,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:37,297 INFO L124 PetriNetUnfolderBase]: 4039/6375 cut-off events. [2024-06-21 21:10:37,297 INFO L125 PetriNetUnfolderBase]: For 1282868/1282871 co-relation queries the response was YES. [2024-06-21 21:10:37,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74009 conditions, 6375 events. 4039/6375 cut-off events. For 1282868/1282871 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38579 event pairs, 711 based on Foata normal form. 5/6376 useless extension candidates. Maximal degree in co-relation 73826. Up to 4880 conditions per place. [2024-06-21 21:10:37,404 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 423 selfloop transitions, 216 changer transitions 0/644 dead transitions. [2024-06-21 21:10:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 644 transitions, 11753 flow [2024-06-21 21:10:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:10:37,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:10:37,405 INFO L175 Difference]: Start difference. First operand has 388 places, 620 transitions, 10107 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:10:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 644 transitions, 11753 flow [2024-06-21 21:10:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 644 transitions, 10918 flow, removed 159 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:41,526 INFO L231 Difference]: Finished difference. Result has 390 places, 620 transitions, 9711 flow [2024-06-21 21:10:41,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9272, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9711, PETRI_PLACES=390, PETRI_TRANSITIONS=620} [2024-06-21 21:10:41,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 21:10:41,527 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 620 transitions, 9711 flow [2024-06-21 21:10:41,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:41,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:41,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:41,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:10:41,527 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:41,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -667249100, now seen corresponding path program 2 times [2024-06-21 21:10:41,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:41,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438934215] [2024-06-21 21:10:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438934215] [2024-06-21 21:10:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438934215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447720499] [2024-06-21 21:10:42,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:42,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:42,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 620 transitions, 9711 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:42,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:42,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:42,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:44,319 INFO L124 PetriNetUnfolderBase]: 4044/6335 cut-off events. [2024-06-21 21:10:44,319 INFO L125 PetriNetUnfolderBase]: For 1279363/1279363 co-relation queries the response was YES. [2024-06-21 21:10:44,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73329 conditions, 6335 events. 4044/6335 cut-off events. For 1279363/1279363 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37853 event pairs, 837 based on Foata normal form. 1/6316 useless extension candidates. Maximal degree in co-relation 73146. Up to 5671 conditions per place. [2024-06-21 21:10:44,413 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 555 selfloop transitions, 84 changer transitions 0/644 dead transitions. [2024-06-21 21:10:44,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 644 transitions, 11213 flow [2024-06-21 21:10:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:10:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:10:44,414 INFO L175 Difference]: Start difference. First operand has 390 places, 620 transitions, 9711 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:10:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 644 transitions, 11213 flow [2024-06-21 21:10:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 644 transitions, 10788 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:47,791 INFO L231 Difference]: Finished difference. Result has 391 places, 623 transitions, 9606 flow [2024-06-21 21:10:47,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9606, PETRI_PLACES=391, PETRI_TRANSITIONS=623} [2024-06-21 21:10:47,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-21 21:10:47,792 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 623 transitions, 9606 flow [2024-06-21 21:10:47,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:47,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:47,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:47,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:10:47,792 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:47,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 891444759, now seen corresponding path program 5 times [2024-06-21 21:10:47,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:47,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719718713] [2024-06-21 21:10:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:47,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:48,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:48,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719718713] [2024-06-21 21:10:48,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719718713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:48,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:48,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:48,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985903960] [2024-06-21 21:10:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:48,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:48,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:48,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 623 transitions, 9606 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:48,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:48,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:48,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:50,178 INFO L124 PetriNetUnfolderBase]: 4054/6356 cut-off events. [2024-06-21 21:10:50,178 INFO L125 PetriNetUnfolderBase]: For 1308620/1308620 co-relation queries the response was YES. [2024-06-21 21:10:50,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73386 conditions, 6356 events. 4054/6356 cut-off events. For 1308620/1308620 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38066 event pairs, 818 based on Foata normal form. 2/6343 useless extension candidates. Maximal degree in co-relation 73202. Up to 5769 conditions per place. [2024-06-21 21:10:50,462 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 556 selfloop transitions, 84 changer transitions 0/645 dead transitions. [2024-06-21 21:10:50,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 645 transitions, 11085 flow [2024-06-21 21:10:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:10:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:10:50,463 INFO L175 Difference]: Start difference. First operand has 391 places, 623 transitions, 9606 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:10:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 645 transitions, 11085 flow [2024-06-21 21:10:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 645 transitions, 10783 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:54,192 INFO L231 Difference]: Finished difference. Result has 393 places, 626 transitions, 9588 flow [2024-06-21 21:10:54,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9304, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9588, PETRI_PLACES=393, PETRI_TRANSITIONS=626} [2024-06-21 21:10:54,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 21:10:54,193 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 626 transitions, 9588 flow [2024-06-21 21:10:54,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:54,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:54,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:54,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:10:54,193 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:10:54,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1543706052, now seen corresponding path program 4 times [2024-06-21 21:10:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:54,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93488605] [2024-06-21 21:10:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:54,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:55,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:55,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93488605] [2024-06-21 21:10:55,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93488605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:55,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:10:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281686162] [2024-06-21 21:10:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:10:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:10:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:10:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:10:55,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 626 transitions, 9588 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:55,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:55,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:10:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:56,839 INFO L124 PetriNetUnfolderBase]: 3862/6200 cut-off events. [2024-06-21 21:10:56,839 INFO L125 PetriNetUnfolderBase]: For 1328590/1328602 co-relation queries the response was YES. [2024-06-21 21:10:56,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71994 conditions, 6200 events. 3862/6200 cut-off events. For 1328590/1328602 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38540 event pairs, 763 based on Foata normal form. 7/6177 useless extension candidates. Maximal degree in co-relation 71809. Up to 5082 conditions per place. [2024-06-21 21:10:56,941 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 110 changer transitions 0/650 dead transitions. [2024-06-21 21:10:56,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 650 transitions, 11014 flow [2024-06-21 21:10:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:10:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:10:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 21:10:56,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-21 21:10:56,942 INFO L175 Difference]: Start difference. First operand has 393 places, 626 transitions, 9588 flow. Second operand 7 states and 146 transitions. [2024-06-21 21:10:56,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 650 transitions, 11014 flow [2024-06-21 21:11:01,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 650 transitions, 10803 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:01,189 INFO L231 Difference]: Finished difference. Result has 394 places, 629 transitions, 9792 flow [2024-06-21 21:11:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9377, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9792, PETRI_PLACES=394, PETRI_TRANSITIONS=629} [2024-06-21 21:11:01,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:11:01,189 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 629 transitions, 9792 flow [2024-06-21 21:11:01,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:01,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:01,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:11:01,190 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:01,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1746925248, now seen corresponding path program 3 times [2024-06-21 21:11:01,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:01,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409202143] [2024-06-21 21:11:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:01,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409202143] [2024-06-21 21:11:02,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409202143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:02,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:02,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443155647] [2024-06-21 21:11:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:02,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:02,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:02,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 629 transitions, 9792 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:02,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:02,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:02,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:03,984 INFO L124 PetriNetUnfolderBase]: 4064/6365 cut-off events. [2024-06-21 21:11:03,984 INFO L125 PetriNetUnfolderBase]: For 1347606/1347606 co-relation queries the response was YES. [2024-06-21 21:11:04,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74459 conditions, 6365 events. 4064/6365 cut-off events. For 1347606/1347606 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38012 event pairs, 838 based on Foata normal form. 1/6346 useless extension candidates. Maximal degree in co-relation 74273. Up to 5699 conditions per place. [2024-06-21 21:11:04,085 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 554 selfloop transitions, 92 changer transitions 0/651 dead transitions. [2024-06-21 21:11:04,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 651 transitions, 11298 flow [2024-06-21 21:11:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:11:04,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:11:04,086 INFO L175 Difference]: Start difference. First operand has 394 places, 629 transitions, 9792 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:11:04,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 651 transitions, 11298 flow [2024-06-21 21:11:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 651 transitions, 11023 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:07,884 INFO L231 Difference]: Finished difference. Result has 399 places, 632 transitions, 9861 flow [2024-06-21 21:11:07,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9517, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9861, PETRI_PLACES=399, PETRI_TRANSITIONS=632} [2024-06-21 21:11:07,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 21:11:07,884 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 632 transitions, 9861 flow [2024-06-21 21:11:07,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:07,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:07,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:07,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:11:07,885 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:07,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1727211842, now seen corresponding path program 5 times [2024-06-21 21:11:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558644974] [2024-06-21 21:11:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:08,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558644974] [2024-06-21 21:11:08,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558644974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:08,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:08,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:08,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512611698] [2024-06-21 21:11:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:08,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:08,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:08,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:11:08,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 632 transitions, 9861 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:08,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:08,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:11:08,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:10,442 INFO L124 PetriNetUnfolderBase]: 3856/6224 cut-off events. [2024-06-21 21:11:10,442 INFO L125 PetriNetUnfolderBase]: For 1385566/1385596 co-relation queries the response was YES. [2024-06-21 21:11:10,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73045 conditions, 6224 events. 3856/6224 cut-off events. For 1385566/1385596 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 39124 event pairs, 708 based on Foata normal form. 9/6169 useless extension candidates. Maximal degree in co-relation 72858. Up to 4898 conditions per place. [2024-06-21 21:11:10,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 142 changer transitions 0/652 dead transitions. [2024-06-21 21:11:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 652 transitions, 11291 flow [2024-06-21 21:11:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 21:11:10,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 21:11:10,550 INFO L175 Difference]: Start difference. First operand has 399 places, 632 transitions, 9861 flow. Second operand 7 states and 141 transitions. [2024-06-21 21:11:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 652 transitions, 11291 flow [2024-06-21 21:11:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 652 transitions, 11017 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:14,875 INFO L231 Difference]: Finished difference. Result has 399 places, 635 transitions, 10058 flow [2024-06-21 21:11:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9587, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10058, PETRI_PLACES=399, PETRI_TRANSITIONS=635} [2024-06-21 21:11:14,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 21:11:14,875 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 635 transitions, 10058 flow [2024-06-21 21:11:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:14,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:14,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:14,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:11:14,876 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:14,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2097025766, now seen corresponding path program 4 times [2024-06-21 21:11:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:14,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282818866] [2024-06-21 21:11:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282818866] [2024-06-21 21:11:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282818866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:15,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:15,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511148218] [2024-06-21 21:11:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:15,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:15,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 635 transitions, 10058 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:15,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:15,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:17,716 INFO L124 PetriNetUnfolderBase]: 4074/6380 cut-off events. [2024-06-21 21:11:17,717 INFO L125 PetriNetUnfolderBase]: For 1401029/1401029 co-relation queries the response was YES. [2024-06-21 21:11:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75927 conditions, 6380 events. 4074/6380 cut-off events. For 1401029/1401029 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38167 event pairs, 838 based on Foata normal form. 1/6361 useless extension candidates. Maximal degree in co-relation 75739. Up to 5679 conditions per place. [2024-06-21 21:11:17,827 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 537 selfloop transitions, 116 changer transitions 0/658 dead transitions. [2024-06-21 21:11:17,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 658 transitions, 11976 flow [2024-06-21 21:11:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 21:11:17,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 21:11:17,829 INFO L175 Difference]: Start difference. First operand has 399 places, 635 transitions, 10058 flow. Second operand 10 states and 179 transitions. [2024-06-21 21:11:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 658 transitions, 11976 flow [2024-06-21 21:11:22,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 658 transitions, 11601 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:22,833 INFO L231 Difference]: Finished difference. Result has 404 places, 641 transitions, 10239 flow [2024-06-21 21:11:22,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10239, PETRI_PLACES=404, PETRI_TRANSITIONS=641} [2024-06-21 21:11:22,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 21:11:22,833 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 641 transitions, 10239 flow [2024-06-21 21:11:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:22,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:22,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:11:22,834 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:22,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:22,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1189144482, now seen corresponding path program 6 times [2024-06-21 21:11:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662930489] [2024-06-21 21:11:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:23,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662930489] [2024-06-21 21:11:23,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662930489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:23,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:23,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:23,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644145642] [2024-06-21 21:11:23,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:23,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:11:23,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 641 transitions, 10239 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:23,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:23,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:11:23,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:25,387 INFO L124 PetriNetUnfolderBase]: 3854/6225 cut-off events. [2024-06-21 21:11:25,387 INFO L125 PetriNetUnfolderBase]: For 1432349/1432379 co-relation queries the response was YES. [2024-06-21 21:11:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73979 conditions, 6225 events. 3854/6225 cut-off events. For 1432349/1432379 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 39267 event pairs, 752 based on Foata normal form. 9/6130 useless extension candidates. Maximal degree in co-relation 73790. Up to 4823 conditions per place. [2024-06-21 21:11:25,498 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 164 changer transitions 0/656 dead transitions. [2024-06-21 21:11:25,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 656 transitions, 11667 flow [2024-06-21 21:11:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 21:11:25,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-21 21:11:25,500 INFO L175 Difference]: Start difference. First operand has 404 places, 641 transitions, 10239 flow. Second operand 7 states and 138 transitions. [2024-06-21 21:11:25,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 656 transitions, 11667 flow [2024-06-21 21:11:29,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 656 transitions, 11277 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:29,905 INFO L231 Difference]: Finished difference. Result has 404 places, 644 transitions, 10359 flow [2024-06-21 21:11:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9849, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10359, PETRI_PLACES=404, PETRI_TRANSITIONS=644} [2024-06-21 21:11:29,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 21:11:29,905 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 644 transitions, 10359 flow [2024-06-21 21:11:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:11:29,906 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:29,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2101603998, now seen corresponding path program 5 times [2024-06-21 21:11:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:29,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082368452] [2024-06-21 21:11:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:29,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082368452] [2024-06-21 21:11:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082368452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:30,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:30,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237223363] [2024-06-21 21:11:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:30,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:30,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 644 transitions, 10359 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:30,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:30,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:30,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:32,629 INFO L124 PetriNetUnfolderBase]: 4068/6374 cut-off events. [2024-06-21 21:11:32,629 INFO L125 PetriNetUnfolderBase]: For 1432562/1432562 co-relation queries the response was YES. [2024-06-21 21:11:32,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76406 conditions, 6374 events. 4068/6374 cut-off events. For 1432562/1432562 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38170 event pairs, 836 based on Foata normal form. 1/6355 useless extension candidates. Maximal degree in co-relation 76216. Up to 5672 conditions per place. [2024-06-21 21:11:32,743 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 536 selfloop transitions, 119 changer transitions 0/660 dead transitions. [2024-06-21 21:11:32,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 660 transitions, 11721 flow [2024-06-21 21:11:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 21:11:32,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 21:11:32,744 INFO L175 Difference]: Start difference. First operand has 404 places, 644 transitions, 10359 flow. Second operand 10 states and 178 transitions. [2024-06-21 21:11:32,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 660 transitions, 11721 flow [2024-06-21 21:11:37,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 660 transitions, 11161 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:37,049 INFO L231 Difference]: Finished difference. Result has 409 places, 644 transitions, 10043 flow [2024-06-21 21:11:37,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9799, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10043, PETRI_PLACES=409, PETRI_TRANSITIONS=644} [2024-06-21 21:11:37,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 21:11:37,050 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 644 transitions, 10043 flow [2024-06-21 21:11:37,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:37,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:37,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:37,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:11:37,051 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:37,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1011302889, now seen corresponding path program 6 times [2024-06-21 21:11:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651510537] [2024-06-21 21:11:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651510537] [2024-06-21 21:11:37,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651510537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455615747] [2024-06-21 21:11:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:37,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:37,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 644 transitions, 10043 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:37,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:37,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:37,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:39,593 INFO L124 PetriNetUnfolderBase]: 4110/6454 cut-off events. [2024-06-21 21:11:39,593 INFO L125 PetriNetUnfolderBase]: For 1492252/1492252 co-relation queries the response was YES. [2024-06-21 21:11:39,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77390 conditions, 6454 events. 4110/6454 cut-off events. For 1492252/1492252 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38893 event pairs, 782 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 77199. Up to 5631 conditions per place. [2024-06-21 21:11:39,710 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 542 selfloop transitions, 126 changer transitions 0/673 dead transitions. [2024-06-21 21:11:39,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 673 transitions, 12268 flow [2024-06-21 21:11:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:11:39,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:11:39,711 INFO L175 Difference]: Start difference. First operand has 409 places, 644 transitions, 10043 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:11:39,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 673 transitions, 12268 flow [2024-06-21 21:11:44,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 673 transitions, 12022 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:44,360 INFO L231 Difference]: Finished difference. Result has 411 places, 654 transitions, 10430 flow [2024-06-21 21:11:44,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9797, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10430, PETRI_PLACES=411, PETRI_TRANSITIONS=654} [2024-06-21 21:11:44,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-21 21:11:44,361 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 654 transitions, 10430 flow [2024-06-21 21:11:44,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:44,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:44,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:11:44,361 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2088348299, now seen corresponding path program 7 times [2024-06-21 21:11:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:44,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546261112] [2024-06-21 21:11:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546261112] [2024-06-21 21:11:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546261112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675699299] [2024-06-21 21:11:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:45,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:45,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 654 transitions, 10430 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:45,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:45,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:45,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:46,814 INFO L124 PetriNetUnfolderBase]: 4104/6462 cut-off events. [2024-06-21 21:11:46,814 INFO L125 PetriNetUnfolderBase]: For 1500826/1500826 co-relation queries the response was YES. [2024-06-21 21:11:46,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77640 conditions, 6462 events. 4104/6462 cut-off events. For 1500826/1500826 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39193 event pairs, 767 based on Foata normal form. 2/6450 useless extension candidates. Maximal degree in co-relation 77446. Up to 5626 conditions per place. [2024-06-21 21:11:46,932 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 536 selfloop transitions, 132 changer transitions 0/673 dead transitions. [2024-06-21 21:11:46,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 673 transitions, 12372 flow [2024-06-21 21:11:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:11:46,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:11:46,933 INFO L175 Difference]: Start difference. First operand has 411 places, 654 transitions, 10430 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:11:46,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 673 transitions, 12372 flow [2024-06-21 21:11:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 673 transitions, 12112 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:51,706 INFO L231 Difference]: Finished difference. Result has 415 places, 654 transitions, 10440 flow [2024-06-21 21:11:51,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10170, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10440, PETRI_PLACES=415, PETRI_TRANSITIONS=654} [2024-06-21 21:11:51,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 21:11:51,707 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 654 transitions, 10440 flow [2024-06-21 21:11:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:51,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:51,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:11:51,707 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1904530959, now seen corresponding path program 8 times [2024-06-21 21:11:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:51,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101767655] [2024-06-21 21:11:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101767655] [2024-06-21 21:11:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101767655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608537800] [2024-06-21 21:11:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:52,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 654 transitions, 10440 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:52,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:52,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:52,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:54,275 INFO L124 PetriNetUnfolderBase]: 4098/6454 cut-off events. [2024-06-21 21:11:54,276 INFO L125 PetriNetUnfolderBase]: For 1504774/1504774 co-relation queries the response was YES. [2024-06-21 21:11:54,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77399 conditions, 6454 events. 4098/6454 cut-off events. For 1504774/1504774 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39117 event pairs, 756 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 77204. Up to 5621 conditions per place. [2024-06-21 21:11:54,391 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 529 selfloop transitions, 138 changer transitions 0/672 dead transitions. [2024-06-21 21:11:54,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 672 transitions, 12126 flow [2024-06-21 21:11:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:11:54,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:11:54,392 INFO L175 Difference]: Start difference. First operand has 415 places, 654 transitions, 10440 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:11:54,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 672 transitions, 12126 flow [2024-06-21 21:11:59,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 672 transitions, 11784 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:59,732 INFO L231 Difference]: Finished difference. Result has 418 places, 654 transitions, 10380 flow [2024-06-21 21:11:59,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10098, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10380, PETRI_PLACES=418, PETRI_TRANSITIONS=654} [2024-06-21 21:11:59,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 21:11:59,733 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 654 transitions, 10380 flow [2024-06-21 21:11:59,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:59,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:59,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:59,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:11:59,734 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:11:59,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 801174323, now seen corresponding path program 9 times [2024-06-21 21:11:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898299228] [2024-06-21 21:11:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898299228] [2024-06-21 21:12:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898299228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:00,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505895157] [2024-06-21 21:12:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:00,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:00,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:00,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 654 transitions, 10380 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:00,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:00,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:00,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:02,253 INFO L124 PetriNetUnfolderBase]: 4156/6594 cut-off events. [2024-06-21 21:12:02,253 INFO L125 PetriNetUnfolderBase]: For 1579196/1579199 co-relation queries the response was YES. [2024-06-21 21:12:02,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79241 conditions, 6594 events. 4156/6594 cut-off events. For 1579196/1579199 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40550 event pairs, 752 based on Foata normal form. 4/6578 useless extension candidates. Maximal degree in co-relation 79045. Up to 4630 conditions per place. [2024-06-21 21:12:02,370 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 370 selfloop transitions, 309 changer transitions 0/684 dead transitions. [2024-06-21 21:12:02,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 684 transitions, 12946 flow [2024-06-21 21:12:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:12:02,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:12:02,371 INFO L175 Difference]: Start difference. First operand has 418 places, 654 transitions, 10380 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:12:02,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 684 transitions, 12946 flow [2024-06-21 21:12:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 684 transitions, 12694 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:12:07,803 INFO L231 Difference]: Finished difference. Result has 420 places, 665 transitions, 11078 flow [2024-06-21 21:12:07,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10128, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11078, PETRI_PLACES=420, PETRI_TRANSITIONS=665} [2024-06-21 21:12:07,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 21:12:07,803 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 665 transitions, 11078 flow [2024-06-21 21:12:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:07,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:07,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:07,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:12:07,804 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:07,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:07,804 INFO L85 PathProgramCache]: Analyzing trace with hash 800728853, now seen corresponding path program 10 times [2024-06-21 21:12:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891864887] [2024-06-21 21:12:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:08,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:08,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891864887] [2024-06-21 21:12:08,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891864887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:08,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:08,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249027380] [2024-06-21 21:12:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:08,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:08,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:08,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:08,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 665 transitions, 11078 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:08,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:08,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:08,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:10,307 INFO L124 PetriNetUnfolderBase]: 4150/6580 cut-off events. [2024-06-21 21:12:10,308 INFO L125 PetriNetUnfolderBase]: For 1589769/1589772 co-relation queries the response was YES. [2024-06-21 21:12:10,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79783 conditions, 6580 events. 4150/6580 cut-off events. For 1589769/1589772 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40419 event pairs, 758 based on Foata normal form. 4/6564 useless extension candidates. Maximal degree in co-relation 79586. Up to 4627 conditions per place. [2024-06-21 21:12:10,425 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 375 selfloop transitions, 304 changer transitions 0/684 dead transitions. [2024-06-21 21:12:10,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 684 transitions, 13324 flow [2024-06-21 21:12:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:12:10,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:12:10,426 INFO L175 Difference]: Start difference. First operand has 420 places, 665 transitions, 11078 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:12:10,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 684 transitions, 13324 flow [2024-06-21 21:12:15,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 684 transitions, 12646 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 21:12:15,294 INFO L231 Difference]: Finished difference. Result has 422 places, 665 transitions, 11014 flow [2024-06-21 21:12:15,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10400, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11014, PETRI_PLACES=422, PETRI_TRANSITIONS=665} [2024-06-21 21:12:15,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 21:12:15,295 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 665 transitions, 11014 flow [2024-06-21 21:12:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:15,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:15,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:15,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:12:15,295 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:15,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash 787841843, now seen corresponding path program 11 times [2024-06-21 21:12:15,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235202769] [2024-06-21 21:12:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:16,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235202769] [2024-06-21 21:12:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235202769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:16,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:16,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582775989] [2024-06-21 21:12:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:16,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:16,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 665 transitions, 11014 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:16,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:16,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:16,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:17,806 INFO L124 PetriNetUnfolderBase]: 4192/6626 cut-off events. [2024-06-21 21:12:17,806 INFO L125 PetriNetUnfolderBase]: For 1646719/1646722 co-relation queries the response was YES. [2024-06-21 21:12:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80754 conditions, 6626 events. 4192/6626 cut-off events. For 1646719/1646722 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40506 event pairs, 789 based on Foata normal form. 4/6610 useless extension candidates. Maximal degree in co-relation 80558. Up to 4651 conditions per place. [2024-06-21 21:12:17,927 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 376 selfloop transitions, 312 changer transitions 0/693 dead transitions. [2024-06-21 21:12:17,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 693 transitions, 13572 flow [2024-06-21 21:12:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:12:17,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:12:17,929 INFO L175 Difference]: Start difference. First operand has 422 places, 665 transitions, 11014 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:12:17,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 693 transitions, 13572 flow [2024-06-21 21:12:22,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 693 transitions, 12927 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:22,924 INFO L231 Difference]: Finished difference. Result has 425 places, 674 transitions, 11287 flow [2024-06-21 21:12:22,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10384, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11287, PETRI_PLACES=425, PETRI_TRANSITIONS=674} [2024-06-21 21:12:22,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-21 21:12:22,925 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 674 transitions, 11287 flow [2024-06-21 21:12:22,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:22,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:22,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:22,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:12:22,925 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash -723824619, now seen corresponding path program 12 times [2024-06-21 21:12:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:22,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799600255] [2024-06-21 21:12:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:22,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799600255] [2024-06-21 21:12:23,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799600255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:23,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:23,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:23,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560076412] [2024-06-21 21:12:23,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:23,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:23,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:23,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 674 transitions, 11287 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:23,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:23,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:23,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:25,436 INFO L124 PetriNetUnfolderBase]: 4266/6776 cut-off events. [2024-06-21 21:12:25,436 INFO L125 PetriNetUnfolderBase]: For 1747685/1747688 co-relation queries the response was YES. [2024-06-21 21:12:25,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83087 conditions, 6776 events. 4266/6776 cut-off events. For 1747685/1747688 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42067 event pairs, 747 based on Foata normal form. 4/6760 useless extension candidates. Maximal degree in co-relation 82890. Up to 4705 conditions per place. [2024-06-21 21:12:25,557 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 369 selfloop transitions, 331 changer transitions 0/705 dead transitions. [2024-06-21 21:12:25,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 705 transitions, 13934 flow [2024-06-21 21:12:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:12:25,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:12:25,558 INFO L175 Difference]: Start difference. First operand has 425 places, 674 transitions, 11287 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:12:25,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 705 transitions, 13934 flow [2024-06-21 21:12:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 705 transitions, 13386 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 21:12:30,645 INFO L231 Difference]: Finished difference. Result has 429 places, 686 transitions, 11754 flow [2024-06-21 21:12:30,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11754, PETRI_PLACES=429, PETRI_TRANSITIONS=686} [2024-06-21 21:12:30,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 21:12:30,645 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 686 transitions, 11754 flow [2024-06-21 21:12:30,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:30,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:30,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:12:30,646 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:30,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash -724270089, now seen corresponding path program 13 times [2024-06-21 21:12:30,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:30,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525768444] [2024-06-21 21:12:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:30,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525768444] [2024-06-21 21:12:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525768444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:31,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:31,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066711947] [2024-06-21 21:12:31,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:31,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:31,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:31,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 686 transitions, 11754 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:31,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:31,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:31,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:33,224 INFO L124 PetriNetUnfolderBase]: 4260/6768 cut-off events. [2024-06-21 21:12:33,224 INFO L125 PetriNetUnfolderBase]: For 1754880/1754883 co-relation queries the response was YES. [2024-06-21 21:12:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83021 conditions, 6768 events. 4260/6768 cut-off events. For 1754880/1754883 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42041 event pairs, 759 based on Foata normal form. 4/6752 useless extension candidates. Maximal degree in co-relation 82823. Up to 4702 conditions per place. [2024-06-21 21:12:33,350 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 373 selfloop transitions, 327 changer transitions 0/705 dead transitions. [2024-06-21 21:12:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 705 transitions, 14060 flow [2024-06-21 21:12:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:12:33,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:12:33,351 INFO L175 Difference]: Start difference. First operand has 429 places, 686 transitions, 11754 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:12:33,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 705 transitions, 14060 flow [2024-06-21 21:12:39,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 705 transitions, 13325 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:39,210 INFO L231 Difference]: Finished difference. Result has 432 places, 686 transitions, 11679 flow [2024-06-21 21:12:39,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11019, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11679, PETRI_PLACES=432, PETRI_TRANSITIONS=686} [2024-06-21 21:12:39,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 21:12:39,211 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 686 transitions, 11679 flow [2024-06-21 21:12:39,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:39,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:39,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:39,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:12:39,211 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:39,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -901134699, now seen corresponding path program 14 times [2024-06-21 21:12:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:39,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17328416] [2024-06-21 21:12:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17328416] [2024-06-21 21:12:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17328416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:39,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:39,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613960971] [2024-06-21 21:12:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:39,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:39,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:39,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:40,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:40,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 686 transitions, 11679 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:40,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:40,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:40,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:41,859 INFO L124 PetriNetUnfolderBase]: 4248/6750 cut-off events. [2024-06-21 21:12:41,859 INFO L125 PetriNetUnfolderBase]: For 1758196/1758199 co-relation queries the response was YES. [2024-06-21 21:12:41,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82412 conditions, 6750 events. 4248/6750 cut-off events. For 1758196/1758199 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41922 event pairs, 746 based on Foata normal form. 6/6736 useless extension candidates. Maximal degree in co-relation 82213. Up to 4694 conditions per place. [2024-06-21 21:12:41,983 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 407 selfloop transitions, 293 changer transitions 0/705 dead transitions. [2024-06-21 21:12:41,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 705 transitions, 13991 flow [2024-06-21 21:12:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:12:41,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:12:41,984 INFO L175 Difference]: Start difference. First operand has 432 places, 686 transitions, 11679 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:12:41,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 705 transitions, 13991 flow [2024-06-21 21:12:47,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 705 transitions, 13350 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:47,401 INFO L231 Difference]: Finished difference. Result has 435 places, 686 transitions, 11633 flow [2024-06-21 21:12:47,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11038, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11633, PETRI_PLACES=435, PETRI_TRANSITIONS=686} [2024-06-21 21:12:47,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 21:12:47,402 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 686 transitions, 11633 flow [2024-06-21 21:12:47,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:47,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:47,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:12:47,402 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:47,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash -901401609, now seen corresponding path program 15 times [2024-06-21 21:12:47,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:47,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438464263] [2024-06-21 21:12:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:47,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:48,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438464263] [2024-06-21 21:12:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438464263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:48,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:48,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:48,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624801482] [2024-06-21 21:12:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:48,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:48,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:48,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 686 transitions, 11633 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:48,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:48,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:48,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:50,115 INFO L124 PetriNetUnfolderBase]: 4232/6726 cut-off events. [2024-06-21 21:12:50,115 INFO L125 PetriNetUnfolderBase]: For 1744776/1744779 co-relation queries the response was YES. [2024-06-21 21:12:50,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81755 conditions, 6726 events. 4232/6726 cut-off events. For 1744776/1744779 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41767 event pairs, 746 based on Foata normal form. 6/6712 useless extension candidates. Maximal degree in co-relation 81555. Up to 4681 conditions per place. [2024-06-21 21:12:50,243 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 405 selfloop transitions, 295 changer transitions 0/705 dead transitions. [2024-06-21 21:12:50,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 705 transitions, 13951 flow [2024-06-21 21:12:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:12:50,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:12:50,244 INFO L175 Difference]: Start difference. First operand has 435 places, 686 transitions, 11633 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:12:50,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 705 transitions, 13951 flow [2024-06-21 21:12:55,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 705 transitions, 13266 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:55,564 INFO L231 Difference]: Finished difference. Result has 438 places, 686 transitions, 11545 flow [2024-06-21 21:12:55,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10948, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11545, PETRI_PLACES=438, PETRI_TRANSITIONS=686} [2024-06-21 21:12:55,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 21:12:55,564 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 686 transitions, 11545 flow [2024-06-21 21:12:55,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:55,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:55,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:12:55,565 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:12:55,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash -473038029, now seen corresponding path program 16 times [2024-06-21 21:12:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:55,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865858670] [2024-06-21 21:12:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865858670] [2024-06-21 21:12:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865858670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:56,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:56,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:12:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003823417] [2024-06-21 21:12:56,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:56,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:12:56,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:12:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:12:56,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:56,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 686 transitions, 11545 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:56,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:56,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:56,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:58,359 INFO L124 PetriNetUnfolderBase]: 4220/6710 cut-off events. [2024-06-21 21:12:58,360 INFO L125 PetriNetUnfolderBase]: For 1727193/1727196 co-relation queries the response was YES. [2024-06-21 21:12:58,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81006 conditions, 6710 events. 4220/6710 cut-off events. For 1727193/1727196 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41625 event pairs, 693 based on Foata normal form. 6/6696 useless extension candidates. Maximal degree in co-relation 80805. Up to 4673 conditions per place. [2024-06-21 21:12:58,477 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 377 selfloop transitions, 322 changer transitions 0/704 dead transitions. [2024-06-21 21:12:58,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 704 transitions, 13593 flow [2024-06-21 21:12:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:12:58,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:12:58,478 INFO L175 Difference]: Start difference. First operand has 438 places, 686 transitions, 11545 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:12:58,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 704 transitions, 13593 flow [2024-06-21 21:13:04,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 704 transitions, 12846 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 21:13:04,182 INFO L231 Difference]: Finished difference. Result has 438 places, 686 transitions, 11450 flow [2024-06-21 21:13:04,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10798, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11450, PETRI_PLACES=438, PETRI_TRANSITIONS=686} [2024-06-21 21:13:04,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 21:13:04,183 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 686 transitions, 11450 flow [2024-06-21 21:13:04,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:04,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:04,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:04,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:13:04,184 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:04,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash -467324109, now seen corresponding path program 17 times [2024-06-21 21:13:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:04,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611568733] [2024-06-21 21:13:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:04,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:04,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611568733] [2024-06-21 21:13:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611568733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:13:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202172046] [2024-06-21 21:13:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:13:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:13:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:13:05,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:05,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 686 transitions, 11450 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:05,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:05,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:05,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:06,818 INFO L124 PetriNetUnfolderBase]: 4210/6696 cut-off events. [2024-06-21 21:13:06,818 INFO L125 PetriNetUnfolderBase]: For 1708260/1708263 co-relation queries the response was YES. [2024-06-21 21:13:06,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80750 conditions, 6696 events. 4210/6696 cut-off events. For 1708260/1708263 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41619 event pairs, 692 based on Foata normal form. 4/6680 useless extension candidates. Maximal degree in co-relation 80548. Up to 4665 conditions per place. [2024-06-21 21:13:06,947 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 364 selfloop transitions, 335 changer transitions 0/704 dead transitions. [2024-06-21 21:13:06,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 704 transitions, 13502 flow [2024-06-21 21:13:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:13:06,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:13:06,948 INFO L175 Difference]: Start difference. First operand has 438 places, 686 transitions, 11450 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:13:06,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 704 transitions, 13502 flow [2024-06-21 21:13:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 704 transitions, 12807 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:12,840 INFO L231 Difference]: Finished difference. Result has 440 places, 686 transitions, 11431 flow [2024-06-21 21:13:12,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10755, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11431, PETRI_PLACES=440, PETRI_TRANSITIONS=686} [2024-06-21 21:13:12,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-21 21:13:12,841 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 686 transitions, 11431 flow [2024-06-21 21:13:12,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:12,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:12,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:13:12,841 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:12,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -400649421, now seen corresponding path program 18 times [2024-06-21 21:13:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:12,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078170992] [2024-06-21 21:13:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078170992] [2024-06-21 21:13:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078170992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239819666] [2024-06-21 21:13:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:13,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:13,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 686 transitions, 11431 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:13,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:13,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:13,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:15,475 INFO L124 PetriNetUnfolderBase]: 4198/6634 cut-off events. [2024-06-21 21:13:15,475 INFO L125 PetriNetUnfolderBase]: For 1704099/1704102 co-relation queries the response was YES. [2024-06-21 21:13:15,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80105 conditions, 6634 events. 4198/6634 cut-off events. For 1704099/1704102 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 40610 event pairs, 761 based on Foata normal form. 6/6620 useless extension candidates. Maximal degree in co-relation 79902. Up to 4657 conditions per place. [2024-06-21 21:13:15,593 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 425 selfloop transitions, 274 changer transitions 0/704 dead transitions. [2024-06-21 21:13:15,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 704 transitions, 13487 flow [2024-06-21 21:13:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:13:15,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:13:15,594 INFO L175 Difference]: Start difference. First operand has 440 places, 686 transitions, 11431 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:13:15,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 704 transitions, 13487 flow [2024-06-21 21:13:21,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 704 transitions, 12644 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 21:13:21,341 INFO L231 Difference]: Finished difference. Result has 439 places, 686 transitions, 11146 flow [2024-06-21 21:13:21,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10588, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11146, PETRI_PLACES=439, PETRI_TRANSITIONS=686} [2024-06-21 21:13:21,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 21:13:21,341 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 686 transitions, 11146 flow [2024-06-21 21:13:21,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:21,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:21,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:21,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:13:21,342 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:21,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:21,342 INFO L85 PathProgramCache]: Analyzing trace with hash 588540053, now seen corresponding path program 19 times [2024-06-21 21:13:21,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:21,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616617055] [2024-06-21 21:13:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:21,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:22,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616617055] [2024-06-21 21:13:22,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616617055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:22,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:22,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:13:22,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943816458] [2024-06-21 21:13:22,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:22,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:13:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:13:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:13:22,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:22,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 686 transitions, 11146 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:22,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:22,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:22,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:23,942 INFO L124 PetriNetUnfolderBase]: 4186/6616 cut-off events. [2024-06-21 21:13:23,942 INFO L125 PetriNetUnfolderBase]: For 1684782/1684785 co-relation queries the response was YES. [2024-06-21 21:13:24,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78998 conditions, 6616 events. 4186/6616 cut-off events. For 1684782/1684785 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 40506 event pairs, 765 based on Foata normal form. 6/6602 useless extension candidates. Maximal degree in co-relation 78794. Up to 4649 conditions per place. [2024-06-21 21:13:24,064 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 414 selfloop transitions, 285 changer transitions 0/704 dead transitions. [2024-06-21 21:13:24,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 704 transitions, 13206 flow [2024-06-21 21:13:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:13:24,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:13:24,065 INFO L175 Difference]: Start difference. First operand has 439 places, 686 transitions, 11146 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:13:24,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 704 transitions, 13206 flow [2024-06-21 21:13:29,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 704 transitions, 12622 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 21:13:29,388 INFO L231 Difference]: Finished difference. Result has 442 places, 686 transitions, 11139 flow [2024-06-21 21:13:29,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10562, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11139, PETRI_PLACES=442, PETRI_TRANSITIONS=686} [2024-06-21 21:13:29,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 21:13:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 686 transitions, 11139 flow [2024-06-21 21:13:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:13:29,389 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -370557011, now seen corresponding path program 20 times [2024-06-21 21:13:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078387159] [2024-06-21 21:13:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078387159] [2024-06-21 21:13:30,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078387159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:30,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:30,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:13:30,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178936075] [2024-06-21 21:13:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:30,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:13:30,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:13:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:13:30,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:30,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 686 transitions, 11139 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:30,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:30,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:30,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:32,038 INFO L124 PetriNetUnfolderBase]: 4170/6594 cut-off events. [2024-06-21 21:13:32,038 INFO L125 PetriNetUnfolderBase]: For 1665346/1665349 co-relation queries the response was YES. [2024-06-21 21:13:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78305 conditions, 6594 events. 4170/6594 cut-off events. For 1665346/1665349 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 40370 event pairs, 759 based on Foata normal form. 6/6580 useless extension candidates. Maximal degree in co-relation 78100. Up to 4636 conditions per place. [2024-06-21 21:13:32,164 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 425 selfloop transitions, 273 changer transitions 0/703 dead transitions. [2024-06-21 21:13:32,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 703 transitions, 12919 flow [2024-06-21 21:13:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:13:32,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:13:32,165 INFO L175 Difference]: Start difference. First operand has 442 places, 686 transitions, 11139 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:13:32,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 703 transitions, 12919 flow [2024-06-21 21:13:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 703 transitions, 12214 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:38,660 INFO L231 Difference]: Finished difference. Result has 444 places, 686 transitions, 10987 flow [2024-06-21 21:13:38,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10434, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10987, PETRI_PLACES=444, PETRI_TRANSITIONS=686} [2024-06-21 21:13:38,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 21:13:38,660 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 686 transitions, 10987 flow [2024-06-21 21:13:38,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:38,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:38,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:13:38,661 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:38,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash -401039680, now seen corresponding path program 7 times [2024-06-21 21:13:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107039291] [2024-06-21 21:13:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:39,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107039291] [2024-06-21 21:13:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107039291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:39,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:39,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:13:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249889083] [2024-06-21 21:13:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:39,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:13:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:13:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:13:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:39,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 686 transitions, 10987 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:39,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:39,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:41,478 INFO L124 PetriNetUnfolderBase]: 4214/6701 cut-off events. [2024-06-21 21:13:41,479 INFO L125 PetriNetUnfolderBase]: For 1774534/1774537 co-relation queries the response was YES. [2024-06-21 21:13:41,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79277 conditions, 6701 events. 4214/6701 cut-off events. For 1774534/1774537 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 41625 event pairs, 764 based on Foata normal form. 14/6695 useless extension candidates. Maximal degree in co-relation 79071. Up to 5224 conditions per place. [2024-06-21 21:13:41,611 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 494 selfloop transitions, 209 changer transitions 0/708 dead transitions. [2024-06-21 21:13:41,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 708 transitions, 12737 flow [2024-06-21 21:13:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:13:41,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:13:41,612 INFO L175 Difference]: Start difference. First operand has 444 places, 686 transitions, 10987 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:13:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 708 transitions, 12737 flow [2024-06-21 21:13:47,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 708 transitions, 12040 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 21:13:47,926 INFO L231 Difference]: Finished difference. Result has 442 places, 688 transitions, 10846 flow [2024-06-21 21:13:47,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10290, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10846, PETRI_PLACES=442, PETRI_TRANSITIONS=688} [2024-06-21 21:13:47,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 21:13:47,926 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 688 transitions, 10846 flow [2024-06-21 21:13:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:47,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:47,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:13:47,927 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:47,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1154869118, now seen corresponding path program 8 times [2024-06-21 21:13:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771081370] [2024-06-21 21:13:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:48,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:48,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771081370] [2024-06-21 21:13:48,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771081370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:48,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:48,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:48,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383387234] [2024-06-21 21:13:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:48,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:48,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 688 transitions, 10846 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:48,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:48,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:48,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:50,686 INFO L124 PetriNetUnfolderBase]: 4258/6813 cut-off events. [2024-06-21 21:13:50,686 INFO L125 PetriNetUnfolderBase]: For 1808885/1808888 co-relation queries the response was YES. [2024-06-21 21:13:50,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80271 conditions, 6813 events. 4258/6813 cut-off events. For 1808885/1808888 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42914 event pairs, 730 based on Foata normal form. 14/6807 useless extension candidates. Maximal degree in co-relation 80064. Up to 5292 conditions per place. [2024-06-21 21:13:50,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 230 changer transitions 0/710 dead transitions. [2024-06-21 21:13:50,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 710 transitions, 12604 flow [2024-06-21 21:13:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:13:50,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:13:50,803 INFO L175 Difference]: Start difference. First operand has 442 places, 688 transitions, 10846 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:13:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 710 transitions, 12604 flow [2024-06-21 21:13:56,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 710 transitions, 12100 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:56,203 INFO L231 Difference]: Finished difference. Result has 444 places, 690 transitions, 10944 flow [2024-06-21 21:13:56,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10342, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10944, PETRI_PLACES=444, PETRI_TRANSITIONS=690} [2024-06-21 21:13:56,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 21:13:56,204 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 690 transitions, 10944 flow [2024-06-21 21:13:56,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:56,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:56,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:56,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:13:56,204 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:13:56,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash -411764440, now seen corresponding path program 9 times [2024-06-21 21:13:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:56,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404111342] [2024-06-21 21:13:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:56,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:57,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404111342] [2024-06-21 21:13:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404111342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:57,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129402475] [2024-06-21 21:13:57,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:57,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:57,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:57,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 690 transitions, 10944 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:57,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:57,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:57,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:58,951 INFO L124 PetriNetUnfolderBase]: 4302/6845 cut-off events. [2024-06-21 21:13:58,951 INFO L125 PetriNetUnfolderBase]: For 1827015/1827018 co-relation queries the response was YES. [2024-06-21 21:13:59,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81340 conditions, 6845 events. 4302/6845 cut-off events. For 1827015/1827018 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42724 event pairs, 785 based on Foata normal form. 14/6839 useless extension candidates. Maximal degree in co-relation 81132. Up to 5360 conditions per place. [2024-06-21 21:13:59,075 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 490 selfloop transitions, 217 changer transitions 0/712 dead transitions. [2024-06-21 21:13:59,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 712 transitions, 12710 flow [2024-06-21 21:13:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:13:59,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:13:59,076 INFO L175 Difference]: Start difference. First operand has 444 places, 690 transitions, 10944 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:13:59,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 712 transitions, 12710 flow [2024-06-21 21:14:05,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 712 transitions, 12160 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 21:14:05,384 INFO L231 Difference]: Finished difference. Result has 446 places, 692 transitions, 10974 flow [2024-06-21 21:14:05,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10394, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10974, PETRI_PLACES=446, PETRI_TRANSITIONS=692} [2024-06-21 21:14:05,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 21:14:05,385 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 692 transitions, 10974 flow [2024-06-21 21:14:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:05,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:05,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:05,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:14:05,386 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:05,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:05,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1526093498, now seen corresponding path program 10 times [2024-06-21 21:14:05,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:05,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438944955] [2024-06-21 21:14:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:05,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438944955] [2024-06-21 21:14:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438944955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:06,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:14:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627960281] [2024-06-21 21:14:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:14:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:14:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:14:06,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:06,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 692 transitions, 10974 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:06,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:06,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:06,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:08,074 INFO L124 PetriNetUnfolderBase]: 4333/6884 cut-off events. [2024-06-21 21:14:08,075 INFO L125 PetriNetUnfolderBase]: For 1822410/1822413 co-relation queries the response was YES. [2024-06-21 21:14:08,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81489 conditions, 6884 events. 4333/6884 cut-off events. For 1822410/1822413 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42885 event pairs, 776 based on Foata normal form. 14/6878 useless extension candidates. Maximal degree in co-relation 81280. Up to 5201 conditions per place. [2024-06-21 21:14:08,203 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 224 changer transitions 0/718 dead transitions. [2024-06-21 21:14:08,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 718 transitions, 12870 flow [2024-06-21 21:14:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:14:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:14:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:14:08,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:14:08,204 INFO L175 Difference]: Start difference. First operand has 446 places, 692 transitions, 10974 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:14:08,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 718 transitions, 12870 flow [2024-06-21 21:14:14,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 718 transitions, 12342 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 21:14:14,450 INFO L231 Difference]: Finished difference. Result has 448 places, 694 transitions, 11043 flow [2024-06-21 21:14:14,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10446, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11043, PETRI_PLACES=448, PETRI_TRANSITIONS=694} [2024-06-21 21:14:14,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-21 21:14:14,451 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 694 transitions, 11043 flow [2024-06-21 21:14:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:14,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:14,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:14:14,451 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:14,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:14,452 INFO L85 PathProgramCache]: Analyzing trace with hash -400639966, now seen corresponding path program 6 times [2024-06-21 21:14:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:14,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378002481] [2024-06-21 21:14:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:15,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:15,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378002481] [2024-06-21 21:14:15,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378002481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:15,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:15,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:14:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748336145] [2024-06-21 21:14:15,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:15,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:14:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:14:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:14:15,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 694 transitions, 11043 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:17,298 INFO L124 PetriNetUnfolderBase]: 4408/6954 cut-off events. [2024-06-21 21:14:17,298 INFO L125 PetriNetUnfolderBase]: For 1851552/1851555 co-relation queries the response was YES. [2024-06-21 21:14:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84317 conditions, 6954 events. 4408/6954 cut-off events. For 1851552/1851555 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42841 event pairs, 817 based on Foata normal form. 5/6939 useless extension candidates. Maximal degree in co-relation 84107. Up to 4596 conditions per place. [2024-06-21 21:14:17,429 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 437 selfloop transitions, 287 changer transitions 0/729 dead transitions. [2024-06-21 21:14:17,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 729 transitions, 14271 flow [2024-06-21 21:14:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:14:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:14:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:14:17,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 21:14:17,430 INFO L175 Difference]: Start difference. First operand has 448 places, 694 transitions, 11043 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:14:17,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 729 transitions, 14271 flow [2024-06-21 21:14:23,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 729 transitions, 13724 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 21:14:23,092 INFO L231 Difference]: Finished difference. Result has 452 places, 705 transitions, 11640 flow [2024-06-21 21:14:23,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10496, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11640, PETRI_PLACES=452, PETRI_TRANSITIONS=705} [2024-06-21 21:14:23,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-21 21:14:23,093 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 705 transitions, 11640 flow [2024-06-21 21:14:23,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:23,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:14:23,093 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:23,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -411752536, now seen corresponding path program 7 times [2024-06-21 21:14:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735789286] [2024-06-21 21:14:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735789286] [2024-06-21 21:14:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735789286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:23,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:14:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560706399] [2024-06-21 21:14:23,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:14:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:14:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:14:23,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:23,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 705 transitions, 11640 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:23,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:23,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:23,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:25,995 INFO L124 PetriNetUnfolderBase]: 4455/7018 cut-off events. [2024-06-21 21:14:25,995 INFO L125 PetriNetUnfolderBase]: For 1937205/1937208 co-relation queries the response was YES. [2024-06-21 21:14:26,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86584 conditions, 7018 events. 4455/7018 cut-off events. For 1937205/1937208 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43116 event pairs, 834 based on Foata normal form. 5/7003 useless extension candidates. Maximal degree in co-relation 86372. Up to 4640 conditions per place. [2024-06-21 21:14:26,126 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 407 selfloop transitions, 326 changer transitions 0/738 dead transitions. [2024-06-21 21:14:26,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 738 transitions, 14770 flow [2024-06-21 21:14:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:14:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:14:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:14:26,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 21:14:26,127 INFO L175 Difference]: Start difference. First operand has 452 places, 705 transitions, 11640 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:14:26,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 738 transitions, 14770 flow [2024-06-21 21:14:33,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 738 transitions, 14183 flow, removed 160 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:33,441 INFO L231 Difference]: Finished difference. Result has 458 places, 717 transitions, 12496 flow [2024-06-21 21:14:33,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11111, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12496, PETRI_PLACES=458, PETRI_TRANSITIONS=717} [2024-06-21 21:14:33,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 21:14:33,442 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 717 transitions, 12496 flow [2024-06-21 21:14:33,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:33,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:33,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:14:33,442 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:33,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash -400652986, now seen corresponding path program 8 times [2024-06-21 21:14:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746911837] [2024-06-21 21:14:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:34,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:34,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746911837] [2024-06-21 21:14:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746911837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:34,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:34,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:14:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422918161] [2024-06-21 21:14:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:34,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:14:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:14:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:14:34,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:34,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 717 transitions, 12496 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:34,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:34,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:34,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:36,440 INFO L124 PetriNetUnfolderBase]: 4470/7040 cut-off events. [2024-06-21 21:14:36,440 INFO L125 PetriNetUnfolderBase]: For 1959783/1959786 co-relation queries the response was YES. [2024-06-21 21:14:36,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88022 conditions, 7040 events. 4470/7040 cut-off events. For 1959783/1959786 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43292 event pairs, 820 based on Foata normal form. 5/7025 useless extension candidates. Maximal degree in co-relation 87807. Up to 4654 conditions per place. [2024-06-21 21:14:36,582 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 439 selfloop transitions, 299 changer transitions 0/743 dead transitions. [2024-06-21 21:14:36,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 743 transitions, 15303 flow [2024-06-21 21:14:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:14:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:14:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 21:14:36,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:14:36,583 INFO L175 Difference]: Start difference. First operand has 458 places, 717 transitions, 12496 flow. Second operand 10 states and 192 transitions. [2024-06-21 21:14:36,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 743 transitions, 15303 flow [2024-06-21 21:14:43,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 743 transitions, 14752 flow, removed 163 selfloop flow, removed 5 redundant places. [2024-06-21 21:14:43,216 INFO L231 Difference]: Finished difference. Result has 463 places, 721 transitions, 12788 flow [2024-06-21 21:14:43,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11989, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12788, PETRI_PLACES=463, PETRI_TRANSITIONS=721} [2024-06-21 21:14:43,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-21 21:14:43,216 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 721 transitions, 12788 flow [2024-06-21 21:14:43,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:43,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:43,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:43,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:14:43,217 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:43,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -400639501, now seen corresponding path program 2 times [2024-06-21 21:14:43,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:43,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707506312] [2024-06-21 21:14:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:43,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:44,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:44,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707506312] [2024-06-21 21:14:44,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707506312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:44,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:44,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:14:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395466258] [2024-06-21 21:14:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:44,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:14:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:14:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:14:44,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:44,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 721 transitions, 12788 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:44,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:44,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:44,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:46,623 INFO L124 PetriNetUnfolderBase]: 4475/6991 cut-off events. [2024-06-21 21:14:46,623 INFO L125 PetriNetUnfolderBase]: For 1945872/1945884 co-relation queries the response was YES. [2024-06-21 21:14:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88724 conditions, 6991 events. 4475/6991 cut-off events. For 1945872/1945884 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42446 event pairs, 942 based on Foata normal form. 9/6995 useless extension candidates. Maximal degree in co-relation 88507. Up to 6536 conditions per place. [2024-06-21 21:14:46,751 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 668 selfloop transitions, 63 changer transitions 0/736 dead transitions. [2024-06-21 21:14:46,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 736 transitions, 14446 flow [2024-06-21 21:14:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:14:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:14:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:14:46,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:14:46,752 INFO L175 Difference]: Start difference. First operand has 463 places, 721 transitions, 12788 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:14:46,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 736 transitions, 14446 flow [2024-06-21 21:14:53,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 736 transitions, 13788 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-21 21:14:53,354 INFO L231 Difference]: Finished difference. Result has 467 places, 724 transitions, 12430 flow [2024-06-21 21:14:53,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12430, PETRI_PLACES=467, PETRI_TRANSITIONS=724} [2024-06-21 21:14:53,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 21:14:53,355 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 724 transitions, 12430 flow [2024-06-21 21:14:53,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:53,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:53,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:53,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:14:53,355 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:14:53,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:53,356 INFO L85 PathProgramCache]: Analyzing trace with hash -401027776, now seen corresponding path program 9 times [2024-06-21 21:14:53,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:53,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776018880] [2024-06-21 21:14:53,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:53,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:54,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776018880] [2024-06-21 21:14:54,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776018880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:54,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:54,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:14:54,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392961638] [2024-06-21 21:14:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:14:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:14:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:14:54,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:54,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 724 transitions, 12430 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:54,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:54,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:54,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:56,215 INFO L124 PetriNetUnfolderBase]: 4466/7033 cut-off events. [2024-06-21 21:14:56,215 INFO L125 PetriNetUnfolderBase]: For 1960798/1960801 co-relation queries the response was YES. [2024-06-21 21:14:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87336 conditions, 7033 events. 4466/7033 cut-off events. For 1960798/1960801 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43301 event pairs, 827 based on Foata normal form. 5/7018 useless extension candidates. Maximal degree in co-relation 87118. Up to 4654 conditions per place. [2024-06-21 21:14:56,351 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 440 selfloop transitions, 301 changer transitions 0/746 dead transitions. [2024-06-21 21:14:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 746 transitions, 15021 flow [2024-06-21 21:14:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:14:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:14:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:14:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 21:14:56,352 INFO L175 Difference]: Start difference. First operand has 467 places, 724 transitions, 12430 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:14:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 746 transitions, 15021 flow [2024-06-21 21:15:04,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 746 transitions, 14743 flow, removed 78 selfloop flow, removed 8 redundant places. [2024-06-21 21:15:04,024 INFO L231 Difference]: Finished difference. Result has 469 places, 725 transitions, 12854 flow [2024-06-21 21:15:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12152, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12854, PETRI_PLACES=469, PETRI_TRANSITIONS=725} [2024-06-21 21:15:04,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 21:15:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 725 transitions, 12854 flow [2024-06-21 21:15:04,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:04,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:15:04,026 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:04,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash -901513054, now seen corresponding path program 10 times [2024-06-21 21:15:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:04,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648354840] [2024-06-21 21:15:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648354840] [2024-06-21 21:15:04,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648354840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:04,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:04,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:15:04,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996090537] [2024-06-21 21:15:04,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:04,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:15:04,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:15:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:15:04,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:04,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 725 transitions, 12854 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:04,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:04,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:04,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:07,188 INFO L124 PetriNetUnfolderBase]: 4481/7095 cut-off events. [2024-06-21 21:15:07,189 INFO L125 PetriNetUnfolderBase]: For 1992102/1992105 co-relation queries the response was YES. [2024-06-21 21:15:07,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88790 conditions, 7095 events. 4481/7095 cut-off events. For 1992102/1992105 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 44208 event pairs, 788 based on Foata normal form. 5/7080 useless extension candidates. Maximal degree in co-relation 88571. Up to 4668 conditions per place. [2024-06-21 21:15:07,313 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 412 selfloop transitions, 333 changer transitions 0/750 dead transitions. [2024-06-21 21:15:07,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 750 transitions, 15582 flow [2024-06-21 21:15:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:15:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:15:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:15:07,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:15:07,314 INFO L175 Difference]: Start difference. First operand has 469 places, 725 transitions, 12854 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:15:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 750 transitions, 15582 flow [2024-06-21 21:15:13,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 750 transitions, 14860 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-21 21:15:13,672 INFO L231 Difference]: Finished difference. Result has 472 places, 729 transitions, 13019 flow [2024-06-21 21:15:13,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12138, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13019, PETRI_PLACES=472, PETRI_TRANSITIONS=729} [2024-06-21 21:15:13,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-21 21:15:13,672 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 729 transitions, 13019 flow [2024-06-21 21:15:13,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:13,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:15:13,672 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:13,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -901138264, now seen corresponding path program 11 times [2024-06-21 21:15:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:13,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59130329] [2024-06-21 21:15:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:13,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:14,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59130329] [2024-06-21 21:15:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59130329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:14,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:14,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:15:14,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530670037] [2024-06-21 21:15:14,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:14,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:15:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:15:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:15:14,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:14,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 729 transitions, 13019 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:14,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:14,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:14,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:16,771 INFO L124 PetriNetUnfolderBase]: 4552/7208 cut-off events. [2024-06-21 21:15:16,772 INFO L125 PetriNetUnfolderBase]: For 2094012/2094015 co-relation queries the response was YES. [2024-06-21 21:15:16,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91602 conditions, 7208 events. 4552/7208 cut-off events. For 2094012/2094015 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 45060 event pairs, 811 based on Foata normal form. 5/7193 useless extension candidates. Maximal degree in co-relation 91382. Up to 4727 conditions per place. [2024-06-21 21:15:16,915 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 427 selfloop transitions, 331 changer transitions 0/763 dead transitions. [2024-06-21 21:15:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 763 transitions, 16484 flow [2024-06-21 21:15:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:15:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:15:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 21:15:16,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:15:16,916 INFO L175 Difference]: Start difference. First operand has 472 places, 729 transitions, 13019 flow. Second operand 10 states and 192 transitions. [2024-06-21 21:15:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 763 transitions, 16484 flow [2024-06-21 21:15:23,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 763 transitions, 15454 flow, removed 107 selfloop flow, removed 9 redundant places. [2024-06-21 21:15:23,415 INFO L231 Difference]: Finished difference. Result has 474 places, 741 transitions, 13310 flow [2024-06-21 21:15:23,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12043, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13310, PETRI_PLACES=474, PETRI_TRANSITIONS=741} [2024-06-21 21:15:23,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-21 21:15:23,415 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 741 transitions, 13310 flow [2024-06-21 21:15:23,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:23,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:23,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 21:15:23,416 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -901124779, now seen corresponding path program 3 times [2024-06-21 21:15:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709825596] [2024-06-21 21:15:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:24,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:24,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709825596] [2024-06-21 21:15:24,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709825596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:24,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:24,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:15:24,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228811225] [2024-06-21 21:15:24,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:24,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:15:24,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:24,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:15:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:15:24,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:24,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 741 transitions, 13310 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:24,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:24,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:24,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:26,629 INFO L124 PetriNetUnfolderBase]: 4557/7117 cut-off events. [2024-06-21 21:15:26,629 INFO L125 PetriNetUnfolderBase]: For 2077161/2077173 co-relation queries the response was YES. [2024-06-21 21:15:26,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91467 conditions, 7117 events. 4557/7117 cut-off events. For 2077161/2077173 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43346 event pairs, 958 based on Foata normal form. 9/7121 useless extension candidates. Maximal degree in co-relation 91245. Up to 6650 conditions per place. [2024-06-21 21:15:26,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 685 selfloop transitions, 66 changer transitions 0/756 dead transitions. [2024-06-21 21:15:26,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 756 transitions, 15014 flow [2024-06-21 21:15:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:15:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:15:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 21:15:26,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:15:26,773 INFO L175 Difference]: Start difference. First operand has 474 places, 741 transitions, 13310 flow. Second operand 10 states and 168 transitions. [2024-06-21 21:15:26,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 756 transitions, 15014 flow [2024-06-21 21:15:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 756 transitions, 14261 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-21 21:15:34,993 INFO L231 Difference]: Finished difference. Result has 479 places, 744 transitions, 12869 flow [2024-06-21 21:15:34,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12557, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12869, PETRI_PLACES=479, PETRI_TRANSITIONS=744} [2024-06-21 21:15:34,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-21 21:15:34,993 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 744 transitions, 12869 flow [2024-06-21 21:15:34,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:34,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:34,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:34,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 21:15:34,993 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:34,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -901125244, now seen corresponding path program 12 times [2024-06-21 21:15:34,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:34,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915774363] [2024-06-21 21:15:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915774363] [2024-06-21 21:15:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915774363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:35,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:35,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:15:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629220777] [2024-06-21 21:15:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:35,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:15:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:15:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:15:36,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:36,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 744 transitions, 12869 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:36,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:36,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:36,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:38,013 INFO L124 PetriNetUnfolderBase]: 4552/7215 cut-off events. [2024-06-21 21:15:38,014 INFO L125 PetriNetUnfolderBase]: For 2091646/2091649 co-relation queries the response was YES. [2024-06-21 21:15:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90016 conditions, 7215 events. 4552/7215 cut-off events. For 2091646/2091649 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 45134 event pairs, 813 based on Foata normal form. 5/7200 useless extension candidates. Maximal degree in co-relation 89793. Up to 4732 conditions per place. [2024-06-21 21:15:38,152 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 430 selfloop transitions, 330 changer transitions 0/765 dead transitions. [2024-06-21 21:15:38,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 765 transitions, 15431 flow [2024-06-21 21:15:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:15:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:15:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:15:38,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:15:38,153 INFO L175 Difference]: Start difference. First operand has 479 places, 744 transitions, 12869 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:15:38,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 765 transitions, 15431 flow [2024-06-21 21:15:46,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 765 transitions, 14973 flow, removed 165 selfloop flow, removed 8 redundant places. [2024-06-21 21:15:46,616 INFO L231 Difference]: Finished difference. Result has 481 places, 744 transitions, 13079 flow [2024-06-21 21:15:46,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12411, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13079, PETRI_PLACES=481, PETRI_TRANSITIONS=744} [2024-06-21 21:15:46,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-21 21:15:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 744 transitions, 13079 flow [2024-06-21 21:15:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:46,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 21:15:46,617 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1391913241, now seen corresponding path program 4 times [2024-06-21 21:15:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757064507] [2024-06-21 21:15:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:46,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757064507] [2024-06-21 21:15:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757064507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:47,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:15:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305217646] [2024-06-21 21:15:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:47,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:15:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:15:47,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:15:47,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:47,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 744 transitions, 13079 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:47,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:47,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:47,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:50,092 INFO L124 PetriNetUnfolderBase]: 4557/7116 cut-off events. [2024-06-21 21:15:50,092 INFO L125 PetriNetUnfolderBase]: For 2089001/2089001 co-relation queries the response was YES. [2024-06-21 21:15:50,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91040 conditions, 7116 events. 4557/7116 cut-off events. For 2089001/2089001 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43280 event pairs, 1061 based on Foata normal form. 1/7115 useless extension candidates. Maximal degree in co-relation 90816. Up to 6723 conditions per place. [2024-06-21 21:15:50,228 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 728 selfloop transitions, 27 changer transitions 0/760 dead transitions. [2024-06-21 21:15:50,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 760 transitions, 14799 flow [2024-06-21 21:15:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:15:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:15:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-21 21:15:50,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-21 21:15:50,229 INFO L175 Difference]: Start difference. First operand has 481 places, 744 transitions, 13079 flow. Second operand 11 states and 175 transitions. [2024-06-21 21:15:50,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 760 transitions, 14799 flow [2024-06-21 21:15:56,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 760 transitions, 14136 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:15:56,877 INFO L231 Difference]: Finished difference. Result has 484 places, 747 transitions, 12657 flow [2024-06-21 21:15:56,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12416, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12657, PETRI_PLACES=484, PETRI_TRANSITIONS=747} [2024-06-21 21:15:56,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-21 21:15:56,878 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 747 transitions, 12657 flow [2024-06-21 21:15:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:15:56,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:15:56,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 21:15:56,879 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:15:56,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:15:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash -472596124, now seen corresponding path program 13 times [2024-06-21 21:15:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:15:56,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731721746] [2024-06-21 21:15:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:15:56,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:15:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:15:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:15:57,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:15:57,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731721746] [2024-06-21 21:15:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731721746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:15:57,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:15:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:15:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496221500] [2024-06-21 21:15:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:15:57,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:15:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:15:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:15:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:15:57,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:15:57,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 747 transitions, 12657 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:15:57,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:15:57,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:15:57,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:15:59,967 INFO L124 PetriNetUnfolderBase]: 4608/7206 cut-off events. [2024-06-21 21:15:59,967 INFO L125 PetriNetUnfolderBase]: For 2179893/2179896 co-relation queries the response was YES. [2024-06-21 21:16:00,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91790 conditions, 7206 events. 4608/7206 cut-off events. For 2179893/2179896 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44139 event pairs, 1033 based on Foata normal form. 5/7207 useless extension candidates. Maximal degree in co-relation 91565. Up to 6643 conditions per place. [2024-06-21 21:16:00,117 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 697 selfloop transitions, 72 changer transitions 0/774 dead transitions. [2024-06-21 21:16:00,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 774 transitions, 14991 flow [2024-06-21 21:16:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 21:16:00,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 21:16:00,118 INFO L175 Difference]: Start difference. First operand has 484 places, 747 transitions, 12657 flow. Second operand 10 states and 176 transitions. [2024-06-21 21:16:00,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 774 transitions, 14991 flow [2024-06-21 21:16:06,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 774 transitions, 14774 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-21 21:16:06,616 INFO L231 Difference]: Finished difference. Result has 486 places, 755 transitions, 12992 flow [2024-06-21 21:16:06,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12440, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12992, PETRI_PLACES=486, PETRI_TRANSITIONS=755} [2024-06-21 21:16:06,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-21 21:16:06,617 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 755 transitions, 12992 flow [2024-06-21 21:16:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:06,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:06,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:06,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 21:16:06,617 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:06,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -888612559, now seen corresponding path program 5 times [2024-06-21 21:16:06,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:06,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714397433] [2024-06-21 21:16:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714397433] [2024-06-21 21:16:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714397433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:07,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870874924] [2024-06-21 21:16:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:07,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:16:07,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 755 transitions, 12992 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:07,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:07,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:16:07,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:09,845 INFO L124 PetriNetUnfolderBase]: 4605/7190 cut-off events. [2024-06-21 21:16:09,846 INFO L125 PetriNetUnfolderBase]: For 2170283/2170295 co-relation queries the response was YES. [2024-06-21 21:16:09,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91810 conditions, 7190 events. 4605/7190 cut-off events. For 2170283/2170295 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43849 event pairs, 963 based on Foata normal form. 9/7194 useless extension candidates. Maximal degree in co-relation 91583. Up to 6718 conditions per place. [2024-06-21 21:16:09,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 695 selfloop transitions, 70 changer transitions 0/770 dead transitions. [2024-06-21 21:16:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 770 transitions, 14736 flow [2024-06-21 21:16:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 21:16:09,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 21:16:09,983 INFO L175 Difference]: Start difference. First operand has 486 places, 755 transitions, 12992 flow. Second operand 10 states and 167 transitions. [2024-06-21 21:16:09,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 770 transitions, 14736 flow [2024-06-21 21:16:19,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 770 transitions, 13848 flow, removed 112 selfloop flow, removed 9 redundant places. [2024-06-21 21:16:19,453 INFO L231 Difference]: Finished difference. Result has 487 places, 758 transitions, 12436 flow [2024-06-21 21:16:19,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12104, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12436, PETRI_PLACES=487, PETRI_TRANSITIONS=758} [2024-06-21 21:16:19,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-21 21:16:19,454 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 758 transitions, 12436 flow [2024-06-21 21:16:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:19,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 21:16:19,454 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:19,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1391465446, now seen corresponding path program 14 times [2024-06-21 21:16:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664798312] [2024-06-21 21:16:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664798312] [2024-06-21 21:16:20,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664798312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:20,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:20,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:20,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714365195] [2024-06-21 21:16:20,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:20,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:20,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:20,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:16:20,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 758 transitions, 12436 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:20,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:20,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:16:20,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:22,412 INFO L124 PetriNetUnfolderBase]: 4624/7320 cut-off events. [2024-06-21 21:16:22,412 INFO L125 PetriNetUnfolderBase]: For 2224667/2224670 co-relation queries the response was YES. [2024-06-21 21:16:22,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91370 conditions, 7320 events. 4624/7320 cut-off events. For 2224667/2224670 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45748 event pairs, 722 based on Foata normal form. 5/7305 useless extension candidates. Maximal degree in co-relation 91143. Up to 4797 conditions per place. [2024-06-21 21:16:22,563 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 410 selfloop transitions, 368 changer transitions 0/783 dead transitions. [2024-06-21 21:16:22,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 783 transitions, 15270 flow [2024-06-21 21:16:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:16:22,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:16:22,564 INFO L175 Difference]: Start difference. First operand has 487 places, 758 transitions, 12436 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:16:22,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 783 transitions, 15270 flow [2024-06-21 21:16:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 783 transitions, 14960 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-21 21:16:30,633 INFO L231 Difference]: Finished difference. Result has 489 places, 762 transitions, 13084 flow [2024-06-21 21:16:30,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12126, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13084, PETRI_PLACES=489, PETRI_TRANSITIONS=762} [2024-06-21 21:16:30,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 21:16:30,634 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 762 transitions, 13084 flow [2024-06-21 21:16:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:30,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:30,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:30,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 21:16:30,634 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:30,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash -473041594, now seen corresponding path program 15 times [2024-06-21 21:16:30,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:30,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878353802] [2024-06-21 21:16:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:30,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878353802] [2024-06-21 21:16:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878353802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:31,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:16:31,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318255421] [2024-06-21 21:16:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:31,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:16:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:16:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:16:31,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:16:31,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 762 transitions, 13084 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:31,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:31,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:16:31,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:33,754 INFO L124 PetriNetUnfolderBase]: 4615/7306 cut-off events. [2024-06-21 21:16:33,754 INFO L125 PetriNetUnfolderBase]: For 2220617/2220620 co-relation queries the response was YES. [2024-06-21 21:16:33,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92162 conditions, 7306 events. 4615/7306 cut-off events. For 2220617/2220620 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45715 event pairs, 723 based on Foata normal form. 5/7291 useless extension candidates. Maximal degree in co-relation 91934. Up to 4790 conditions per place. [2024-06-21 21:16:33,887 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 404 selfloop transitions, 373 changer transitions 0/782 dead transitions. [2024-06-21 21:16:33,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 782 transitions, 15392 flow [2024-06-21 21:16:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:16:33,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:16:33,894 INFO L175 Difference]: Start difference. First operand has 489 places, 762 transitions, 13084 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:16:33,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 782 transitions, 15392 flow [2024-06-21 21:16:43,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 782 transitions, 14138 flow, removed 193 selfloop flow, removed 10 redundant places. [2024-06-21 21:16:43,383 INFO L231 Difference]: Finished difference. Result has 489 places, 762 transitions, 12583 flow [2024-06-21 21:16:43,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11830, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12583, PETRI_PLACES=489, PETRI_TRANSITIONS=762} [2024-06-21 21:16:43,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 21:16:43,383 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 762 transitions, 12583 flow [2024-06-21 21:16:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:43,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 21:16:43,384 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:43,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1648967627, now seen corresponding path program 21 times [2024-06-21 21:16:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:43,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921735062] [2024-06-21 21:16:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921735062] [2024-06-21 21:16:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921735062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:44,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:44,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:16:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89388562] [2024-06-21 21:16:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:16:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:16:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:16:44,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:16:44,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 762 transitions, 12583 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:44,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:44,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:16:44,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:46,244 INFO L124 PetriNetUnfolderBase]: 4655/7268 cut-off events. [2024-06-21 21:16:46,244 INFO L125 PetriNetUnfolderBase]: For 2191805/2191808 co-relation queries the response was YES. [2024-06-21 21:16:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91130 conditions, 7268 events. 4655/7268 cut-off events. For 2191805/2191808 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44397 event pairs, 899 based on Foata normal form. 6/7270 useless extension candidates. Maximal degree in co-relation 90904. Up to 6594 conditions per place. [2024-06-21 21:16:46,396 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 704 selfloop transitions, 92 changer transitions 0/801 dead transitions. [2024-06-21 21:16:46,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 801 transitions, 14584 flow [2024-06-21 21:16:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:16:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:16:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:16:46,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:16:46,397 INFO L175 Difference]: Start difference. First operand has 489 places, 762 transitions, 12583 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:16:46,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 801 transitions, 14584 flow [2024-06-21 21:16:54,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 801 transitions, 13463 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-21 21:16:54,202 INFO L231 Difference]: Finished difference. Result has 492 places, 775 transitions, 12030 flow [2024-06-21 21:16:54,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11485, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12030, PETRI_PLACES=492, PETRI_TRANSITIONS=775} [2024-06-21 21:16:54,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-21 21:16:54,203 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 775 transitions, 12030 flow [2024-06-21 21:16:54,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:54,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:16:54,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:16:54,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 21:16:54,203 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:16:54,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:16:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 472834866, now seen corresponding path program 1 times [2024-06-21 21:16:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:16:54,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739718631] [2024-06-21 21:16:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:16:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:16:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:16:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:16:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:16:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739718631] [2024-06-21 21:16:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739718631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:16:55,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:16:55,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:16:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660520652] [2024-06-21 21:16:55,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:16:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:16:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:16:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:16:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:16:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:16:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 775 transitions, 12030 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:16:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:16:55,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:16:55,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:16:57,413 INFO L124 PetriNetUnfolderBase]: 4510/7121 cut-off events. [2024-06-21 21:16:57,413 INFO L125 PetriNetUnfolderBase]: For 2207549/2207549 co-relation queries the response was YES. [2024-06-21 21:16:57,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88648 conditions, 7121 events. 4510/7121 cut-off events. For 2207549/2207549 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44193 event pairs, 984 based on Foata normal form. 2/7112 useless extension candidates. Maximal degree in co-relation 88419. Up to 6424 conditions per place. [2024-06-21 21:16:57,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 732 selfloop transitions, 21 changer transitions 0/800 dead transitions. [2024-06-21 21:16:57,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 800 transitions, 13706 flow [2024-06-21 21:16:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:16:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:16:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:16:57,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:16:57,548 INFO L175 Difference]: Start difference. First operand has 492 places, 775 transitions, 12030 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:16:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 800 transitions, 13706 flow [2024-06-21 21:17:05,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 800 transitions, 12959 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:17:05,682 INFO L231 Difference]: Finished difference. Result has 489 places, 777 transitions, 11424 flow [2024-06-21 21:17:05,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11283, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11424, PETRI_PLACES=489, PETRI_TRANSITIONS=777} [2024-06-21 21:17:05,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 21:17:05,683 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 777 transitions, 11424 flow [2024-06-21 21:17:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:05,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 21:17:05,684 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1275559152, now seen corresponding path program 2 times [2024-06-21 21:17:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791667825] [2024-06-21 21:17:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791667825] [2024-06-21 21:17:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791667825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:06,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:06,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425500680] [2024-06-21 21:17:06,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:06,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:17:06,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 777 transitions, 11424 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:06,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:06,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:17:06,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:08,796 INFO L124 PetriNetUnfolderBase]: 4531/7157 cut-off events. [2024-06-21 21:17:08,796 INFO L125 PetriNetUnfolderBase]: For 2254390/2254390 co-relation queries the response was YES. [2024-06-21 21:17:08,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88675 conditions, 7157 events. 4531/7157 cut-off events. For 2254390/2254390 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 44563 event pairs, 1020 based on Foata normal form. 2/7148 useless extension candidates. Maximal degree in co-relation 88445. Up to 6460 conditions per place. [2024-06-21 21:17:08,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 728 selfloop transitions, 26 changer transitions 0/801 dead transitions. [2024-06-21 21:17:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 801 transitions, 13508 flow [2024-06-21 21:17:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:17:08,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:17:08,938 INFO L175 Difference]: Start difference. First operand has 489 places, 777 transitions, 11424 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:17:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 801 transitions, 13508 flow [2024-06-21 21:17:16,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 801 transitions, 13375 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 21:17:16,965 INFO L231 Difference]: Finished difference. Result has 490 places, 781 transitions, 11540 flow [2024-06-21 21:17:16,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11291, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11540, PETRI_PLACES=490, PETRI_TRANSITIONS=781} [2024-06-21 21:17:16,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-21 21:17:16,966 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 781 transitions, 11540 flow [2024-06-21 21:17:16,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:16,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:16,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 21:17:16,966 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:16,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1188719472, now seen corresponding path program 3 times [2024-06-21 21:17:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752898888] [2024-06-21 21:17:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:17,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:17,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752898888] [2024-06-21 21:17:17,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752898888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:17,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:17,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714850851] [2024-06-21 21:17:17,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:17,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:17,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:18,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:17:18,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 781 transitions, 11540 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:18,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:18,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:17:18,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:20,244 INFO L124 PetriNetUnfolderBase]: 4526/7150 cut-off events. [2024-06-21 21:17:20,244 INFO L125 PetriNetUnfolderBase]: For 2258349/2258349 co-relation queries the response was YES. [2024-06-21 21:17:20,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88332 conditions, 7150 events. 4526/7150 cut-off events. For 2258349/2258349 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 44472 event pairs, 1021 based on Foata normal form. 2/7141 useless extension candidates. Maximal degree in co-relation 88101. Up to 6470 conditions per place. [2024-06-21 21:17:20,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 729 selfloop transitions, 23 changer transitions 0/799 dead transitions. [2024-06-21 21:17:20,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 799 transitions, 13106 flow [2024-06-21 21:17:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:17:20,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:17:20,384 INFO L175 Difference]: Start difference. First operand has 490 places, 781 transitions, 11540 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:17:20,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 799 transitions, 13106 flow [2024-06-21 21:17:28,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 799 transitions, 12890 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:28,868 INFO L231 Difference]: Finished difference. Result has 493 places, 781 transitions, 11375 flow [2024-06-21 21:17:28,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11324, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11375, PETRI_PLACES=493, PETRI_TRANSITIONS=781} [2024-06-21 21:17:28,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-21 21:17:28,869 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 781 transitions, 11375 flow [2024-06-21 21:17:28,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:28,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:28,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 21:17:28,869 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:28,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1904298118, now seen corresponding path program 4 times [2024-06-21 21:17:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267564104] [2024-06-21 21:17:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:29,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:29,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267564104] [2024-06-21 21:17:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267564104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:29,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71878488] [2024-06-21 21:17:29,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:29,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:29,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:17:29,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 781 transitions, 11375 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:29,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:29,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:17:29,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:32,194 INFO L124 PetriNetUnfolderBase]: 4539/7173 cut-off events. [2024-06-21 21:17:32,194 INFO L125 PetriNetUnfolderBase]: For 2281022/2281022 co-relation queries the response was YES. [2024-06-21 21:17:32,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88368 conditions, 7173 events. 4539/7173 cut-off events. For 2281022/2281022 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44707 event pairs, 1017 based on Foata normal form. 2/7160 useless extension candidates. Maximal degree in co-relation 88136. Up to 6472 conditions per place. [2024-06-21 21:17:32,333 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 722 selfloop transitions, 34 changer transitions 0/803 dead transitions. [2024-06-21 21:17:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 803 transitions, 13088 flow [2024-06-21 21:17:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:17:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:17:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:17:32,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 21:17:32,334 INFO L175 Difference]: Start difference. First operand has 493 places, 781 transitions, 11375 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:17:32,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 803 transitions, 13088 flow [2024-06-21 21:17:40,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 803 transitions, 13037 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:17:40,773 INFO L231 Difference]: Finished difference. Result has 496 places, 787 transitions, 11558 flow [2024-06-21 21:17:40,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11324, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11558, PETRI_PLACES=496, PETRI_TRANSITIONS=787} [2024-06-21 21:17:40,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-21 21:17:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 787 transitions, 11558 flow [2024-06-21 21:17:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:40,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:40,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 21:17:40,773 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:40,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1754846832, now seen corresponding path program 5 times [2024-06-21 21:17:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498362074] [2024-06-21 21:17:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:41,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:41,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498362074] [2024-06-21 21:17:41,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498362074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:41,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:41,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:41,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462419188] [2024-06-21 21:17:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:41,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:41,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:17:41,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 787 transitions, 11558 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:41,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:41,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:17:41,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:44,046 INFO L124 PetriNetUnfolderBase]: 4547/7185 cut-off events. [2024-06-21 21:17:44,046 INFO L125 PetriNetUnfolderBase]: For 2310819/2310819 co-relation queries the response was YES. [2024-06-21 21:17:44,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89317 conditions, 7185 events. 4547/7185 cut-off events. For 2310819/2310819 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44822 event pairs, 1019 based on Foata normal form. 2/7172 useless extension candidates. Maximal degree in co-relation 89083. Up to 6502 conditions per place. [2024-06-21 21:17:44,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 731 selfloop transitions, 28 changer transitions 0/806 dead transitions. [2024-06-21 21:17:44,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 806 transitions, 13253 flow [2024-06-21 21:17:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:17:44,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:17:44,435 INFO L175 Difference]: Start difference. First operand has 496 places, 787 transitions, 11558 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:17:44,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 806 transitions, 13253 flow [2024-06-21 21:17:52,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 806 transitions, 13096 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 21:17:52,153 INFO L231 Difference]: Finished difference. Result has 499 places, 791 transitions, 11595 flow [2024-06-21 21:17:52,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11403, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11595, PETRI_PLACES=499, PETRI_TRANSITIONS=791} [2024-06-21 21:17:52,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 21:17:52,153 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 791 transitions, 11595 flow [2024-06-21 21:17:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:52,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:17:52,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:17:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 21:17:52,153 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:17:52,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:17:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1909808368, now seen corresponding path program 6 times [2024-06-21 21:17:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:17:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520944865] [2024-06-21 21:17:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:17:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:17:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:17:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:17:53,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:17:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520944865] [2024-06-21 21:17:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520944865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:17:53,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:17:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:17:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005166252] [2024-06-21 21:17:53,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:17:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:17:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:17:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:17:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:17:53,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:17:53,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 791 transitions, 11595 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:17:53,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:17:53,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:17:53,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:17:55,480 INFO L124 PetriNetUnfolderBase]: 4555/7197 cut-off events. [2024-06-21 21:17:55,480 INFO L125 PetriNetUnfolderBase]: For 2336162/2336162 co-relation queries the response was YES. [2024-06-21 21:17:55,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89597 conditions, 7197 events. 4555/7197 cut-off events. For 2336162/2336162 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 44869 event pairs, 1017 based on Foata normal form. 2/7184 useless extension candidates. Maximal degree in co-relation 89362. Up to 6494 conditions per place. [2024-06-21 21:17:55,740 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 729 selfloop transitions, 33 changer transitions 0/809 dead transitions. [2024-06-21 21:17:55,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 809 transitions, 13273 flow [2024-06-21 21:17:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:17:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:17:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:17:55,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:17:55,741 INFO L175 Difference]: Start difference. First operand has 499 places, 791 transitions, 11595 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:17:55,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 809 transitions, 13273 flow [2024-06-21 21:18:03,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 809 transitions, 13135 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 21:18:03,359 INFO L231 Difference]: Finished difference. Result has 503 places, 793 transitions, 11636 flow [2024-06-21 21:18:03,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11457, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11636, PETRI_PLACES=503, PETRI_TRANSITIONS=793} [2024-06-21 21:18:03,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-21 21:18:03,360 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 793 transitions, 11636 flow [2024-06-21 21:18:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:03,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:03,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:03,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 21:18:03,361 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:03,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:03,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1904082637, now seen corresponding path program 1 times [2024-06-21 21:18:03,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:03,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040523969] [2024-06-21 21:18:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:04,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040523969] [2024-06-21 21:18:04,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040523969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:04,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:04,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:18:04,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855908729] [2024-06-21 21:18:04,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:04,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:18:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:18:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:18:04,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:18:04,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 793 transitions, 11636 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:04,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:04,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:18:04,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:06,911 INFO L124 PetriNetUnfolderBase]: 4718/7367 cut-off events. [2024-06-21 21:18:06,911 INFO L125 PetriNetUnfolderBase]: For 2341098/2341098 co-relation queries the response was YES. [2024-06-21 21:18:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90707 conditions, 7367 events. 4718/7367 cut-off events. For 2341098/2341098 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 45137 event pairs, 1072 based on Foata normal form. 2/7367 useless extension candidates. Maximal degree in co-relation 90471. Up to 6925 conditions per place. [2024-06-21 21:18:07,055 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 774 selfloop transitions, 35 changer transitions 0/814 dead transitions. [2024-06-21 21:18:07,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 814 transitions, 13488 flow [2024-06-21 21:18:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:18:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:18:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:18:07,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:18:07,057 INFO L175 Difference]: Start difference. First operand has 503 places, 793 transitions, 11636 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:18:07,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 814 transitions, 13488 flow [2024-06-21 21:18:15,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 814 transitions, 13325 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 21:18:15,781 INFO L231 Difference]: Finished difference. Result has 506 places, 797 transitions, 11712 flow [2024-06-21 21:18:15,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11473, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11712, PETRI_PLACES=506, PETRI_TRANSITIONS=797} [2024-06-21 21:18:15,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-21 21:18:15,782 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 797 transitions, 11712 flow [2024-06-21 21:18:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:15,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:15,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:15,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 21:18:15,782 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:15,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash -724024228, now seen corresponding path program 7 times [2024-06-21 21:18:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575600646] [2024-06-21 21:18:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:16,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575600646] [2024-06-21 21:18:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575600646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:16,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357037006] [2024-06-21 21:18:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:16,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:18:16,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 797 transitions, 11712 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:16,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:16,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:18:16,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:19,189 INFO L124 PetriNetUnfolderBase]: 4573/7227 cut-off events. [2024-06-21 21:18:19,189 INFO L125 PetriNetUnfolderBase]: For 2392961/2392970 co-relation queries the response was YES. [2024-06-21 21:18:19,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90897 conditions, 7227 events. 4573/7227 cut-off events. For 2392961/2392970 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 45063 event pairs, 1011 based on Foata normal form. 4/7206 useless extension candidates. Maximal degree in co-relation 90660. Up to 6514 conditions per place. [2024-06-21 21:18:19,330 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 724 selfloop transitions, 45 changer transitions 0/816 dead transitions. [2024-06-21 21:18:19,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 816 transitions, 13461 flow [2024-06-21 21:18:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:18:19,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:18:19,331 INFO L175 Difference]: Start difference. First operand has 506 places, 797 transitions, 11712 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:18:19,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 816 transitions, 13461 flow [2024-06-21 21:18:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 816 transitions, 13099 flow, removed 73 selfloop flow, removed 10 redundant places. [2024-06-21 21:18:26,747 INFO L231 Difference]: Finished difference. Result has 506 places, 802 transitions, 11606 flow [2024-06-21 21:18:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11350, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11606, PETRI_PLACES=506, PETRI_TRANSITIONS=802} [2024-06-21 21:18:26,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-21 21:18:26,748 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 802 transitions, 11606 flow [2024-06-21 21:18:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:26,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:26,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 21:18:26,748 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:26,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 800974714, now seen corresponding path program 8 times [2024-06-21 21:18:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588753538] [2024-06-21 21:18:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:27,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:27,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588753538] [2024-06-21 21:18:27,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588753538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:27,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734553946] [2024-06-21 21:18:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:27,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:27,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:18:27,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 802 transitions, 11606 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:27,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:27,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:18:27,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:30,276 INFO L124 PetriNetUnfolderBase]: 4586/7246 cut-off events. [2024-06-21 21:18:30,277 INFO L125 PetriNetUnfolderBase]: For 2422934/2422943 co-relation queries the response was YES. [2024-06-21 21:18:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91580 conditions, 7246 events. 4586/7246 cut-off events. For 2422934/2422943 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 45236 event pairs, 1011 based on Foata normal form. 4/7225 useless extension candidates. Maximal degree in co-relation 91341. Up to 6532 conditions per place. [2024-06-21 21:18:30,420 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 728 selfloop transitions, 46 changer transitions 0/821 dead transitions. [2024-06-21 21:18:30,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 821 transitions, 13371 flow [2024-06-21 21:18:30,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:18:30,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:18:30,421 INFO L175 Difference]: Start difference. First operand has 506 places, 802 transitions, 11606 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:18:30,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 821 transitions, 13371 flow [2024-06-21 21:18:37,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 821 transitions, 13158 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 21:18:37,940 INFO L231 Difference]: Finished difference. Result has 510 places, 808 transitions, 11677 flow [2024-06-21 21:18:37,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11677, PETRI_PLACES=510, PETRI_TRANSITIONS=808} [2024-06-21 21:18:37,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-21 21:18:37,941 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 808 transitions, 11677 flow [2024-06-21 21:18:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:37,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:37,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 21:18:37,941 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:37,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:37,941 INFO L85 PathProgramCache]: Analyzing trace with hash -163830690, now seen corresponding path program 9 times [2024-06-21 21:18:37,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:37,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951146792] [2024-06-21 21:18:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:37,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951146792] [2024-06-21 21:18:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951146792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659393741] [2024-06-21 21:18:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:38,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:38,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:38,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:39,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:18:39,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 808 transitions, 11677 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:39,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:39,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:18:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:41,488 INFO L124 PetriNetUnfolderBase]: 4594/7258 cut-off events. [2024-06-21 21:18:41,489 INFO L125 PetriNetUnfolderBase]: For 2453030/2453039 co-relation queries the response was YES. [2024-06-21 21:18:41,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92312 conditions, 7258 events. 4594/7258 cut-off events. For 2453030/2453039 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 45309 event pairs, 1013 based on Foata normal form. 4/7237 useless extension candidates. Maximal degree in co-relation 92071. Up to 6544 conditions per place. [2024-06-21 21:18:41,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 729 selfloop transitions, 49 changer transitions 0/825 dead transitions. [2024-06-21 21:18:41,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 825 transitions, 13422 flow [2024-06-21 21:18:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:18:41,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:18:41,643 INFO L175 Difference]: Start difference. First operand has 510 places, 808 transitions, 11677 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:18:41,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 825 transitions, 13422 flow [2024-06-21 21:18:49,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 825 transitions, 13203 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 21:18:49,356 INFO L231 Difference]: Finished difference. Result has 513 places, 812 transitions, 11712 flow [2024-06-21 21:18:49,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11462, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11712, PETRI_PLACES=513, PETRI_TRANSITIONS=812} [2024-06-21 21:18:49,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-21 21:18:49,356 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 812 transitions, 11712 flow [2024-06-21 21:18:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:49,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:49,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 21:18:49,357 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:18:49,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash 795464464, now seen corresponding path program 10 times [2024-06-21 21:18:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:49,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523782673] [2024-06-21 21:18:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:50,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523782673] [2024-06-21 21:18:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523782673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:50,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:50,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:18:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963554210] [2024-06-21 21:18:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:18:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:18:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:18:50,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:18:50,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 812 transitions, 11712 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:50,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:50,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:18:50,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:52,949 INFO L124 PetriNetUnfolderBase]: 4589/7249 cut-off events. [2024-06-21 21:18:52,949 INFO L125 PetriNetUnfolderBase]: For 2446987/2446993 co-relation queries the response was YES. [2024-06-21 21:18:53,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91865 conditions, 7249 events. 4589/7249 cut-off events. For 2446987/2446993 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 45298 event pairs, 1014 based on Foata normal form. 2/7224 useless extension candidates. Maximal degree in co-relation 91623. Up to 6493 conditions per place. [2024-06-21 21:18:53,093 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 719 selfloop transitions, 62 changer transitions 0/828 dead transitions. [2024-06-21 21:18:53,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 828 transitions, 13440 flow [2024-06-21 21:18:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:18:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:18:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:18:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:18:53,094 INFO L175 Difference]: Start difference. First operand has 513 places, 812 transitions, 11712 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:18:53,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 828 transitions, 13440 flow [2024-06-21 21:19:01,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 828 transitions, 13245 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:01,569 INFO L231 Difference]: Finished difference. Result has 517 places, 814 transitions, 11772 flow [2024-06-21 21:19:01,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11772, PETRI_PLACES=517, PETRI_TRANSITIONS=814} [2024-06-21 21:19:01,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-21 21:19:01,570 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 814 transitions, 11772 flow [2024-06-21 21:19:01,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:01,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:01,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 21:19:01,571 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:01,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 801190195, now seen corresponding path program 2 times [2024-06-21 21:19:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997679875] [2024-06-21 21:19:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997679875] [2024-06-21 21:19:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997679875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:02,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:02,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:19:02,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56650366] [2024-06-21 21:19:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:02,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:19:02,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:02,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:19:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:19:02,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:19:02,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 814 transitions, 11772 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:02,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:02,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:19:02,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:05,285 INFO L124 PetriNetUnfolderBase]: 4752/7433 cut-off events. [2024-06-21 21:19:05,285 INFO L125 PetriNetUnfolderBase]: For 2453097/2453100 co-relation queries the response was YES. [2024-06-21 21:19:05,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93150 conditions, 7433 events. 4752/7433 cut-off events. For 2453097/2453100 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45780 event pairs, 1060 based on Foata normal form. 4/7433 useless extension candidates. Maximal degree in co-relation 92907. Up to 6892 conditions per place. [2024-06-21 21:19:05,427 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 761 selfloop transitions, 69 changer transitions 0/835 dead transitions. [2024-06-21 21:19:05,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 835 transitions, 13736 flow [2024-06-21 21:19:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:19:05,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:19:05,428 INFO L175 Difference]: Start difference. First operand has 517 places, 814 transitions, 11772 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:19:05,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 835 transitions, 13736 flow [2024-06-21 21:19:13,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 835 transitions, 13497 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:13,318 INFO L231 Difference]: Finished difference. Result has 520 places, 818 transitions, 11860 flow [2024-06-21 21:19:13,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11533, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11860, PETRI_PLACES=520, PETRI_TRANSITIONS=818} [2024-06-21 21:19:13,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-21 21:19:13,319 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 818 transitions, 11860 flow [2024-06-21 21:19:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:13,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:13,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 21:19:13,320 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:13,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -870297369, now seen corresponding path program 3 times [2024-06-21 21:19:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141451601] [2024-06-21 21:19:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:14,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:14,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141451601] [2024-06-21 21:19:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141451601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:14,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:14,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:19:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993318565] [2024-06-21 21:19:14,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:14,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:19:14,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:19:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:19:14,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:19:14,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 818 transitions, 11860 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:14,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:14,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:19:14,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:16,979 INFO L124 PetriNetUnfolderBase]: 4762/7445 cut-off events. [2024-06-21 21:19:16,979 INFO L125 PetriNetUnfolderBase]: For 2486498/2486501 co-relation queries the response was YES. [2024-06-21 21:19:17,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94186 conditions, 7445 events. 4762/7445 cut-off events. For 2486498/2486501 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 45801 event pairs, 1060 based on Foata normal form. 4/7445 useless extension candidates. Maximal degree in co-relation 93942. Up to 6906 conditions per place. [2024-06-21 21:19:17,122 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 764 selfloop transitions, 70 changer transitions 0/839 dead transitions. [2024-06-21 21:19:17,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 839 transitions, 13848 flow [2024-06-21 21:19:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 21:19:17,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:19:17,123 INFO L175 Difference]: Start difference. First operand has 520 places, 818 transitions, 11860 flow. Second operand 10 states and 174 transitions. [2024-06-21 21:19:17,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 839 transitions, 13848 flow [2024-06-21 21:19:25,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 839 transitions, 13352 flow, removed 83 selfloop flow, removed 10 redundant places. [2024-06-21 21:19:25,746 INFO L231 Difference]: Finished difference. Result has 520 places, 822 transitions, 11701 flow [2024-06-21 21:19:25,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11364, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11701, PETRI_PLACES=520, PETRI_TRANSITIONS=822} [2024-06-21 21:19:25,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-21 21:19:25,747 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 822 transitions, 11701 flow [2024-06-21 21:19:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:25,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:25,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 21:19:25,748 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:19:25,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -467308237, now seen corresponding path program 4 times [2024-06-21 21:19:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195364256] [2024-06-21 21:19:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195364256] [2024-06-21 21:19:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195364256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:26,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:19:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927746505] [2024-06-21 21:19:26,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:26,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:19:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:19:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:19:27,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:19:27,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 822 transitions, 11701 flow. Second operand has 12 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:27,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:27,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:19:27,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15