./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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-rel/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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 19:49:55,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:49:55,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:49:55,500 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:49:55,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:49:55,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:49:55,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:49:55,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:49:55,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:49:55,552 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:49:55,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:49:55,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:49:55,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:49:55,554 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:49:55,555 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:49:55,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:49:55,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:49:55,555 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:49:55,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:49:55,556 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:49:55,556 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:49:55,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:49:55,557 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:49:55,557 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:49:55,557 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:49:55,558 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:49:55,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:49:55,558 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:49:55,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:49:55,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:49:55,560 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:49:55,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:49:55,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:49:55,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:49:55,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:49:55,561 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:49:55,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:49:55,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:49:55,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:49:55,568 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:49:55,568 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:49:55,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:49:55,569 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:49:55,569 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:49:55,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:49:55,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:49:55,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:49:55,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:49:55,852 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:49:55,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:49:56,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:49:57,231 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:49:57,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:49:57,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa326ffe4/07ad157129ec42158b8c220ac0f367d5/FLAG3d6b3f360 [2024-06-21 19:49:57,260 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa326ffe4/07ad157129ec42158b8c220ac0f367d5 [2024-06-21 19:49:57,262 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:49:57,262 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:49:57,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 19:49:57,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:49:57,348 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:49:57,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:49:57,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:49:57,354 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:49:57,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:49:57" (1/2) ... [2024-06-21 19:49:57,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a08511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:49:57, skipping insertion in model container [2024-06-21 19:49:57,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:49:57" (1/2) ... [2024-06-21 19:49:57,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ac23ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:49:57, skipping insertion in model container [2024-06-21 19:49:57,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:49:57" (2/2) ... [2024-06-21 19:49:57,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a08511 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:49:57, skipping insertion in model container [2024-06-21 19:49:57,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:49:57" (2/2) ... [2024-06-21 19:49:57,361 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:49:57,391 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:49:57,393 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] ! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:49:57,393 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] ! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:49:57,393 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$r_buff0_thd3 >= 0LL) && (0LL - (long long )y$mem_tmp) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EAX - (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1 >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:49:57,393 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:49:57,394 INFO L106 edCorrectnessWitness]: ghost_update [L828-L828] multithreaded = 1; [2024-06-21 19:49:57,441 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:49:57,787 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:49:57,796 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:49:57,931 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:49:57,971 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:49:57,972 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:49:57 WrapperNode [2024-06-21 19:49:57,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:49:57,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:49:57,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:49:57,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:49:57,980 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,003 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,035 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 19:49:58,035 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:49:58,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:49:58,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:49:58,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:49:58,046 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,047 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,050 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,065 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 19:49:58,066 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,066 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,074 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,076 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,078 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,080 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:49:58,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:49:58,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:49:58,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:49:58,086 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 07:49:57" (1/1) ... [2024-06-21 19:49:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:49:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:49:58,137 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 19:49:58,149 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 19:49:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:49:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:49:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:49:58,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:49:58,192 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:49:58,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:49:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:49:58,193 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:49:58,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:49:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:49:58,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:49:58,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:49:58,195 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 19:49:58,347 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:49:58,348 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:49:58,733 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:49:58,733 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:49:58,912 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:49:58,912 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:49:58,913 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:49:58 BoogieIcfgContainer [2024-06-21 19:49:58,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:49:58,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:49:58,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:49:58,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:49:58,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:49:57" (1/4) ... [2024-06-21 19:49:58,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8d1587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:49:58, skipping insertion in model container [2024-06-21 19:49:58,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:49:57" (2/4) ... [2024-06-21 19:49:58,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8d1587 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:49:58, skipping insertion in model container [2024-06-21 19:49:58,921 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 07:49:57" (3/4) ... [2024-06-21 19:49:58,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8d1587 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:49:58, skipping insertion in model container [2024-06-21 19:49:58,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:49:58" (4/4) ... [2024-06-21 19:49:58,924 INFO L112 eAbstractionObserver]: Analyzing ICFG safe034_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 19:49:58,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:49:58,941 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:49:58,941 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:49:59,001 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:49:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:49:59,079 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:49:59,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:49:59,083 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 5. Compared 73 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 19:49:59,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:49:59,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:49:59,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:49:59,110 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;@57362bdd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:49:59,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:49:59,117 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:49:59,117 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 19:49:59,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:49:59,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:59,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:49:59,119 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 19:49:59,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 360629915, now seen corresponding path program 1 times [2024-06-21 19:49:59,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740501801] [2024-06-21 19:49:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:59,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:59,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740501801] [2024-06-21 19:49:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740501801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:59,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:59,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:49:59,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621765720] [2024-06-21 19:49:59,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:49:59,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:59,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:49:59,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:49:59,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-06-21 19:49:59,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-06-21 19:49:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:00,157 INFO L124 PetriNetUnfolderBase]: 196/400 cut-off events. [2024-06-21 19:50:00,158 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-21 19:50:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 400 events. 196/400 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2372 event pairs, 73 based on Foata normal form. 2/371 useless extension candidates. Maximal degree in co-relation 742. Up to 304 conditions per place. [2024-06-21 19:50:00,165 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 22 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-21 19:50:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 140 flow [2024-06-21 19:50:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:50:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:50:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-21 19:50:00,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-06-21 19:50:00,179 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 88 transitions. [2024-06-21 19:50:00,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 140 flow [2024-06-21 19:50:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:00,185 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 91 flow [2024-06-21 19:50:00,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 19:50:00,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-21 19:50:00,190 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 91 flow [2024-06-21 19:50:00,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:00,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:00,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:00,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:50:00,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:00,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1471908094, now seen corresponding path program 1 times [2024-06-21 19:50:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:00,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282002373] [2024-06-21 19:50:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:00,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:00,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:00,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282002373] [2024-06-21 19:50:00,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282002373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:00,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:00,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:50:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253696912] [2024-06-21 19:50:00,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:50:00,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:50:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:50:00,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:00,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 19:50:00,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:00,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:00,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:01,109 INFO L124 PetriNetUnfolderBase]: 313/630 cut-off events. [2024-06-21 19:50:01,110 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-21 19:50:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 630 events. 313/630 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3488 event pairs, 131 based on Foata normal form. 6/614 useless extension candidates. Maximal degree in co-relation 1299. Up to 468 conditions per place. [2024-06-21 19:50:01,117 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 32 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2024-06-21 19:50:01,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 225 flow [2024-06-21 19:50:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:50:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:50:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 19:50:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 19:50:01,120 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 91 flow. Second operand 5 states and 126 transitions. [2024-06-21 19:50:01,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 225 flow [2024-06-21 19:50:01,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:50:01,122 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 152 flow [2024-06-21 19:50:01,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 19:50:01,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-21 19:50:01,124 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 152 flow [2024-06-21 19:50:01,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 19:50:01,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:01,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:01,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:50:01,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:01,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:01,125 INFO L85 PathProgramCache]: Analyzing trace with hash 814896411, now seen corresponding path program 1 times [2024-06-21 19:50:01,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:01,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556629096] [2024-06-21 19:50:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:01,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:01,587 INFO 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 19:50:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556629096] [2024-06-21 19:50:01,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556629096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:01,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:50:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764361525] [2024-06-21 19:50:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:50:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:01,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:50:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:50:01,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-06-21 19:50:01,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:01,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:01,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-06-21 19:50:01,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:01,732 INFO L124 PetriNetUnfolderBase]: 262/560 cut-off events. [2024-06-21 19:50:01,733 INFO L125 PetriNetUnfolderBase]: For 235/237 co-relation queries the response was YES. [2024-06-21 19:50:01,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 560 events. 262/560 cut-off events. For 235/237 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3108 event pairs, 95 based on Foata normal form. 3/543 useless extension candidates. Maximal degree in co-relation 1252. Up to 393 conditions per place. [2024-06-21 19:50:01,739 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 26 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-06-21 19:50:01,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 240 flow [2024-06-21 19:50:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:50:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:50:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-21 19:50:01,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-06-21 19:50:01,744 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 152 flow. Second operand 4 states and 110 transitions. [2024-06-21 19:50:01,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 240 flow [2024-06-21 19:50:01,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 19:50:01,748 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 182 flow [2024-06-21 19:50:01,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-06-21 19:50:01,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 19:50:01,750 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 182 flow [2024-06-21 19:50:01,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:01,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:01,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:50:01,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:01,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1750409988, now seen corresponding path program 1 times [2024-06-21 19:50:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:01,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146466660] [2024-06-21 19:50:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:02,323 INFO 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 19:50:02,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:02,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146466660] [2024-06-21 19:50:02,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146466660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:02,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:02,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:02,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691760596] [2024-06-21 19:50:02,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:02,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:02,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:02,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:02,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:02,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:02,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:02,695 INFO L124 PetriNetUnfolderBase]: 364/746 cut-off events. [2024-06-21 19:50:02,695 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-21 19:50:02,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 746 events. 364/746 cut-off events. For 637/641 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4390 event pairs, 108 based on Foata normal form. 14/741 useless extension candidates. Maximal degree in co-relation 1881. Up to 470 conditions per place. [2024-06-21 19:50:02,701 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2024-06-21 19:50:02,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 357 flow [2024-06-21 19:50:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 19:50:02,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-21 19:50:02,703 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 182 flow. Second operand 7 states and 167 transitions. [2024-06-21 19:50:02,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 357 flow [2024-06-21 19:50:02,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 342 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:50:02,706 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 222 flow [2024-06-21 19:50:02,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=222, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-06-21 19:50:02,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 19:50:02,707 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 222 flow [2024-06-21 19:50:02,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:02,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:02,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:50:02,708 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 19:50:02,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1978488768, now seen corresponding path program 2 times [2024-06-21 19:50:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267125847] [2024-06-21 19:50:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:03,160 INFO 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 19:50:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267125847] [2024-06-21 19:50:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267125847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:03,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:03,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:03,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120986069] [2024-06-21 19:50:03,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:03,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:03,468 INFO L124 PetriNetUnfolderBase]: 405/835 cut-off events. [2024-06-21 19:50:03,468 INFO L125 PetriNetUnfolderBase]: For 962/966 co-relation queries the response was YES. [2024-06-21 19:50:03,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 835 events. 405/835 cut-off events. For 962/966 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5183 event pairs, 41 based on Foata normal form. 14/835 useless extension candidates. Maximal degree in co-relation 2177. Up to 345 conditions per place. [2024-06-21 19:50:03,474 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 15 changer transitions 0/65 dead transitions. [2024-06-21 19:50:03,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 384 flow [2024-06-21 19:50:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 19:50:03,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 19:50:03,476 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 222 flow. Second operand 6 states and 148 transitions. [2024-06-21 19:50:03,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 384 flow [2024-06-21 19:50:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 357 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:03,481 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 241 flow [2024-06-21 19:50:03,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-21 19:50:03,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 19:50:03,482 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 241 flow [2024-06-21 19:50:03,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:03,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:03,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:03,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:50:03,483 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 19:50:03,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash -552357824, now seen corresponding path program 3 times [2024-06-21 19:50:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818283506] [2024-06-21 19:50:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:03,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:03,870 INFO 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 19:50:03,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:03,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818283506] [2024-06-21 19:50:03,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818283506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:03,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:03,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119227957] [2024-06-21 19:50:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:03,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:03,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:03,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:03,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:03,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:04,178 INFO L124 PetriNetUnfolderBase]: 385/803 cut-off events. [2024-06-21 19:50:04,179 INFO L125 PetriNetUnfolderBase]: For 1147/1151 co-relation queries the response was YES. [2024-06-21 19:50:04,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 803 events. 385/803 cut-off events. For 1147/1151 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4935 event pairs, 33 based on Foata normal form. 14/807 useless extension candidates. Maximal degree in co-relation 2118. Up to 413 conditions per place. [2024-06-21 19:50:04,185 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 33 selfloop transitions, 14 changer transitions 0/59 dead transitions. [2024-06-21 19:50:04,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 355 flow [2024-06-21 19:50:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 19:50:04,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 19:50:04,187 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 241 flow. Second operand 6 states and 142 transitions. [2024-06-21 19:50:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 355 flow [2024-06-21 19:50:04,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 59 transitions, 330 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:04,191 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 243 flow [2024-06-21 19:50:04,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2024-06-21 19:50:04,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 19:50:04,195 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 243 flow [2024-06-21 19:50:04,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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 19:50:04,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:04,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:04,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:50:04,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:04,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1424776154, now seen corresponding path program 1 times [2024-06-21 19:50:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858608217] [2024-06-21 19:50:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:04,669 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 19:50:04,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:04,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858608217] [2024-06-21 19:50:04,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858608217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:04,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:04,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:50:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195878384] [2024-06-21 19:50:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:50:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:50:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:50:04,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:04,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 19:50:04,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:04,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:04,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:04,848 INFO L124 PetriNetUnfolderBase]: 390/802 cut-off events. [2024-06-21 19:50:04,848 INFO L125 PetriNetUnfolderBase]: For 1333/1337 co-relation queries the response was YES. [2024-06-21 19:50:04,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 802 events. 390/802 cut-off events. For 1333/1337 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4911 event pairs, 170 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 2204. Up to 619 conditions per place. [2024-06-21 19:50:04,855 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2024-06-21 19:50:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 403 flow [2024-06-21 19:50:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:50:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:50:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 19:50:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 19:50:04,857 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 243 flow. Second operand 5 states and 135 transitions. [2024-06-21 19:50:04,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 403 flow [2024-06-21 19:50:04,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 369 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:04,864 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 283 flow [2024-06-21 19:50:04,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-06-21 19:50:04,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 19:50:04,866 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 283 flow [2024-06-21 19:50:04,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 19:50:04,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:04,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:04,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:50:04,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:04,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:04,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1847026844, now seen corresponding path program 2 times [2024-06-21 19:50:04,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:04,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503274924] [2024-06-21 19:50:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:04,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:05,304 INFO 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 19:50:05,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:05,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503274924] [2024-06-21 19:50:05,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503274924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:05,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:05,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:50:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868364522] [2024-06-21 19:50:05,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:05,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:50:05,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:05,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:50:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:50:05,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:05,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 19:50:05,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:05,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:05,490 INFO L124 PetriNetUnfolderBase]: 387/795 cut-off events. [2024-06-21 19:50:05,490 INFO L125 PetriNetUnfolderBase]: For 1337/1341 co-relation queries the response was YES. [2024-06-21 19:50:05,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2310 conditions, 795 events. 387/795 cut-off events. For 1337/1341 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4881 event pairs, 174 based on Foata normal form. 1/776 useless extension candidates. Maximal degree in co-relation 2283. Up to 609 conditions per place. [2024-06-21 19:50:05,497 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 16 changer transitions 0/66 dead transitions. [2024-06-21 19:50:05,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 439 flow [2024-06-21 19:50:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:50:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:50:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 19:50:05,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-21 19:50:05,498 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 283 flow. Second operand 5 states and 134 transitions. [2024-06-21 19:50:05,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 439 flow [2024-06-21 19:50:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 430 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 19:50:05,503 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 360 flow [2024-06-21 19:50:05,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-21 19:50:05,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 19:50:05,504 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 360 flow [2024-06-21 19:50:05,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 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 19:50:05,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:05,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:05,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:50:05,505 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 19:50:05,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:05,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1847035772, now seen corresponding path program 1 times [2024-06-21 19:50:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:05,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340602642] [2024-06-21 19:50:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:05,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:06,158 INFO 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 19:50:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:06,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340602642] [2024-06-21 19:50:06,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340602642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:06,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:06,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:50:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353298231] [2024-06-21 19:50:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:06,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:50:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:50:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:50:06,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-06-21 19:50:06,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 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 19:50:06,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-06-21 19:50:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:06,362 INFO L124 PetriNetUnfolderBase]: 351/758 cut-off events. [2024-06-21 19:50:06,362 INFO L125 PetriNetUnfolderBase]: For 1530/1536 co-relation queries the response was YES. [2024-06-21 19:50:06,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 758 events. 351/758 cut-off events. For 1530/1536 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4720 event pairs, 84 based on Foata normal form. 10/749 useless extension candidates. Maximal degree in co-relation 2218. Up to 472 conditions per place. [2024-06-21 19:50:06,370 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 35 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 19:50:06,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 476 flow [2024-06-21 19:50:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:50:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:50:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 19:50:06,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 19:50:06,372 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 360 flow. Second operand 5 states and 132 transitions. [2024-06-21 19:50:06,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 476 flow [2024-06-21 19:50:06,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 457 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:50:06,377 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 370 flow [2024-06-21 19:50:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=370, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-06-21 19:50:06,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 19:50:06,379 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 370 flow [2024-06-21 19:50:06,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 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 19:50:06,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:06,379 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 19:50:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:50:06,380 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 19:50:06,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -889403751, now seen corresponding path program 1 times [2024-06-21 19:50:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980881307] [2024-06-21 19:50:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:07,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:07,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980881307] [2024-06-21 19:50:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980881307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940700976] [2024-06-21 19:50:07,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:07,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:07,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:07,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:07,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:07,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:07,298 INFO L124 PetriNetUnfolderBase]: 382/795 cut-off events. [2024-06-21 19:50:07,299 INFO L125 PetriNetUnfolderBase]: For 1887/1891 co-relation queries the response was YES. [2024-06-21 19:50:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 795 events. 382/795 cut-off events. For 1887/1891 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4913 event pairs, 155 based on Foata normal form. 4/781 useless extension candidates. Maximal degree in co-relation 2527. Up to 585 conditions per place. [2024-06-21 19:50:07,306 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-06-21 19:50:07,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 558 flow [2024-06-21 19:50:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 19:50:07,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-21 19:50:07,309 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 370 flow. Second operand 8 states and 185 transitions. [2024-06-21 19:50:07,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 558 flow [2024-06-21 19:50:07,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 533 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:07,317 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 398 flow [2024-06-21 19:50:07,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-06-21 19:50:07,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 19:50:07,319 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 398 flow [2024-06-21 19:50:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:07,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:07,320 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 19:50:07,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:50:07,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:07,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1229001051, now seen corresponding path program 2 times [2024-06-21 19:50:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:07,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805204750] [2024-06-21 19:50:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:08,076 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 19:50:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805204750] [2024-06-21 19:50:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805204750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:08,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:08,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:08,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463594868] [2024-06-21 19:50:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:08,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:08,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:08,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:08,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:08,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:08,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:08,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:08,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:08,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:08,362 INFO L124 PetriNetUnfolderBase]: 390/811 cut-off events. [2024-06-21 19:50:08,362 INFO L125 PetriNetUnfolderBase]: For 2198/2202 co-relation queries the response was YES. [2024-06-21 19:50:08,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 811 events. 390/811 cut-off events. For 2198/2202 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4991 event pairs, 155 based on Foata normal form. 2/795 useless extension candidates. Maximal degree in co-relation 2646. Up to 588 conditions per place. [2024-06-21 19:50:08,370 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 48 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 19:50:08,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 77 transitions, 582 flow [2024-06-21 19:50:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 19:50:08,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 19:50:08,372 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 398 flow. Second operand 6 states and 160 transitions. [2024-06-21 19:50:08,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 77 transitions, 582 flow [2024-06-21 19:50:08,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 533 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:08,380 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 410 flow [2024-06-21 19:50:08,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-06-21 19:50:08,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 19:50:08,381 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 410 flow [2024-06-21 19:50:08,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:08,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:08,381 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 19:50:08,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:50:08,382 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:08,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -884635207, now seen corresponding path program 1 times [2024-06-21 19:50:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:08,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600266171] [2024-06-21 19:50:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:08,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:09,006 INFO 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 19:50:09,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:09,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600266171] [2024-06-21 19:50:09,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600266171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:09,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45582596] [2024-06-21 19:50:09,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:09,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:09,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:09,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:09,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:09,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:09,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:09,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:09,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:09,265 INFO L124 PetriNetUnfolderBase]: 398/825 cut-off events. [2024-06-21 19:50:09,265 INFO L125 PetriNetUnfolderBase]: For 2600/2604 co-relation queries the response was YES. [2024-06-21 19:50:09,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780 conditions, 825 events. 398/825 cut-off events. For 2600/2604 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5046 event pairs, 163 based on Foata normal form. 2/807 useless extension candidates. Maximal degree in co-relation 2748. Up to 626 conditions per place. [2024-06-21 19:50:09,271 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 51 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-21 19:50:09,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 588 flow [2024-06-21 19:50:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 19:50:09,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 19:50:09,273 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 410 flow. Second operand 6 states and 158 transitions. [2024-06-21 19:50:09,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 588 flow [2024-06-21 19:50:09,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 543 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:09,280 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 418 flow [2024-06-21 19:50:09,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-21 19:50:09,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-21 19:50:09,282 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 418 flow [2024-06-21 19:50:09,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:09,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:09,283 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 19:50:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:50:09,283 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 19:50:09,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1171345115, now seen corresponding path program 3 times [2024-06-21 19:50:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:09,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959211180] [2024-06-21 19:50:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:09,936 INFO 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 19:50:09,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959211180] [2024-06-21 19:50:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959211180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:09,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412278501] [2024-06-21 19:50:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:09,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:09,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:09,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:09,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:09,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:09,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:09,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:10,187 INFO L124 PetriNetUnfolderBase]: 393/809 cut-off events. [2024-06-21 19:50:10,188 INFO L125 PetriNetUnfolderBase]: For 2960/2964 co-relation queries the response was YES. [2024-06-21 19:50:10,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 809 events. 393/809 cut-off events. For 2960/2964 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4982 event pairs, 166 based on Foata normal form. 2/791 useless extension candidates. Maximal degree in co-relation 2750. Up to 581 conditions per place. [2024-06-21 19:50:10,195 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 22 changer transitions 0/78 dead transitions. [2024-06-21 19:50:10,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 602 flow [2024-06-21 19:50:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 19:50:10,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 19:50:10,196 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 418 flow. Second operand 6 states and 159 transitions. [2024-06-21 19:50:10,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 602 flow [2024-06-21 19:50:10,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 565 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:10,208 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 460 flow [2024-06-21 19:50:10,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2024-06-21 19:50:10,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 19:50:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 460 flow [2024-06-21 19:50:10,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:10,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:10,211 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 19:50:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:50:10,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:10,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1171352059, now seen corresponding path program 2 times [2024-06-21 19:50:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:10,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908072795] [2024-06-21 19:50:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:10,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:10,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908072795] [2024-06-21 19:50:10,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908072795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:10,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:10,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:10,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781865631] [2024-06-21 19:50:10,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:10,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:10,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:10,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:10,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 460 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:10,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:10,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:11,000 INFO L124 PetriNetUnfolderBase]: 401/831 cut-off events. [2024-06-21 19:50:11,000 INFO L125 PetriNetUnfolderBase]: For 3486/3490 co-relation queries the response was YES. [2024-06-21 19:50:11,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 831 events. 401/831 cut-off events. For 3486/3490 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5134 event pairs, 168 based on Foata normal form. 2/813 useless extension candidates. Maximal degree in co-relation 2900. Up to 625 conditions per place. [2024-06-21 19:50:11,008 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 47 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2024-06-21 19:50:11,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 638 flow [2024-06-21 19:50:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 19:50:11,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 19:50:11,010 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 460 flow. Second operand 6 states and 157 transitions. [2024-06-21 19:50:11,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 638 flow [2024-06-21 19:50:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 575 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:11,019 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 466 flow [2024-06-21 19:50:11,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-06-21 19:50:11,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-21 19:50:11,020 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 466 flow [2024-06-21 19:50:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:11,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:11,021 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 19:50:11,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:50:11,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:11,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1179922939, now seen corresponding path program 3 times [2024-06-21 19:50:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:11,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262284172] [2024-06-21 19:50:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:11,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:11,714 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 19:50:11,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262284172] [2024-06-21 19:50:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262284172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:11,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:11,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131403686] [2024-06-21 19:50:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:11,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:11,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:11,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:11,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:11,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:11,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:11,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:11,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:11,925 INFO L124 PetriNetUnfolderBase]: 396/824 cut-off events. [2024-06-21 19:50:11,925 INFO L125 PetriNetUnfolderBase]: For 3722/3726 co-relation queries the response was YES. [2024-06-21 19:50:11,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 824 events. 396/824 cut-off events. For 3722/3726 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5095 event pairs, 165 based on Foata normal form. 2/806 useless extension candidates. Maximal degree in co-relation 2879. Up to 598 conditions per place. [2024-06-21 19:50:11,933 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 47 selfloop transitions, 23 changer transitions 0/83 dead transitions. [2024-06-21 19:50:11,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 682 flow [2024-06-21 19:50:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:11,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 19:50:11,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 19:50:11,935 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 466 flow. Second operand 6 states and 158 transitions. [2024-06-21 19:50:11,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 682 flow [2024-06-21 19:50:11,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 629 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:11,943 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 529 flow [2024-06-21 19:50:11,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=529, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-06-21 19:50:11,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 19:50:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 529 flow [2024-06-21 19:50:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:11,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:11,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:50:11,947 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:11,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 778780252, now seen corresponding path program 1 times [2024-06-21 19:50:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934075040] [2024-06-21 19:50:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:11,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:12,299 INFO 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 19:50:12,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:12,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934075040] [2024-06-21 19:50:12,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934075040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:12,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:12,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:12,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889225259] [2024-06-21 19:50:12,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:12,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:12,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:12,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:12,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:12,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:12,512 INFO L124 PetriNetUnfolderBase]: 404/861 cut-off events. [2024-06-21 19:50:12,512 INFO L125 PetriNetUnfolderBase]: For 4419/4423 co-relation queries the response was YES. [2024-06-21 19:50:12,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3115 conditions, 861 events. 404/861 cut-off events. For 4419/4423 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5447 event pairs, 68 based on Foata normal form. 2/842 useless extension candidates. Maximal degree in co-relation 3078. Up to 538 conditions per place. [2024-06-21 19:50:12,522 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 58 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-21 19:50:12,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 761 flow [2024-06-21 19:50:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:50:12,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:50:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 19:50:12,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 19:50:12,523 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 529 flow. Second operand 5 states and 135 transitions. [2024-06-21 19:50:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 761 flow [2024-06-21 19:50:12,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 693 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:12,534 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 576 flow [2024-06-21 19:50:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=576, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-06-21 19:50:12,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 19:50:12,535 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 576 flow [2024-06-21 19:50:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:12,535 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 19:50:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:50:12,536 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 19:50:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1060571538, now seen corresponding path program 2 times [2024-06-21 19:50:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:12,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876981993] [2024-06-21 19:50:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:12,907 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 19:50:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876981993] [2024-06-21 19:50:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876981993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:12,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:12,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:12,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525727035] [2024-06-21 19:50:12,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:12,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:12,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:12,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:12,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 576 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:12,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:12,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:13,125 INFO L124 PetriNetUnfolderBase]: 420/893 cut-off events. [2024-06-21 19:50:13,125 INFO L125 PetriNetUnfolderBase]: For 5052/5056 co-relation queries the response was YES. [2024-06-21 19:50:13,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3350 conditions, 893 events. 420/893 cut-off events. For 5052/5056 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5635 event pairs, 71 based on Foata normal form. 2/874 useless extension candidates. Maximal degree in co-relation 3311. Up to 536 conditions per place. [2024-06-21 19:50:13,133 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 54 selfloop transitions, 28 changer transitions 0/95 dead transitions. [2024-06-21 19:50:13,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 816 flow [2024-06-21 19:50:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 19:50:13,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 19:50:13,135 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 576 flow. Second operand 6 states and 160 transitions. [2024-06-21 19:50:13,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 816 flow [2024-06-21 19:50:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 779 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-21 19:50:13,150 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 672 flow [2024-06-21 19:50:13,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-06-21 19:50:13,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 19:50:13,151 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 672 flow [2024-06-21 19:50:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:13,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:13,151 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 19:50:13,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:50:13,152 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 19:50:13,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 6418906, now seen corresponding path program 3 times [2024-06-21 19:50:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761858607] [2024-06-21 19:50:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:13,473 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 19:50:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:13,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761858607] [2024-06-21 19:50:13,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761858607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:13,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:13,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665256938] [2024-06-21 19:50:13,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:13,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 672 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:13,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:13,743 INFO L124 PetriNetUnfolderBase]: 428/891 cut-off events. [2024-06-21 19:50:13,744 INFO L125 PetriNetUnfolderBase]: For 5381/5385 co-relation queries the response was YES. [2024-06-21 19:50:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 891 events. 428/891 cut-off events. For 5381/5385 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5572 event pairs, 64 based on Foata normal form. 2/875 useless extension candidates. Maximal degree in co-relation 3464. Up to 563 conditions per place. [2024-06-21 19:50:13,756 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 72 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-06-21 19:50:13,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 102 transitions, 944 flow [2024-06-21 19:50:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 19:50:13,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 19:50:13,758 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 672 flow. Second operand 6 states and 160 transitions. [2024-06-21 19:50:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 102 transitions, 944 flow [2024-06-21 19:50:13,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 875 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:13,775 INFO L231 Difference]: Finished difference. Result has 97 places, 85 transitions, 705 flow [2024-06-21 19:50:13,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=705, PETRI_PLACES=97, PETRI_TRANSITIONS=85} [2024-06-21 19:50:13,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 19:50:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 85 transitions, 705 flow [2024-06-21 19:50:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:13,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:50:13,777 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 19:50:13,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 253872024, now seen corresponding path program 4 times [2024-06-21 19:50:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:13,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133336980] [2024-06-21 19:50:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:14,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:14,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133336980] [2024-06-21 19:50:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133336980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770367256] [2024-06-21 19:50:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:14,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:14,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:14,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:14,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 85 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:14,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:14,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:14,403 INFO L124 PetriNetUnfolderBase]: 436/917 cut-off events. [2024-06-21 19:50:14,403 INFO L125 PetriNetUnfolderBase]: For 5500/5504 co-relation queries the response was YES. [2024-06-21 19:50:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3572 conditions, 917 events. 436/917 cut-off events. For 5500/5504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5872 event pairs, 59 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 3528. Up to 554 conditions per place. [2024-06-21 19:50:14,412 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 65 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-06-21 19:50:14,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 945 flow [2024-06-21 19:50:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 19:50:14,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 19:50:14,413 INFO L175 Difference]: Start difference. First operand has 97 places, 85 transitions, 705 flow. Second operand 6 states and 158 transitions. [2024-06-21 19:50:14,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 945 flow [2024-06-21 19:50:14,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 101 transitions, 891 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 19:50:14,430 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 738 flow [2024-06-21 19:50:14,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2024-06-21 19:50:14,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 19:50:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 738 flow [2024-06-21 19:50:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:14,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:14,432 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 19:50:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:50:14,432 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 19:50:14,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1978367896, now seen corresponding path program 5 times [2024-06-21 19:50:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483671364] [2024-06-21 19:50:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:14,852 INFO 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 19:50:14,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:14,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483671364] [2024-06-21 19:50:14,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483671364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:14,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710135960] [2024-06-21 19:50:14,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:14,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:14,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:14,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 738 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:14,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:15,064 INFO L124 PetriNetUnfolderBase]: 444/916 cut-off events. [2024-06-21 19:50:15,064 INFO L125 PetriNetUnfolderBase]: For 6246/6250 co-relation queries the response was YES. [2024-06-21 19:50:15,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 916 events. 444/916 cut-off events. For 6246/6250 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5852 event pairs, 96 based on Foata normal form. 2/895 useless extension candidates. Maximal degree in co-relation 3652. Up to 517 conditions per place. [2024-06-21 19:50:15,073 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 56 selfloop transitions, 34 changer transitions 0/103 dead transitions. [2024-06-21 19:50:15,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 103 transitions, 1050 flow [2024-06-21 19:50:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 19:50:15,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 19:50:15,074 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 738 flow. Second operand 6 states and 158 transitions. [2024-06-21 19:50:15,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 103 transitions, 1050 flow [2024-06-21 19:50:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 103 transitions, 979 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:15,090 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 816 flow [2024-06-21 19:50:15,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=816, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2024-06-21 19:50:15,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 19:50:15,091 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 816 flow [2024-06-21 19:50:15,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:15,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:15,091 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 19:50:15,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:50:15,091 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 19:50:15,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1743372454, now seen corresponding path program 6 times [2024-06-21 19:50:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:15,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708900318] [2024-06-21 19:50:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:15,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708900318] [2024-06-21 19:50:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708900318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:15,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835511224] [2024-06-21 19:50:15,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:15,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:15,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:15,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 816 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:15,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:15,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:15,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:15,806 INFO L124 PetriNetUnfolderBase]: 439/926 cut-off events. [2024-06-21 19:50:15,807 INFO L125 PetriNetUnfolderBase]: For 6030/6034 co-relation queries the response was YES. [2024-06-21 19:50:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 926 events. 439/926 cut-off events. For 6030/6034 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5908 event pairs, 70 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 3610. Up to 632 conditions per place. [2024-06-21 19:50:15,814 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-21 19:50:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 1018 flow [2024-06-21 19:50:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 19:50:15,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 19:50:15,817 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 816 flow. Second operand 6 states and 154 transitions. [2024-06-21 19:50:15,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 1018 flow [2024-06-21 19:50:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 898 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:15,837 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 733 flow [2024-06-21 19:50:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=733, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2024-06-21 19:50:15,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 19:50:15,838 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 733 flow [2024-06-21 19:50:15,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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 19:50:15,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:15,839 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 19:50:15,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:50:15,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -18464584, now seen corresponding path program 1 times [2024-06-21 19:50:15,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145371285] [2024-06-21 19:50:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:16,752 INFO 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 19:50:16,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145371285] [2024-06-21 19:50:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145371285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:16,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:16,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:16,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300383189] [2024-06-21 19:50:16,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:16,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:16,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:16,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:16,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 733 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:16,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:16,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:16,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:17,148 INFO L124 PetriNetUnfolderBase]: 451/940 cut-off events. [2024-06-21 19:50:17,149 INFO L125 PetriNetUnfolderBase]: For 6346/6350 co-relation queries the response was YES. [2024-06-21 19:50:17,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 940 events. 451/940 cut-off events. For 6346/6350 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5959 event pairs, 146 based on Foata normal form. 6/927 useless extension candidates. Maximal degree in co-relation 3516. Up to 676 conditions per place. [2024-06-21 19:50:17,158 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-21 19:50:17,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 999 flow [2024-06-21 19:50:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 19:50:17,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-21 19:50:17,161 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 733 flow. Second operand 9 states and 206 transitions. [2024-06-21 19:50:17,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 999 flow [2024-06-21 19:50:17,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 112 transitions, 920 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:17,178 INFO L231 Difference]: Finished difference. Result has 108 places, 92 transitions, 708 flow [2024-06-21 19:50:17,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=708, PETRI_PLACES=108, PETRI_TRANSITIONS=92} [2024-06-21 19:50:17,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 19:50:17,178 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 92 transitions, 708 flow [2024-06-21 19:50:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:17,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:17,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:17,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:50:17,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:17,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 262465720, now seen corresponding path program 2 times [2024-06-21 19:50:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000294993] [2024-06-21 19:50:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:18,166 INFO 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 19:50:18,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:18,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000294993] [2024-06-21 19:50:18,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000294993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:18,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:18,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:18,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236599229] [2024-06-21 19:50:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:18,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:18,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 19:50:18,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 92 transitions, 708 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:18,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:18,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 19:50:18,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:18,485 INFO L124 PetriNetUnfolderBase]: 463/968 cut-off events. [2024-06-21 19:50:18,485 INFO L125 PetriNetUnfolderBase]: For 6890/6894 co-relation queries the response was YES. [2024-06-21 19:50:18,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3648 conditions, 968 events. 463/968 cut-off events. For 6890/6894 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6187 event pairs, 146 based on Foata normal form. 4/951 useless extension candidates. Maximal degree in co-relation 3599. Up to 687 conditions per place. [2024-06-21 19:50:18,494 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-21 19:50:18,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 111 transitions, 968 flow [2024-06-21 19:50:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 19:50:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-21 19:50:18,497 INFO L175 Difference]: Start difference. First operand has 108 places, 92 transitions, 708 flow. Second operand 8 states and 195 transitions. [2024-06-21 19:50:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 111 transitions, 968 flow [2024-06-21 19:50:18,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 111 transitions, 924 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:18,518 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 726 flow [2024-06-21 19:50:18,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2024-06-21 19:50:18,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 19:50:18,519 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 726 flow [2024-06-21 19:50:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:18,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:18,520 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 19:50:18,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:50:18,520 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 19:50:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -39281926, now seen corresponding path program 3 times [2024-06-21 19:50:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698296388] [2024-06-21 19:50:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:19,309 INFO 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 19:50:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698296388] [2024-06-21 19:50:19,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698296388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:19,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745250418] [2024-06-21 19:50:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:19,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:19,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:19,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 726 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:19,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:19,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:19,603 INFO L124 PetriNetUnfolderBase]: 475/996 cut-off events. [2024-06-21 19:50:19,604 INFO L125 PetriNetUnfolderBase]: For 7570/7574 co-relation queries the response was YES. [2024-06-21 19:50:19,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 996 events. 475/996 cut-off events. For 7570/7574 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6416 event pairs, 146 based on Foata normal form. 4/979 useless extension candidates. Maximal degree in co-relation 3715. Up to 669 conditions per place. [2024-06-21 19:50:19,611 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 19:50:19,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 113 transitions, 992 flow [2024-06-21 19:50:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 19:50:19,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 19:50:19,613 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 726 flow. Second operand 7 states and 184 transitions. [2024-06-21 19:50:19,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 113 transitions, 992 flow [2024-06-21 19:50:19,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 940 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:19,633 INFO L231 Difference]: Finished difference. Result has 110 places, 94 transitions, 742 flow [2024-06-21 19:50:19,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=110, PETRI_TRANSITIONS=94} [2024-06-21 19:50:19,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 19:50:19,634 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 94 transitions, 742 flow [2024-06-21 19:50:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:19,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:19,635 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 19:50:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:50:19,635 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 800380698, now seen corresponding path program 4 times [2024-06-21 19:50:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849219610] [2024-06-21 19:50:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849219610] [2024-06-21 19:50:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849219610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:20,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:20,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978000285] [2024-06-21 19:50:20,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:20,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:20,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:20,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 94 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:20,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:20,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:20,736 INFO L124 PetriNetUnfolderBase]: 507/1051 cut-off events. [2024-06-21 19:50:20,737 INFO L125 PetriNetUnfolderBase]: For 9942/9946 co-relation queries the response was YES. [2024-06-21 19:50:20,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4173 conditions, 1051 events. 507/1051 cut-off events. For 9942/9946 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6903 event pairs, 164 based on Foata normal form. 4/1031 useless extension candidates. Maximal degree in co-relation 4124. Up to 717 conditions per place. [2024-06-21 19:50:20,745 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 76 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-21 19:50:20,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 1076 flow [2024-06-21 19:50:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 19:50:20,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 19:50:20,747 INFO L175 Difference]: Start difference. First operand has 110 places, 94 transitions, 742 flow. Second operand 7 states and 185 transitions. [2024-06-21 19:50:20,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 1076 flow [2024-06-21 19:50:20,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 1018 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:20,768 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 788 flow [2024-06-21 19:50:20,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=788, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2024-06-21 19:50:20,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 19:50:20,769 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 788 flow [2024-06-21 19:50:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:20,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:20,769 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 19:50:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:50:20,770 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:20,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 793714458, now seen corresponding path program 5 times [2024-06-21 19:50:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509626514] [2024-06-21 19:50:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:21,498 INFO 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 19:50:21,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:21,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509626514] [2024-06-21 19:50:21,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509626514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:21,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:21,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:21,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686511192] [2024-06-21 19:50:21,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:21,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:21,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:21,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:21,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 788 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:21,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:21,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:21,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:21,794 INFO L124 PetriNetUnfolderBase]: 499/1039 cut-off events. [2024-06-21 19:50:21,794 INFO L125 PetriNetUnfolderBase]: For 9249/9253 co-relation queries the response was YES. [2024-06-21 19:50:21,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3987 conditions, 1039 events. 499/1039 cut-off events. For 9249/9253 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6818 event pairs, 166 based on Foata normal form. 4/1019 useless extension candidates. Maximal degree in co-relation 3937. Up to 735 conditions per place. [2024-06-21 19:50:21,803 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 75 selfloop transitions, 23 changer transitions 0/111 dead transitions. [2024-06-21 19:50:21,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 111 transitions, 1018 flow [2024-06-21 19:50:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 19:50:21,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 19:50:21,805 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 788 flow. Second operand 7 states and 182 transitions. [2024-06-21 19:50:21,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 111 transitions, 1018 flow [2024-06-21 19:50:21,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 111 transitions, 943 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:21,828 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 763 flow [2024-06-21 19:50:21,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2024-06-21 19:50:21,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 19:50:21,829 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 763 flow [2024-06-21 19:50:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:21,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:21,830 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 19:50:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:50:21,830 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 19:50:21,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash 34619514, now seen corresponding path program 6 times [2024-06-21 19:50:21,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:21,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681978705] [2024-06-21 19:50:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:21,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:22,676 INFO 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 19:50:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681978705] [2024-06-21 19:50:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681978705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:22,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:22,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246588386] [2024-06-21 19:50:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:22,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:23,001 INFO L124 PetriNetUnfolderBase]: 491/1027 cut-off events. [2024-06-21 19:50:23,001 INFO L125 PetriNetUnfolderBase]: For 7553/7557 co-relation queries the response was YES. [2024-06-21 19:50:23,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3718 conditions, 1027 events. 491/1027 cut-off events. For 7553/7557 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6745 event pairs, 156 based on Foata normal form. 4/1009 useless extension candidates. Maximal degree in co-relation 3667. Up to 617 conditions per place. [2024-06-21 19:50:23,007 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 32 changer transitions 0/113 dead transitions. [2024-06-21 19:50:23,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 113 transitions, 1001 flow [2024-06-21 19:50:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 19:50:23,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 19:50:23,009 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 763 flow. Second operand 7 states and 183 transitions. [2024-06-21 19:50:23,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 113 transitions, 1001 flow [2024-06-21 19:50:23,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 113 transitions, 948 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:23,028 INFO L231 Difference]: Finished difference. Result has 116 places, 96 transitions, 778 flow [2024-06-21 19:50:23,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=778, PETRI_PLACES=116, PETRI_TRANSITIONS=96} [2024-06-21 19:50:23,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 19:50:23,029 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 96 transitions, 778 flow [2024-06-21 19:50:23,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:23,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:23,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:50:23,030 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 19:50:23,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1078792347, now seen corresponding path program 1 times [2024-06-21 19:50:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294893509] [2024-06-21 19:50:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:23,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:23,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:23,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294893509] [2024-06-21 19:50:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294893509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:23,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484343530] [2024-06-21 19:50:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:23,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:23,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 96 transitions, 778 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:23,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:23,871 INFO L124 PetriNetUnfolderBase]: 503/1074 cut-off events. [2024-06-21 19:50:23,872 INFO L125 PetriNetUnfolderBase]: For 8312/8316 co-relation queries the response was YES. [2024-06-21 19:50:23,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3932 conditions, 1074 events. 503/1074 cut-off events. For 8312/8316 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7157 event pairs, 62 based on Foata normal form. 4/1063 useless extension candidates. Maximal degree in co-relation 3880. Up to 568 conditions per place. [2024-06-21 19:50:23,882 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 83 selfloop transitions, 20 changer transitions 0/116 dead transitions. [2024-06-21 19:50:23,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 116 transitions, 1050 flow [2024-06-21 19:50:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 19:50:23,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 19:50:23,884 INFO L175 Difference]: Start difference. First operand has 116 places, 96 transitions, 778 flow. Second operand 6 states and 162 transitions. [2024-06-21 19:50:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 116 transitions, 1050 flow [2024-06-21 19:50:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 931 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:23,903 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 731 flow [2024-06-21 19:50:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=731, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-06-21 19:50:23,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 19:50:23,903 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 731 flow [2024-06-21 19:50:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:23,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:50:23,904 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 19:50:23,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash -758588751, now seen corresponding path program 2 times [2024-06-21 19:50:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984786818] [2024-06-21 19:50:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:24,473 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 19:50:24,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984786818] [2024-06-21 19:50:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984786818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524177704] [2024-06-21 19:50:24,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:24,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 731 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:24,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:24,802 INFO L124 PetriNetUnfolderBase]: 515/1100 cut-off events. [2024-06-21 19:50:24,802 INFO L125 PetriNetUnfolderBase]: For 8995/8999 co-relation queries the response was YES. [2024-06-21 19:50:24,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1100 events. 515/1100 cut-off events. For 8995/8999 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7360 event pairs, 60 based on Foata normal form. 4/1089 useless extension candidates. Maximal degree in co-relation 3827. Up to 551 conditions per place. [2024-06-21 19:50:24,812 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 76 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-21 19:50:24,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 997 flow [2024-06-21 19:50:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 19:50:24,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 19:50:24,814 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 731 flow. Second operand 6 states and 161 transitions. [2024-06-21 19:50:24,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 997 flow [2024-06-21 19:50:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 915 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:24,838 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 734 flow [2024-06-21 19:50:24,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=734, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-06-21 19:50:24,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 19:50:24,839 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 734 flow [2024-06-21 19:50:24,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:24,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:24,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:50:24,840 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 19:50:24,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1302040145, now seen corresponding path program 3 times [2024-06-21 19:50:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704755481] [2024-06-21 19:50:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:25,367 INFO 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 19:50:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:25,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704755481] [2024-06-21 19:50:25,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704755481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:25,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:25,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:25,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384004600] [2024-06-21 19:50:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:25,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:25,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:25,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:25,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:25,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 734 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:25,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:25,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:25,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:25,662 INFO L124 PetriNetUnfolderBase]: 527/1128 cut-off events. [2024-06-21 19:50:25,663 INFO L125 PetriNetUnfolderBase]: For 8634/8638 co-relation queries the response was YES. [2024-06-21 19:50:25,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3875 conditions, 1128 events. 527/1128 cut-off events. For 8634/8638 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7587 event pairs, 66 based on Foata normal form. 4/1115 useless extension candidates. Maximal degree in co-relation 3824. Up to 523 conditions per place. [2024-06-21 19:50:25,673 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 37 changer transitions 0/118 dead transitions. [2024-06-21 19:50:25,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 118 transitions, 1008 flow [2024-06-21 19:50:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 19:50:25,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 19:50:25,674 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 734 flow. Second operand 7 states and 186 transitions. [2024-06-21 19:50:25,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 118 transitions, 1008 flow [2024-06-21 19:50:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 939 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:25,695 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 770 flow [2024-06-21 19:50:25,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2024-06-21 19:50:25,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 19:50:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 770 flow [2024-06-21 19:50:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:25,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:25,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:50:25,697 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 19:50:25,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash -753940177, now seen corresponding path program 1 times [2024-06-21 19:50:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313278430] [2024-06-21 19:50:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:25,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:26,246 INFO 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 19:50:26,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313278430] [2024-06-21 19:50:26,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313278430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:26,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:26,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522615488] [2024-06-21 19:50:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:26,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:26,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 770 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:26,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:26,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:26,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:26,545 INFO L124 PetriNetUnfolderBase]: 539/1150 cut-off events. [2024-06-21 19:50:26,546 INFO L125 PetriNetUnfolderBase]: For 8532/8536 co-relation queries the response was YES. [2024-06-21 19:50:26,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3954 conditions, 1150 events. 539/1150 cut-off events. For 8532/8536 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7777 event pairs, 92 based on Foata normal form. 4/1131 useless extension candidates. Maximal degree in co-relation 3902. Up to 737 conditions per place. [2024-06-21 19:50:26,554 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 81 selfloop transitions, 21 changer transitions 0/115 dead transitions. [2024-06-21 19:50:26,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 115 transitions, 1022 flow [2024-06-21 19:50:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 19:50:26,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 19:50:26,557 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 770 flow. Second operand 6 states and 159 transitions. [2024-06-21 19:50:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 115 transitions, 1022 flow [2024-06-21 19:50:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 933 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:26,575 INFO L231 Difference]: Finished difference. Result has 120 places, 100 transitions, 746 flow [2024-06-21 19:50:26,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=746, PETRI_PLACES=120, PETRI_TRANSITIONS=100} [2024-06-21 19:50:26,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 19:50:26,575 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 100 transitions, 746 flow [2024-06-21 19:50:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:26,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:26,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:26,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:50:26,576 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 19:50:26,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1051014085, now seen corresponding path program 2 times [2024-06-21 19:50:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711348596] [2024-06-21 19:50:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:27,091 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 19:50:27,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711348596] [2024-06-21 19:50:27,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711348596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:27,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:27,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:27,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679924994] [2024-06-21 19:50:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:27,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:27,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:27,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 100 transitions, 746 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:27,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:27,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:27,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:27,389 INFO L124 PetriNetUnfolderBase]: 551/1178 cut-off events. [2024-06-21 19:50:27,389 INFO L125 PetriNetUnfolderBase]: For 8263/8267 co-relation queries the response was YES. [2024-06-21 19:50:27,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3958 conditions, 1178 events. 551/1178 cut-off events. For 8263/8267 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8011 event pairs, 96 based on Foata normal form. 4/1159 useless extension candidates. Maximal degree in co-relation 3905. Up to 731 conditions per place. [2024-06-21 19:50:27,399 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 74 selfloop transitions, 31 changer transitions 0/118 dead transitions. [2024-06-21 19:50:27,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 118 transitions, 1010 flow [2024-06-21 19:50:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 19:50:27,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 19:50:27,401 INFO L175 Difference]: Start difference. First operand has 120 places, 100 transitions, 746 flow. Second operand 7 states and 184 transitions. [2024-06-21 19:50:27,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 118 transitions, 1010 flow [2024-06-21 19:50:27,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:27,427 INFO L231 Difference]: Finished difference. Result has 123 places, 101 transitions, 786 flow [2024-06-21 19:50:27,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=786, PETRI_PLACES=123, PETRI_TRANSITIONS=101} [2024-06-21 19:50:27,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:50:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 101 transitions, 786 flow [2024-06-21 19:50:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:27,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:27,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:27,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:50:27,429 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 19:50:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1305392767, now seen corresponding path program 3 times [2024-06-21 19:50:27,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:27,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420068007] [2024-06-21 19:50:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:27,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420068007] [2024-06-21 19:50:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420068007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:27,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:27,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242104427] [2024-06-21 19:50:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:27,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:27,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:27,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:27,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:27,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 101 transitions, 786 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:27,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:27,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:27,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:28,195 INFO L124 PetriNetUnfolderBase]: 575/1230 cut-off events. [2024-06-21 19:50:28,195 INFO L125 PetriNetUnfolderBase]: For 9051/9055 co-relation queries the response was YES. [2024-06-21 19:50:28,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 1230 events. 575/1230 cut-off events. For 9051/9055 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8434 event pairs, 90 based on Foata normal form. 4/1211 useless extension candidates. Maximal degree in co-relation 4115. Up to 699 conditions per place. [2024-06-21 19:50:28,203 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-21 19:50:28,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 121 transitions, 1066 flow [2024-06-21 19:50:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 19:50:28,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 19:50:28,204 INFO L175 Difference]: Start difference. First operand has 123 places, 101 transitions, 786 flow. Second operand 7 states and 185 transitions. [2024-06-21 19:50:28,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 121 transitions, 1066 flow [2024-06-21 19:50:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 121 transitions, 997 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:28,231 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 843 flow [2024-06-21 19:50:28,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2024-06-21 19:50:28,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 19:50:28,232 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 843 flow [2024-06-21 19:50:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:28,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:28,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:50:28,233 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 19:50:28,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -198187329, now seen corresponding path program 4 times [2024-06-21 19:50:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890809964] [2024-06-21 19:50:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:28,715 INFO 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 19:50:28,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890809964] [2024-06-21 19:50:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890809964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:28,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:28,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785150271] [2024-06-21 19:50:28,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:28,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:28,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:28,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:28,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:28,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:29,025 INFO L124 PetriNetUnfolderBase]: 611/1318 cut-off events. [2024-06-21 19:50:29,025 INFO L125 PetriNetUnfolderBase]: For 10197/10201 co-relation queries the response was YES. [2024-06-21 19:50:29,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1318 events. 611/1318 cut-off events. For 10197/10201 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9233 event pairs, 101 based on Foata normal form. 6/1305 useless extension candidates. Maximal degree in co-relation 4479. Up to 814 conditions per place. [2024-06-21 19:50:29,036 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 98 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-06-21 19:50:29,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 1167 flow [2024-06-21 19:50:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 19:50:29,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-21 19:50:29,038 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 843 flow. Second operand 9 states and 209 transitions. [2024-06-21 19:50:29,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 1167 flow [2024-06-21 19:50:29,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 130 transitions, 1091 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:29,066 INFO L231 Difference]: Finished difference. Result has 132 places, 105 transitions, 847 flow [2024-06-21 19:50:29,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=847, PETRI_PLACES=132, PETRI_TRANSITIONS=105} [2024-06-21 19:50:29,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:50:29,067 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 105 transitions, 847 flow [2024-06-21 19:50:29,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:29,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:29,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:29,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:50:29,068 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 19:50:29,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1873642649, now seen corresponding path program 5 times [2024-06-21 19:50:29,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:29,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928649502] [2024-06-21 19:50:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:29,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:29,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:29,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928649502] [2024-06-21 19:50:29,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928649502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:29,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:29,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:29,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183831365] [2024-06-21 19:50:29,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:29,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:29,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:29,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:29,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 105 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:29,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:29,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:29,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:29,891 INFO L124 PetriNetUnfolderBase]: 643/1390 cut-off events. [2024-06-21 19:50:29,892 INFO L125 PetriNetUnfolderBase]: For 12235/12239 co-relation queries the response was YES. [2024-06-21 19:50:29,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4893 conditions, 1390 events. 643/1390 cut-off events. For 12235/12239 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9863 event pairs, 68 based on Foata normal form. 4/1379 useless extension candidates. Maximal degree in co-relation 4834. Up to 658 conditions per place. [2024-06-21 19:50:29,903 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 92 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2024-06-21 19:50:29,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 1221 flow [2024-06-21 19:50:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 19:50:29,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 19:50:29,904 INFO L175 Difference]: Start difference. First operand has 132 places, 105 transitions, 847 flow. Second operand 7 states and 183 transitions. [2024-06-21 19:50:29,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 1221 flow [2024-06-21 19:50:29,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 128 transitions, 1161 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:29,942 INFO L231 Difference]: Finished difference. Result has 133 places, 107 transitions, 883 flow [2024-06-21 19:50:29,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=133, PETRI_TRANSITIONS=107} [2024-06-21 19:50:29,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 19:50:29,943 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 107 transitions, 883 flow [2024-06-21 19:50:29,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:29,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:29,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:29,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:50:29,944 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 19:50:29,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:29,945 INFO L85 PathProgramCache]: Analyzing trace with hash -518853929, now seen corresponding path program 6 times [2024-06-21 19:50:29,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:29,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080146857] [2024-06-21 19:50:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:30,421 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 19:50:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080146857] [2024-06-21 19:50:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080146857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:30,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233183543] [2024-06-21 19:50:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:30,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:30,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 107 transitions, 883 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:30,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:30,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:30,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:30,815 INFO L124 PetriNetUnfolderBase]: 722/1553 cut-off events. [2024-06-21 19:50:30,815 INFO L125 PetriNetUnfolderBase]: For 11541/11545 co-relation queries the response was YES. [2024-06-21 19:50:30,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5297 conditions, 1553 events. 722/1553 cut-off events. For 11541/11545 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11311 event pairs, 52 based on Foata normal form. 6/1545 useless extension candidates. Maximal degree in co-relation 5237. Up to 728 conditions per place. [2024-06-21 19:50:30,826 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2024-06-21 19:50:30,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 150 transitions, 1356 flow [2024-06-21 19:50:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:50:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:50:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-21 19:50:30,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-21 19:50:30,828 INFO L175 Difference]: Start difference. First operand has 133 places, 107 transitions, 883 flow. Second operand 11 states and 252 transitions. [2024-06-21 19:50:30,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 150 transitions, 1356 flow [2024-06-21 19:50:30,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 150 transitions, 1285 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:30,866 INFO L231 Difference]: Finished difference. Result has 143 places, 122 transitions, 1060 flow [2024-06-21 19:50:30,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1060, PETRI_PLACES=143, PETRI_TRANSITIONS=122} [2024-06-21 19:50:30,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 19:50:30,867 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 122 transitions, 1060 flow [2024-06-21 19:50:30,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:30,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:30,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:30,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:50:30,868 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 19:50:30,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash -612815719, now seen corresponding path program 7 times [2024-06-21 19:50:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747266912] [2024-06-21 19:50:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:31,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747266912] [2024-06-21 19:50:31,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747266912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:31,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:31,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:31,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046624027] [2024-06-21 19:50:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:31,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:31,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:31,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:31,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:31,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 122 transitions, 1060 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:31,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:31,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:31,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:31,921 INFO L124 PetriNetUnfolderBase]: 734/1579 cut-off events. [2024-06-21 19:50:31,921 INFO L125 PetriNetUnfolderBase]: For 12339/12343 co-relation queries the response was YES. [2024-06-21 19:50:31,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 1579 events. 734/1579 cut-off events. For 12339/12343 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11516 event pairs, 75 based on Foata normal form. 6/1569 useless extension candidates. Maximal degree in co-relation 5574. Up to 684 conditions per place. [2024-06-21 19:50:31,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 39 changer transitions 0/142 dead transitions. [2024-06-21 19:50:31,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 142 transitions, 1388 flow [2024-06-21 19:50:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-21 19:50:31,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 19:50:31,933 INFO L175 Difference]: Start difference. First operand has 143 places, 122 transitions, 1060 flow. Second operand 9 states and 204 transitions. [2024-06-21 19:50:31,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 142 transitions, 1388 flow [2024-06-21 19:50:31,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 1323 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:31,963 INFO L231 Difference]: Finished difference. Result has 145 places, 123 transitions, 1103 flow [2024-06-21 19:50:31,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=145, PETRI_TRANSITIONS=123} [2024-06-21 19:50:31,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 19:50:31,963 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 123 transitions, 1103 flow [2024-06-21 19:50:31,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:31,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:50:31,964 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 19:50:31,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1221733223, now seen corresponding path program 8 times [2024-06-21 19:50:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951086525] [2024-06-21 19:50:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:32,538 INFO 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 19:50:32,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951086525] [2024-06-21 19:50:32,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951086525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:32,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:32,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740593626] [2024-06-21 19:50:32,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:32,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:32,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:32,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 123 transitions, 1103 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:32,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:32,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:32,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:32,921 INFO L124 PetriNetUnfolderBase]: 766/1645 cut-off events. [2024-06-21 19:50:32,921 INFO L125 PetriNetUnfolderBase]: For 16295/16299 co-relation queries the response was YES. [2024-06-21 19:50:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 1645 events. 766/1645 cut-off events. For 16295/16299 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12136 event pairs, 105 based on Foata normal form. 4/1630 useless extension candidates. Maximal degree in co-relation 6123. Up to 603 conditions per place. [2024-06-21 19:50:32,932 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 86 selfloop transitions, 44 changer transitions 0/143 dead transitions. [2024-06-21 19:50:32,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 143 transitions, 1515 flow [2024-06-21 19:50:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 19:50:32,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 19:50:32,937 INFO L175 Difference]: Start difference. First operand has 145 places, 123 transitions, 1103 flow. Second operand 7 states and 181 transitions. [2024-06-21 19:50:32,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 143 transitions, 1515 flow [2024-06-21 19:50:32,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 143 transitions, 1425 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:32,981 INFO L231 Difference]: Finished difference. Result has 146 places, 125 transitions, 1159 flow [2024-06-21 19:50:32,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1159, PETRI_PLACES=146, PETRI_TRANSITIONS=125} [2024-06-21 19:50:32,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 19:50:32,982 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 125 transitions, 1159 flow [2024-06-21 19:50:32,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:32,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:32,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:32,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:50:32,983 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 19:50:32,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash 822607691, now seen corresponding path program 9 times [2024-06-21 19:50:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:32,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185481625] [2024-06-21 19:50:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:32,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:33,429 INFO 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 19:50:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:33,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185481625] [2024-06-21 19:50:33,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185481625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:33,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:33,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:33,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466525437] [2024-06-21 19:50:33,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:33,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:33,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:33,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:33,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 125 transitions, 1159 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:33,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:33,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:33,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:33,755 INFO L124 PetriNetUnfolderBase]: 758/1635 cut-off events. [2024-06-21 19:50:33,756 INFO L125 PetriNetUnfolderBase]: For 14799/14803 co-relation queries the response was YES. [2024-06-21 19:50:33,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5983 conditions, 1635 events. 758/1635 cut-off events. For 14799/14803 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12081 event pairs, 101 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 5920. Up to 599 conditions per place. [2024-06-21 19:50:33,766 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 87 selfloop transitions, 42 changer transitions 0/142 dead transitions. [2024-06-21 19:50:33,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 142 transitions, 1455 flow [2024-06-21 19:50:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 19:50:33,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 19:50:33,768 INFO L175 Difference]: Start difference. First operand has 146 places, 125 transitions, 1159 flow. Second operand 7 states and 180 transitions. [2024-06-21 19:50:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 142 transitions, 1455 flow [2024-06-21 19:50:33,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 142 transitions, 1353 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:33,807 INFO L231 Difference]: Finished difference. Result has 150 places, 125 transitions, 1145 flow [2024-06-21 19:50:33,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1145, PETRI_PLACES=150, PETRI_TRANSITIONS=125} [2024-06-21 19:50:33,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 19:50:33,808 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 125 transitions, 1145 flow [2024-06-21 19:50:33,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:33,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:33,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:50:33,809 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 19:50:33,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1906650615, now seen corresponding path program 4 times [2024-06-21 19:50:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:33,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605420782] [2024-06-21 19:50:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:34,276 INFO 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 19:50:34,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:34,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605420782] [2024-06-21 19:50:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605420782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:34,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379715013] [2024-06-21 19:50:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:34,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 125 transitions, 1145 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:34,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:34,619 INFO L124 PetriNetUnfolderBase]: 770/1641 cut-off events. [2024-06-21 19:50:34,619 INFO L125 PetriNetUnfolderBase]: For 14492/14496 co-relation queries the response was YES. [2024-06-21 19:50:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 1641 events. 770/1641 cut-off events. For 14492/14496 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 12006 event pairs, 151 based on Foata normal form. 4/1619 useless extension candidates. Maximal degree in co-relation 5968. Up to 1065 conditions per place. [2024-06-21 19:50:34,629 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 102 selfloop transitions, 30 changer transitions 0/145 dead transitions. [2024-06-21 19:50:34,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 145 transitions, 1477 flow [2024-06-21 19:50:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 19:50:34,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 19:50:34,630 INFO L175 Difference]: Start difference. First operand has 150 places, 125 transitions, 1145 flow. Second operand 7 states and 183 transitions. [2024-06-21 19:50:34,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 145 transitions, 1477 flow [2024-06-21 19:50:34,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 145 transitions, 1362 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:34,667 INFO L231 Difference]: Finished difference. Result has 150 places, 126 transitions, 1115 flow [2024-06-21 19:50:34,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1115, PETRI_PLACES=150, PETRI_TRANSITIONS=126} [2024-06-21 19:50:34,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 19:50:34,668 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 126 transitions, 1115 flow [2024-06-21 19:50:34,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:34,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:34,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:50:34,668 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 19:50:34,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash -875073607, now seen corresponding path program 5 times [2024-06-21 19:50:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760982536] [2024-06-21 19:50:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:34,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:35,122 INFO 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 19:50:35,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:35,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760982536] [2024-06-21 19:50:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760982536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:35,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:35,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872870156] [2024-06-21 19:50:35,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:35,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:35,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:35,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 126 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:35,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:35,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:35,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:35,448 INFO L124 PetriNetUnfolderBase]: 782/1683 cut-off events. [2024-06-21 19:50:35,448 INFO L125 PetriNetUnfolderBase]: For 15219/15223 co-relation queries the response was YES. [2024-06-21 19:50:35,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1683 events. 782/1683 cut-off events. For 15219/15223 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12511 event pairs, 135 based on Foata normal form. 4/1654 useless extension candidates. Maximal degree in co-relation 5956. Up to 1058 conditions per place. [2024-06-21 19:50:35,458 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 95 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-21 19:50:35,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 143 transitions, 1433 flow [2024-06-21 19:50:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 19:50:35,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 19:50:35,460 INFO L175 Difference]: Start difference. First operand has 150 places, 126 transitions, 1115 flow. Second operand 7 states and 181 transitions. [2024-06-21 19:50:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 143 transitions, 1433 flow [2024-06-21 19:50:35,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 143 transitions, 1360 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:35,523 INFO L231 Difference]: Finished difference. Result has 152 places, 127 transitions, 1138 flow [2024-06-21 19:50:35,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1138, PETRI_PLACES=152, PETRI_TRANSITIONS=127} [2024-06-21 19:50:35,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 19:50:35,524 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 127 transitions, 1138 flow [2024-06-21 19:50:35,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:35,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:35,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:35,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:50:35,524 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 19:50:35,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash 896229305, now seen corresponding path program 6 times [2024-06-21 19:50:35,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:35,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266039195] [2024-06-21 19:50:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:35,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266039195] [2024-06-21 19:50:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266039195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:36,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:36,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:36,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140936526] [2024-06-21 19:50:36,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:36,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:36,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 127 transitions, 1138 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:36,325 INFO L124 PetriNetUnfolderBase]: 794/1703 cut-off events. [2024-06-21 19:50:36,326 INFO L125 PetriNetUnfolderBase]: For 16181/16185 co-relation queries the response was YES. [2024-06-21 19:50:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 1703 events. 794/1703 cut-off events. For 16181/16185 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12658 event pairs, 133 based on Foata normal form. 4/1676 useless extension candidates. Maximal degree in co-relation 6070. Up to 1020 conditions per place. [2024-06-21 19:50:36,337 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 93 selfloop transitions, 39 changer transitions 0/145 dead transitions. [2024-06-21 19:50:36,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 145 transitions, 1464 flow [2024-06-21 19:50:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 19:50:36,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 19:50:36,341 INFO L175 Difference]: Start difference. First operand has 152 places, 127 transitions, 1138 flow. Second operand 7 states and 182 transitions. [2024-06-21 19:50:36,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 145 transitions, 1464 flow [2024-06-21 19:50:36,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 145 transitions, 1378 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:36,396 INFO L231 Difference]: Finished difference. Result has 154 places, 128 transitions, 1158 flow [2024-06-21 19:50:36,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1158, PETRI_PLACES=154, PETRI_TRANSITIONS=128} [2024-06-21 19:50:36,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 19:50:36,397 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 128 transitions, 1158 flow [2024-06-21 19:50:36,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:36,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:36,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:36,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:50:36,398 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 19:50:36,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2045140227, now seen corresponding path program 10 times [2024-06-21 19:50:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789842541] [2024-06-21 19:50:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:36,943 INFO 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 19:50:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:36,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789842541] [2024-06-21 19:50:36,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789842541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:36,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:36,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267011779] [2024-06-21 19:50:36,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:36,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:36,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:36,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:36,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 128 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:36,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:36,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:36,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:37,260 INFO L124 PetriNetUnfolderBase]: 826/1731 cut-off events. [2024-06-21 19:50:37,260 INFO L125 PetriNetUnfolderBase]: For 20678/20682 co-relation queries the response was YES. [2024-06-21 19:50:37,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6595 conditions, 1731 events. 826/1731 cut-off events. For 20678/20682 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12868 event pairs, 234 based on Foata normal form. 4/1698 useless extension candidates. Maximal degree in co-relation 6528. Up to 579 conditions per place. [2024-06-21 19:50:37,272 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 81 selfloop transitions, 53 changer transitions 0/147 dead transitions. [2024-06-21 19:50:37,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 147 transitions, 1652 flow [2024-06-21 19:50:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 19:50:37,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 19:50:37,274 INFO L175 Difference]: Start difference. First operand has 154 places, 128 transitions, 1158 flow. Second operand 7 states and 181 transitions. [2024-06-21 19:50:37,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 147 transitions, 1652 flow [2024-06-21 19:50:37,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 147 transitions, 1556 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:37,320 INFO L231 Difference]: Finished difference. Result has 156 places, 130 transitions, 1224 flow [2024-06-21 19:50:37,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1224, PETRI_PLACES=156, PETRI_TRANSITIONS=130} [2024-06-21 19:50:37,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 19:50:37,320 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 130 transitions, 1224 flow [2024-06-21 19:50:37,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:37,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:37,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:50:37,321 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 19:50:37,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1315131929, now seen corresponding path program 11 times [2024-06-21 19:50:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:37,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927546876] [2024-06-21 19:50:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:37,778 INFO 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 19:50:37,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:37,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927546876] [2024-06-21 19:50:37,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927546876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:37,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:37,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:37,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266710956] [2024-06-21 19:50:37,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:37,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:37,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:37,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:37,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 130 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:37,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:37,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:37,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:38,109 INFO L124 PetriNetUnfolderBase]: 818/1725 cut-off events. [2024-06-21 19:50:38,109 INFO L125 PetriNetUnfolderBase]: For 18713/18717 co-relation queries the response was YES. [2024-06-21 19:50:38,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6401 conditions, 1725 events. 818/1725 cut-off events. For 18713/18717 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12921 event pairs, 234 based on Foata normal form. 4/1692 useless extension candidates. Maximal degree in co-relation 6333. Up to 575 conditions per place. [2024-06-21 19:50:38,123 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 55 changer transitions 0/145 dead transitions. [2024-06-21 19:50:38,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 145 transitions, 1590 flow [2024-06-21 19:50:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 19:50:38,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 19:50:38,124 INFO L175 Difference]: Start difference. First operand has 156 places, 130 transitions, 1224 flow. Second operand 7 states and 179 transitions. [2024-06-21 19:50:38,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 145 transitions, 1590 flow [2024-06-21 19:50:38,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 145 transitions, 1434 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:38,166 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1182 flow [2024-06-21 19:50:38,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1182, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-06-21 19:50:38,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 19:50:38,167 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1182 flow [2024-06-21 19:50:38,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:38,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:38,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:38,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:50:38,168 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 19:50:38,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -343641575, now seen corresponding path program 12 times [2024-06-21 19:50:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:38,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623749792] [2024-06-21 19:50:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:38,631 INFO 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 19:50:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623749792] [2024-06-21 19:50:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623749792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:38,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:38,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113057865] [2024-06-21 19:50:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:38,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:38,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1182 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:38,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:38,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:38,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:38,969 INFO L124 PetriNetUnfolderBase]: 810/1757 cut-off events. [2024-06-21 19:50:38,969 INFO L125 PetriNetUnfolderBase]: For 15300/15304 co-relation queries the response was YES. [2024-06-21 19:50:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5973 conditions, 1757 events. 810/1757 cut-off events. For 15300/15304 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13223 event pairs, 191 based on Foata normal form. 4/1732 useless extension candidates. Maximal degree in co-relation 5905. Up to 1234 conditions per place. [2024-06-21 19:50:38,980 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 114 selfloop transitions, 17 changer transitions 0/144 dead transitions. [2024-06-21 19:50:38,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 144 transitions, 1476 flow [2024-06-21 19:50:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 19:50:38,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 19:50:38,981 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1182 flow. Second operand 7 states and 177 transitions. [2024-06-21 19:50:38,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 144 transitions, 1476 flow [2024-06-21 19:50:39,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 144 transitions, 1350 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:39,031 INFO L231 Difference]: Finished difference. Result has 161 places, 130 transitions, 1094 flow [2024-06-21 19:50:39,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1094, PETRI_PLACES=161, PETRI_TRANSITIONS=130} [2024-06-21 19:50:39,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 19:50:39,032 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 130 transitions, 1094 flow [2024-06-21 19:50:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:39,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:39,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:39,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:50:39,033 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 19:50:39,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1412961761, now seen corresponding path program 7 times [2024-06-21 19:50:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234063749] [2024-06-21 19:50:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:39,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234063749] [2024-06-21 19:50:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234063749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:39,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:39,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:39,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965175283] [2024-06-21 19:50:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:39,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:39,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:39,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:39,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 130 transitions, 1094 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:39,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:39,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:39,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:39,752 INFO L124 PetriNetUnfolderBase]: 842/1797 cut-off events. [2024-06-21 19:50:39,752 INFO L125 PetriNetUnfolderBase]: For 18652/18656 co-relation queries the response was YES. [2024-06-21 19:50:39,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 1797 events. 842/1797 cut-off events. For 18652/18656 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13587 event pairs, 178 based on Foata normal form. 4/1768 useless extension candidates. Maximal degree in co-relation 6114. Up to 1062 conditions per place. [2024-06-21 19:50:39,763 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 86 selfloop transitions, 49 changer transitions 0/148 dead transitions. [2024-06-21 19:50:39,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 148 transitions, 1524 flow [2024-06-21 19:50:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 19:50:39,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 19:50:39,764 INFO L175 Difference]: Start difference. First operand has 161 places, 130 transitions, 1094 flow. Second operand 7 states and 182 transitions. [2024-06-21 19:50:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 148 transitions, 1524 flow [2024-06-21 19:50:39,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 148 transitions, 1470 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:39,823 INFO L231 Difference]: Finished difference. Result has 161 places, 132 transitions, 1192 flow [2024-06-21 19:50:39,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1192, PETRI_PLACES=161, PETRI_TRANSITIONS=132} [2024-06-21 19:50:39,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 19:50:39,824 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 132 transitions, 1192 flow [2024-06-21 19:50:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:39,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:39,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:39,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:50:39,824 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 19:50:39,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1860513027, now seen corresponding path program 8 times [2024-06-21 19:50:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570380983] [2024-06-21 19:50:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:40,473 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 19:50:40,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:40,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570380983] [2024-06-21 19:50:40,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570380983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:40,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:40,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:40,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226228383] [2024-06-21 19:50:40,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:40,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:40,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:40,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:40,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:40,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 132 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:40,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:40,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:40,867 INFO L124 PetriNetUnfolderBase]: 878/1899 cut-off events. [2024-06-21 19:50:40,867 INFO L125 PetriNetUnfolderBase]: For 24064/24068 co-relation queries the response was YES. [2024-06-21 19:50:40,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6713 conditions, 1899 events. 878/1899 cut-off events. For 24064/24068 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14572 event pairs, 211 based on Foata normal form. 8/1876 useless extension candidates. Maximal degree in co-relation 6643. Up to 1310 conditions per place. [2024-06-21 19:50:40,880 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 120 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-06-21 19:50:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 152 transitions, 1566 flow [2024-06-21 19:50:40,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 19:50:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 19:50:40,881 INFO L175 Difference]: Start difference. First operand has 161 places, 132 transitions, 1192 flow. Second operand 8 states and 200 transitions. [2024-06-21 19:50:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 152 transitions, 1566 flow [2024-06-21 19:50:40,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 152 transitions, 1448 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:40,946 INFO L231 Difference]: Finished difference. Result has 166 places, 135 transitions, 1184 flow [2024-06-21 19:50:40,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=166, PETRI_TRANSITIONS=135} [2024-06-21 19:50:40,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 19:50:40,947 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 135 transitions, 1184 flow [2024-06-21 19:50:40,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:40,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:40,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:50:40,948 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 19:50:40,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1661791545, now seen corresponding path program 9 times [2024-06-21 19:50:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861239912] [2024-06-21 19:50:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:41,332 INFO 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 19:50:41,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861239912] [2024-06-21 19:50:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861239912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:41,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:41,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985429688] [2024-06-21 19:50:41,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:41,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:41,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 135 transitions, 1184 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:41,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:41,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:41,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:41,602 INFO L124 PetriNetUnfolderBase]: 870/1867 cut-off events. [2024-06-21 19:50:41,603 INFO L125 PetriNetUnfolderBase]: For 18024/18028 co-relation queries the response was YES. [2024-06-21 19:50:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6308 conditions, 1867 events. 870/1867 cut-off events. For 18024/18028 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14210 event pairs, 196 based on Foata normal form. 4/1834 useless extension candidates. Maximal degree in co-relation 6236. Up to 1160 conditions per place. [2024-06-21 19:50:41,614 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 90 selfloop transitions, 46 changer transitions 0/149 dead transitions. [2024-06-21 19:50:41,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 149 transitions, 1488 flow [2024-06-21 19:50:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 19:50:41,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 19:50:41,615 INFO L175 Difference]: Start difference. First operand has 166 places, 135 transitions, 1184 flow. Second operand 7 states and 180 transitions. [2024-06-21 19:50:41,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 149 transitions, 1488 flow [2024-06-21 19:50:41,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 149 transitions, 1398 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:41,668 INFO L231 Difference]: Finished difference. Result has 168 places, 135 transitions, 1190 flow [2024-06-21 19:50:41,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1190, PETRI_PLACES=168, PETRI_TRANSITIONS=135} [2024-06-21 19:50:41,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 19:50:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 135 transitions, 1190 flow [2024-06-21 19:50:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:41,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:41,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:41,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:50:41,669 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 19:50:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1079985465, now seen corresponding path program 10 times [2024-06-21 19:50:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701301621] [2024-06-21 19:50:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701301621] [2024-06-21 19:50:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701301621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:42,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:42,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104593850] [2024-06-21 19:50:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:42,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:42,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 135 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:42,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:42,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:42,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:42,654 INFO L124 PetriNetUnfolderBase]: 882/1909 cut-off events. [2024-06-21 19:50:42,654 INFO L125 PetriNetUnfolderBase]: For 17976/17980 co-relation queries the response was YES. [2024-06-21 19:50:42,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6380 conditions, 1909 events. 882/1909 cut-off events. For 17976/17980 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 14661 event pairs, 189 based on Foata normal form. 4/1884 useless extension candidates. Maximal degree in co-relation 6307. Up to 1304 conditions per place. [2024-06-21 19:50:42,667 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 120 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-06-21 19:50:42,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 152 transitions, 1530 flow [2024-06-21 19:50:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 19:50:42,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 19:50:42,669 INFO L175 Difference]: Start difference. First operand has 168 places, 135 transitions, 1190 flow. Second operand 7 states and 177 transitions. [2024-06-21 19:50:42,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 152 transitions, 1530 flow [2024-06-21 19:50:42,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 152 transitions, 1434 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:42,723 INFO L231 Difference]: Finished difference. Result has 170 places, 136 transitions, 1164 flow [2024-06-21 19:50:42,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=170, PETRI_TRANSITIONS=136} [2024-06-21 19:50:42,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 19:50:42,724 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 136 transitions, 1164 flow [2024-06-21 19:50:42,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:42,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:42,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:50:42,724 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 19:50:42,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1098930887, now seen corresponding path program 11 times [2024-06-21 19:50:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316579431] [2024-06-21 19:50:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:43,318 INFO 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 19:50:43,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:43,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316579431] [2024-06-21 19:50:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316579431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:43,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:43,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90501463] [2024-06-21 19:50:43,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:43,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:43,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 136 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:43,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:43,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:43,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:43,617 INFO L124 PetriNetUnfolderBase]: 874/1889 cut-off events. [2024-06-21 19:50:43,618 INFO L125 PetriNetUnfolderBase]: For 15004/15008 co-relation queries the response was YES. [2024-06-21 19:50:43,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6038 conditions, 1889 events. 874/1889 cut-off events. For 15004/15008 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 14498 event pairs, 154 based on Foata normal form. 4/1858 useless extension candidates. Maximal degree in co-relation 5964. Up to 902 conditions per place. [2024-06-21 19:50:43,630 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 78 selfloop transitions, 61 changer transitions 0/152 dead transitions. [2024-06-21 19:50:43,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 152 transitions, 1478 flow [2024-06-21 19:50:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 19:50:43,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 19:50:43,631 INFO L175 Difference]: Start difference. First operand has 170 places, 136 transitions, 1164 flow. Second operand 7 states and 180 transitions. [2024-06-21 19:50:43,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 152 transitions, 1478 flow [2024-06-21 19:50:43,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 152 transitions, 1395 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:43,683 INFO L231 Difference]: Finished difference. Result has 171 places, 136 transitions, 1207 flow [2024-06-21 19:50:43,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=171, PETRI_TRANSITIONS=136} [2024-06-21 19:50:43,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 19:50:43,684 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 136 transitions, 1207 flow [2024-06-21 19:50:43,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:43,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:43,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:43,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:50:43,684 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 19:50:43,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:43,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1575695034, now seen corresponding path program 1 times [2024-06-21 19:50:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:43,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198698631] [2024-06-21 19:50:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:43,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:44,246 INFO 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 19:50:44,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:44,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198698631] [2024-06-21 19:50:44,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198698631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:44,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:44,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:44,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699922326] [2024-06-21 19:50:44,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:44,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:44,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:44,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:44,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:44,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 136 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:44,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:44,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:44,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:44,649 INFO L124 PetriNetUnfolderBase]: 923/2012 cut-off events. [2024-06-21 19:50:44,650 INFO L125 PetriNetUnfolderBase]: For 19162/19166 co-relation queries the response was YES. [2024-06-21 19:50:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 2012 events. 923/2012 cut-off events. For 19162/19166 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15632 event pairs, 181 based on Foata normal form. 8/1994 useless extension candidates. Maximal degree in co-relation 6395. Up to 1145 conditions per place. [2024-06-21 19:50:44,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 119 selfloop transitions, 31 changer transitions 5/167 dead transitions. [2024-06-21 19:50:44,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 1679 flow [2024-06-21 19:50:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 19:50:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-21 19:50:44,663 INFO L175 Difference]: Start difference. First operand has 171 places, 136 transitions, 1207 flow. Second operand 8 states and 193 transitions. [2024-06-21 19:50:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 1679 flow [2024-06-21 19:50:44,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 167 transitions, 1490 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:44,713 INFO L231 Difference]: Finished difference. Result has 176 places, 140 transitions, 1188 flow [2024-06-21 19:50:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=176, PETRI_TRANSITIONS=140} [2024-06-21 19:50:44,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 19:50:44,713 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 140 transitions, 1188 flow [2024-06-21 19:50:44,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:44,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:44,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:50:44,714 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 19:50:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1696453002, now seen corresponding path program 2 times [2024-06-21 19:50:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162705822] [2024-06-21 19:50:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:45,283 INFO 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 19:50:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162705822] [2024-06-21 19:50:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162705822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021327882] [2024-06-21 19:50:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:45,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:45,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 140 transitions, 1188 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:45,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:45,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:45,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:45,668 INFO L124 PetriNetUnfolderBase]: 831/1828 cut-off events. [2024-06-21 19:50:45,668 INFO L125 PetriNetUnfolderBase]: For 17135/17139 co-relation queries the response was YES. [2024-06-21 19:50:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5543 conditions, 1828 events. 831/1828 cut-off events. For 17135/17139 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13942 event pairs, 175 based on Foata normal form. 8/1806 useless extension candidates. Maximal degree in co-relation 5467. Up to 1116 conditions per place. [2024-06-21 19:50:45,682 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 113 selfloop transitions, 30 changer transitions 5/161 dead transitions. [2024-06-21 19:50:45,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 161 transitions, 1534 flow [2024-06-21 19:50:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 19:50:45,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 19:50:45,683 INFO L175 Difference]: Start difference. First operand has 176 places, 140 transitions, 1188 flow. Second operand 7 states and 185 transitions. [2024-06-21 19:50:45,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 161 transitions, 1534 flow [2024-06-21 19:50:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 161 transitions, 1491 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:45,730 INFO L231 Difference]: Finished difference. Result has 176 places, 137 transitions, 1183 flow [2024-06-21 19:50:45,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=176, PETRI_TRANSITIONS=137} [2024-06-21 19:50:45,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 19:50:45,731 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 137 transitions, 1183 flow [2024-06-21 19:50:45,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:45,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:45,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:45,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:50:45,731 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 19:50:45,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1863291578, now seen corresponding path program 3 times [2024-06-21 19:50:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:45,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316280869] [2024-06-21 19:50:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:46,697 INFO 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 19:50:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316280869] [2024-06-21 19:50:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316280869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:46,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423512940] [2024-06-21 19:50:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:46,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:46,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:46,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 137 transitions, 1183 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:46,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:46,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:46,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:47,183 INFO L124 PetriNetUnfolderBase]: 811/1796 cut-off events. [2024-06-21 19:50:47,184 INFO L125 PetriNetUnfolderBase]: For 17259/17263 co-relation queries the response was YES. [2024-06-21 19:50:47,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5455 conditions, 1796 events. 811/1796 cut-off events. For 17259/17263 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13727 event pairs, 169 based on Foata normal form. 8/1774 useless extension candidates. Maximal degree in co-relation 5381. Up to 1020 conditions per place. [2024-06-21 19:50:47,193 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 106 selfloop transitions, 26 changer transitions 14/159 dead transitions. [2024-06-21 19:50:47,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 159 transitions, 1527 flow [2024-06-21 19:50:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 19:50:47,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 19:50:47,194 INFO L175 Difference]: Start difference. First operand has 176 places, 137 transitions, 1183 flow. Second operand 7 states and 186 transitions. [2024-06-21 19:50:47,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 159 transitions, 1527 flow [2024-06-21 19:50:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 159 transitions, 1432 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 19:50:47,247 INFO L231 Difference]: Finished difference. Result has 172 places, 127 transitions, 1027 flow [2024-06-21 19:50:47,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1027, PETRI_PLACES=172, PETRI_TRANSITIONS=127} [2024-06-21 19:50:47,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 19:50:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 127 transitions, 1027 flow [2024-06-21 19:50:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:47,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:47,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:50:47,248 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 19:50:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -707179846, now seen corresponding path program 4 times [2024-06-21 19:50:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:47,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660219913] [2024-06-21 19:50:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:48,143 INFO 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 19:50:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660219913] [2024-06-21 19:50:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660219913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:48,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495308347] [2024-06-21 19:50:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:48,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:48,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 127 transitions, 1027 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:48,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:48,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:48,591 INFO L124 PetriNetUnfolderBase]: 763/1678 cut-off events. [2024-06-21 19:50:48,592 INFO L125 PetriNetUnfolderBase]: For 23643/23647 co-relation queries the response was YES. [2024-06-21 19:50:48,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5194 conditions, 1678 events. 763/1678 cut-off events. For 23643/23647 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 12564 event pairs, 169 based on Foata normal form. 8/1660 useless extension candidates. Maximal degree in co-relation 5134. Up to 966 conditions per place. [2024-06-21 19:50:48,606 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 103 selfloop transitions, 33 changer transitions 3/152 dead transitions. [2024-06-21 19:50:48,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 152 transitions, 1447 flow [2024-06-21 19:50:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 19:50:48,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 19:50:48,607 INFO L175 Difference]: Start difference. First operand has 172 places, 127 transitions, 1027 flow. Second operand 8 states and 212 transitions. [2024-06-21 19:50:48,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 152 transitions, 1447 flow [2024-06-21 19:50:48,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 152 transitions, 1342 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 19:50:48,666 INFO L231 Difference]: Finished difference. Result has 166 places, 125 transitions, 978 flow [2024-06-21 19:50:48,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=978, PETRI_PLACES=166, PETRI_TRANSITIONS=125} [2024-06-21 19:50:48,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 19:50:48,667 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 125 transitions, 978 flow [2024-06-21 19:50:48,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:48,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:48,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:48,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:50:48,667 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 19:50:48,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1975431804, now seen corresponding path program 5 times [2024-06-21 19:50:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:48,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49169074] [2024-06-21 19:50:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:49,475 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 19:50:49,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:49,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49169074] [2024-06-21 19:50:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49169074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:49,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:49,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816087894] [2024-06-21 19:50:49,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:49,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:49,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:49,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 125 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:49,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:49,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:49,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:49,914 INFO L124 PetriNetUnfolderBase]: 719/1586 cut-off events. [2024-06-21 19:50:49,914 INFO L125 PetriNetUnfolderBase]: For 15639/15643 co-relation queries the response was YES. [2024-06-21 19:50:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1586 events. 719/1586 cut-off events. For 15639/15643 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11735 event pairs, 171 based on Foata normal form. 8/1568 useless extension candidates. Maximal degree in co-relation 4537. Up to 988 conditions per place. [2024-06-21 19:50:49,930 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 29 changer transitions 6/147 dead transitions. [2024-06-21 19:50:49,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 147 transitions, 1298 flow [2024-06-21 19:50:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 19:50:49,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-21 19:50:49,931 INFO L175 Difference]: Start difference. First operand has 166 places, 125 transitions, 978 flow. Second operand 8 states and 209 transitions. [2024-06-21 19:50:49,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 147 transitions, 1298 flow [2024-06-21 19:50:49,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 147 transitions, 1222 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 19:50:49,984 INFO L231 Difference]: Finished difference. Result has 164 places, 122 transitions, 942 flow [2024-06-21 19:50:49,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=942, PETRI_PLACES=164, PETRI_TRANSITIONS=122} [2024-06-21 19:50:49,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 19:50:49,985 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 122 transitions, 942 flow [2024-06-21 19:50:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:49,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:49,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:49,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:50:49,986 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 19:50:49,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1628779132, now seen corresponding path program 6 times [2024-06-21 19:50:49,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:49,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144713884] [2024-06-21 19:50:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:49,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:50,827 INFO 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 19:50:50,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:50,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144713884] [2024-06-21 19:50:50,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144713884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:50,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:50,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:50,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524878730] [2024-06-21 19:50:50,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:50,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:50,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:50,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 122 transitions, 942 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:50,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:50,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:50,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:51,157 INFO L124 PetriNetUnfolderBase]: 699/1544 cut-off events. [2024-06-21 19:50:51,158 INFO L125 PetriNetUnfolderBase]: For 15335/15339 co-relation queries the response was YES. [2024-06-21 19:50:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 1544 events. 699/1544 cut-off events. For 15335/15339 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11358 event pairs, 151 based on Foata normal form. 8/1530 useless extension candidates. Maximal degree in co-relation 4387. Up to 828 conditions per place. [2024-06-21 19:50:51,167 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 84 selfloop transitions, 36 changer transitions 13/146 dead transitions. [2024-06-21 19:50:51,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 146 transitions, 1264 flow [2024-06-21 19:50:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 19:50:51,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 19:50:51,168 INFO L175 Difference]: Start difference. First operand has 164 places, 122 transitions, 942 flow. Second operand 8 states and 210 transitions. [2024-06-21 19:50:51,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 146 transitions, 1264 flow [2024-06-21 19:50:51,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 146 transitions, 1188 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 19:50:51,204 INFO L231 Difference]: Finished difference. Result has 160 places, 114 transitions, 887 flow [2024-06-21 19:50:51,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=160, PETRI_TRANSITIONS=114} [2024-06-21 19:50:51,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 19:50:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 114 transitions, 887 flow [2024-06-21 19:50:51,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:51,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:51,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:51,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:50:51,206 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 19:50:51,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1947349642, now seen corresponding path program 7 times [2024-06-21 19:50:51,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:51,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654542838] [2024-06-21 19:50:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:51,919 INFO 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 19:50:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654542838] [2024-06-21 19:50:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654542838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:51,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:51,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288787487] [2024-06-21 19:50:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:51,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:51,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:51,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:51,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:51,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:51,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 114 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:51,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:51,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:51,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:52,230 INFO L124 PetriNetUnfolderBase]: 693/1498 cut-off events. [2024-06-21 19:50:52,230 INFO L125 PetriNetUnfolderBase]: For 15383/15383 co-relation queries the response was YES. [2024-06-21 19:50:52,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1498 events. 693/1498 cut-off events. For 15383/15383 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 10892 event pairs, 122 based on Foata normal form. 8/1488 useless extension candidates. Maximal degree in co-relation 4320. Up to 787 conditions per place. [2024-06-21 19:50:52,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 99 selfloop transitions, 18 changer transitions 15/144 dead transitions. [2024-06-21 19:50:52,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 144 transitions, 1249 flow [2024-06-21 19:50:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-21 19:50:52,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-21 19:50:52,240 INFO L175 Difference]: Start difference. First operand has 160 places, 114 transitions, 887 flow. Second operand 9 states and 209 transitions. [2024-06-21 19:50:52,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 144 transitions, 1249 flow [2024-06-21 19:50:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 144 transitions, 1109 flow, removed 1 selfloop flow, removed 18 redundant places. [2024-06-21 19:50:52,272 INFO L231 Difference]: Finished difference. Result has 152 places, 110 transitions, 771 flow [2024-06-21 19:50:52,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=152, PETRI_TRANSITIONS=110} [2024-06-21 19:50:52,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 19:50:52,272 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 110 transitions, 771 flow [2024-06-21 19:50:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:50:52,273 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 19:50:52,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash 985765978, now seen corresponding path program 8 times [2024-06-21 19:50:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:52,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342026245] [2024-06-21 19:50:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:52,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:53,238 INFO 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 19:50:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342026245] [2024-06-21 19:50:53,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342026245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:53,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:53,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892230109] [2024-06-21 19:50:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:53,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 19:50:53,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 110 transitions, 771 flow. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:53,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:53,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 19:50:53,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:53,562 INFO L124 PetriNetUnfolderBase]: 575/1274 cut-off events. [2024-06-21 19:50:53,562 INFO L125 PetriNetUnfolderBase]: For 14757/14757 co-relation queries the response was YES. [2024-06-21 19:50:53,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3613 conditions, 1274 events. 575/1274 cut-off events. For 14757/14757 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 9046 event pairs, 113 based on Foata normal form. 8/1258 useless extension candidates. Maximal degree in co-relation 3562. Up to 735 conditions per place. [2024-06-21 19:50:53,568 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 18 changer transitions 11/131 dead transitions. [2024-06-21 19:50:53,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 131 transitions, 1059 flow [2024-06-21 19:50:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-21 19:50:53,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-21 19:50:53,569 INFO L175 Difference]: Start difference. First operand has 152 places, 110 transitions, 771 flow. Second operand 9 states and 212 transitions. [2024-06-21 19:50:53,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 131 transitions, 1059 flow [2024-06-21 19:50:53,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 131 transitions, 1012 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:53,598 INFO L231 Difference]: Finished difference. Result has 151 places, 106 transitions, 732 flow [2024-06-21 19:50:53,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=732, PETRI_PLACES=151, PETRI_TRANSITIONS=106} [2024-06-21 19:50:53,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 19:50:53,598 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 106 transitions, 732 flow [2024-06-21 19:50:53,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:53,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:53,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:50:53,599 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 19:50:53,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:53,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1666239848, now seen corresponding path program 9 times [2024-06-21 19:50:53,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:53,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120560277] [2024-06-21 19:50:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:54,182 INFO 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 19:50:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:54,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120560277] [2024-06-21 19:50:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120560277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300844369] [2024-06-21 19:50:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:54,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:54,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:54,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:54,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 106 transitions, 732 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:54,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:54,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:54,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:54,454 INFO L124 PetriNetUnfolderBase]: 579/1296 cut-off events. [2024-06-21 19:50:54,454 INFO L125 PetriNetUnfolderBase]: For 20592/20592 co-relation queries the response was YES. [2024-06-21 19:50:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 1296 events. 579/1296 cut-off events. For 20592/20592 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9258 event pairs, 115 based on Foata normal form. 8/1282 useless extension candidates. Maximal degree in co-relation 3842. Up to 675 conditions per place. [2024-06-21 19:50:54,461 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 91 selfloop transitions, 9 changer transitions 16/129 dead transitions. [2024-06-21 19:50:54,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 129 transitions, 1098 flow [2024-06-21 19:50:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 19:50:54,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 19:50:54,462 INFO L175 Difference]: Start difference. First operand has 151 places, 106 transitions, 732 flow. Second operand 8 states and 202 transitions. [2024-06-21 19:50:54,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 129 transitions, 1098 flow [2024-06-21 19:50:54,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 129 transitions, 1054 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:54,507 INFO L231 Difference]: Finished difference. Result has 148 places, 95 transitions, 613 flow [2024-06-21 19:50:54,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=148, PETRI_TRANSITIONS=95} [2024-06-21 19:50:54,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 19:50:54,507 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 95 transitions, 613 flow [2024-06-21 19:50:54,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:54,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:54,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:54,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:50:54,508 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 19:50:54,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1042533670, now seen corresponding path program 10 times [2024-06-21 19:50:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:54,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692304824] [2024-06-21 19:50:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692304824] [2024-06-21 19:50:55,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692304824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:55,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:55,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:55,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311768495] [2024-06-21 19:50:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:55,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:55,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:55,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 95 transitions, 613 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:55,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:55,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:55,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:55,464 INFO L124 PetriNetUnfolderBase]: 490/1079 cut-off events. [2024-06-21 19:50:55,464 INFO L125 PetriNetUnfolderBase]: For 13133/13133 co-relation queries the response was YES. [2024-06-21 19:50:55,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1079 events. 490/1079 cut-off events. For 13133/13133 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7327 event pairs, 108 based on Foata normal form. 8/1066 useless extension candidates. Maximal degree in co-relation 2935. Up to 675 conditions per place. [2024-06-21 19:50:55,469 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 79 selfloop transitions, 10 changer transitions 15/116 dead transitions. [2024-06-21 19:50:55,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 116 transitions, 873 flow [2024-06-21 19:50:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 19:50:55,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 19:50:55,470 INFO L175 Difference]: Start difference. First operand has 148 places, 95 transitions, 613 flow. Second operand 10 states and 220 transitions. [2024-06-21 19:50:55,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 116 transitions, 873 flow [2024-06-21 19:50:55,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 116 transitions, 829 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 19:50:55,494 INFO L231 Difference]: Finished difference. Result has 137 places, 92 transitions, 572 flow [2024-06-21 19:50:55,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=572, PETRI_PLACES=137, PETRI_TRANSITIONS=92} [2024-06-21 19:50:55,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 19:50:55,494 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 92 transitions, 572 flow [2024-06-21 19:50:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:55,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:55,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:55,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:50:55,495 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 19:50:55,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash -414552552, now seen corresponding path program 11 times [2024-06-21 19:50:55,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:55,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153026868] [2024-06-21 19:50:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:56,200 INFO 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 19:50:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153026868] [2024-06-21 19:50:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153026868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:56,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:56,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:56,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886337546] [2024-06-21 19:50:56,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:56,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:56,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:56,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 92 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:56,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:56,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:56,525 INFO L124 PetriNetUnfolderBase]: 468/1023 cut-off events. [2024-06-21 19:50:56,525 INFO L125 PetriNetUnfolderBase]: For 11742/11742 co-relation queries the response was YES. [2024-06-21 19:50:56,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1023 events. 468/1023 cut-off events. For 11742/11742 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6729 event pairs, 114 based on Foata normal form. 8/1010 useless extension candidates. Maximal degree in co-relation 2733. Up to 650 conditions per place. [2024-06-21 19:50:56,529 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 17 changer transitions 4/113 dead transitions. [2024-06-21 19:50:56,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 113 transitions, 834 flow [2024-06-21 19:50:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 19:50:56,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 19:50:56,530 INFO L175 Difference]: Start difference. First operand has 137 places, 92 transitions, 572 flow. Second operand 10 states and 220 transitions. [2024-06-21 19:50:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 113 transitions, 834 flow [2024-06-21 19:50:56,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 113 transitions, 802 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 19:50:56,545 INFO L231 Difference]: Finished difference. Result has 132 places, 93 transitions, 593 flow [2024-06-21 19:50:56,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=593, PETRI_PLACES=132, PETRI_TRANSITIONS=93} [2024-06-21 19:50:56,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:50:56,546 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 93 transitions, 593 flow [2024-06-21 19:50:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:56,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:56,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:56,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:50:56,546 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 19:50:56,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1265964728, now seen corresponding path program 12 times [2024-06-21 19:50:56,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:56,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738534903] [2024-06-21 19:50:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:57,248 INFO 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 19:50:57,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738534903] [2024-06-21 19:50:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738534903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:57,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:57,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277412686] [2024-06-21 19:50:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:57,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:57,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:57,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 19:50:57,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 93 transitions, 593 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:57,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:57,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 19:50:57,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:57,523 INFO L124 PetriNetUnfolderBase]: 464/1023 cut-off events. [2024-06-21 19:50:57,524 INFO L125 PetriNetUnfolderBase]: For 10606/10606 co-relation queries the response was YES. [2024-06-21 19:50:57,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 1023 events. 464/1023 cut-off events. For 10606/10606 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6806 event pairs, 122 based on Foata normal form. 8/1014 useless extension candidates. Maximal degree in co-relation 2755. Up to 624 conditions per place. [2024-06-21 19:50:57,528 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 15 changer transitions 11/114 dead transitions. [2024-06-21 19:50:57,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 114 transitions, 847 flow [2024-06-21 19:50:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 19:50:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-21 19:50:57,529 INFO L175 Difference]: Start difference. First operand has 132 places, 93 transitions, 593 flow. Second operand 9 states and 205 transitions. [2024-06-21 19:50:57,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 114 transitions, 847 flow [2024-06-21 19:50:57,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 114 transitions, 814 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:57,542 INFO L231 Difference]: Finished difference. Result has 132 places, 89 transitions, 569 flow [2024-06-21 19:50:57,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=569, PETRI_PLACES=132, PETRI_TRANSITIONS=89} [2024-06-21 19:50:57,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:50:57,543 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 89 transitions, 569 flow [2024-06-21 19:50:57,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:57,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:57,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:57,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:50:57,544 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 19:50:57,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -657791458, now seen corresponding path program 13 times [2024-06-21 19:50:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516243900] [2024-06-21 19:50:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:58,326 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 19:50:58,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:58,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516243900] [2024-06-21 19:50:58,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516243900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:58,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:58,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:58,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034715279] [2024-06-21 19:50:58,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:58,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:58,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:58,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 89 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:58,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:58,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:58,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:58,557 INFO L124 PetriNetUnfolderBase]: 433/942 cut-off events. [2024-06-21 19:50:58,557 INFO L125 PetriNetUnfolderBase]: For 10134/10134 co-relation queries the response was YES. [2024-06-21 19:50:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 942 events. 433/942 cut-off events. For 10134/10134 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6161 event pairs, 118 based on Foata normal form. 8/931 useless extension candidates. Maximal degree in co-relation 2579. Up to 601 conditions per place. [2024-06-21 19:50:58,562 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 14 changer transitions 10/105 dead transitions. [2024-06-21 19:50:58,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 105 transitions, 787 flow [2024-06-21 19:50:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 19:50:58,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 19:50:58,563 INFO L175 Difference]: Start difference. First operand has 132 places, 89 transitions, 569 flow. Second operand 8 states and 196 transitions. [2024-06-21 19:50:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 105 transitions, 787 flow [2024-06-21 19:50:58,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 105 transitions, 753 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:58,577 INFO L231 Difference]: Finished difference. Result has 129 places, 86 transitions, 545 flow [2024-06-21 19:50:58,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=545, PETRI_PLACES=129, PETRI_TRANSITIONS=86} [2024-06-21 19:50:58,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 19:50:58,577 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 86 transitions, 545 flow [2024-06-21 19:50:58,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:58,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:58,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:58,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:50:58,578 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 19:50:58,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2052527458, now seen corresponding path program 14 times [2024-06-21 19:50:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:58,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472962793] [2024-06-21 19:50:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:58,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:59,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:59,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472962793] [2024-06-21 19:50:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472962793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:59,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628079642] [2024-06-21 19:50:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:59,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:50:59,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 86 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:59,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:59,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:50:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:59,486 INFO L124 PetriNetUnfolderBase]: 441/980 cut-off events. [2024-06-21 19:50:59,487 INFO L125 PetriNetUnfolderBase]: For 13078/13078 co-relation queries the response was YES. [2024-06-21 19:50:59,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2891 conditions, 980 events. 441/980 cut-off events. For 13078/13078 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6534 event pairs, 114 based on Foata normal form. 8/970 useless extension candidates. Maximal degree in co-relation 2847. Up to 545 conditions per place. [2024-06-21 19:50:59,492 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 10 changer transitions 10/104 dead transitions. [2024-06-21 19:50:59,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 104 transitions, 829 flow [2024-06-21 19:50:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 19:50:59,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-21 19:50:59,493 INFO L175 Difference]: Start difference. First operand has 129 places, 86 transitions, 545 flow. Second operand 8 states and 197 transitions. [2024-06-21 19:50:59,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 104 transitions, 829 flow [2024-06-21 19:50:59,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 104 transitions, 793 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:59,514 INFO L231 Difference]: Finished difference. Result has 127 places, 80 transitions, 487 flow [2024-06-21 19:50:59,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=127, PETRI_TRANSITIONS=80} [2024-06-21 19:50:59,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 19:50:59,514 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 80 transitions, 487 flow [2024-06-21 19:50:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:59,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:59,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:59,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:50:59,515 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 19:50:59,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 624236300, now seen corresponding path program 15 times [2024-06-21 19:50:59,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:59,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664196568] [2024-06-21 19:50:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:00,265 INFO 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 19:51:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664196568] [2024-06-21 19:51:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664196568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:00,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:00,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149312316] [2024-06-21 19:51:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:00,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 19:51:00,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 80 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:00,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:00,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 19:51:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:00,487 INFO L124 PetriNetUnfolderBase]: 405/902 cut-off events. [2024-06-21 19:51:00,487 INFO L125 PetriNetUnfolderBase]: For 12281/12281 co-relation queries the response was YES. [2024-06-21 19:51:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 902 events. 405/902 cut-off events. For 12281/12281 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5870 event pairs, 136 based on Foata normal form. 8/887 useless extension candidates. Maximal degree in co-relation 2608. Up to 521 conditions per place. [2024-06-21 19:51:00,491 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 68 selfloop transitions, 11 changer transitions 6/97 dead transitions. [2024-06-21 19:51:00,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 97 transitions, 755 flow [2024-06-21 19:51:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 19:51:00,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 19:51:00,493 INFO L175 Difference]: Start difference. First operand has 127 places, 80 transitions, 487 flow. Second operand 9 states and 207 transitions. [2024-06-21 19:51:00,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 97 transitions, 755 flow [2024-06-21 19:51:00,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 97 transitions, 724 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:00,515 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 476 flow [2024-06-21 19:51:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-21 19:51:00,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:51:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 476 flow [2024-06-21 19:51:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.77777777777778) internal successors, (178), 9 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:00,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:51:00,516 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 19:51:00,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1033718618, now seen corresponding path program 16 times [2024-06-21 19:51:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648581338] [2024-06-21 19:51:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:01,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:01,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648581338] [2024-06-21 19:51:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648581338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:01,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:01,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:01,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159421187] [2024-06-21 19:51:01,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:01,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:01,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:01,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:01,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:01,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:01,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:01,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:01,362 INFO L124 PetriNetUnfolderBase]: 361/814 cut-off events. [2024-06-21 19:51:01,362 INFO L125 PetriNetUnfolderBase]: For 7354/7354 co-relation queries the response was YES. [2024-06-21 19:51:01,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 814 events. 361/814 cut-off events. For 7354/7354 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5233 event pairs, 108 based on Foata normal form. 8/799 useless extension candidates. Maximal degree in co-relation 2168. Up to 521 conditions per place. [2024-06-21 19:51:01,366 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 59 selfloop transitions, 7 changer transitions 13/92 dead transitions. [2024-06-21 19:51:01,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 92 transitions, 664 flow [2024-06-21 19:51:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 19:51:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 19:51:01,368 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 476 flow. Second operand 8 states and 192 transitions. [2024-06-21 19:51:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 92 transitions, 664 flow [2024-06-21 19:51:01,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 92 transitions, 639 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:01,379 INFO L231 Difference]: Finished difference. Result has 121 places, 74 transitions, 439 flow [2024-06-21 19:51:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=121, PETRI_TRANSITIONS=74} [2024-06-21 19:51:01,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 19:51:01,379 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 74 transitions, 439 flow [2024-06-21 19:51:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:01,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:01,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:51:01,380 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 19:51:01,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1673772266, now seen corresponding path program 17 times [2024-06-21 19:51:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400380119] [2024-06-21 19:51:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:01,966 INFO 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 19:51:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400380119] [2024-06-21 19:51:01,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400380119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:01,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:01,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228424972] [2024-06-21 19:51:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:02,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:02,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 74 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:02,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:02,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:02,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:02,194 INFO L124 PetriNetUnfolderBase]: 369/846 cut-off events. [2024-06-21 19:51:02,194 INFO L125 PetriNetUnfolderBase]: For 10002/10002 co-relation queries the response was YES. [2024-06-21 19:51:02,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2427 conditions, 846 events. 369/846 cut-off events. For 10002/10002 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5566 event pairs, 104 based on Foata normal form. 8/831 useless extension candidates. Maximal degree in co-relation 2387. Up to 433 conditions per place. [2024-06-21 19:51:02,198 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 62 selfloop transitions, 8 changer transitions 8/91 dead transitions. [2024-06-21 19:51:02,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 91 transitions, 687 flow [2024-06-21 19:51:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 19:51:02,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-21 19:51:02,199 INFO L175 Difference]: Start difference. First operand has 121 places, 74 transitions, 439 flow. Second operand 8 states and 195 transitions. [2024-06-21 19:51:02,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 91 transitions, 687 flow [2024-06-21 19:51:02,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 91 transitions, 661 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:02,215 INFO L231 Difference]: Finished difference. Result has 115 places, 70 transitions, 405 flow [2024-06-21 19:51:02,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=405, PETRI_PLACES=115, PETRI_TRANSITIONS=70} [2024-06-21 19:51:02,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 19:51:02,215 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 70 transitions, 405 flow [2024-06-21 19:51:02,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:02,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:02,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:02,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:51:02,216 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 19:51:02,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash -709464714, now seen corresponding path program 18 times [2024-06-21 19:51:02,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:02,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006860850] [2024-06-21 19:51:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:02,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:02,888 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 19:51:02,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:02,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006860850] [2024-06-21 19:51:02,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006860850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:02,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819049986] [2024-06-21 19:51:02,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:02,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:02,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:02,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 70 transitions, 405 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:02,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:02,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:03,114 INFO L124 PetriNetUnfolderBase]: 309/714 cut-off events. [2024-06-21 19:51:03,114 INFO L125 PetriNetUnfolderBase]: For 5924/5924 co-relation queries the response was YES. [2024-06-21 19:51:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 714 events. 309/714 cut-off events. For 5924/5924 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4408 event pairs, 96 based on Foata normal form. 8/703 useless extension candidates. Maximal degree in co-relation 1863. Up to 433 conditions per place. [2024-06-21 19:51:03,117 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 47 selfloop transitions, 2 changer transitions 22/84 dead transitions. [2024-06-21 19:51:03,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 84 transitions, 577 flow [2024-06-21 19:51:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 19:51:03,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-21 19:51:03,118 INFO L175 Difference]: Start difference. First operand has 115 places, 70 transitions, 405 flow. Second operand 8 states and 191 transitions. [2024-06-21 19:51:03,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 84 transitions, 577 flow [2024-06-21 19:51:03,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 84 transitions, 558 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:03,126 INFO L231 Difference]: Finished difference. Result has 113 places, 61 transitions, 322 flow [2024-06-21 19:51:03,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=322, PETRI_PLACES=113, PETRI_TRANSITIONS=61} [2024-06-21 19:51:03,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 19:51:03,127 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 61 transitions, 322 flow [2024-06-21 19:51:03,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:03,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:03,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:51:03,127 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 19:51:03,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1790657182, now seen corresponding path program 19 times [2024-06-21 19:51:03,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:03,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37041448] [2024-06-21 19:51:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37041448] [2024-06-21 19:51:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37041448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:04,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638352223] [2024-06-21 19:51:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:04,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:04,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 61 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:04,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:04,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:04,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:04,294 INFO L124 PetriNetUnfolderBase]: 308/683 cut-off events. [2024-06-21 19:51:04,295 INFO L125 PetriNetUnfolderBase]: For 7854/7854 co-relation queries the response was YES. [2024-06-21 19:51:04,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 683 events. 308/683 cut-off events. For 7854/7854 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4190 event pairs, 78 based on Foata normal form. 8/683 useless extension candidates. Maximal degree in co-relation 1920. Up to 313 conditions per place. [2024-06-21 19:51:04,298 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 48 selfloop transitions, 15 changer transitions 6/82 dead transitions. [2024-06-21 19:51:04,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 82 transitions, 552 flow [2024-06-21 19:51:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 19:51:04,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-21 19:51:04,299 INFO L175 Difference]: Start difference. First operand has 113 places, 61 transitions, 322 flow. Second operand 9 states and 220 transitions. [2024-06-21 19:51:04,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 82 transitions, 552 flow [2024-06-21 19:51:04,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 82 transitions, 522 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:51:04,306 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 322 flow [2024-06-21 19:51:04,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=322, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2024-06-21 19:51:04,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 19:51:04,306 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 322 flow [2024-06-21 19:51:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:04,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:04,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:04,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:51:04,307 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 19:51:04,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash 677844666, now seen corresponding path program 20 times [2024-06-21 19:51:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089643112] [2024-06-21 19:51:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:04,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:04,929 INFO 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 19:51:04,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:04,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089643112] [2024-06-21 19:51:04,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089643112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:04,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:04,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:04,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81527418] [2024-06-21 19:51:04,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:04,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:04,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:04,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:04,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:04,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:04,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:05,148 INFO L124 PetriNetUnfolderBase]: 292/641 cut-off events. [2024-06-21 19:51:05,148 INFO L125 PetriNetUnfolderBase]: For 5803/5803 co-relation queries the response was YES. [2024-06-21 19:51:05,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1855 conditions, 641 events. 292/641 cut-off events. For 5803/5803 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3804 event pairs, 98 based on Foata normal form. 8/641 useless extension candidates. Maximal degree in co-relation 1823. Up to 373 conditions per place. [2024-06-21 19:51:05,151 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 40 selfloop transitions, 12 changer transitions 10/75 dead transitions. [2024-06-21 19:51:05,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 75 transitions, 478 flow [2024-06-21 19:51:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 19:51:05,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-21 19:51:05,151 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 322 flow. Second operand 8 states and 195 transitions. [2024-06-21 19:51:05,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 75 transitions, 478 flow [2024-06-21 19:51:05,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 75 transitions, 446 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:05,156 INFO L231 Difference]: Finished difference. Result has 98 places, 56 transitions, 299 flow [2024-06-21 19:51:05,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=299, PETRI_PLACES=98, PETRI_TRANSITIONS=56} [2024-06-21 19:51:05,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 19:51:05,157 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 56 transitions, 299 flow [2024-06-21 19:51:05,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:05,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:05,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:05,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:51:05,157 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 19:51:05,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash -222916996, now seen corresponding path program 21 times [2024-06-21 19:51:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118379802] [2024-06-21 19:51:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118379802] [2024-06-21 19:51:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118379802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:05,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:05,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885546457] [2024-06-21 19:51:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:05,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:05,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 56 transitions, 299 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:05,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:05,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:05,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:05,985 INFO L124 PetriNetUnfolderBase]: 330/751 cut-off events. [2024-06-21 19:51:05,985 INFO L125 PetriNetUnfolderBase]: For 8370/8370 co-relation queries the response was YES. [2024-06-21 19:51:05,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2316 conditions, 751 events. 330/751 cut-off events. For 8370/8370 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5025 event pairs, 66 based on Foata normal form. 8/747 useless extension candidates. Maximal degree in co-relation 2285. Up to 203 conditions per place. [2024-06-21 19:51:05,987 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 44 selfloop transitions, 13 changer transitions 6/76 dead transitions. [2024-06-21 19:51:05,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 76 transitions, 545 flow [2024-06-21 19:51:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 19:51:05,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-21 19:51:05,988 INFO L175 Difference]: Start difference. First operand has 98 places, 56 transitions, 299 flow. Second operand 8 states and 199 transitions. [2024-06-21 19:51:05,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 76 transitions, 545 flow [2024-06-21 19:51:05,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 503 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:05,995 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 285 flow [2024-06-21 19:51:05,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2024-06-21 19:51:05,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 19:51:05,996 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 285 flow [2024-06-21 19:51:05,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:05,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:05,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:05,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:51:05,997 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 19:51:05,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1531682402, now seen corresponding path program 22 times [2024-06-21 19:51:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:05,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76706409] [2024-06-21 19:51:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:05,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:06,783 INFO 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 19:51:06,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76706409] [2024-06-21 19:51:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76706409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:06,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:06,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:06,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119981850] [2024-06-21 19:51:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:06,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:06,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:06,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:06,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:06,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 285 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:06,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:06,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:06,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:07,079 INFO L124 PetriNetUnfolderBase]: 342/789 cut-off events. [2024-06-21 19:51:07,080 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-21 19:51:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 789 events. 342/789 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5410 event pairs, 142 based on Foata normal form. 8/771 useless extension candidates. Maximal degree in co-relation 2427. Up to 446 conditions per place. [2024-06-21 19:51:07,083 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 8 changer transitions 6/70 dead transitions. [2024-06-21 19:51:07,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 70 transitions, 467 flow [2024-06-21 19:51:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 19:51:07,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-21 19:51:07,084 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 285 flow. Second operand 8 states and 195 transitions. [2024-06-21 19:51:07,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 70 transitions, 467 flow [2024-06-21 19:51:07,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 70 transitions, 435 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:07,090 INFO L231 Difference]: Finished difference. Result has 93 places, 52 transitions, 262 flow [2024-06-21 19:51:07,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=93, PETRI_TRANSITIONS=52} [2024-06-21 19:51:07,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 19:51:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 52 transitions, 262 flow [2024-06-21 19:51:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:07,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:07,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:07,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:51:07,091 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 19:51:07,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash -847481894, now seen corresponding path program 23 times [2024-06-21 19:51:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:07,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879148319] [2024-06-21 19:51:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:07,731 INFO 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 19:51:07,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:07,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879148319] [2024-06-21 19:51:07,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879148319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:07,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:07,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:07,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586886298] [2024-06-21 19:51:07,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:07,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:07,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:07,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:07,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:07,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:07,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 52 transitions, 262 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:07,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:07,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:07,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:07,927 INFO L124 PetriNetUnfolderBase]: 298/693 cut-off events. [2024-06-21 19:51:07,927 INFO L125 PetriNetUnfolderBase]: For 6062/6062 co-relation queries the response was YES. [2024-06-21 19:51:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 693 events. 298/693 cut-off events. For 6062/6062 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4583 event pairs, 58 based on Foata normal form. 8/689 useless extension candidates. Maximal degree in co-relation 2035. Up to 203 conditions per place. [2024-06-21 19:51:07,929 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 42 selfloop transitions, 10 changer transitions 7/72 dead transitions. [2024-06-21 19:51:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 72 transitions, 488 flow [2024-06-21 19:51:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 19:51:07,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 19:51:07,930 INFO L175 Difference]: Start difference. First operand has 93 places, 52 transitions, 262 flow. Second operand 8 states and 198 transitions. [2024-06-21 19:51:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 72 transitions, 488 flow [2024-06-21 19:51:07,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 72 transitions, 458 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:07,938 INFO L231 Difference]: Finished difference. Result has 92 places, 49 transitions, 239 flow [2024-06-21 19:51:07,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=239, PETRI_PLACES=92, PETRI_TRANSITIONS=49} [2024-06-21 19:51:07,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 19:51:07,939 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 49 transitions, 239 flow [2024-06-21 19:51:07,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:07,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:07,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:07,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:51:07,940 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 19:51:07,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash 472976440, now seen corresponding path program 24 times [2024-06-21 19:51:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:07,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027889255] [2024-06-21 19:51:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:07,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027889255] [2024-06-21 19:51:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027889255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:08,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841505567] [2024-06-21 19:51:08,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:08,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:08,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:08,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 49 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:08,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:08,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:08,718 INFO L124 PetriNetUnfolderBase]: 252/579 cut-off events. [2024-06-21 19:51:08,718 INFO L125 PetriNetUnfolderBase]: For 4906/4906 co-relation queries the response was YES. [2024-06-21 19:51:08,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 579 events. 252/579 cut-off events. For 4906/4906 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3593 event pairs, 110 based on Foata normal form. 8/569 useless extension candidates. Maximal degree in co-relation 1677. Up to 364 conditions per place. [2024-06-21 19:51:08,721 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 6 changer transitions 12/62 dead transitions. [2024-06-21 19:51:08,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 62 transitions, 363 flow [2024-06-21 19:51:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 19:51:08,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-21 19:51:08,722 INFO L175 Difference]: Start difference. First operand has 92 places, 49 transitions, 239 flow. Second operand 8 states and 191 transitions. [2024-06-21 19:51:08,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 62 transitions, 363 flow [2024-06-21 19:51:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 62 transitions, 333 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 19:51:08,727 INFO L231 Difference]: Finished difference. Result has 87 places, 46 transitions, 206 flow [2024-06-21 19:51:08,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=87, PETRI_TRANSITIONS=46} [2024-06-21 19:51:08,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 19:51:08,727 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 46 transitions, 206 flow [2024-06-21 19:51:08,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:08,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:51:08,728 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 19:51:08,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1402217416, now seen corresponding path program 25 times [2024-06-21 19:51:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:08,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125066559] [2024-06-21 19:51:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:09,323 INFO 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 19:51:09,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:09,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125066559] [2024-06-21 19:51:09,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125066559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:09,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:09,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:09,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261875476] [2024-06-21 19:51:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:09,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:09,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:09,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 46 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:09,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:09,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:09,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:09,485 INFO L124 PetriNetUnfolderBase]: 204/465 cut-off events. [2024-06-21 19:51:09,485 INFO L125 PetriNetUnfolderBase]: For 2912/2912 co-relation queries the response was YES. [2024-06-21 19:51:09,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 465 events. 204/465 cut-off events. For 2912/2912 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2596 event pairs, 88 based on Foata normal form. 8/466 useless extension candidates. Maximal degree in co-relation 1251. Up to 203 conditions per place. [2024-06-21 19:51:09,487 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 7 changer transitions 6/62 dead transitions. [2024-06-21 19:51:09,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 62 transitions, 366 flow [2024-06-21 19:51:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 19:51:09,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-21 19:51:09,488 INFO L175 Difference]: Start difference. First operand has 87 places, 46 transitions, 206 flow. Second operand 8 states and 193 transitions. [2024-06-21 19:51:09,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 62 transitions, 366 flow [2024-06-21 19:51:09,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 62 transitions, 342 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:09,490 INFO L231 Difference]: Finished difference. Result has 82 places, 44 transitions, 193 flow [2024-06-21 19:51:09,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=193, PETRI_PLACES=82, PETRI_TRANSITIONS=44} [2024-06-21 19:51:09,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 19:51:09,491 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 44 transitions, 193 flow [2024-06-21 19:51:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:09,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:09,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:51:09,491 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 19:51:09,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 126323768, now seen corresponding path program 26 times [2024-06-21 19:51:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621216102] [2024-06-21 19:51:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:10,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621216102] [2024-06-21 19:51:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621216102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:10,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:10,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:10,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999152467] [2024-06-21 19:51:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:10,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:10,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:10,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:10,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 44 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:10,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:10,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:10,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:10,410 INFO L124 PetriNetUnfolderBase]: 188/451 cut-off events. [2024-06-21 19:51:10,410 INFO L125 PetriNetUnfolderBase]: For 2188/2188 co-relation queries the response was YES. [2024-06-21 19:51:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 451 events. 188/451 cut-off events. For 2188/2188 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2634 event pairs, 84 based on Foata normal form. 8/443 useless extension candidates. Maximal degree in co-relation 1165. Up to 244 conditions per place. [2024-06-21 19:51:10,412 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 25 selfloop transitions, 4 changer transitions 16/58 dead transitions. [2024-06-21 19:51:10,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 58 transitions, 311 flow [2024-06-21 19:51:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 19:51:10,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-21 19:51:10,412 INFO L175 Difference]: Start difference. First operand has 82 places, 44 transitions, 193 flow. Second operand 8 states and 191 transitions. [2024-06-21 19:51:10,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 58 transitions, 311 flow [2024-06-21 19:51:10,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 58 transitions, 294 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:10,415 INFO L231 Difference]: Finished difference. Result has 80 places, 40 transitions, 166 flow [2024-06-21 19:51:10,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=40} [2024-06-21 19:51:10,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 19:51:10,415 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 40 transitions, 166 flow [2024-06-21 19:51:10,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:10,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:10,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:51:10,416 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 19:51:10,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1121446968, now seen corresponding path program 27 times [2024-06-21 19:51:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:10,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980159655] [2024-06-21 19:51:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980159655] [2024-06-21 19:51:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980159655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:11,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006908082] [2024-06-21 19:51:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:11,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:11,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:11,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 40 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:11,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:11,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:11,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:11,272 INFO L124 PetriNetUnfolderBase]: 130/315 cut-off events. [2024-06-21 19:51:11,272 INFO L125 PetriNetUnfolderBase]: For 1272/1272 co-relation queries the response was YES. [2024-06-21 19:51:11,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 315 events. 130/315 cut-off events. For 1272/1272 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1586 event pairs, 54 based on Foata normal form. 8/311 useless extension candidates. Maximal degree in co-relation 775. Up to 159 conditions per place. [2024-06-21 19:51:11,273 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 22 selfloop transitions, 3 changer transitions 14/52 dead transitions. [2024-06-21 19:51:11,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 52 transitions, 268 flow [2024-06-21 19:51:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 19:51:11,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-21 19:51:11,274 INFO L175 Difference]: Start difference. First operand has 80 places, 40 transitions, 166 flow. Second operand 8 states and 187 transitions. [2024-06-21 19:51:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 52 transitions, 268 flow [2024-06-21 19:51:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:51:11,276 INFO L231 Difference]: Finished difference. Result has 76 places, 36 transitions, 138 flow [2024-06-21 19:51:11,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=138, PETRI_PLACES=76, PETRI_TRANSITIONS=36} [2024-06-21 19:51:11,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 19:51:11,276 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 36 transitions, 138 flow [2024-06-21 19:51:11,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:11,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:11,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:51:11,277 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 19:51:11,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash -142576004, now seen corresponding path program 28 times [2024-06-21 19:51:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:11,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071125405] [2024-06-21 19:51:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:12,123 INFO 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 19:51:12,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071125405] [2024-06-21 19:51:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071125405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:12,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:12,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245896713] [2024-06-21 19:51:12,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:12,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:12,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:12,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:12,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 36 transitions, 138 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:12,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:12,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:12,293 INFO L124 PetriNetUnfolderBase]: 139/336 cut-off events. [2024-06-21 19:51:12,293 INFO L125 PetriNetUnfolderBase]: For 1550/1550 co-relation queries the response was YES. [2024-06-21 19:51:12,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 336 events. 139/336 cut-off events. For 1550/1550 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1724 event pairs, 28 based on Foata normal form. 8/336 useless extension candidates. Maximal degree in co-relation 853. Up to 104 conditions per place. [2024-06-21 19:51:12,294 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 25 selfloop transitions, 6 changer transitions 6/50 dead transitions. [2024-06-21 19:51:12,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 50 transitions, 262 flow [2024-06-21 19:51:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-21 19:51:12,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-21 19:51:12,295 INFO L175 Difference]: Start difference. First operand has 76 places, 36 transitions, 138 flow. Second operand 8 states and 187 transitions. [2024-06-21 19:51:12,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 50 transitions, 262 flow [2024-06-21 19:51:12,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 50 transitions, 238 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:12,296 INFO L231 Difference]: Finished difference. Result has 67 places, 34 transitions, 126 flow [2024-06-21 19:51:12,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=67, PETRI_TRANSITIONS=34} [2024-06-21 19:51:12,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 19:51:12,297 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 34 transitions, 126 flow [2024-06-21 19:51:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:12,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:12,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:12,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:51:12,297 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 19:51:12,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash 142761016, now seen corresponding path program 29 times [2024-06-21 19:51:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861466055] [2024-06-21 19:51:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:12,987 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 19:51:12,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861466055] [2024-06-21 19:51:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861466055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:12,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:12,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105347488] [2024-06-21 19:51:12,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:12,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:13,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:13,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 34 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:13,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:13,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:13,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:13,176 INFO L124 PetriNetUnfolderBase]: 95/244 cut-off events. [2024-06-21 19:51:13,177 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2024-06-21 19:51:13,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 244 events. 95/244 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1101 event pairs, 8 based on Foata normal form. 8/248 useless extension candidates. Maximal degree in co-relation 575. Up to 76 conditions per place. [2024-06-21 19:51:13,177 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 21 selfloop transitions, 5 changer transitions 7/46 dead transitions. [2024-06-21 19:51:13,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 46 transitions, 216 flow [2024-06-21 19:51:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-21 19:51:13,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 19:51:13,178 INFO L175 Difference]: Start difference. First operand has 67 places, 34 transitions, 126 flow. Second operand 8 states and 184 transitions. [2024-06-21 19:51:13,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 46 transitions, 216 flow [2024-06-21 19:51:13,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 46 transitions, 201 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:13,179 INFO L231 Difference]: Finished difference. Result has 66 places, 31 transitions, 106 flow [2024-06-21 19:51:13,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=106, PETRI_PLACES=66, PETRI_TRANSITIONS=31} [2024-06-21 19:51:13,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 19:51:13,180 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 31 transitions, 106 flow [2024-06-21 19:51:13,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:13,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:13,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:51:13,180 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 19:51:13,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -763594822, now seen corresponding path program 30 times [2024-06-21 19:51:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:13,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727241080] [2024-06-21 19:51:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:13,838 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 19:51:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727241080] [2024-06-21 19:51:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727241080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:13,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261687171] [2024-06-21 19:51:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:13,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:13,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-06-21 19:51:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 31 transitions, 106 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-06-21 19:51:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:13,995 INFO L124 PetriNetUnfolderBase]: 47/132 cut-off events. [2024-06-21 19:51:13,995 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2024-06-21 19:51:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 132 events. 47/132 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 425 event pairs, 0 based on Foata normal form. 8/140 useless extension candidates. Maximal degree in co-relation 287. Up to 40 conditions per place. [2024-06-21 19:51:13,995 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-21 19:51:13,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 40 transitions, 164 flow [2024-06-21 19:51:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 19:51:13,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:51:13,996 INFO L175 Difference]: Start difference. First operand has 66 places, 31 transitions, 106 flow. Second operand 8 states and 180 transitions. [2024-06-21 19:51:13,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 40 transitions, 164 flow [2024-06-21 19:51:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 40 transitions, 145 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 19:51:13,997 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2024-06-21 19:51:13,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2024-06-21 19:51:13,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 19:51:13,997 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2024-06-21 19:51:13,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:13,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-21 19:51:14,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-21 19:51:14,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-21 19:51:14,000 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-21 19:51:14,001 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-21 19:51:14,001 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-21 19:51:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:51:14,001 INFO L445 BasicCegarLoop]: Path program histogram: [30, 12, 11, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1] [2024-06-21 19:51:14,004 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 19:51:14,004 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 19:51:14,012 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-21 19:51:14,012 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-21 19:51:14,013 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 07:51:14 BasicIcfg [2024-06-21 19:51:14,013 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 19:51:14,014 INFO L158 Benchmark]: Toolchain (without parser) took 76665.64ms. Allocated memory was 138.4MB in the beginning and 866.1MB in the end (delta: 727.7MB). Free memory was 87.0MB in the beginning and 399.3MB in the end (delta: -312.3MB). Peak memory consumption was 417.5MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,014 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:51:14,014 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:51:14,014 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.30ms. Allocated memory is still 138.4MB. Free memory was 86.4MB in the beginning and 57.1MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,015 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.73ms. Allocated memory is still 138.4MB. Free memory was 57.1MB in the beginning and 53.5MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,015 INFO L158 Benchmark]: Boogie Preprocessor took 47.62ms. Allocated memory is still 138.4MB. Free memory was 53.5MB in the beginning and 50.2MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,015 INFO L158 Benchmark]: RCFGBuilder took 828.68ms. Allocated memory was 138.4MB in the beginning and 199.2MB in the end (delta: 60.8MB). Free memory was 50.2MB in the beginning and 128.4MB in the end (delta: -78.2MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,016 INFO L158 Benchmark]: TraceAbstraction took 75097.37ms. Allocated memory was 199.2MB in the beginning and 866.1MB in the end (delta: 666.9MB). Free memory was 127.4MB in the beginning and 399.3MB in the end (delta: -271.9MB). Peak memory consumption was 393.9MB. Max. memory is 16.1GB. [2024-06-21 19:51:14,017 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.19ms. Allocated memory is still 138.4MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.30ms. Allocated memory is still 138.4MB. Free memory was 86.4MB in the beginning and 57.1MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.73ms. Allocated memory is still 138.4MB. Free memory was 57.1MB in the beginning and 53.5MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.62ms. Allocated memory is still 138.4MB. Free memory was 53.5MB in the beginning and 50.2MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 828.68ms. Allocated memory was 138.4MB in the beginning and 199.2MB in the end (delta: 60.8MB). Free memory was 50.2MB in the beginning and 128.4MB in the end (delta: -78.2MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * TraceAbstraction took 75097.37ms. Allocated memory was 199.2MB in the beginning and 866.1MB in the end (delta: 666.9MB). Free memory was 127.4MB in the beginning and 399.3MB in the end (delta: -271.9MB). Peak memory consumption was 393.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 830]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 832]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 833]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 69 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 75.0s, OverallIterations: 80, TraceHistogramMax: 1, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 25.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3552 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2939 mSDsluCounter, 647 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 453 mSDsCounter, 481 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16949 IncrementalHoareTripleChecker+Invalid, 17430 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 481 mSolverCounterUnsat, 194 mSDtfsCounter, 16949 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 525 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 522 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1224occurred in iteration=43, InterpolantAutomatonStates: 578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 47.6s InterpolantComputationTime, 1618 NumberOfCodeBlocks, 1618 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 1538 ConstructedInterpolants, 0 QuantifiedInterpolants, 38600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 80 InterpolantComputations, 80 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 19:51:14,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE