./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_power.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/protection/safe028_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe028_power.i ./goblint.2024-06-19_11-23-25.files/protection/safe028_power.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:32:21,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:32:21,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:32:21,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:32:21,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:32:21,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:32:21,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:32:21,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:32:21,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:32:21,467 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:32:21,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:32:21,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:32:21,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:32:21,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:32:21,469 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:32:21,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:32:21,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:32:21,470 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:32:21,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:32:21,471 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:32:21,471 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:32:21,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:32:21,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:32:21,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:32:21,472 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:32:21,473 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:32:21,473 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:32:21,473 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:32:21,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:32:21,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:32:21,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:32:21,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:32:21,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:32:21,475 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:32:21,475 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:32:21,475 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:32:21,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:32:21,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:32:21,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:32:21,476 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:32:21,476 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:32:21,476 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:32:21,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:32:21,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:32:21,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:32:21,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:32:21,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:32:21,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:32:21,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:32:21,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-27 21:32:22,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:32:23,131 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:32:23,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-27 21:32:23,156 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3affe0305/03efd2107b544e71abf3b6a5605d047e/FLAG3e465491c [2024-06-27 21:32:23,168 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3affe0305/03efd2107b544e71abf3b6a5605d047e [2024-06-27 21:32:23,170 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:32:23,170 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:32:23,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe028_power.yml/witness.yml [2024-06-27 21:32:23,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:32:23,410 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:32:23,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:32:23,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:32:23,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:32:23,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:32:23" (1/2) ... [2024-06-27 21:32:23,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6a5114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:23, skipping insertion in model container [2024-06-27 21:32:23,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:32:23" (1/2) ... [2024-06-27 21:32:23,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dde1fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:32:23, skipping insertion in model container [2024-06-27 21:32:23,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:23" (2/2) ... [2024-06-27 21:32:23,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6a5114 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:23, skipping insertion in model container [2024-06-27 21:32:23,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:23" (2/2) ... [2024-06-27 21:32:23,426 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:32:23,572 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:32:23,574 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:32:23,574 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:32:23,574 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-27 21:32:23,575 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:32:23,575 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-27 21:32:23,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:32:24,031 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:32:24,041 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:32:24,217 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:32:24,275 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:32:24,275 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24 WrapperNode [2024-06-27 21:32:24,275 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:32:24,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:32:24,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:32:24,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:32:24,284 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 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,318 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 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,371 INFO L138 Inliner]: procedures = 175, calls = 78, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 215 [2024-06-27 21:32:24,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:32:24,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:32:24,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:32:24,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:32:24,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,402 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,435 INFO L175 MemorySlicer]: Split 36 memory accesses to 2 slices as follows [2, 34]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 21:32:24,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:32:24,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:32:24,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:32:24,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:32:24,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (1/1) ... [2024-06-27 21:32:24,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:32:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:32:24,517 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) [2024-06-27 21:32:24,521 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 [2024-06-27 21:32:24,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:32:24,548 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:32:24,548 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:32:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:32:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:32:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:32:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:32:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:32:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:32:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:32:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:32:24,551 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:32:24,681 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:32:24,683 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:32:25,252 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:32:25,252 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:32:25,653 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:32:25,653 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:32:25,653 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:32:25 BoogieIcfgContainer [2024-06-27 21:32:25,653 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:32:25,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:32:25,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:32:25,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:32:25,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:32:23" (1/4) ... [2024-06-27 21:32:25,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7797d17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:32:25, skipping insertion in model container [2024-06-27 21:32:25,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:32:23" (2/4) ... [2024-06-27 21:32:25,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7797d17a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:32:25, skipping insertion in model container [2024-06-27 21:32:25,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:32:24" (3/4) ... [2024-06-27 21:32:25,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7797d17a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:32:25, skipping insertion in model container [2024-06-27 21:32:25,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:32:25" (4/4) ... [2024-06-27 21:32:25,661 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_power.i [2024-06-27 21:32:25,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:32:25,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:32:25,679 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:32:25,743 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:32:25,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:32:25,803 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 21:32:25,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:32:25,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 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. [2024-06-27 21:32:25,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 21:32:25,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 21:32:25,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:32:25,823 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;@5219fa75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:32:25,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:32:25,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:32:25,827 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:32:25,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:32:25,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:32:25,829 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)] === [2024-06-27 21:32:25,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash 819263669, now seen corresponding path program 1 times [2024-06-27 21:32:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:25,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034600247] [2024-06-27 21:32:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:27,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:27,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034600247] [2024-06-27 21:32:27,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034600247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:27,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:27,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:32:27,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218137322] [2024-06-27 21:32:27,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:27,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:32:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:32:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:32:27,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 21:32:27,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:27,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:27,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 21:32:27,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:28,396 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-27 21:32:28,397 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 21:32:28,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7668 event pairs, 650 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-27 21:32:28,414 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 21:32:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-27 21:32:28,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:32:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:32:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 21:32:28,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 21:32:28,429 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-27 21:32:28,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-27 21:32:28,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:28,436 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 21:32:28,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 21:32:28,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 21:32:28,442 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 21:32:28,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:28,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:28,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:28,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:32:28,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:28,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1333501198, now seen corresponding path program 1 times [2024-06-27 21:32:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:28,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109163588] [2024-06-27 21:32:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:28,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109163588] [2024-06-27 21:32:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109163588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:32:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499934390] [2024-06-27 21:32:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:30,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:32:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:32:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:32:30,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:30,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:30,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:30,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:30,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:30,599 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-27 21:32:30,599 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-27 21:32:30,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8235 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-27 21:32:30,610 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-27 21:32:30,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-27 21:32:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:32:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:32:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 21:32:30,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 21:32:30,612 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-27 21:32:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-27 21:32:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:32:30,615 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 21:32:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 21:32:30,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 21:32:30,616 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 21:32:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:30,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:30,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:32:30,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:30,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1043533556, now seen corresponding path program 1 times [2024-06-27 21:32:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740412686] [2024-06-27 21:32:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740412686] [2024-06-27 21:32:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740412686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:33,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846703786] [2024-06-27 21:32:33,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:33,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:33,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:33,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:33,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:33,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:33,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:34,053 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-27 21:32:34,054 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-27 21:32:34,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8114 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-27 21:32:34,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-27 21:32:34,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-27 21:32:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 21:32:34,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-27 21:32:34,069 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-27 21:32:34,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-27 21:32:34,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:32:34,072 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 21:32:34,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 21:32:34,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 21:32:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 21:32:34,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:34,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:34,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:32:34,075 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)] === [2024-06-27 21:32:34,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1907945375, now seen corresponding path program 1 times [2024-06-27 21:32:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:34,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447245298] [2024-06-27 21:32:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:35,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:35,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447245298] [2024-06-27 21:32:35,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447245298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:35,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:35,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174624364] [2024-06-27 21:32:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:35,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:35,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2024-06-27 21:32:35,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:35,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:35,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:36,251 INFO L124 PetriNetUnfolderBase]: 964/1547 cut-off events. [2024-06-27 21:32:36,252 INFO L125 PetriNetUnfolderBase]: For 1573/1573 co-relation queries the response was YES. [2024-06-27 21:32:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1547 events. 964/1547 cut-off events. For 1573/1573 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7442 event pairs, 382 based on Foata normal form. 2/1548 useless extension candidates. Maximal degree in co-relation 4310. Up to 1452 conditions per place. [2024-06-27 21:32:36,263 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 21:32:36,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-27 21:32:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:32:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:32:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 21:32:36,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 21:32:36,266 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-27 21:32:36,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-27 21:32:36,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:36,273 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 21:32:36,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 21:32:36,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 21:32:36,275 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 21:32:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2024-06-27 21:32:36,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:36,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:32:36,276 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)] === [2024-06-27 21:32:36,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -983233687, now seen corresponding path program 1 times [2024-06-27 21:32:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:36,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334262603] [2024-06-27 21:32:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:36,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:38,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334262603] [2024-06-27 21:32:38,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334262603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:38,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:38,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:32:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560833847] [2024-06-27 21:32:38,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:32:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:32:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:32:38,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:38,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:38,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:38,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:38,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:39,080 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-27 21:32:39,081 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2024-06-27 21:32:39,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 1558 events. 959/1558 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7508 event pairs, 367 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 4633. Up to 1434 conditions per place. [2024-06-27 21:32:39,090 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-27 21:32:39,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 386 flow [2024-06-27 21:32:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:32:39,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:32:39,092 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:32:39,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 386 flow [2024-06-27 21:32:39,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:39,095 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-27 21:32:39,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 21:32:39,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-27 21:32:39,097 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-27 21:32:39,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:39,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:39,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:32:39,097 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)] === [2024-06-27 21:32:39,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1270289886, now seen corresponding path program 1 times [2024-06-27 21:32:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:39,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180809651] [2024-06-27 21:32:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:39,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180809651] [2024-06-27 21:32:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180809651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:40,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:32:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692411053] [2024-06-27 21:32:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:32:40,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:32:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:32:40,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:40,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:40,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:40,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:40,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:41,693 INFO L124 PetriNetUnfolderBase]: 1155/1785 cut-off events. [2024-06-27 21:32:41,694 INFO L125 PetriNetUnfolderBase]: For 3767/3767 co-relation queries the response was YES. [2024-06-27 21:32:41,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 1785 events. 1155/1785 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8341 event pairs, 428 based on Foata normal form. 4/1788 useless extension candidates. Maximal degree in co-relation 5846. Up to 1698 conditions per place. [2024-06-27 21:32:41,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-27 21:32:41,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 454 flow [2024-06-27 21:32:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:32:41,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 21:32:41,710 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:32:41,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 454 flow [2024-06-27 21:32:41,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 424 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:41,716 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 258 flow [2024-06-27 21:32:41,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 21:32:41,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 21:32:41,719 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 258 flow [2024-06-27 21:32:41,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:41,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:41,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:41,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:32:41,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:41,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1232573736, now seen corresponding path program 2 times [2024-06-27 21:32:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:41,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481782804] [2024-06-27 21:32:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481782804] [2024-06-27 21:32:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481782804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:43,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:43,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:32:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398012722] [2024-06-27 21:32:43,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:43,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:32:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:32:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:32:43,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:43,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:43,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:43,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:43,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:44,042 INFO L124 PetriNetUnfolderBase]: 1163/1796 cut-off events. [2024-06-27 21:32:44,042 INFO L125 PetriNetUnfolderBase]: For 5165/5165 co-relation queries the response was YES. [2024-06-27 21:32:44,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 1796 events. 1163/1796 cut-off events. For 5165/5165 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8457 event pairs, 437 based on Foata normal form. 4/1797 useless extension candidates. Maximal degree in co-relation 6332. Up to 1677 conditions per place. [2024-06-27 21:32:44,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 21:32:44,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 480 flow [2024-06-27 21:32:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:32:44,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 21:32:44,057 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 258 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:32:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 480 flow [2024-06-27 21:32:44,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 448 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:44,061 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 298 flow [2024-06-27 21:32:44,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 21:32:44,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 21:32:44,063 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 298 flow [2024-06-27 21:32:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:44,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:44,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:44,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:32:44,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:44,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash -415471362, now seen corresponding path program 1 times [2024-06-27 21:32:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385707156] [2024-06-27 21:32:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385707156] [2024-06-27 21:32:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385707156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:46,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:46,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773708843] [2024-06-27 21:32:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:46,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:46,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:46,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:32:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:46,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:32:46,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:46,848 INFO L124 PetriNetUnfolderBase]: 985/1611 cut-off events. [2024-06-27 21:32:46,848 INFO L125 PetriNetUnfolderBase]: For 5516/5516 co-relation queries the response was YES. [2024-06-27 21:32:46,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5905 conditions, 1611 events. 985/1611 cut-off events. For 5516/5516 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7825 event pairs, 336 based on Foata normal form. 4/1614 useless extension candidates. Maximal degree in co-relation 5883. Up to 1450 conditions per place. [2024-06-27 21:32:46,859 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-27 21:32:46,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 534 flow [2024-06-27 21:32:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:32:46,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:32:46,863 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 298 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:32:46,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 534 flow [2024-06-27 21:32:46,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 486 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:46,868 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 311 flow [2024-06-27 21:32:46,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-27 21:32:46,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 21:32:46,869 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 311 flow [2024-06-27 21:32:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:46,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:32:46,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:46,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -724278970, now seen corresponding path program 1 times [2024-06-27 21:32:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629582803] [2024-06-27 21:32:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:49,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:49,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629582803] [2024-06-27 21:32:49,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629582803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:49,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:49,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:49,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850646551] [2024-06-27 21:32:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:49,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:49,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:49,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:49,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:49,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:49,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:49,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:49,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:50,090 INFO L124 PetriNetUnfolderBase]: 1181/1829 cut-off events. [2024-06-27 21:32:50,090 INFO L125 PetriNetUnfolderBase]: For 8123/8123 co-relation queries the response was YES. [2024-06-27 21:32:50,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 1829 events. 1181/1829 cut-off events. For 8123/8123 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8579 event pairs, 406 based on Foata normal form. 4/1832 useless extension candidates. Maximal degree in co-relation 7056. Up to 1714 conditions per place. [2024-06-27 21:32:50,100 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-06-27 21:32:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 587 flow [2024-06-27 21:32:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:32:50,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 21:32:50,103 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 311 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:32:50,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 587 flow [2024-06-27 21:32:50,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 544 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:50,108 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 349 flow [2024-06-27 21:32:50,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 21:32:50,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 21:32:50,109 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 349 flow [2024-06-27 21:32:50,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:50,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:50,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:50,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:32:50,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:50,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1707977162, now seen corresponding path program 2 times [2024-06-27 21:32:50,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:50,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439449359] [2024-06-27 21:32:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:50,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439449359] [2024-06-27 21:32:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439449359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:52,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:52,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:52,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266649531] [2024-06-27 21:32:52,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:52,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:52,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:52,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:52,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 349 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:52,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:52,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:52,883 INFO L124 PetriNetUnfolderBase]: 1207/1866 cut-off events. [2024-06-27 21:32:52,883 INFO L125 PetriNetUnfolderBase]: For 10269/10269 co-relation queries the response was YES. [2024-06-27 21:32:52,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7774 conditions, 1866 events. 1207/1866 cut-off events. For 10269/10269 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8753 event pairs, 415 based on Foata normal form. 4/1867 useless extension candidates. Maximal degree in co-relation 7750. Up to 1719 conditions per place. [2024-06-27 21:32:52,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-27 21:32:52,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 633 flow [2024-06-27 21:32:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:32:52,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:32:52,896 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 349 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:32:52,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 633 flow [2024-06-27 21:32:52,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:52,904 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 397 flow [2024-06-27 21:32:52,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 21:32:52,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 21:32:52,905 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 397 flow [2024-06-27 21:32:52,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:52,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:52,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:52,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:32:52,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:52,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1909058972, now seen corresponding path program 3 times [2024-06-27 21:32:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882115705] [2024-06-27 21:32:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:52,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:54,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:54,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882115705] [2024-06-27 21:32:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882115705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:54,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299086840] [2024-06-27 21:32:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:54,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:54,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:54,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:54,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:54,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:55,437 INFO L124 PetriNetUnfolderBase]: 1202/1859 cut-off events. [2024-06-27 21:32:55,437 INFO L125 PetriNetUnfolderBase]: For 12463/12463 co-relation queries the response was YES. [2024-06-27 21:32:55,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8242 conditions, 1859 events. 1202/1859 cut-off events. For 12463/12463 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8717 event pairs, 415 based on Foata normal form. 2/1858 useless extension candidates. Maximal degree in co-relation 8217. Up to 1712 conditions per place. [2024-06-27 21:32:55,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-27 21:32:55,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 760 flow [2024-06-27 21:32:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 21:32:55,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 21:32:55,451 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 397 flow. Second operand 7 states and 124 transitions. [2024-06-27 21:32:55,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 760 flow [2024-06-27 21:32:55,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 660 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:55,458 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 513 flow [2024-06-27 21:32:55,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=513, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-27 21:32:55,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 21:32:55,459 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 513 flow [2024-06-27 21:32:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:55,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:55,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:55,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:32:55,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:55,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:55,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1697188097, now seen corresponding path program 1 times [2024-06-27 21:32:55,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:55,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673641172] [2024-06-27 21:32:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:55,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673641172] [2024-06-27 21:32:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673641172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:57,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:57,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:32:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180013374] [2024-06-27 21:32:57,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:32:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:32:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:32:57,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:32:57,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:57,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:57,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:32:57,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:58,182 INFO L124 PetriNetUnfolderBase]: 1245/1941 cut-off events. [2024-06-27 21:32:58,182 INFO L125 PetriNetUnfolderBase]: For 14865/14865 co-relation queries the response was YES. [2024-06-27 21:32:58,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1941 events. 1245/1941 cut-off events. For 14865/14865 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9192 event pairs, 406 based on Foata normal form. 2/1942 useless extension candidates. Maximal degree in co-relation 8953. Up to 1821 conditions per place. [2024-06-27 21:32:58,196 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-27 21:32:58,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 123 transitions, 923 flow [2024-06-27 21:32:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:32:58,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:32:58,198 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 513 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:32:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 123 transitions, 923 flow [2024-06-27 21:32:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 865 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:58,210 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 613 flow [2024-06-27 21:32:58,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2024-06-27 21:32:58,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 21:32:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 613 flow [2024-06-27 21:32:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:32:58,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash -72627231, now seen corresponding path program 2 times [2024-06-27 21:32:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340547157] [2024-06-27 21:32:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:00,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:00,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340547157] [2024-06-27 21:33:00,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340547157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:00,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231410624] [2024-06-27 21:33:00,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:00,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:00,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:00,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:00,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:00,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:00,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:00,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:01,058 INFO L124 PetriNetUnfolderBase]: 1240/1934 cut-off events. [2024-06-27 21:33:01,058 INFO L125 PetriNetUnfolderBase]: For 17174/17174 co-relation queries the response was YES. [2024-06-27 21:33:01,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 1934 events. 1240/1934 cut-off events. For 17174/17174 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9220 event pairs, 388 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 9257. Up to 1784 conditions per place. [2024-06-27 21:33:01,071 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-27 21:33:01,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 985 flow [2024-06-27 21:33:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:33:01,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 21:33:01,074 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 613 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:33:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 985 flow [2024-06-27 21:33:01,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 921 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:01,087 INFO L231 Difference]: Finished difference. Result has 80 places, 91 transitions, 663 flow [2024-06-27 21:33:01,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=80, PETRI_TRANSITIONS=91} [2024-06-27 21:33:01,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 21:33:01,088 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 91 transitions, 663 flow [2024-06-27 21:33:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:01,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:01,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:33:01,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:01,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1635583757, now seen corresponding path program 1 times [2024-06-27 21:33:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148819059] [2024-06-27 21:33:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148819059] [2024-06-27 21:33:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148819059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:03,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:03,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66351232] [2024-06-27 21:33:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:03,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:03,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 91 transitions, 663 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:03,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:03,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:03,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:04,249 INFO L124 PetriNetUnfolderBase]: 1348/2114 cut-off events. [2024-06-27 21:33:04,249 INFO L125 PetriNetUnfolderBase]: For 24202/24202 co-relation queries the response was YES. [2024-06-27 21:33:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10609 conditions, 2114 events. 1348/2114 cut-off events. For 24202/24202 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10404 event pairs, 396 based on Foata normal form. 24/2137 useless extension candidates. Maximal degree in co-relation 10577. Up to 1802 conditions per place. [2024-06-27 21:33:04,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 102 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-27 21:33:04,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1088 flow [2024-06-27 21:33:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:33:04,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:33:04,267 INFO L175 Difference]: Start difference. First operand has 80 places, 91 transitions, 663 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:33:04,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1088 flow [2024-06-27 21:33:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 131 transitions, 996 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:04,285 INFO L231 Difference]: Finished difference. Result has 83 places, 93 transitions, 673 flow [2024-06-27 21:33:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=83, PETRI_TRANSITIONS=93} [2024-06-27 21:33:04,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-27 21:33:04,286 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 93 transitions, 673 flow [2024-06-27 21:33:04,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:33:04,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash 948485235, now seen corresponding path program 2 times [2024-06-27 21:33:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598989482] [2024-06-27 21:33:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:06,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:06,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598989482] [2024-06-27 21:33:06,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598989482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:06,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:06,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920592182] [2024-06-27 21:33:06,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:06,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:06,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 93 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:06,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:06,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:06,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:07,530 INFO L124 PetriNetUnfolderBase]: 1456/2301 cut-off events. [2024-06-27 21:33:07,530 INFO L125 PetriNetUnfolderBase]: For 25725/25725 co-relation queries the response was YES. [2024-06-27 21:33:07,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2301 events. 1456/2301 cut-off events. For 25725/25725 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11598 event pairs, 423 based on Foata normal form. 24/2321 useless extension candidates. Maximal degree in co-relation 11363. Up to 1949 conditions per place. [2024-06-27 21:33:07,543 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 31 changer transitions 0/130 dead transitions. [2024-06-27 21:33:07,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 1086 flow [2024-06-27 21:33:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:33:07,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 21:33:07,546 INFO L175 Difference]: Start difference. First operand has 83 places, 93 transitions, 673 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:33:07,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 1086 flow [2024-06-27 21:33:07,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 1036 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:07,568 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 737 flow [2024-06-27 21:33:07,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=737, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2024-06-27 21:33:07,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 21:33:07,570 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 737 flow [2024-06-27 21:33:07,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:33:07,571 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:07,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1399111727, now seen corresponding path program 3 times [2024-06-27 21:33:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004506730] [2024-06-27 21:33:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:07,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:09,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:09,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004506730] [2024-06-27 21:33:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004506730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:09,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944346595] [2024-06-27 21:33:09,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:09,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:09,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:09,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 737 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:09,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:09,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:09,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:10,669 INFO L124 PetriNetUnfolderBase]: 1476/2333 cut-off events. [2024-06-27 21:33:10,670 INFO L125 PetriNetUnfolderBase]: For 27216/27216 co-relation queries the response was YES. [2024-06-27 21:33:10,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11866 conditions, 2333 events. 1476/2333 cut-off events. For 27216/27216 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11868 event pairs, 387 based on Foata normal form. 4/2333 useless extension candidates. Maximal degree in co-relation 11832. Up to 1691 conditions per place. [2024-06-27 21:33:10,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 49 changer transitions 0/136 dead transitions. [2024-06-27 21:33:10,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1265 flow [2024-06-27 21:33:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:33:10,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 21:33:10,687 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 737 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:33:10,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1265 flow [2024-06-27 21:33:10,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 1197 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:10,714 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 862 flow [2024-06-27 21:33:10,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-27 21:33:10,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 21:33:10,714 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 862 flow [2024-06-27 21:33:10,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:10,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:10,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:33:10,715 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:10,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1399408397, now seen corresponding path program 4 times [2024-06-27 21:33:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:10,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236740333] [2024-06-27 21:33:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:12,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236740333] [2024-06-27 21:33:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236740333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795535837] [2024-06-27 21:33:12,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:12,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:12,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:12,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:12,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:12,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:12,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:14,018 INFO L124 PetriNetUnfolderBase]: 1468/2315 cut-off events. [2024-06-27 21:33:14,018 INFO L125 PetriNetUnfolderBase]: For 28907/28907 co-relation queries the response was YES. [2024-06-27 21:33:14,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12036 conditions, 2315 events. 1468/2315 cut-off events. For 28907/28907 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11675 event pairs, 421 based on Foata normal form. 4/2315 useless extension candidates. Maximal degree in co-relation 12001. Up to 1903 conditions per place. [2024-06-27 21:33:14,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 45 changer transitions 0/139 dead transitions. [2024-06-27 21:33:14,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1269 flow [2024-06-27 21:33:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:33:14,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:33:14,033 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 862 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:33:14,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1269 flow [2024-06-27 21:33:14,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 139 transitions, 1153 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:14,067 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 850 flow [2024-06-27 21:33:14,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=850, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-27 21:33:14,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 21:33:14,067 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 850 flow [2024-06-27 21:33:14,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:14,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:14,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:14,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:33:14,068 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)] === [2024-06-27 21:33:14,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash 994246118, now seen corresponding path program 1 times [2024-06-27 21:33:14,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:14,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646716821] [2024-06-27 21:33:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:14,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646716821] [2024-06-27 21:33:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646716821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:15,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:15,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:33:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032690239] [2024-06-27 21:33:15,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:33:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:33:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:33:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:33:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:33:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:16,431 INFO L124 PetriNetUnfolderBase]: 1292/2125 cut-off events. [2024-06-27 21:33:16,431 INFO L125 PetriNetUnfolderBase]: For 24673/24673 co-relation queries the response was YES. [2024-06-27 21:33:16,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10842 conditions, 2125 events. 1292/2125 cut-off events. For 24673/24673 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11019 event pairs, 352 based on Foata normal form. 2/2126 useless extension candidates. Maximal degree in co-relation 10806. Up to 1987 conditions per place. [2024-06-27 21:33:16,443 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 99 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-27 21:33:16,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 113 transitions, 1114 flow [2024-06-27 21:33:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:33:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:33:16,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 21:33:16,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 21:33:16,445 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 850 flow. Second operand 5 states and 89 transitions. [2024-06-27 21:33:16,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 113 transitions, 1114 flow [2024-06-27 21:33:16,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 113 transitions, 1009 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 21:33:16,494 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 793 flow [2024-06-27 21:33:16,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=793, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-27 21:33:16,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 21:33:16,495 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 793 flow [2024-06-27 21:33:16,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:16,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:16,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:16,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:33:16,496 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:16,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1719668043, now seen corresponding path program 1 times [2024-06-27 21:33:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:16,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543142968] [2024-06-27 21:33:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:18,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:18,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543142968] [2024-06-27 21:33:18,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543142968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:18,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:18,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785223796] [2024-06-27 21:33:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:18,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:18,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:18,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:18,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:18,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:18,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:20,060 INFO L124 PetriNetUnfolderBase]: 1472/2333 cut-off events. [2024-06-27 21:33:20,060 INFO L125 PetriNetUnfolderBase]: For 30350/30350 co-relation queries the response was YES. [2024-06-27 21:33:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12268 conditions, 2333 events. 1472/2333 cut-off events. For 30350/30350 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11790 event pairs, 393 based on Foata normal form. 2/2334 useless extension candidates. Maximal degree in co-relation 12231. Up to 2154 conditions per place. [2024-06-27 21:33:20,078 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-27 21:33:20,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1223 flow [2024-06-27 21:33:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:33:20,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:33:20,080 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 793 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:33:20,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1223 flow [2024-06-27 21:33:20,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1197 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:20,100 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 890 flow [2024-06-27 21:33:20,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=890, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-27 21:33:20,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-27 21:33:20,101 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 890 flow [2024-06-27 21:33:20,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:20,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:20,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:20,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:33:20,102 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:20,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:20,102 INFO L85 PathProgramCache]: Analyzing trace with hash -391428847, now seen corresponding path program 2 times [2024-06-27 21:33:20,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748612757] [2024-06-27 21:33:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:22,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:22,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748612757] [2024-06-27 21:33:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748612757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:22,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720593957] [2024-06-27 21:33:22,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:22,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:22,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:22,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:22,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:22,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:22,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:22,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:22,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:22,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:23,910 INFO L124 PetriNetUnfolderBase]: 1485/2358 cut-off events. [2024-06-27 21:33:23,911 INFO L125 PetriNetUnfolderBase]: For 34399/34399 co-relation queries the response was YES. [2024-06-27 21:33:23,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12913 conditions, 2358 events. 1485/2358 cut-off events. For 34399/34399 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12039 event pairs, 393 based on Foata normal form. 2/2359 useless extension candidates. Maximal degree in co-relation 12875. Up to 2185 conditions per place. [2024-06-27 21:33:23,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 21:33:23,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 146 transitions, 1342 flow [2024-06-27 21:33:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:33:23,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:33:23,925 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 890 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:33:23,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 146 transitions, 1342 flow [2024-06-27 21:33:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 146 transitions, 1245 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:23,950 INFO L231 Difference]: Finished difference. Result has 97 places, 109 transitions, 932 flow [2024-06-27 21:33:23,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=932, PETRI_PLACES=97, PETRI_TRANSITIONS=109} [2024-06-27 21:33:23,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 21:33:23,951 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 109 transitions, 932 flow [2024-06-27 21:33:23,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:23,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:33:23,952 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash 524239945, now seen corresponding path program 3 times [2024-06-27 21:33:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895664343] [2024-06-27 21:33:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:26,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895664343] [2024-06-27 21:33:26,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895664343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:26,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:26,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:26,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727070286] [2024-06-27 21:33:26,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:26,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:26,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:26,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:26,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 109 transitions, 932 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:26,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:26,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:26,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:27,060 INFO L124 PetriNetUnfolderBase]: 1498/2368 cut-off events. [2024-06-27 21:33:27,060 INFO L125 PetriNetUnfolderBase]: For 39289/39289 co-relation queries the response was YES. [2024-06-27 21:33:27,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13438 conditions, 2368 events. 1498/2368 cut-off events. For 39289/39289 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12107 event pairs, 415 based on Foata normal form. 2/2363 useless extension candidates. Maximal degree in co-relation 13398. Up to 2115 conditions per place. [2024-06-27 21:33:27,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 42 changer transitions 0/141 dead transitions. [2024-06-27 21:33:27,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 141 transitions, 1354 flow [2024-06-27 21:33:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:33:27,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 21:33:27,073 INFO L175 Difference]: Start difference. First operand has 97 places, 109 transitions, 932 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:33:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 141 transitions, 1354 flow [2024-06-27 21:33:27,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 141 transitions, 1248 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:27,097 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 992 flow [2024-06-27 21:33:27,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=992, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-27 21:33:27,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 21:33:27,098 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 992 flow [2024-06-27 21:33:27,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:27,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:27,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:33:27,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:27,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 780740455, now seen corresponding path program 4 times [2024-06-27 21:33:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357855206] [2024-06-27 21:33:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357855206] [2024-06-27 21:33:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357855206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:29,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:29,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818949049] [2024-06-27 21:33:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:29,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:29,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 992 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:29,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:29,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:29,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:30,379 INFO L124 PetriNetUnfolderBase]: 1493/2361 cut-off events. [2024-06-27 21:33:30,379 INFO L125 PetriNetUnfolderBase]: For 43028/43028 co-relation queries the response was YES. [2024-06-27 21:33:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13737 conditions, 2361 events. 1493/2361 cut-off events. For 43028/43028 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12032 event pairs, 415 based on Foata normal form. 2/2356 useless extension candidates. Maximal degree in co-relation 13696. Up to 2025 conditions per place. [2024-06-27 21:33:30,395 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 60 changer transitions 0/144 dead transitions. [2024-06-27 21:33:30,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 1426 flow [2024-06-27 21:33:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:33:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 21:33:30,398 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 992 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:33:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 1426 flow [2024-06-27 21:33:30,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 1284 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:30,440 INFO L231 Difference]: Finished difference. Result has 101 places, 115 transitions, 1058 flow [2024-06-27 21:33:30,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1058, PETRI_PLACES=101, PETRI_TRANSITIONS=115} [2024-06-27 21:33:30,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-27 21:33:30,440 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 115 transitions, 1058 flow [2024-06-27 21:33:30,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:30,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:30,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:33:30,441 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:30,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1095585396, now seen corresponding path program 1 times [2024-06-27 21:33:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24477179] [2024-06-27 21:33:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:30,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:32,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24477179] [2024-06-27 21:33:32,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24477179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:32,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:32,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:32,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631605504] [2024-06-27 21:33:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:32,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:32,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 115 transitions, 1058 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:32,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:32,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:32,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:33,273 INFO L124 PetriNetUnfolderBase]: 1607/2569 cut-off events. [2024-06-27 21:33:33,273 INFO L125 PetriNetUnfolderBase]: For 52116/52116 co-relation queries the response was YES. [2024-06-27 21:33:33,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15129 conditions, 2569 events. 1607/2569 cut-off events. For 52116/52116 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13409 event pairs, 393 based on Foata normal form. 16/2584 useless extension candidates. Maximal degree in co-relation 15087. Up to 2258 conditions per place. [2024-06-27 21:33:33,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 28 changer transitions 0/174 dead transitions. [2024-06-27 21:33:33,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 1664 flow [2024-06-27 21:33:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 21:33:33,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 21:33:33,291 INFO L175 Difference]: Start difference. First operand has 101 places, 115 transitions, 1058 flow. Second operand 9 states and 167 transitions. [2024-06-27 21:33:33,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 1664 flow [2024-06-27 21:33:33,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 174 transitions, 1468 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:33,322 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 1062 flow [2024-06-27 21:33:33,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1062, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2024-06-27 21:33:33,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 21:33:33,322 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 1062 flow [2024-06-27 21:33:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:33,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:33,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:33,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:33:33,323 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:33,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1883189712, now seen corresponding path program 2 times [2024-06-27 21:33:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628765195] [2024-06-27 21:33:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:35,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:35,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628765195] [2024-06-27 21:33:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628765195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:35,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:35,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977596485] [2024-06-27 21:33:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:35,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:35,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:35,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:35,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:35,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:36,398 INFO L124 PetriNetUnfolderBase]: 1627/2603 cut-off events. [2024-06-27 21:33:36,398 INFO L125 PetriNetUnfolderBase]: For 54449/54449 co-relation queries the response was YES. [2024-06-27 21:33:36,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15395 conditions, 2603 events. 1627/2603 cut-off events. For 54449/54449 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13593 event pairs, 268 based on Foata normal form. 4/2606 useless extension candidates. Maximal degree in co-relation 15350. Up to 2300 conditions per place. [2024-06-27 21:33:36,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-06-27 21:33:36,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 166 transitions, 1593 flow [2024-06-27 21:33:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:33:36,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:33:36,418 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 1062 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:33:36,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 166 transitions, 1593 flow [2024-06-27 21:33:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1514 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:36,458 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1153 flow [2024-06-27 21:33:36,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1153, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-27 21:33:36,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 21:33:36,459 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1153 flow [2024-06-27 21:33:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:36,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:36,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:33:36,460 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:36,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1770104878, now seen corresponding path program 3 times [2024-06-27 21:33:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942892130] [2024-06-27 21:33:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:38,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942892130] [2024-06-27 21:33:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942892130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:38,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:38,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531861129] [2024-06-27 21:33:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:38,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1153 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:38,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:38,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:38,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:39,634 INFO L124 PetriNetUnfolderBase]: 1619/2591 cut-off events. [2024-06-27 21:33:39,634 INFO L125 PetriNetUnfolderBase]: For 55663/55663 co-relation queries the response was YES. [2024-06-27 21:33:39,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 2591 events. 1619/2591 cut-off events. For 55663/55663 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13577 event pairs, 415 based on Foata normal form. 4/2594 useless extension candidates. Maximal degree in co-relation 15446. Up to 2364 conditions per place. [2024-06-27 21:33:39,651 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 31 changer transitions 0/167 dead transitions. [2024-06-27 21:33:39,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 167 transitions, 1645 flow [2024-06-27 21:33:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:33:39,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:33:39,654 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1153 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:33:39,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 167 transitions, 1645 flow [2024-06-27 21:33:39,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 1520 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:39,699 INFO L231 Difference]: Finished difference. Result has 111 places, 131 transitions, 1158 flow [2024-06-27 21:33:39,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1158, PETRI_PLACES=111, PETRI_TRANSITIONS=131} [2024-06-27 21:33:39,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 21:33:39,699 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 131 transitions, 1158 flow [2024-06-27 21:33:39,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:39,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:39,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:39,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:33:39,700 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:39,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1075233600, now seen corresponding path program 1 times [2024-06-27 21:33:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:39,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526441804] [2024-06-27 21:33:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:42,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:42,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526441804] [2024-06-27 21:33:42,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526441804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:42,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840509767] [2024-06-27 21:33:42,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:42,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:42,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:42,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 131 transitions, 1158 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:42,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:42,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:42,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:43,712 INFO L124 PetriNetUnfolderBase]: 1687/2707 cut-off events. [2024-06-27 21:33:43,713 INFO L125 PetriNetUnfolderBase]: For 66518/66518 co-relation queries the response was YES. [2024-06-27 21:33:43,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 2707 events. 1687/2707 cut-off events. For 66518/66518 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14406 event pairs, 429 based on Foata normal form. 16/2722 useless extension candidates. Maximal degree in co-relation 16339. Up to 2339 conditions per place. [2024-06-27 21:33:43,733 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 34 changer transitions 0/176 dead transitions. [2024-06-27 21:33:43,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1716 flow [2024-06-27 21:33:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:33:43,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:33:43,735 INFO L175 Difference]: Start difference. First operand has 111 places, 131 transitions, 1158 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:33:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1716 flow [2024-06-27 21:33:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1598 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:43,784 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1166 flow [2024-06-27 21:33:43,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1166, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-27 21:33:43,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 21:33:43,785 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1166 flow [2024-06-27 21:33:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:43,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:43,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:43,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:33:43,785 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:43,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash -898102080, now seen corresponding path program 2 times [2024-06-27 21:33:43,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:43,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769089929] [2024-06-27 21:33:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:43,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769089929] [2024-06-27 21:33:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769089929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:46,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451590635] [2024-06-27 21:33:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:46,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:46,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:46,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1166 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:46,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:46,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:46,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:47,903 INFO L124 PetriNetUnfolderBase]: 1755/2837 cut-off events. [2024-06-27 21:33:47,904 INFO L125 PetriNetUnfolderBase]: For 73002/73002 co-relation queries the response was YES. [2024-06-27 21:33:47,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17269 conditions, 2837 events. 1755/2837 cut-off events. For 73002/73002 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15266 event pairs, 457 based on Foata normal form. 16/2852 useless extension candidates. Maximal degree in co-relation 17221. Up to 2505 conditions per place. [2024-06-27 21:33:47,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-27 21:33:47,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 181 transitions, 1781 flow [2024-06-27 21:33:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:33:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:33:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 21:33:47,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-27 21:33:47,926 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1166 flow. Second operand 10 states and 177 transitions. [2024-06-27 21:33:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 181 transitions, 1781 flow [2024-06-27 21:33:47,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 181 transitions, 1701 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:47,971 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1245 flow [2024-06-27 21:33:47,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1245, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-27 21:33:47,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-27 21:33:47,972 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1245 flow [2024-06-27 21:33:47,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:47,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:47,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:47,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:33:47,972 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:47,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 922741888, now seen corresponding path program 3 times [2024-06-27 21:33:47,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:47,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440649169] [2024-06-27 21:33:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:47,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:50,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:50,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440649169] [2024-06-27 21:33:50,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440649169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:50,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:50,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101580204] [2024-06-27 21:33:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:50,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:50,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:50,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:50,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:50,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:50,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:52,022 INFO L124 PetriNetUnfolderBase]: 1803/2921 cut-off events. [2024-06-27 21:33:52,022 INFO L125 PetriNetUnfolderBase]: For 77982/77982 co-relation queries the response was YES. [2024-06-27 21:33:52,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18031 conditions, 2921 events. 1803/2921 cut-off events. For 77982/77982 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16008 event pairs, 443 based on Foata normal form. 12/2932 useless extension candidates. Maximal degree in co-relation 17982. Up to 2359 conditions per place. [2024-06-27 21:33:52,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-06-27 21:33:52,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 1833 flow [2024-06-27 21:33:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:33:52,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 21:33:52,042 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1245 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:33:52,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 1833 flow [2024-06-27 21:33:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1755 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 21:33:52,085 INFO L231 Difference]: Finished difference. Result has 118 places, 136 transitions, 1283 flow [2024-06-27 21:33:52,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=118, PETRI_TRANSITIONS=136} [2024-06-27 21:33:52,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:33:52,086 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 136 transitions, 1283 flow [2024-06-27 21:33:52,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:52,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:52,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:52,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:33:52,087 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)] === [2024-06-27 21:33:52,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 567543443, now seen corresponding path program 1 times [2024-06-27 21:33:52,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:52,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827907520] [2024-06-27 21:33:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:52,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827907520] [2024-06-27 21:33:53,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827907520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:53,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:53,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:33:53,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847896719] [2024-06-27 21:33:53,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:53,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:53,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:53,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:53,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 136 transitions, 1283 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:53,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:53,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:53,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:54,869 INFO L124 PetriNetUnfolderBase]: 1813/2932 cut-off events. [2024-06-27 21:33:54,869 INFO L125 PetriNetUnfolderBase]: For 77311/77311 co-relation queries the response was YES. [2024-06-27 21:33:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18131 conditions, 2932 events. 1813/2932 cut-off events. For 77311/77311 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16107 event pairs, 425 based on Foata normal form. 2/2933 useless extension candidates. Maximal degree in co-relation 18081. Up to 2726 conditions per place. [2024-06-27 21:33:54,887 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 132 selfloop transitions, 29 changer transitions 0/166 dead transitions. [2024-06-27 21:33:54,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 166 transitions, 1819 flow [2024-06-27 21:33:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 21:33:54,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 21:33:54,888 INFO L175 Difference]: Start difference. First operand has 118 places, 136 transitions, 1283 flow. Second operand 6 states and 109 transitions. [2024-06-27 21:33:54,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 166 transitions, 1819 flow [2024-06-27 21:33:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1733 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:54,929 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1360 flow [2024-06-27 21:33:54,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1360, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-27 21:33:54,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 21:33:54,930 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1360 flow [2024-06-27 21:33:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:54,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:54,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:33:54,931 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:54,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -934685136, now seen corresponding path program 4 times [2024-06-27 21:33:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033961007] [2024-06-27 21:33:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:57,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:57,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033961007] [2024-06-27 21:33:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033961007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:57,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:57,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:57,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41370800] [2024-06-27 21:33:57,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:57,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:33:57,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1360 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:57,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:57,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:33:57,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:58,590 INFO L124 PetriNetUnfolderBase]: 1881/3050 cut-off events. [2024-06-27 21:33:58,590 INFO L125 PetriNetUnfolderBase]: For 89666/89666 co-relation queries the response was YES. [2024-06-27 21:33:58,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19244 conditions, 3050 events. 1881/3050 cut-off events. For 89666/89666 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16947 event pairs, 456 based on Foata normal form. 16/3056 useless extension candidates. Maximal degree in co-relation 19192. Up to 2632 conditions per place. [2024-06-27 21:33:58,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 49 changer transitions 0/184 dead transitions. [2024-06-27 21:33:58,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 1926 flow [2024-06-27 21:33:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:33:58,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:33:58,614 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1360 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:33:58,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 1926 flow [2024-06-27 21:33:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1900 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 21:33:58,675 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1493 flow [2024-06-27 21:33:58,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1493, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-27 21:33:58,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 21:33:58,676 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1493 flow [2024-06-27 21:33:58,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:33:58,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:33:58,676 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:58,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash -928191876, now seen corresponding path program 5 times [2024-06-27 21:33:58,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408604018] [2024-06-27 21:33:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408604018] [2024-06-27 21:34:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408604018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118221568] [2024-06-27 21:34:01,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:01,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:01,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1493 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:01,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:01,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:01,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:02,394 INFO L124 PetriNetUnfolderBase]: 1977/3224 cut-off events. [2024-06-27 21:34:02,394 INFO L125 PetriNetUnfolderBase]: For 97339/97339 co-relation queries the response was YES. [2024-06-27 21:34:02,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20695 conditions, 3224 events. 1977/3224 cut-off events. For 97339/97339 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18263 event pairs, 474 based on Foata normal form. 12/3226 useless extension candidates. Maximal degree in co-relation 20640. Up to 2582 conditions per place. [2024-06-27 21:34:02,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 51 changer transitions 0/189 dead transitions. [2024-06-27 21:34:02,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 189 transitions, 2124 flow [2024-06-27 21:34:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:34:02,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 21:34:02,417 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1493 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:34:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 189 transitions, 2124 flow [2024-06-27 21:34:02,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 2003 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:02,482 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1571 flow [2024-06-27 21:34:02,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1571, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-27 21:34:02,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 21:34:02,483 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1571 flow [2024-06-27 21:34:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:02,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:02,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:34:02,484 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:02,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -221554288, now seen corresponding path program 6 times [2024-06-27 21:34:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503163959] [2024-06-27 21:34:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:04,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:04,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503163959] [2024-06-27 21:34:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503163959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:04,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:04,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195864557] [2024-06-27 21:34:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:04,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:05,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:05,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1571 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:05,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:05,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:05,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:06,398 INFO L124 PetriNetUnfolderBase]: 2189/3616 cut-off events. [2024-06-27 21:34:06,398 INFO L125 PetriNetUnfolderBase]: For 113905/113905 co-relation queries the response was YES. [2024-06-27 21:34:06,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23543 conditions, 3616 events. 2189/3616 cut-off events. For 113905/113905 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21206 event pairs, 503 based on Foata normal form. 12/3618 useless extension candidates. Maximal degree in co-relation 23486. Up to 2109 conditions per place. [2024-06-27 21:34:06,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 78 changer transitions 0/196 dead transitions. [2024-06-27 21:34:06,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 196 transitions, 2424 flow [2024-06-27 21:34:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:34:06,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:34:06,426 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1571 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:34:06,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 196 transitions, 2424 flow [2024-06-27 21:34:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 196 transitions, 2298 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:06,515 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1805 flow [2024-06-27 21:34:06,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1805, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-27 21:34:06,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 21:34:06,515 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1805 flow [2024-06-27 21:34:06,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:06,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:06,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:06,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:34:06,516 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:06,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -506654158, now seen corresponding path program 7 times [2024-06-27 21:34:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469680999] [2024-06-27 21:34:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469680999] [2024-06-27 21:34:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469680999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697733318] [2024-06-27 21:34:09,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:09,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:09,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1805 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:09,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:09,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:09,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:10,369 INFO L124 PetriNetUnfolderBase]: 2237/3688 cut-off events. [2024-06-27 21:34:10,369 INFO L125 PetriNetUnfolderBase]: For 122459/122459 co-relation queries the response was YES. [2024-06-27 21:34:10,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24593 conditions, 3688 events. 2237/3688 cut-off events. For 122459/122459 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21909 event pairs, 566 based on Foata normal form. 12/3690 useless extension candidates. Maximal degree in co-relation 24534. Up to 3027 conditions per place. [2024-06-27 21:34:10,397 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 69 changer transitions 0/196 dead transitions. [2024-06-27 21:34:10,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 2554 flow [2024-06-27 21:34:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:34:10,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:34:10,399 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1805 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:34:10,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 2554 flow [2024-06-27 21:34:10,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 196 transitions, 2438 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:10,503 INFO L231 Difference]: Finished difference. Result has 137 places, 153 transitions, 1892 flow [2024-06-27 21:34:10,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1892, PETRI_PLACES=137, PETRI_TRANSITIONS=153} [2024-06-27 21:34:10,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 21:34:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 153 transitions, 1892 flow [2024-06-27 21:34:10,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:10,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:10,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:10,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:34:10,504 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash -506891308, now seen corresponding path program 8 times [2024-06-27 21:34:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:10,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681535275] [2024-06-27 21:34:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:13,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681535275] [2024-06-27 21:34:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681535275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:13,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530425374] [2024-06-27 21:34:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:13,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:13,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:13,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 153 transitions, 1892 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:13,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:14,875 INFO L124 PetriNetUnfolderBase]: 2209/3656 cut-off events. [2024-06-27 21:34:14,875 INFO L125 PetriNetUnfolderBase]: For 121011/121011 co-relation queries the response was YES. [2024-06-27 21:34:14,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23909 conditions, 3656 events. 2209/3656 cut-off events. For 121011/121011 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21780 event pairs, 593 based on Foata normal form. 16/3668 useless extension candidates. Maximal degree in co-relation 23848. Up to 3084 conditions per place. [2024-06-27 21:34:14,899 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-06-27 21:34:14,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 2519 flow [2024-06-27 21:34:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-27 21:34:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-27 21:34:14,901 INFO L175 Difference]: Start difference. First operand has 137 places, 153 transitions, 1892 flow. Second operand 11 states and 194 transitions. [2024-06-27 21:34:14,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 2519 flow [2024-06-27 21:34:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2319 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:34:15,008 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1860 flow [2024-06-27 21:34:15,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1860, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-27 21:34:15,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 21:34:15,008 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1860 flow [2024-06-27 21:34:15,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:15,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:15,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:34:15,009 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)] === [2024-06-27 21:34:15,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1267486873, now seen corresponding path program 2 times [2024-06-27 21:34:15,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:15,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771899827] [2024-06-27 21:34:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:16,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771899827] [2024-06-27 21:34:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771899827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:16,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:16,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28930277] [2024-06-27 21:34:16,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:16,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:16,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1860 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:16,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:16,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:16,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:18,040 INFO L124 PetriNetUnfolderBase]: 2203/3636 cut-off events. [2024-06-27 21:34:18,040 INFO L125 PetriNetUnfolderBase]: For 110017/110017 co-relation queries the response was YES. [2024-06-27 21:34:18,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23567 conditions, 3636 events. 2203/3636 cut-off events. For 110017/110017 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21625 event pairs, 567 based on Foata normal form. 2/3628 useless extension candidates. Maximal degree in co-relation 23505. Up to 3413 conditions per place. [2024-06-27 21:34:18,063 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 134 selfloop transitions, 29 changer transitions 0/168 dead transitions. [2024-06-27 21:34:18,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 168 transitions, 2244 flow [2024-06-27 21:34:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:34:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 21:34:18,064 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1860 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:34:18,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 168 transitions, 2244 flow [2024-06-27 21:34:18,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 2084 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-27 21:34:18,147 INFO L231 Difference]: Finished difference. Result has 137 places, 155 transitions, 1764 flow [2024-06-27 21:34:18,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1764, PETRI_PLACES=137, PETRI_TRANSITIONS=155} [2024-06-27 21:34:18,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 21:34:18,147 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 155 transitions, 1764 flow [2024-06-27 21:34:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:18,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:18,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:18,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:34:18,148 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)] === [2024-06-27 21:34:18,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1262732217, now seen corresponding path program 1 times [2024-06-27 21:34:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529968625] [2024-06-27 21:34:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:20,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:20,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529968625] [2024-06-27 21:34:20,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529968625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:20,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:20,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361757910] [2024-06-27 21:34:20,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:20,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:20,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:20,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 155 transitions, 1764 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:21,006 INFO L124 PetriNetUnfolderBase]: 2098/3545 cut-off events. [2024-06-27 21:34:21,006 INFO L125 PetriNetUnfolderBase]: For 100246/100246 co-relation queries the response was YES. [2024-06-27 21:34:21,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22198 conditions, 3545 events. 2098/3545 cut-off events. For 100246/100246 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21642 event pairs, 543 based on Foata normal form. 2/3540 useless extension candidates. Maximal degree in co-relation 22137. Up to 3328 conditions per place. [2024-06-27 21:34:21,027 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 154 selfloop transitions, 11 changer transitions 0/174 dead transitions. [2024-06-27 21:34:21,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 174 transitions, 2178 flow [2024-06-27 21:34:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 21:34:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:34:21,029 INFO L175 Difference]: Start difference. First operand has 137 places, 155 transitions, 1764 flow. Second operand 6 states and 106 transitions. [2024-06-27 21:34:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 174 transitions, 2178 flow [2024-06-27 21:34:21,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 174 transitions, 2110 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:21,116 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1764 flow [2024-06-27 21:34:21,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1764, PETRI_PLACES=139, PETRI_TRANSITIONS=158} [2024-06-27 21:34:21,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 21:34:21,116 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1764 flow [2024-06-27 21:34:21,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:21,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:21,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:21,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:34:21,117 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)] === [2024-06-27 21:34:21,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1267493817, now seen corresponding path program 2 times [2024-06-27 21:34:21,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:21,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46195030] [2024-06-27 21:34:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:21,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46195030] [2024-06-27 21:34:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46195030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:22,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:34:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139246697] [2024-06-27 21:34:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:22,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:34:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:34:22,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:34:22,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:22,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 158 transitions, 1764 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:22,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:22,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:22,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:23,735 INFO L124 PetriNetUnfolderBase]: 2092/3537 cut-off events. [2024-06-27 21:34:23,735 INFO L125 PetriNetUnfolderBase]: For 101437/101437 co-relation queries the response was YES. [2024-06-27 21:34:23,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22305 conditions, 3537 events. 2092/3537 cut-off events. For 101437/101437 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21647 event pairs, 542 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 22243. Up to 3321 conditions per place. [2024-06-27 21:34:23,761 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2024-06-27 21:34:23,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 174 transitions, 2172 flow [2024-06-27 21:34:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 21:34:23,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 21:34:23,763 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1764 flow. Second operand 6 states and 103 transitions. [2024-06-27 21:34:23,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 174 transitions, 2172 flow [2024-06-27 21:34:23,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 174 transitions, 2126 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:23,858 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1797 flow [2024-06-27 21:34:23,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1797, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-27 21:34:23,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 21:34:23,859 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1797 flow [2024-06-27 21:34:23,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:23,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:23,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:23,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:34:23,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:23,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1750662904, now seen corresponding path program 1 times [2024-06-27 21:34:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:23,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739083728] [2024-06-27 21:34:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:26,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:26,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739083728] [2024-06-27 21:34:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739083728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:26,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:26,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220736826] [2024-06-27 21:34:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:26,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:26,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:26,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1797 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:26,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:26,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:27,607 INFO L124 PetriNetUnfolderBase]: 2189/3626 cut-off events. [2024-06-27 21:34:27,607 INFO L125 PetriNetUnfolderBase]: For 118998/118998 co-relation queries the response was YES. [2024-06-27 21:34:27,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23236 conditions, 3626 events. 2189/3626 cut-off events. For 118998/118998 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21409 event pairs, 367 based on Foata normal form. 12/3637 useless extension candidates. Maximal degree in co-relation 23173. Up to 3111 conditions per place. [2024-06-27 21:34:27,635 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2024-06-27 21:34:27,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 205 transitions, 2285 flow [2024-06-27 21:34:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:34:27,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 21:34:27,637 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1797 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:34:27,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 205 transitions, 2285 flow [2024-06-27 21:34:27,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 2230 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:27,795 INFO L231 Difference]: Finished difference. Result has 145 places, 160 transitions, 1747 flow [2024-06-27 21:34:27,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1747, PETRI_PLACES=145, PETRI_TRANSITIONS=160} [2024-06-27 21:34:27,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 21:34:27,796 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 160 transitions, 1747 flow [2024-06-27 21:34:27,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-27 21:34:27,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:27,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:34:27,797 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)] === [2024-06-27 21:34:27,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 283126466, now seen corresponding path program 1 times [2024-06-27 21:34:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389132548] [2024-06-27 21:34:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389132548] [2024-06-27 21:34:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389132548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:29,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:29,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:29,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668595450] [2024-06-27 21:34:29,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:29,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:29,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:29,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:29,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 160 transitions, 1747 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:29,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:29,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:29,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:31,345 INFO L124 PetriNetUnfolderBase]: 2209/3651 cut-off events. [2024-06-27 21:34:31,346 INFO L125 PetriNetUnfolderBase]: For 119038/119038 co-relation queries the response was YES. [2024-06-27 21:34:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23613 conditions, 3651 events. 2209/3651 cut-off events. For 119038/119038 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21756 event pairs, 537 based on Foata normal form. 4/3654 useless extension candidates. Maximal degree in co-relation 23549. Up to 3368 conditions per place. [2024-06-27 21:34:31,377 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 151 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-06-27 21:34:31,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 192 transitions, 2385 flow [2024-06-27 21:34:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:34:31,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:34:31,378 INFO L175 Difference]: Start difference. First operand has 145 places, 160 transitions, 1747 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:34:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 192 transitions, 2385 flow [2024-06-27 21:34:31,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 192 transitions, 2238 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:31,502 INFO L231 Difference]: Finished difference. Result has 144 places, 166 transitions, 1772 flow [2024-06-27 21:34:31,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1772, PETRI_PLACES=144, PETRI_TRANSITIONS=166} [2024-06-27 21:34:31,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-27 21:34:31,503 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 166 transitions, 1772 flow [2024-06-27 21:34:31,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:31,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:34:31,504 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)] === [2024-06-27 21:34:31,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1168633736, now seen corresponding path program 2 times [2024-06-27 21:34:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183617316] [2024-06-27 21:34:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:33,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183617316] [2024-06-27 21:34:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183617316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93494492] [2024-06-27 21:34:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:33,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:33,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 166 transitions, 1772 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:33,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:33,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:33,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:34,959 INFO L124 PetriNetUnfolderBase]: 2229/3677 cut-off events. [2024-06-27 21:34:34,959 INFO L125 PetriNetUnfolderBase]: For 124029/124029 co-relation queries the response was YES. [2024-06-27 21:34:34,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23709 conditions, 3677 events. 2229/3677 cut-off events. For 124029/124029 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21924 event pairs, 542 based on Foata normal form. 4/3671 useless extension candidates. Maximal degree in co-relation 23645. Up to 3384 conditions per place. [2024-06-27 21:34:34,988 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 39 changer transitions 0/188 dead transitions. [2024-06-27 21:34:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 188 transitions, 2344 flow [2024-06-27 21:34:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:34:34,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:34:34,989 INFO L175 Difference]: Start difference. First operand has 144 places, 166 transitions, 1772 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:34:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 188 transitions, 2344 flow [2024-06-27 21:34:35,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 188 transitions, 2284 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:35,096 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1848 flow [2024-06-27 21:34:35,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1848, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-27 21:34:35,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 21:34:35,097 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1848 flow [2024-06-27 21:34:35,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:35,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:35,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:34:35,097 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)] === [2024-06-27 21:34:35,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 293315546, now seen corresponding path program 3 times [2024-06-27 21:34:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964569279] [2024-06-27 21:34:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964569279] [2024-06-27 21:34:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964569279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:37,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307334583] [2024-06-27 21:34:37,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:37,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:37,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:37,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1848 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:37,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:37,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:37,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:38,357 INFO L124 PetriNetUnfolderBase]: 2217/3673 cut-off events. [2024-06-27 21:34:38,357 INFO L125 PetriNetUnfolderBase]: For 121429/121429 co-relation queries the response was YES. [2024-06-27 21:34:38,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23534 conditions, 3673 events. 2217/3673 cut-off events. For 121429/121429 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21980 event pairs, 578 based on Foata normal form. 4/3676 useless extension candidates. Maximal degree in co-relation 23469. Up to 3500 conditions per place. [2024-06-27 21:34:38,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 165 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2024-06-27 21:34:38,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 184 transitions, 2258 flow [2024-06-27 21:34:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 21:34:38,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 21:34:38,382 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1848 flow. Second operand 7 states and 110 transitions. [2024-06-27 21:34:38,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 184 transitions, 2258 flow [2024-06-27 21:34:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 184 transitions, 2101 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:38,503 INFO L231 Difference]: Finished difference. Result has 149 places, 169 transitions, 1725 flow [2024-06-27 21:34:38,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=149, PETRI_TRANSITIONS=169} [2024-06-27 21:34:38,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 21:34:38,504 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 169 transitions, 1725 flow [2024-06-27 21:34:38,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:38,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:38,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:34:38,505 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)] === [2024-06-27 21:34:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash -124409617, now seen corresponding path program 1 times [2024-06-27 21:34:38,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562846713] [2024-06-27 21:34:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:38,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:40,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562846713] [2024-06-27 21:34:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562846713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:40,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427208016] [2024-06-27 21:34:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:40,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:40,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:40,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 169 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:40,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:40,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:40,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:41,678 INFO L124 PetriNetUnfolderBase]: 2137/3600 cut-off events. [2024-06-27 21:34:41,679 INFO L125 PetriNetUnfolderBase]: For 109042/109043 co-relation queries the response was YES. [2024-06-27 21:34:41,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22394 conditions, 3600 events. 2137/3600 cut-off events. For 109042/109043 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21988 event pairs, 528 based on Foata normal form. 3/3593 useless extension candidates. Maximal degree in co-relation 22328. Up to 3337 conditions per place. [2024-06-27 21:34:41,708 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 167 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2024-06-27 21:34:41,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 200 transitions, 2347 flow [2024-06-27 21:34:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:34:41,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 21:34:41,709 INFO L175 Difference]: Start difference. First operand has 149 places, 169 transitions, 1725 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:34:41,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 200 transitions, 2347 flow [2024-06-27 21:34:41,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 2284 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:41,822 INFO L231 Difference]: Finished difference. Result has 148 places, 175 transitions, 1810 flow [2024-06-27 21:34:41,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1810, PETRI_PLACES=148, PETRI_TRANSITIONS=175} [2024-06-27 21:34:41,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-27 21:34:41,823 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 175 transitions, 1810 flow [2024-06-27 21:34:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:41,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:41,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:41,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:34:41,824 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)] === [2024-06-27 21:34:41,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1487999385, now seen corresponding path program 2 times [2024-06-27 21:34:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:41,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810857140] [2024-06-27 21:34:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810857140] [2024-06-27 21:34:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810857140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822241911] [2024-06-27 21:34:44,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:44,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:44,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 175 transitions, 1810 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:44,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:44,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:44,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:45,589 INFO L124 PetriNetUnfolderBase]: 2108/3555 cut-off events. [2024-06-27 21:34:45,589 INFO L125 PetriNetUnfolderBase]: For 111603/111604 co-relation queries the response was YES. [2024-06-27 21:34:45,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22417 conditions, 3555 events. 2108/3555 cut-off events. For 111603/111604 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21709 event pairs, 528 based on Foata normal form. 3/3551 useless extension candidates. Maximal degree in co-relation 22352. Up to 3330 conditions per place. [2024-06-27 21:34:45,612 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2024-06-27 21:34:45,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 2288 flow [2024-06-27 21:34:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:34:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:34:45,613 INFO L175 Difference]: Start difference. First operand has 148 places, 175 transitions, 1810 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:34:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 2288 flow [2024-06-27 21:34:45,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 196 transitions, 2229 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:45,703 INFO L231 Difference]: Finished difference. Result has 152 places, 178 transitions, 1841 flow [2024-06-27 21:34:45,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1841, PETRI_PLACES=152, PETRI_TRANSITIONS=178} [2024-06-27 21:34:45,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 21:34:45,704 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 178 transitions, 1841 flow [2024-06-27 21:34:45,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:45,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:45,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:45,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:34:45,705 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)] === [2024-06-27 21:34:45,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 599746043, now seen corresponding path program 3 times [2024-06-27 21:34:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:45,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027688236] [2024-06-27 21:34:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:45,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:47,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027688236] [2024-06-27 21:34:47,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027688236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:47,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:47,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:47,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92055561] [2024-06-27 21:34:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:47,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:47,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:34:47,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 1841 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:47,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:47,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:34:47,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:48,868 INFO L124 PetriNetUnfolderBase]: 2123/3573 cut-off events. [2024-06-27 21:34:48,868 INFO L125 PetriNetUnfolderBase]: For 116500/116501 co-relation queries the response was YES. [2024-06-27 21:34:48,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22856 conditions, 3573 events. 2123/3573 cut-off events. For 116500/116501 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21778 event pairs, 525 based on Foata normal form. 4/3570 useless extension candidates. Maximal degree in co-relation 22789. Up to 3352 conditions per place. [2024-06-27 21:34:48,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2024-06-27 21:34:48,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 201 transitions, 2344 flow [2024-06-27 21:34:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:34:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 21:34:48,897 INFO L175 Difference]: Start difference. First operand has 152 places, 178 transitions, 1841 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:34:48,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 201 transitions, 2344 flow [2024-06-27 21:34:49,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 201 transitions, 2276 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:49,026 INFO L231 Difference]: Finished difference. Result has 156 places, 187 transitions, 1919 flow [2024-06-27 21:34:49,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1919, PETRI_PLACES=156, PETRI_TRANSITIONS=187} [2024-06-27 21:34:49,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-27 21:34:49,027 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 187 transitions, 1919 flow [2024-06-27 21:34:49,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:49,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:49,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:34:49,027 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)] === [2024-06-27 21:34:49,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash 637820096, now seen corresponding path program 1 times [2024-06-27 21:34:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:49,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888838159] [2024-06-27 21:34:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888838159] [2024-06-27 21:34:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888838159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:51,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993189859] [2024-06-27 21:34:51,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:52,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:52,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 187 transitions, 1919 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:52,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:52,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:53,281 INFO L124 PetriNetUnfolderBase]: 2246/3710 cut-off events. [2024-06-27 21:34:53,281 INFO L125 PetriNetUnfolderBase]: For 136523/136523 co-relation queries the response was YES. [2024-06-27 21:34:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24455 conditions, 3710 events. 2246/3710 cut-off events. For 136523/136523 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22066 event pairs, 584 based on Foata normal form. 2/3711 useless extension candidates. Maximal degree in co-relation 24385. Up to 3551 conditions per place. [2024-06-27 21:34:53,309 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 182 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2024-06-27 21:34:53,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 202 transitions, 2385 flow [2024-06-27 21:34:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 21:34:53,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-27 21:34:53,311 INFO L175 Difference]: Start difference. First operand has 156 places, 187 transitions, 1919 flow. Second operand 7 states and 108 transitions. [2024-06-27 21:34:53,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 202 transitions, 2385 flow [2024-06-27 21:34:53,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 202 transitions, 2332 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 21:34:53,443 INFO L231 Difference]: Finished difference. Result has 160 places, 189 transitions, 1939 flow [2024-06-27 21:34:53,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1939, PETRI_PLACES=160, PETRI_TRANSITIONS=189} [2024-06-27 21:34:53,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 21:34:53,444 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 189 transitions, 1939 flow [2024-06-27 21:34:53,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:53,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:53,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:53,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:34:53,445 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)] === [2024-06-27 21:34:53,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 182219448, now seen corresponding path program 1 times [2024-06-27 21:34:53,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:53,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901273883] [2024-06-27 21:34:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:53,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901273883] [2024-06-27 21:34:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901273883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:55,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791244644] [2024-06-27 21:34:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:55,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:55,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:55,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 189 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:55,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:55,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:56,751 INFO L124 PetriNetUnfolderBase]: 2256/3729 cut-off events. [2024-06-27 21:34:56,752 INFO L125 PetriNetUnfolderBase]: For 141121/141121 co-relation queries the response was YES. [2024-06-27 21:34:56,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24670 conditions, 3729 events. 2256/3729 cut-off events. For 141121/141121 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22232 event pairs, 571 based on Foata normal form. 2/3730 useless extension candidates. Maximal degree in co-relation 24599. Up to 3520 conditions per place. [2024-06-27 21:34:56,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 20 changer transitions 0/216 dead transitions. [2024-06-27 21:34:56,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 2497 flow [2024-06-27 21:34:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:34:56,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 21:34:56,777 INFO L175 Difference]: Start difference. First operand has 160 places, 189 transitions, 1939 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:34:56,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 2497 flow [2024-06-27 21:34:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 216 transitions, 2440 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:56,906 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2002 flow [2024-06-27 21:34:56,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2002, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2024-06-27 21:34:56,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 21:34:56,907 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2002 flow [2024-06-27 21:34:56,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:56,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:56,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:34:56,907 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)] === [2024-06-27 21:34:56,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1265510646, now seen corresponding path program 2 times [2024-06-27 21:34:56,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:56,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361521949] [2024-06-27 21:34:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:56,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:58,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:58,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361521949] [2024-06-27 21:34:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361521949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:58,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:34:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922674016] [2024-06-27 21:34:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:58,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:34:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:34:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:34:58,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:34:58,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2002 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:58,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:58,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:34:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:00,327 INFO L124 PetriNetUnfolderBase]: 2266/3738 cut-off events. [2024-06-27 21:35:00,327 INFO L125 PetriNetUnfolderBase]: For 148106/148106 co-relation queries the response was YES. [2024-06-27 21:35:00,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25295 conditions, 3738 events. 2266/3738 cut-off events. For 148106/148106 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22274 event pairs, 534 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 25223. Up to 3491 conditions per place. [2024-06-27 21:35:00,356 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 32 changer transitions 0/218 dead transitions. [2024-06-27 21:35:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 218 transitions, 2586 flow [2024-06-27 21:35:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:35:00,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:35:00,358 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2002 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:35:00,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 218 transitions, 2586 flow [2024-06-27 21:35:00,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 218 transitions, 2496 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:00,530 INFO L231 Difference]: Finished difference. Result has 164 places, 196 transitions, 2046 flow [2024-06-27 21:35:00,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=164, PETRI_TRANSITIONS=196} [2024-06-27 21:35:00,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 21:35:00,530 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 196 transitions, 2046 flow [2024-06-27 21:35:00,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:00,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:00,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:35:00,531 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)] === [2024-06-27 21:35:00,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2001458504, now seen corresponding path program 3 times [2024-06-27 21:35:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:00,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662987678] [2024-06-27 21:35:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:02,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662987678] [2024-06-27 21:35:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662987678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:02,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:02,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262245058] [2024-06-27 21:35:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:02,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:02,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 196 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:02,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:02,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:02,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:03,886 INFO L124 PetriNetUnfolderBase]: 2276/3754 cut-off events. [2024-06-27 21:35:03,886 INFO L125 PetriNetUnfolderBase]: For 155181/155181 co-relation queries the response was YES. [2024-06-27 21:35:03,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25835 conditions, 3754 events. 2276/3754 cut-off events. For 155181/155181 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22384 event pairs, 578 based on Foata normal form. 2/3752 useless extension candidates. Maximal degree in co-relation 25762. Up to 3515 conditions per place. [2024-06-27 21:35:03,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-27 21:35:03,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2618 flow [2024-06-27 21:35:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:35:03,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 21:35:03,917 INFO L175 Difference]: Start difference. First operand has 164 places, 196 transitions, 2046 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:35:03,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2618 flow [2024-06-27 21:35:04,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2516 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:04,069 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2092 flow [2024-06-27 21:35:04,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2092, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-06-27 21:35:04,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 21:35:04,070 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2092 flow [2024-06-27 21:35:04,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:04,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:04,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:04,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:35:04,070 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)] === [2024-06-27 21:35:04,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:04,070 INFO L85 PathProgramCache]: Analyzing trace with hash -260170320, now seen corresponding path program 4 times [2024-06-27 21:35:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:04,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711328740] [2024-06-27 21:35:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:04,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:06,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711328740] [2024-06-27 21:35:06,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711328740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:06,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:06,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929421132] [2024-06-27 21:35:06,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:06,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:06,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:06,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:06,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2092 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:06,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:06,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:07,365 INFO L124 PetriNetUnfolderBase]: 2281/3763 cut-off events. [2024-06-27 21:35:07,366 INFO L125 PetriNetUnfolderBase]: For 161447/161447 co-relation queries the response was YES. [2024-06-27 21:35:07,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26351 conditions, 3763 events. 2281/3763 cut-off events. For 161447/161447 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22489 event pairs, 578 based on Foata normal form. 1/3760 useless extension candidates. Maximal degree in co-relation 26277. Up to 3510 conditions per place. [2024-06-27 21:35:07,402 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 36 changer transitions 0/222 dead transitions. [2024-06-27 21:35:07,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 2650 flow [2024-06-27 21:35:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:35:07,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 21:35:07,404 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2092 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:35:07,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 2650 flow [2024-06-27 21:35:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 222 transitions, 2532 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:07,585 INFO L231 Difference]: Finished difference. Result has 169 places, 206 transitions, 2152 flow [2024-06-27 21:35:07,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2152, PETRI_PLACES=169, PETRI_TRANSITIONS=206} [2024-06-27 21:35:07,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 21:35:07,586 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 206 transitions, 2152 flow [2024-06-27 21:35:07,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:07,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:07,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:07,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:35:07,587 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)] === [2024-06-27 21:35:07,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1709100360, now seen corresponding path program 5 times [2024-06-27 21:35:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708702617] [2024-06-27 21:35:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:09,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:09,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708702617] [2024-06-27 21:35:09,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708702617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:09,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:09,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:09,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393801658] [2024-06-27 21:35:09,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:09,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:09,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:09,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 206 transitions, 2152 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:09,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:09,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:09,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:10,572 INFO L124 PetriNetUnfolderBase]: 2299/3778 cut-off events. [2024-06-27 21:35:10,573 INFO L125 PetriNetUnfolderBase]: For 170354/170354 co-relation queries the response was YES. [2024-06-27 21:35:10,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26957 conditions, 3778 events. 2299/3778 cut-off events. For 170354/170354 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22547 event pairs, 537 based on Foata normal form. 2/3770 useless extension candidates. Maximal degree in co-relation 26881. Up to 3517 conditions per place. [2024-06-27 21:35:10,605 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-27 21:35:10,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 2952 flow [2024-06-27 21:35:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:35:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:35:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 21:35:10,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 21:35:10,606 INFO L175 Difference]: Start difference. First operand has 169 places, 206 transitions, 2152 flow. Second operand 7 states and 115 transitions. [2024-06-27 21:35:10,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 2952 flow [2024-06-27 21:35:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 230 transitions, 2874 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:10,786 INFO L231 Difference]: Finished difference. Result has 174 places, 214 transitions, 2343 flow [2024-06-27 21:35:10,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2343, PETRI_PLACES=174, PETRI_TRANSITIONS=214} [2024-06-27 21:35:10,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 21:35:10,786 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 214 transitions, 2343 flow [2024-06-27 21:35:10,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:10,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:10,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:10,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:35:10,787 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)] === [2024-06-27 21:35:10,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1715766600, now seen corresponding path program 6 times [2024-06-27 21:35:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:10,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680346659] [2024-06-27 21:35:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:10,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:13,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:13,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680346659] [2024-06-27 21:35:13,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680346659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:13,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:35:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399316591] [2024-06-27 21:35:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:35:13,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:35:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:35:13,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:13,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 214 transitions, 2343 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:13,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:13,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:14,496 INFO L124 PetriNetUnfolderBase]: 2433/3978 cut-off events. [2024-06-27 21:35:14,496 INFO L125 PetriNetUnfolderBase]: For 204433/204433 co-relation queries the response was YES. [2024-06-27 21:35:14,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30115 conditions, 3978 events. 2433/3978 cut-off events. For 204433/204433 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23624 event pairs, 527 based on Foata normal form. 2/3970 useless extension candidates. Maximal degree in co-relation 30036. Up to 3432 conditions per place. [2024-06-27 21:35:14,534 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 74 changer transitions 0/252 dead transitions. [2024-06-27 21:35:14,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 252 transitions, 3297 flow [2024-06-27 21:35:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:35:14,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 21:35:14,535 INFO L175 Difference]: Start difference. First operand has 174 places, 214 transitions, 2343 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:35:14,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 252 transitions, 3297 flow [2024-06-27 21:35:14,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 252 transitions, 3137 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 21:35:14,777 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 2635 flow [2024-06-27 21:35:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2635, PETRI_PLACES=180, PETRI_TRANSITIONS=227} [2024-06-27 21:35:14,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 21:35:14,778 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 2635 flow [2024-06-27 21:35:14,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:14,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:14,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:14,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:35:14,778 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)] === [2024-06-27 21:35:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash 438268362, now seen corresponding path program 1 times [2024-06-27 21:35:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769648847] [2024-06-27 21:35:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:17,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769648847] [2024-06-27 21:35:17,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769648847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:17,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:17,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075108643] [2024-06-27 21:35:17,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:17,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:35:17,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 227 transitions, 2635 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:17,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:17,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:35:17,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:18,697 INFO L124 PetriNetUnfolderBase]: 2441/4053 cut-off events. [2024-06-27 21:35:18,697 INFO L125 PetriNetUnfolderBase]: For 238779/238801 co-relation queries the response was YES. [2024-06-27 21:35:18,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32367 conditions, 4053 events. 2441/4053 cut-off events. For 238779/238801 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24625 event pairs, 587 based on Foata normal form. 14/4060 useless extension candidates. Maximal degree in co-relation 32285. Up to 3586 conditions per place. [2024-06-27 21:35:18,734 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 38 changer transitions 0/268 dead transitions. [2024-06-27 21:35:18,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 268 transitions, 3548 flow [2024-06-27 21:35:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 21:35:18,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:35:18,735 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 2635 flow. Second operand 8 states and 152 transitions. [2024-06-27 21:35:18,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 268 transitions, 3548 flow [2024-06-27 21:35:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 268 transitions, 3490 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:19,014 INFO L231 Difference]: Finished difference. Result has 184 places, 229 transitions, 2705 flow [2024-06-27 21:35:19,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=184, PETRI_TRANSITIONS=229} [2024-06-27 21:35:19,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 21:35:19,015 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 229 transitions, 2705 flow [2024-06-27 21:35:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:19,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:19,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:35:19,016 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)] === [2024-06-27 21:35:19,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 438271152, now seen corresponding path program 2 times [2024-06-27 21:35:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741046366] [2024-06-27 21:35:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741046366] [2024-06-27 21:35:21,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741046366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:21,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:21,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435812664] [2024-06-27 21:35:21,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:21,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:21,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:35:21,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 229 transitions, 2705 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:21,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:21,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:35:21,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:23,062 INFO L124 PetriNetUnfolderBase]: 2489/4113 cut-off events. [2024-06-27 21:35:23,062 INFO L125 PetriNetUnfolderBase]: For 250488/250510 co-relation queries the response was YES. [2024-06-27 21:35:23,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33158 conditions, 4113 events. 2489/4113 cut-off events. For 250488/250510 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24992 event pairs, 628 based on Foata normal form. 15/4122 useless extension candidates. Maximal degree in co-relation 33074. Up to 3748 conditions per place. [2024-06-27 21:35:23,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 36 changer transitions 0/261 dead transitions. [2024-06-27 21:35:23,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 261 transitions, 3450 flow [2024-06-27 21:35:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:35:23,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 21:35:23,099 INFO L175 Difference]: Start difference. First operand has 184 places, 229 transitions, 2705 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:35:23,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 261 transitions, 3450 flow [2024-06-27 21:35:23,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 261 transitions, 3396 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:23,361 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2754 flow [2024-06-27 21:35:23,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2754, PETRI_PLACES=188, PETRI_TRANSITIONS=230} [2024-06-27 21:35:23,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-27 21:35:23,362 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2754 flow [2024-06-27 21:35:23,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:23,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:23,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:35:23,363 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)] === [2024-06-27 21:35:23,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1990021736, now seen corresponding path program 3 times [2024-06-27 21:35:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:23,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188374675] [2024-06-27 21:35:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:26,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188374675] [2024-06-27 21:35:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188374675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:26,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:26,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948291562] [2024-06-27 21:35:26,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:26,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:26,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:26,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:26,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:26,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:35:26,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 230 transitions, 2754 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:26,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:26,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:35:26,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:28,058 INFO L124 PetriNetUnfolderBase]: 2505/4140 cut-off events. [2024-06-27 21:35:28,059 INFO L125 PetriNetUnfolderBase]: For 254586/254605 co-relation queries the response was YES. [2024-06-27 21:35:28,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33340 conditions, 4140 events. 2505/4140 cut-off events. For 254586/254605 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25212 event pairs, 624 based on Foata normal form. 16/4153 useless extension candidates. Maximal degree in co-relation 33254. Up to 3808 conditions per place. [2024-06-27 21:35:28,096 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 18 changer transitions 0/256 dead transitions. [2024-06-27 21:35:28,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 256 transitions, 3396 flow [2024-06-27 21:35:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:35:28,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:35:28,097 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2754 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:35:28,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 256 transitions, 3396 flow [2024-06-27 21:35:28,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 256 transitions, 3319 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:28,410 INFO L231 Difference]: Finished difference. Result has 190 places, 232 transitions, 2782 flow [2024-06-27 21:35:28,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2782, PETRI_PLACES=190, PETRI_TRANSITIONS=232} [2024-06-27 21:35:28,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 21:35:28,411 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 232 transitions, 2782 flow [2024-06-27 21:35:28,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:28,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:28,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:35:28,411 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)] === [2024-06-27 21:35:28,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1709091432, now seen corresponding path program 4 times [2024-06-27 21:35:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561444138] [2024-06-27 21:35:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:30,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:30,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561444138] [2024-06-27 21:35:30,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561444138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:30,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:30,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277042823] [2024-06-27 21:35:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:30,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:30,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:30,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:35:30,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 232 transitions, 2782 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:30,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:30,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:35:30,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:32,244 INFO L124 PetriNetUnfolderBase]: 2496/4132 cut-off events. [2024-06-27 21:35:32,244 INFO L125 PetriNetUnfolderBase]: For 248747/248770 co-relation queries the response was YES. [2024-06-27 21:35:32,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33072 conditions, 4132 events. 2496/4132 cut-off events. For 248747/248770 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25160 event pairs, 614 based on Foata normal form. 15/4144 useless extension candidates. Maximal degree in co-relation 32985. Up to 3761 conditions per place. [2024-06-27 21:35:32,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 39 changer transitions 0/265 dead transitions. [2024-06-27 21:35:32,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 265 transitions, 3665 flow [2024-06-27 21:35:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:35:32,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:35:32,286 INFO L175 Difference]: Start difference. First operand has 190 places, 232 transitions, 2782 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:35:32,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 265 transitions, 3665 flow [2024-06-27 21:35:32,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 265 transitions, 3568 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:32,671 INFO L231 Difference]: Finished difference. Result has 195 places, 241 transitions, 2999 flow [2024-06-27 21:35:32,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2999, PETRI_PLACES=195, PETRI_TRANSITIONS=241} [2024-06-27 21:35:32,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 21:35:32,672 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 241 transitions, 2999 flow [2024-06-27 21:35:32,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:32,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:32,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:32,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:35:32,672 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)] === [2024-06-27 21:35:32,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1958566510, now seen corresponding path program 1 times [2024-06-27 21:35:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:32,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443134196] [2024-06-27 21:35:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:35,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:35,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443134196] [2024-06-27 21:35:35,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443134196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:35,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:35,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195016556] [2024-06-27 21:35:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:35,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:35,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 241 transitions, 2999 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:35,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:35,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:36,405 INFO L124 PetriNetUnfolderBase]: 2612/4274 cut-off events. [2024-06-27 21:35:36,405 INFO L125 PetriNetUnfolderBase]: For 247613/247613 co-relation queries the response was YES. [2024-06-27 21:35:36,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34616 conditions, 4274 events. 2612/4274 cut-off events. For 247613/247613 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25662 event pairs, 638 based on Foata normal form. 1/4274 useless extension candidates. Maximal degree in co-relation 34526. Up to 4029 conditions per place. [2024-06-27 21:35:36,444 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 248 selfloop transitions, 34 changer transitions 0/287 dead transitions. [2024-06-27 21:35:36,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 4039 flow [2024-06-27 21:35:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:35:36,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:35:36,450 INFO L175 Difference]: Start difference. First operand has 195 places, 241 transitions, 2999 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:35:36,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 4039 flow [2024-06-27 21:35:36,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 287 transitions, 3948 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:36,805 INFO L231 Difference]: Finished difference. Result has 198 places, 258 transitions, 3310 flow [2024-06-27 21:35:36,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3310, PETRI_PLACES=198, PETRI_TRANSITIONS=258} [2024-06-27 21:35:36,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 21:35:36,806 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 258 transitions, 3310 flow [2024-06-27 21:35:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:36,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:36,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:35:36,807 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)] === [2024-06-27 21:35:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1353837699, now seen corresponding path program 1 times [2024-06-27 21:35:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113072961] [2024-06-27 21:35:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:39,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:39,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113072961] [2024-06-27 21:35:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113072961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:39,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:39,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253629312] [2024-06-27 21:35:39,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:39,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:39,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:39,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 258 transitions, 3310 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:40,589 INFO L124 PetriNetUnfolderBase]: 2632/4300 cut-off events. [2024-06-27 21:35:40,589 INFO L125 PetriNetUnfolderBase]: For 255609/255609 co-relation queries the response was YES. [2024-06-27 21:35:40,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35321 conditions, 4300 events. 2632/4300 cut-off events. For 255609/255609 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25822 event pairs, 636 based on Foata normal form. 4/4303 useless extension candidates. Maximal degree in co-relation 35228. Up to 4065 conditions per place. [2024-06-27 21:35:40,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 258 selfloop transitions, 24 changer transitions 0/287 dead transitions. [2024-06-27 21:35:40,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 287 transitions, 4072 flow [2024-06-27 21:35:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:35:40,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:35:40,630 INFO L175 Difference]: Start difference. First operand has 198 places, 258 transitions, 3310 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:35:40,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 287 transitions, 4072 flow [2024-06-27 21:35:41,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 287 transitions, 3932 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-27 21:35:41,027 INFO L231 Difference]: Finished difference. Result has 204 places, 262 transitions, 3349 flow [2024-06-27 21:35:41,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3349, PETRI_PLACES=204, PETRI_TRANSITIONS=262} [2024-06-27 21:35:41,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 21:35:41,027 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 262 transitions, 3349 flow [2024-06-27 21:35:41,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:41,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:41,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:41,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:35:41,028 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)] === [2024-06-27 21:35:41,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1329776748, now seen corresponding path program 2 times [2024-06-27 21:35:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:41,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048807459] [2024-06-27 21:35:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:44,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:44,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048807459] [2024-06-27 21:35:44,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048807459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:44,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:44,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:44,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049422966] [2024-06-27 21:35:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:44,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:44,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 262 transitions, 3349 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:44,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:44,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:44,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:45,760 INFO L124 PetriNetUnfolderBase]: 2642/4314 cut-off events. [2024-06-27 21:35:45,760 INFO L125 PetriNetUnfolderBase]: For 263275/263275 co-relation queries the response was YES. [2024-06-27 21:35:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35970 conditions, 4314 events. 2642/4314 cut-off events. For 263275/263275 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25904 event pairs, 636 based on Foata normal form. 2/4315 useless extension candidates. Maximal degree in co-relation 35875. Up to 4085 conditions per place. [2024-06-27 21:35:45,803 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 24 changer transitions 0/290 dead transitions. [2024-06-27 21:35:45,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 290 transitions, 4099 flow [2024-06-27 21:35:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:35:45,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:35:45,805 INFO L175 Difference]: Start difference. First operand has 204 places, 262 transitions, 3349 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:35:45,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 290 transitions, 4099 flow [2024-06-27 21:35:46,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 290 transitions, 3912 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:46,142 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 3331 flow [2024-06-27 21:35:46,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-06-27 21:35:46,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 21:35:46,143 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 3331 flow [2024-06-27 21:35:46,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:46,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:46,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:35:46,143 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)] === [2024-06-27 21:35:46,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1501654689, now seen corresponding path program 2 times [2024-06-27 21:35:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:46,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859682561] [2024-06-27 21:35:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:46,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:48,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859682561] [2024-06-27 21:35:48,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859682561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:48,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:48,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:48,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375800652] [2024-06-27 21:35:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:48,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:48,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:48,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 3331 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:48,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:48,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:48,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:49,896 INFO L124 PetriNetUnfolderBase]: 2677/4364 cut-off events. [2024-06-27 21:35:49,896 INFO L125 PetriNetUnfolderBase]: For 284281/284281 co-relation queries the response was YES. [2024-06-27 21:35:49,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 4364 events. 2677/4364 cut-off events. For 284281/284281 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26239 event pairs, 603 based on Foata normal form. 7/4370 useless extension candidates. Maximal degree in co-relation 36908. Up to 4024 conditions per place. [2024-06-27 21:35:49,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 50 changer transitions 0/301 dead transitions. [2024-06-27 21:35:49,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 301 transitions, 4317 flow [2024-06-27 21:35:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:35:49,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:35:49,947 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 3331 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:35:49,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 301 transitions, 4317 flow [2024-06-27 21:35:50,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 301 transitions, 4176 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:50,338 INFO L231 Difference]: Finished difference. Result has 208 places, 272 transitions, 3498 flow [2024-06-27 21:35:50,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3498, PETRI_PLACES=208, PETRI_TRANSITIONS=272} [2024-06-27 21:35:50,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 21:35:50,339 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 272 transitions, 3498 flow [2024-06-27 21:35:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:50,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:50,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:35:50,339 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)] === [2024-06-27 21:35:50,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1597656146, now seen corresponding path program 3 times [2024-06-27 21:35:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837212543] [2024-06-27 21:35:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:52,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837212543] [2024-06-27 21:35:52,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837212543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:52,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459132225] [2024-06-27 21:35:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:52,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:52,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:52,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 272 transitions, 3498 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:52,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:52,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:52,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:54,324 INFO L124 PetriNetUnfolderBase]: 2716/4417 cut-off events. [2024-06-27 21:35:54,324 INFO L125 PetriNetUnfolderBase]: For 293623/293623 co-relation queries the response was YES. [2024-06-27 21:35:54,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38403 conditions, 4417 events. 2716/4417 cut-off events. For 293623/293623 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26550 event pairs, 599 based on Foata normal form. 2/4418 useless extension candidates. Maximal degree in co-relation 38306. Up to 4128 conditions per place. [2024-06-27 21:35:54,372 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 249 selfloop transitions, 53 changer transitions 0/307 dead transitions. [2024-06-27 21:35:54,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 307 transitions, 4569 flow [2024-06-27 21:35:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:35:54,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:35:54,373 INFO L175 Difference]: Start difference. First operand has 208 places, 272 transitions, 3498 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:35:54,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 307 transitions, 4569 flow [2024-06-27 21:35:54,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 307 transitions, 4360 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:54,805 INFO L231 Difference]: Finished difference. Result has 212 places, 283 transitions, 3715 flow [2024-06-27 21:35:54,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3715, PETRI_PLACES=212, PETRI_TRANSITIONS=283} [2024-06-27 21:35:54,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 21:35:54,806 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 283 transitions, 3715 flow [2024-06-27 21:35:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:54,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:54,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:54,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:35:54,807 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)] === [2024-06-27 21:35:54,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:54,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1597655991, now seen corresponding path program 3 times [2024-06-27 21:35:54,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:54,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024455961] [2024-06-27 21:35:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:54,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:56,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024455961] [2024-06-27 21:35:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024455961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:56,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:56,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:56,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976850305] [2024-06-27 21:35:56,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:56,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:35:56,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 283 transitions, 3715 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:56,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:56,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:35:56,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:58,432 INFO L124 PetriNetUnfolderBase]: 2730/4441 cut-off events. [2024-06-27 21:35:58,432 INFO L125 PetriNetUnfolderBase]: For 312219/312219 co-relation queries the response was YES. [2024-06-27 21:35:58,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39134 conditions, 4441 events. 2730/4441 cut-off events. For 312219/312219 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26720 event pairs, 599 based on Foata normal form. 5/4445 useless extension candidates. Maximal degree in co-relation 39035. Up to 4106 conditions per place. [2024-06-27 21:35:58,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 57 changer transitions 0/329 dead transitions. [2024-06-27 21:35:58,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 329 transitions, 4904 flow [2024-06-27 21:35:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:35:58,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:35:58,476 INFO L175 Difference]: Start difference. First operand has 212 places, 283 transitions, 3715 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:35:58,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 329 transitions, 4904 flow [2024-06-27 21:35:58,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 329 transitions, 4700 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:58,879 INFO L231 Difference]: Finished difference. Result has 219 places, 300 transitions, 4026 flow [2024-06-27 21:35:58,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4026, PETRI_PLACES=219, PETRI_TRANSITIONS=300} [2024-06-27 21:35:58,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 21:35:58,880 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 300 transitions, 4026 flow [2024-06-27 21:35:58,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:58,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:58,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:58,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:35:58,881 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)] === [2024-06-27 21:35:58,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1477601829, now seen corresponding path program 1 times [2024-06-27 21:35:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:58,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633142717] [2024-06-27 21:35:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:58,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633142717] [2024-06-27 21:36:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633142717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:02,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341723241] [2024-06-27 21:36:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:02,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:02,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 300 transitions, 4026 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:02,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:02,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:02,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:04,281 INFO L124 PetriNetUnfolderBase]: 2774/4513 cut-off events. [2024-06-27 21:36:04,281 INFO L125 PetriNetUnfolderBase]: For 338330/338330 co-relation queries the response was YES. [2024-06-27 21:36:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 4513 events. 2774/4513 cut-off events. For 338330/338330 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27212 event pairs, 598 based on Foata normal form. 12/4524 useless extension candidates. Maximal degree in co-relation 40386. Up to 4142 conditions per place. [2024-06-27 21:36:04,331 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 274 selfloop transitions, 51 changer transitions 0/330 dead transitions. [2024-06-27 21:36:04,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 330 transitions, 4940 flow [2024-06-27 21:36:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:36:04,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 21:36:04,333 INFO L175 Difference]: Start difference. First operand has 219 places, 300 transitions, 4026 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:36:04,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 330 transitions, 4940 flow [2024-06-27 21:36:04,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 330 transitions, 4767 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:04,877 INFO L231 Difference]: Finished difference. Result has 224 places, 301 transitions, 3982 flow [2024-06-27 21:36:04,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3982, PETRI_PLACES=224, PETRI_TRANSITIONS=301} [2024-06-27 21:36:04,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 21:36:04,878 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 301 transitions, 3982 flow [2024-06-27 21:36:04,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:04,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:04,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:04,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:36:04,878 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)] === [2024-06-27 21:36:04,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1843689436, now seen corresponding path program 4 times [2024-06-27 21:36:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:04,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595310469] [2024-06-27 21:36:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595310469] [2024-06-27 21:36:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595310469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:07,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:07,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848079649] [2024-06-27 21:36:07,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:07,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:07,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:07,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:07,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 301 transitions, 3982 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:07,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:07,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:07,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:08,657 INFO L124 PetriNetUnfolderBase]: 2787/4525 cut-off events. [2024-06-27 21:36:08,658 INFO L125 PetriNetUnfolderBase]: For 327392/327392 co-relation queries the response was YES. [2024-06-27 21:36:08,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40740 conditions, 4525 events. 2787/4525 cut-off events. For 327392/327392 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27240 event pairs, 645 based on Foata normal form. 1/4522 useless extension candidates. Maximal degree in co-relation 40635. Up to 4255 conditions per place. [2024-06-27 21:36:08,711 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 44 changer transitions 0/334 dead transitions. [2024-06-27 21:36:08,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 334 transitions, 5023 flow [2024-06-27 21:36:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:36:08,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:36:08,713 INFO L175 Difference]: Start difference. First operand has 224 places, 301 transitions, 3982 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:36:08,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 334 transitions, 5023 flow [2024-06-27 21:36:09,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 334 transitions, 4919 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:09,280 INFO L231 Difference]: Finished difference. Result has 227 places, 308 transitions, 4169 flow [2024-06-27 21:36:09,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3878, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4169, PETRI_PLACES=227, PETRI_TRANSITIONS=308} [2024-06-27 21:36:09,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 21:36:09,281 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 308 transitions, 4169 flow [2024-06-27 21:36:09,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:09,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:09,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:36:09,282 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)] === [2024-06-27 21:36:09,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 433657778, now seen corresponding path program 5 times [2024-06-27 21:36:09,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99455259] [2024-06-27 21:36:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99455259] [2024-06-27 21:36:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99455259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656414668] [2024-06-27 21:36:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:12,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:12,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 308 transitions, 4169 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:12,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:12,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:12,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:13,611 INFO L124 PetriNetUnfolderBase]: 2797/4541 cut-off events. [2024-06-27 21:36:13,612 INFO L125 PetriNetUnfolderBase]: For 341953/341953 co-relation queries the response was YES. [2024-06-27 21:36:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41362 conditions, 4541 events. 2797/4541 cut-off events. For 341953/341953 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27336 event pairs, 646 based on Foata normal form. 2/4539 useless extension candidates. Maximal degree in co-relation 41255. Up to 4276 conditions per place. [2024-06-27 21:36:13,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 31 changer transitions 0/333 dead transitions. [2024-06-27 21:36:13,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 333 transitions, 5023 flow [2024-06-27 21:36:13,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:13,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:36:13,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:36:13,668 INFO L175 Difference]: Start difference. First operand has 227 places, 308 transitions, 4169 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:36:13,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 333 transitions, 5023 flow [2024-06-27 21:36:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 333 transitions, 4886 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-27 21:36:14,227 INFO L231 Difference]: Finished difference. Result has 233 places, 312 transitions, 4241 flow [2024-06-27 21:36:14,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4241, PETRI_PLACES=233, PETRI_TRANSITIONS=312} [2024-06-27 21:36:14,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 21:36:14,228 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 312 transitions, 4241 flow [2024-06-27 21:36:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:14,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:14,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:14,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:36:14,229 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)] === [2024-06-27 21:36:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1648217338, now seen corresponding path program 6 times [2024-06-27 21:36:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:14,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754938414] [2024-06-27 21:36:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754938414] [2024-06-27 21:36:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754938414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:16,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:16,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983101800] [2024-06-27 21:36:16,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:16,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:16,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 312 transitions, 4241 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:16,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:16,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:16,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:18,242 INFO L124 PetriNetUnfolderBase]: 2810/4563 cut-off events. [2024-06-27 21:36:18,243 INFO L125 PetriNetUnfolderBase]: For 357664/357664 co-relation queries the response was YES. [2024-06-27 21:36:18,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42368 conditions, 4563 events. 2810/4563 cut-off events. For 357664/357664 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27537 event pairs, 641 based on Foata normal form. 1/4560 useless extension candidates. Maximal degree in co-relation 42259. Up to 4229 conditions per place. [2024-06-27 21:36:18,291 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 68 changer transitions 0/350 dead transitions. [2024-06-27 21:36:18,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 350 transitions, 5503 flow [2024-06-27 21:36:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 21:36:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:36:18,293 INFO L175 Difference]: Start difference. First operand has 233 places, 312 transitions, 4241 flow. Second operand 8 states and 140 transitions. [2024-06-27 21:36:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 350 transitions, 5503 flow [2024-06-27 21:36:18,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 350 transitions, 5304 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:18,783 INFO L231 Difference]: Finished difference. Result has 236 places, 323 transitions, 4471 flow [2024-06-27 21:36:18,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4471, PETRI_PLACES=236, PETRI_TRANSITIONS=323} [2024-06-27 21:36:18,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-27 21:36:18,784 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 323 transitions, 4471 flow [2024-06-27 21:36:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:18,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:18,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:18,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:36:18,784 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)] === [2024-06-27 21:36:18,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1647831388, now seen corresponding path program 7 times [2024-06-27 21:36:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:18,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568625739] [2024-06-27 21:36:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:21,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:21,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568625739] [2024-06-27 21:36:21,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568625739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:21,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474626908] [2024-06-27 21:36:21,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 323 transitions, 4471 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:22,608 INFO L124 PetriNetUnfolderBase]: 2815/4572 cut-off events. [2024-06-27 21:36:22,608 INFO L125 PetriNetUnfolderBase]: For 369618/369618 co-relation queries the response was YES. [2024-06-27 21:36:22,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42987 conditions, 4572 events. 2815/4572 cut-off events. For 369618/369618 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27603 event pairs, 641 based on Foata normal form. 1/4569 useless extension candidates. Maximal degree in co-relation 42876. Up to 4235 conditions per place. [2024-06-27 21:36:22,660 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 73 changer transitions 0/349 dead transitions. [2024-06-27 21:36:22,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 349 transitions, 5480 flow [2024-06-27 21:36:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:36:22,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 21:36:22,662 INFO L175 Difference]: Start difference. First operand has 236 places, 323 transitions, 4471 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:36:22,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 349 transitions, 5480 flow [2024-06-27 21:36:23,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 349 transitions, 5272 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:23,255 INFO L231 Difference]: Finished difference. Result has 241 places, 327 transitions, 4542 flow [2024-06-27 21:36:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4542, PETRI_PLACES=241, PETRI_TRANSITIONS=327} [2024-06-27 21:36:23,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 21:36:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 327 transitions, 4542 flow [2024-06-27 21:36:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:23,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:23,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:36:23,257 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)] === [2024-06-27 21:36:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 433657933, now seen corresponding path program 4 times [2024-06-27 21:36:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887519174] [2024-06-27 21:36:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887519174] [2024-06-27 21:36:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887519174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:26,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450706139] [2024-06-27 21:36:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:26,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:26,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 327 transitions, 4542 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:26,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:26,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:26,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:27,594 INFO L124 PetriNetUnfolderBase]: 2835/4600 cut-off events. [2024-06-27 21:36:27,594 INFO L125 PetriNetUnfolderBase]: For 380981/380981 co-relation queries the response was YES. [2024-06-27 21:36:27,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43245 conditions, 4600 events. 2835/4600 cut-off events. For 380981/380981 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27757 event pairs, 640 based on Foata normal form. 4/4600 useless extension candidates. Maximal degree in co-relation 43132. Up to 4323 conditions per place. [2024-06-27 21:36:27,647 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 31 changer transitions 0/353 dead transitions. [2024-06-27 21:36:27,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 353 transitions, 5470 flow [2024-06-27 21:36:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:36:27,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:36:27,649 INFO L175 Difference]: Start difference. First operand has 241 places, 327 transitions, 4542 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:36:27,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 353 transitions, 5470 flow [2024-06-27 21:36:28,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 353 transitions, 5308 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:28,210 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4609 flow [2024-06-27 21:36:28,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4609, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-27 21:36:28,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 21:36:28,211 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4609 flow [2024-06-27 21:36:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:28,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:28,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:36:28,211 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)] === [2024-06-27 21:36:28,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 788187728, now seen corresponding path program 8 times [2024-06-27 21:36:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824231765] [2024-06-27 21:36:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:28,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:30,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824231765] [2024-06-27 21:36:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824231765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:30,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:30,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402410550] [2024-06-27 21:36:30,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:30,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:30,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4609 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:30,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:30,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:30,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:32,269 INFO L124 PetriNetUnfolderBase]: 2832/4596 cut-off events. [2024-06-27 21:36:32,269 INFO L125 PetriNetUnfolderBase]: For 385504/385504 co-relation queries the response was YES. [2024-06-27 21:36:32,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43556 conditions, 4596 events. 2832/4596 cut-off events. For 385504/385504 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27689 event pairs, 636 based on Foata normal form. 1/4593 useless extension candidates. Maximal degree in co-relation 43442. Up to 4299 conditions per place. [2024-06-27 21:36:32,325 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 46 changer transitions 0/353 dead transitions. [2024-06-27 21:36:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 353 transitions, 5485 flow [2024-06-27 21:36:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:36:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:36:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:36:32,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 21:36:32,329 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4609 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:36:32,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 353 transitions, 5485 flow [2024-06-27 21:36:33,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 353 transitions, 5302 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:33,061 INFO L231 Difference]: Finished difference. Result has 247 places, 337 transitions, 4691 flow [2024-06-27 21:36:33,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4691, PETRI_PLACES=247, PETRI_TRANSITIONS=337} [2024-06-27 21:36:33,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 21:36:33,062 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 337 transitions, 4691 flow [2024-06-27 21:36:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:33,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:33,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:33,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:36:33,062 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)] === [2024-06-27 21:36:33,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash -682869307, now seen corresponding path program 5 times [2024-06-27 21:36:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:33,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064480324] [2024-06-27 21:36:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:33,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:35,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:35,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064480324] [2024-06-27 21:36:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064480324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:35,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674910686] [2024-06-27 21:36:35,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:35,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:35,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 337 transitions, 4691 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:35,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:35,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:35,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:37,153 INFO L124 PetriNetUnfolderBase]: 2850/4625 cut-off events. [2024-06-27 21:36:37,153 INFO L125 PetriNetUnfolderBase]: For 401913/401913 co-relation queries the response was YES. [2024-06-27 21:36:37,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44283 conditions, 4625 events. 2850/4625 cut-off events. For 401913/401913 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27942 event pairs, 636 based on Foata normal form. 2/4623 useless extension candidates. Maximal degree in co-relation 44167. Up to 4297 conditions per place. [2024-06-27 21:36:37,208 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 50 changer transitions 0/364 dead transitions. [2024-06-27 21:36:37,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 364 transitions, 5861 flow [2024-06-27 21:36:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:36:37,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:36:37,209 INFO L175 Difference]: Start difference. First operand has 247 places, 337 transitions, 4691 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:36:37,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 364 transitions, 5861 flow [2024-06-27 21:36:37,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 364 transitions, 5737 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-27 21:36:37,854 INFO L231 Difference]: Finished difference. Result has 252 places, 343 transitions, 4903 flow [2024-06-27 21:36:37,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=252, PETRI_TRANSITIONS=343} [2024-06-27 21:36:37,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 21:36:37,854 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 343 transitions, 4903 flow [2024-06-27 21:36:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:37,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:37,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:37,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:36:37,855 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)] === [2024-06-27 21:36:37,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:37,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1560990623, now seen corresponding path program 6 times [2024-06-27 21:36:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:37,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633243866] [2024-06-27 21:36:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:37,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:40,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:40,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633243866] [2024-06-27 21:36:40,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633243866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:40,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:40,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:40,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966414493] [2024-06-27 21:36:40,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:40,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:40,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:40,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 343 transitions, 4903 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:40,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:40,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:42,039 INFO L124 PetriNetUnfolderBase]: 2854/4633 cut-off events. [2024-06-27 21:36:42,039 INFO L125 PetriNetUnfolderBase]: For 413532/413532 co-relation queries the response was YES. [2024-06-27 21:36:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44662 conditions, 4633 events. 2854/4633 cut-off events. For 413532/413532 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28012 event pairs, 631 based on Foata normal form. 4/4636 useless extension candidates. Maximal degree in co-relation 44544. Up to 4382 conditions per place. [2024-06-27 21:36:42,099 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 329 selfloop transitions, 33 changer transitions 0/367 dead transitions. [2024-06-27 21:36:42,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 367 transitions, 5830 flow [2024-06-27 21:36:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:36:42,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:36:42,100 INFO L175 Difference]: Start difference. First operand has 252 places, 343 transitions, 4903 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:36:42,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 367 transitions, 5830 flow [2024-06-27 21:36:42,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 367 transitions, 5606 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:42,841 INFO L231 Difference]: Finished difference. Result has 256 places, 346 transitions, 4862 flow [2024-06-27 21:36:42,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4862, PETRI_PLACES=256, PETRI_TRANSITIONS=346} [2024-06-27 21:36:42,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 21:36:42,842 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 346 transitions, 4862 flow [2024-06-27 21:36:42,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:42,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:42,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:36:42,843 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)] === [2024-06-27 21:36:42,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1291232923, now seen corresponding path program 7 times [2024-06-27 21:36:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:42,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531045926] [2024-06-27 21:36:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:44,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531045926] [2024-06-27 21:36:44,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531045926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:44,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:44,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:44,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190325629] [2024-06-27 21:36:44,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:44,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:44,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:44,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 346 transitions, 4862 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:44,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:44,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:44,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:46,706 INFO L124 PetriNetUnfolderBase]: 2879/4666 cut-off events. [2024-06-27 21:36:46,706 INFO L125 PetriNetUnfolderBase]: For 428018/428018 co-relation queries the response was YES. [2024-06-27 21:36:46,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45492 conditions, 4666 events. 2879/4666 cut-off events. For 428018/428018 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28293 event pairs, 613 based on Foata normal form. 5/4661 useless extension candidates. Maximal degree in co-relation 45372. Up to 4351 conditions per place. [2024-06-27 21:36:46,765 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 47 changer transitions 0/373 dead transitions. [2024-06-27 21:36:46,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 373 transitions, 6073 flow [2024-06-27 21:36:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:36:46,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:36:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 21:36:46,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 21:36:46,767 INFO L175 Difference]: Start difference. First operand has 256 places, 346 transitions, 4862 flow. Second operand 8 states and 129 transitions. [2024-06-27 21:36:46,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 373 transitions, 6073 flow [2024-06-27 21:36:47,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 373 transitions, 5881 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:47,345 INFO L231 Difference]: Finished difference. Result has 258 places, 352 transitions, 4996 flow [2024-06-27 21:36:47,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4996, PETRI_PLACES=258, PETRI_TRANSITIONS=352} [2024-06-27 21:36:47,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 21:36:47,346 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 352 transitions, 4996 flow [2024-06-27 21:36:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:47,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:47,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:47,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:36:47,347 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)] === [2024-06-27 21:36:47,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1442085791, now seen corresponding path program 8 times [2024-06-27 21:36:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:47,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561336299] [2024-06-27 21:36:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:47,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:49,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:49,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561336299] [2024-06-27 21:36:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561336299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:49,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372055646] [2024-06-27 21:36:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:49,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 352 transitions, 4996 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:49,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:49,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:49,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:51,878 INFO L124 PetriNetUnfolderBase]: 3000/4858 cut-off events. [2024-06-27 21:36:51,878 INFO L125 PetriNetUnfolderBase]: For 481657/481657 co-relation queries the response was YES. [2024-06-27 21:36:51,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49168 conditions, 4858 events. 3000/4858 cut-off events. For 481657/481657 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29480 event pairs, 589 based on Foata normal form. 5/4862 useless extension candidates. Maximal degree in co-relation 49048. Up to 4234 conditions per place. [2024-06-27 21:36:51,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 107 changer transitions 0/401 dead transitions. [2024-06-27 21:36:51,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 401 transitions, 6692 flow [2024-06-27 21:36:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:36:51,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:36:51,941 INFO L175 Difference]: Start difference. First operand has 258 places, 352 transitions, 4996 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:36:51,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 401 transitions, 6692 flow [2024-06-27 21:36:52,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 401 transitions, 6467 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:52,622 INFO L231 Difference]: Finished difference. Result has 263 places, 374 transitions, 5711 flow [2024-06-27 21:36:52,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=263, PETRI_TRANSITIONS=374} [2024-06-27 21:36:52,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 21:36:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 374 transitions, 5711 flow [2024-06-27 21:36:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:52,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:36:52,624 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)] === [2024-06-27 21:36:52,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1442234746, now seen corresponding path program 9 times [2024-06-27 21:36:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591845955] [2024-06-27 21:36:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:55,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:55,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591845955] [2024-06-27 21:36:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591845955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:55,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508352207] [2024-06-27 21:36:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:55,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:36:55,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 374 transitions, 5711 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:55,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:55,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:36:55,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:57,229 INFO L124 PetriNetUnfolderBase]: 3007/4854 cut-off events. [2024-06-27 21:36:57,230 INFO L125 PetriNetUnfolderBase]: For 492606/492606 co-relation queries the response was YES. [2024-06-27 21:36:57,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50599 conditions, 4854 events. 3007/4854 cut-off events. For 492606/492606 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29417 event pairs, 621 based on Foata normal form. 3/4847 useless extension candidates. Maximal degree in co-relation 50477. Up to 4522 conditions per place. [2024-06-27 21:36:57,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 79 changer transitions 0/395 dead transitions. [2024-06-27 21:36:57,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 395 transitions, 6909 flow [2024-06-27 21:36:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:36:57,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 21:36:57,289 INFO L175 Difference]: Start difference. First operand has 263 places, 374 transitions, 5711 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:36:57,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 395 transitions, 6909 flow [2024-06-27 21:36:58,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 395 transitions, 6644 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-27 21:36:58,184 INFO L231 Difference]: Finished difference. Result has 268 places, 380 transitions, 5860 flow [2024-06-27 21:36:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5860, PETRI_PLACES=268, PETRI_TRANSITIONS=380} [2024-06-27 21:36:58,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 21:36:58,184 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 380 transitions, 5860 flow [2024-06-27 21:36:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:36:58,185 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)] === [2024-06-27 21:36:58,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:58,185 INFO L85 PathProgramCache]: Analyzing trace with hash 533240668, now seen corresponding path program 10 times [2024-06-27 21:36:58,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:58,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238717639] [2024-06-27 21:36:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238717639] [2024-06-27 21:37:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238717639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:00,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35087051] [2024-06-27 21:37:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:00,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:00,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 380 transitions, 5860 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:00,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:00,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:02,322 INFO L124 PetriNetUnfolderBase]: 3038/4900 cut-off events. [2024-06-27 21:37:02,323 INFO L125 PetriNetUnfolderBase]: For 517511/517511 co-relation queries the response was YES. [2024-06-27 21:37:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51835 conditions, 4900 events. 3038/4900 cut-off events. For 517511/517511 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29657 event pairs, 631 based on Foata normal form. 2/4892 useless extension candidates. Maximal degree in co-relation 51711. Up to 4579 conditions per place. [2024-06-27 21:37:02,383 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 65 changer transitions 0/407 dead transitions. [2024-06-27 21:37:02,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 407 transitions, 7176 flow [2024-06-27 21:37:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:37:02,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 21:37:02,385 INFO L175 Difference]: Start difference. First operand has 268 places, 380 transitions, 5860 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:37:02,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 407 transitions, 7176 flow [2024-06-27 21:37:03,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 407 transitions, 6900 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:03,292 INFO L231 Difference]: Finished difference. Result has 273 places, 390 transitions, 6086 flow [2024-06-27 21:37:03,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6086, PETRI_PLACES=273, PETRI_TRANSITIONS=390} [2024-06-27 21:37:03,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 21:37:03,293 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 390 transitions, 6086 flow [2024-06-27 21:37:03,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:03,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:03,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:37:03,293 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)] === [2024-06-27 21:37:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:03,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1649154941, now seen corresponding path program 9 times [2024-06-27 21:37:03,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:03,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632786602] [2024-06-27 21:37:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632786602] [2024-06-27 21:37:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632786602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486193446] [2024-06-27 21:37:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:05,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:05,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:05,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 390 transitions, 6086 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:05,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:05,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:05,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:07,308 INFO L124 PetriNetUnfolderBase]: 3068/4944 cut-off events. [2024-06-27 21:37:07,308 INFO L125 PetriNetUnfolderBase]: For 543778/543778 co-relation queries the response was YES. [2024-06-27 21:37:07,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53048 conditions, 4944 events. 3068/4944 cut-off events. For 543778/543778 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29990 event pairs, 627 based on Foata normal form. 6/4940 useless extension candidates. Maximal degree in co-relation 52921. Up to 4559 conditions per place. [2024-06-27 21:37:07,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 65 changer transitions 0/423 dead transitions. [2024-06-27 21:37:07,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 423 transitions, 7795 flow [2024-06-27 21:37:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:37:07,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:37:07,369 INFO L175 Difference]: Start difference. First operand has 273 places, 390 transitions, 6086 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:37:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 423 transitions, 7795 flow [2024-06-27 21:37:08,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 423 transitions, 7606 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:08,452 INFO L231 Difference]: Finished difference. Result has 277 places, 399 transitions, 6494 flow [2024-06-27 21:37:08,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6494, PETRI_PLACES=277, PETRI_TRANSITIONS=399} [2024-06-27 21:37:08,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 21:37:08,453 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 399 transitions, 6494 flow [2024-06-27 21:37:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:08,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:08,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:08,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:37:08,454 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)] === [2024-06-27 21:37:08,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:08,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1442501501, now seen corresponding path program 10 times [2024-06-27 21:37:08,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:08,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304704777] [2024-06-27 21:37:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:08,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:10,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304704777] [2024-06-27 21:37:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304704777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614836819] [2024-06-27 21:37:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:10,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:10,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 399 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:10,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:10,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:12,254 INFO L124 PetriNetUnfolderBase]: 3104/5006 cut-off events. [2024-06-27 21:37:12,254 INFO L125 PetriNetUnfolderBase]: For 567848/567848 co-relation queries the response was YES. [2024-06-27 21:37:12,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54871 conditions, 5006 events. 3104/5006 cut-off events. For 567848/567848 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30494 event pairs, 626 based on Foata normal form. 4/5000 useless extension candidates. Maximal degree in co-relation 54742. Up to 4410 conditions per place. [2024-06-27 21:37:12,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 127 changer transitions 0/438 dead transitions. [2024-06-27 21:37:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 438 transitions, 8629 flow [2024-06-27 21:37:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:37:12,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:37:12,325 INFO L175 Difference]: Start difference. First operand has 277 places, 399 transitions, 6494 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:37:12,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 438 transitions, 8629 flow [2024-06-27 21:37:13,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 438 transitions, 8381 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-27 21:37:13,268 INFO L231 Difference]: Finished difference. Result has 282 places, 413 transitions, 7242 flow [2024-06-27 21:37:13,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6246, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7242, PETRI_PLACES=282, PETRI_TRANSITIONS=413} [2024-06-27 21:37:13,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 21:37:13,268 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 413 transitions, 7242 flow [2024-06-27 21:37:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:13,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:13,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:37:13,269 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)] === [2024-06-27 21:37:13,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 545246193, now seen corresponding path program 11 times [2024-06-27 21:37:13,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741452766] [2024-06-27 21:37:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:15,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741452766] [2024-06-27 21:37:15,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741452766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:15,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:15,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:15,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446991969] [2024-06-27 21:37:15,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:15,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:15,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:15,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:15,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 413 transitions, 7242 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:15,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:15,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:17,265 INFO L124 PetriNetUnfolderBase]: 3115/5039 cut-off events. [2024-06-27 21:37:17,265 INFO L125 PetriNetUnfolderBase]: For 584351/584351 co-relation queries the response was YES. [2024-06-27 21:37:17,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55854 conditions, 5039 events. 3115/5039 cut-off events. For 584351/584351 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30784 event pairs, 659 based on Foata normal form. 6/5044 useless extension candidates. Maximal degree in co-relation 55722. Up to 4747 conditions per place. [2024-06-27 21:37:17,331 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 41 changer transitions 0/450 dead transitions. [2024-06-27 21:37:17,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 450 transitions, 9051 flow [2024-06-27 21:37:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 21:37:17,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 21:37:17,332 INFO L175 Difference]: Start difference. First operand has 282 places, 413 transitions, 7242 flow. Second operand 9 states and 139 transitions. [2024-06-27 21:37:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 450 transitions, 9051 flow [2024-06-27 21:37:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 450 transitions, 8707 flow, removed 144 selfloop flow, removed 3 redundant places. [2024-06-27 21:37:18,539 INFO L231 Difference]: Finished difference. Result has 290 places, 427 transitions, 7581 flow [2024-06-27 21:37:18,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7581, PETRI_PLACES=290, PETRI_TRANSITIONS=427} [2024-06-27 21:37:18,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 21:37:18,540 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 427 transitions, 7581 flow [2024-06-27 21:37:18,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:18,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:18,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:37:18,541 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)] === [2024-06-27 21:37:18,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1637329061, now seen corresponding path program 12 times [2024-06-27 21:37:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:18,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232697424] [2024-06-27 21:37:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232697424] [2024-06-27 21:37:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232697424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:20,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:20,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382461734] [2024-06-27 21:37:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:20,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:20,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:20,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 427 transitions, 7581 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:20,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:20,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:22,709 INFO L124 PetriNetUnfolderBase]: 3175/5130 cut-off events. [2024-06-27 21:37:22,709 INFO L125 PetriNetUnfolderBase]: For 602867/602867 co-relation queries the response was YES. [2024-06-27 21:37:22,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57344 conditions, 5130 events. 3175/5130 cut-off events. For 602867/602867 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31250 event pairs, 670 based on Foata normal form. 4/5133 useless extension candidates. Maximal degree in co-relation 57208. Up to 4806 conditions per place. [2024-06-27 21:37:22,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 36 changer transitions 0/463 dead transitions. [2024-06-27 21:37:22,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 463 transitions, 9228 flow [2024-06-27 21:37:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:37:22,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 21:37:22,782 INFO L175 Difference]: Start difference. First operand has 290 places, 427 transitions, 7581 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:37:22,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 463 transitions, 9228 flow [2024-06-27 21:37:24,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 463 transitions, 9003 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:24,066 INFO L231 Difference]: Finished difference. Result has 294 places, 438 transitions, 7788 flow [2024-06-27 21:37:24,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7788, PETRI_PLACES=294, PETRI_TRANSITIONS=438} [2024-06-27 21:37:24,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 21:37:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 438 transitions, 7788 flow [2024-06-27 21:37:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:24,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:24,067 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] [2024-06-27 21:37:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:37:24,067 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)] === [2024-06-27 21:37:24,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1648939615, now seen corresponding path program 2 times [2024-06-27 21:37:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:24,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133664932] [2024-06-27 21:37:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:27,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:27,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133664932] [2024-06-27 21:37:27,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133664932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:27,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:27,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:27,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599520736] [2024-06-27 21:37:27,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:27,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:27,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:27,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:27,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:27,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 438 transitions, 7788 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:27,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:27,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:27,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:29,285 INFO L124 PetriNetUnfolderBase]: 3219/5184 cut-off events. [2024-06-27 21:37:29,285 INFO L125 PetriNetUnfolderBase]: For 643142/643142 co-relation queries the response was YES. [2024-06-27 21:37:29,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58358 conditions, 5184 events. 3219/5184 cut-off events. For 643142/643142 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31622 event pairs, 642 based on Foata normal form. 12/5186 useless extension candidates. Maximal degree in co-relation 58220. Up to 4782 conditions per place. [2024-06-27 21:37:29,358 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 403 selfloop transitions, 54 changer transitions 0/462 dead transitions. [2024-06-27 21:37:29,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 462 transitions, 9081 flow [2024-06-27 21:37:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:37:29,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 21:37:29,360 INFO L175 Difference]: Start difference. First operand has 294 places, 438 transitions, 7788 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:37:29,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 462 transitions, 9081 flow [2024-06-27 21:37:30,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 462 transitions, 8916 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:30,782 INFO L231 Difference]: Finished difference. Result has 297 places, 439 transitions, 7763 flow [2024-06-27 21:37:30,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7763, PETRI_PLACES=297, PETRI_TRANSITIONS=439} [2024-06-27 21:37:30,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 21:37:30,782 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 439 transitions, 7763 flow [2024-06-27 21:37:30,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:30,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:30,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:30,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:37:30,783 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)] === [2024-06-27 21:37:30,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1249442305, now seen corresponding path program 3 times [2024-06-27 21:37:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247312807] [2024-06-27 21:37:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247312807] [2024-06-27 21:37:34,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247312807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:34,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636622032] [2024-06-27 21:37:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:34,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 439 transitions, 7763 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:36,292 INFO L124 PetriNetUnfolderBase]: 3263/5274 cut-off events. [2024-06-27 21:37:36,292 INFO L125 PetriNetUnfolderBase]: For 657759/657759 co-relation queries the response was YES. [2024-06-27 21:37:36,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59081 conditions, 5274 events. 3263/5274 cut-off events. For 657759/657759 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32360 event pairs, 684 based on Foata normal form. 12/5285 useless extension candidates. Maximal degree in co-relation 58942. Up to 4972 conditions per place. [2024-06-27 21:37:36,371 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 433 selfloop transitions, 22 changer transitions 0/460 dead transitions. [2024-06-27 21:37:36,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 460 transitions, 8949 flow [2024-06-27 21:37:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 21:37:36,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 21:37:36,372 INFO L175 Difference]: Start difference. First operand has 297 places, 439 transitions, 7763 flow. Second operand 8 states and 126 transitions. [2024-06-27 21:37:36,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 460 transitions, 8949 flow [2024-06-27 21:37:37,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 460 transitions, 8837 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:37,784 INFO L231 Difference]: Finished difference. Result has 299 places, 440 transitions, 7730 flow [2024-06-27 21:37:37,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7651, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7730, PETRI_PLACES=299, PETRI_TRANSITIONS=440} [2024-06-27 21:37:37,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 21:37:37,785 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 440 transitions, 7730 flow [2024-06-27 21:37:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:37,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:37,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:37,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:37:37,785 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:37,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1235157505, now seen corresponding path program 4 times [2024-06-27 21:37:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688100788] [2024-06-27 21:37:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688100788] [2024-06-27 21:37:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688100788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:40,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800776066] [2024-06-27 21:37:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:40,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:40,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 440 transitions, 7730 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:40,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:42,988 INFO L124 PetriNetUnfolderBase]: 3265/5280 cut-off events. [2024-06-27 21:37:42,988 INFO L125 PetriNetUnfolderBase]: For 638463/638463 co-relation queries the response was YES. [2024-06-27 21:37:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 5280 events. 3265/5280 cut-off events. For 638463/638463 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32331 event pairs, 670 based on Foata normal form. 8/5287 useless extension candidates. Maximal degree in co-relation 58604. Up to 4940 conditions per place. [2024-06-27 21:37:43,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 25 changer transitions 0/466 dead transitions. [2024-06-27 21:37:43,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 466 transitions, 9042 flow [2024-06-27 21:37:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:37:43,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 21:37:43,058 INFO L175 Difference]: Start difference. First operand has 299 places, 440 transitions, 7730 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:37:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 466 transitions, 9042 flow [2024-06-27 21:37:44,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 466 transitions, 8993 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:37:44,383 INFO L231 Difference]: Finished difference. Result has 302 places, 441 transitions, 7765 flow [2024-06-27 21:37:44,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7765, PETRI_PLACES=302, PETRI_TRANSITIONS=441} [2024-06-27 21:37:44,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 21:37:44,384 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 441 transitions, 7765 flow [2024-06-27 21:37:44,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:44,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:44,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:44,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:37:44,384 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:44,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1442070911, now seen corresponding path program 1 times [2024-06-27 21:37:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:44,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340997042] [2024-06-27 21:37:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:44,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340997042] [2024-06-27 21:37:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340997042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:47,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:47,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:47,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595542432] [2024-06-27 21:37:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:47,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:47,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:47,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 441 transitions, 7765 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:49,220 INFO L124 PetriNetUnfolderBase]: 3273/5292 cut-off events. [2024-06-27 21:37:49,220 INFO L125 PetriNetUnfolderBase]: For 634764/634764 co-relation queries the response was YES. [2024-06-27 21:37:49,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 5292 events. 3273/5292 cut-off events. For 634764/634764 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32483 event pairs, 688 based on Foata normal form. 2/5293 useless extension candidates. Maximal degree in co-relation 58878. Up to 5039 conditions per place. [2024-06-27 21:37:49,296 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 425 selfloop transitions, 28 changer transitions 0/458 dead transitions. [2024-06-27 21:37:49,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 458 transitions, 8795 flow [2024-06-27 21:37:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:37:49,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 21:37:49,297 INFO L175 Difference]: Start difference. First operand has 302 places, 441 transitions, 7765 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:37:49,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 458 transitions, 8795 flow [2024-06-27 21:37:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 458 transitions, 8733 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:37:50,725 INFO L231 Difference]: Finished difference. Result has 303 places, 443 transitions, 7842 flow [2024-06-27 21:37:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7703, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7842, PETRI_PLACES=303, PETRI_TRANSITIONS=443} [2024-06-27 21:37:50,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 21:37:50,726 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 443 transitions, 7842 flow [2024-06-27 21:37:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:50,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:37:50,726 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:50,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1242769121, now seen corresponding path program 2 times [2024-06-27 21:37:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280107062] [2024-06-27 21:37:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:53,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:53,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280107062] [2024-06-27 21:37:53,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280107062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:53,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914469098] [2024-06-27 21:37:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:53,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:53,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:53,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:37:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 443 transitions, 7842 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:37:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:55,684 INFO L124 PetriNetUnfolderBase]: 3268/5287 cut-off events. [2024-06-27 21:37:55,684 INFO L125 PetriNetUnfolderBase]: For 638629/638629 co-relation queries the response was YES. [2024-06-27 21:37:55,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58800 conditions, 5287 events. 3268/5287 cut-off events. For 638629/638629 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32430 event pairs, 685 based on Foata normal form. 2/5288 useless extension candidates. Maximal degree in co-relation 58658. Up to 5039 conditions per place. [2024-06-27 21:37:55,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 430 selfloop transitions, 22 changer transitions 0/457 dead transitions. [2024-06-27 21:37:55,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 457 transitions, 8786 flow [2024-06-27 21:37:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:37:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:37:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 21:37:55,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-27 21:37:55,757 INFO L175 Difference]: Start difference. First operand has 303 places, 443 transitions, 7842 flow. Second operand 8 states and 121 transitions. [2024-06-27 21:37:55,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 457 transitions, 8786 flow [2024-06-27 21:37:57,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 457 transitions, 8518 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:57,252 INFO L231 Difference]: Finished difference. Result has 306 places, 443 transitions, 7624 flow [2024-06-27 21:37:57,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7574, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7624, PETRI_PLACES=306, PETRI_TRANSITIONS=443} [2024-06-27 21:37:57,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 21:37:57,253 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 443 transitions, 7624 flow [2024-06-27 21:37:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:57,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:57,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:57,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:37:57,253 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:57,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1235150561, now seen corresponding path program 3 times [2024-06-27 21:37:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:57,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367013834] [2024-06-27 21:37:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:00,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367013834] [2024-06-27 21:38:00,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367013834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:00,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:00,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:00,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952021857] [2024-06-27 21:38:00,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:00,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:00,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:00,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 443 transitions, 7624 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:00,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:00,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:00,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:02,681 INFO L124 PetriNetUnfolderBase]: 3276/5295 cut-off events. [2024-06-27 21:38:02,681 INFO L125 PetriNetUnfolderBase]: For 650369/650369 co-relation queries the response was YES. [2024-06-27 21:38:02,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58859 conditions, 5295 events. 3276/5295 cut-off events. For 650369/650369 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32533 event pairs, 670 based on Foata normal form. 2/5296 useless extension candidates. Maximal degree in co-relation 58716. Up to 4947 conditions per place. [2024-06-27 21:38:02,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 420 selfloop transitions, 48 changer transitions 0/473 dead transitions. [2024-06-27 21:38:02,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 473 transitions, 9167 flow [2024-06-27 21:38:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 21:38:02,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-27 21:38:02,752 INFO L175 Difference]: Start difference. First operand has 306 places, 443 transitions, 7624 flow. Second operand 9 states and 137 transitions. [2024-06-27 21:38:02,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 473 transitions, 9167 flow [2024-06-27 21:38:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 473 transitions, 9120 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:04,176 INFO L231 Difference]: Finished difference. Result has 311 places, 451 transitions, 8059 flow [2024-06-27 21:38:04,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8059, PETRI_PLACES=311, PETRI_TRANSITIONS=451} [2024-06-27 21:38:04,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 21:38:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 451 transitions, 8059 flow [2024-06-27 21:38:04,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:04,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:04,177 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] [2024-06-27 21:38:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:38:04,177 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1274027497, now seen corresponding path program 1 times [2024-06-27 21:38:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:04,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635594811] [2024-06-27 21:38:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:04,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:06,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:06,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635594811] [2024-06-27 21:38:06,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635594811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:06,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:06,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:06,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854270758] [2024-06-27 21:38:06,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:06,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:06,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:06,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 451 transitions, 8059 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:06,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:06,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:06,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:08,917 INFO L124 PetriNetUnfolderBase]: 3284/5306 cut-off events. [2024-06-27 21:38:08,917 INFO L125 PetriNetUnfolderBase]: For 665681/665681 co-relation queries the response was YES. [2024-06-27 21:38:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59517 conditions, 5306 events. 3284/5306 cut-off events. For 665681/665681 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32329 event pairs, 510 based on Foata normal form. 2/5307 useless extension candidates. Maximal degree in co-relation 59372. Up to 4891 conditions per place. [2024-06-27 21:38:08,993 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 446 selfloop transitions, 38 changer transitions 0/489 dead transitions. [2024-06-27 21:38:08,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 489 transitions, 9413 flow [2024-06-27 21:38:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:38:08,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:38:08,994 INFO L175 Difference]: Start difference. First operand has 311 places, 451 transitions, 8059 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:38:08,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 489 transitions, 9413 flow [2024-06-27 21:38:10,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 489 transitions, 9261 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:10,602 INFO L231 Difference]: Finished difference. Result has 313 places, 455 transitions, 8113 flow [2024-06-27 21:38:10,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7907, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8113, PETRI_PLACES=313, PETRI_TRANSITIONS=455} [2024-06-27 21:38:10,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 21:38:10,603 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 455 transitions, 8113 flow [2024-06-27 21:38:10,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:10,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:10,603 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] [2024-06-27 21:38:10,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:38:10,604 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:10,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1438227571, now seen corresponding path program 2 times [2024-06-27 21:38:10,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:10,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904653931] [2024-06-27 21:38:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:10,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:13,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:13,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904653931] [2024-06-27 21:38:13,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904653931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:13,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:13,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:13,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936541773] [2024-06-27 21:38:13,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:13,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:13,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:13,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:13,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 455 transitions, 8113 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:13,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:13,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:13,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:15,837 INFO L124 PetriNetUnfolderBase]: 3297/5331 cut-off events. [2024-06-27 21:38:15,838 INFO L125 PetriNetUnfolderBase]: For 678587/678587 co-relation queries the response was YES. [2024-06-27 21:38:15,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59802 conditions, 5331 events. 3297/5331 cut-off events. For 678587/678587 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 32755 event pairs, 662 based on Foata normal form. 2/5332 useless extension candidates. Maximal degree in co-relation 59656. Up to 5006 conditions per place. [2024-06-27 21:38:15,921 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 39 changer transitions 0/488 dead transitions. [2024-06-27 21:38:15,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 488 transitions, 9286 flow [2024-06-27 21:38:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:38:15,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 21:38:15,923 INFO L175 Difference]: Start difference. First operand has 313 places, 455 transitions, 8113 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:38:15,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 488 transitions, 9286 flow [2024-06-27 21:38:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 488 transitions, 9150 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:17,377 INFO L231 Difference]: Finished difference. Result has 317 places, 460 transitions, 8187 flow [2024-06-27 21:38:17,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8003, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8187, PETRI_PLACES=317, PETRI_TRANSITIONS=460} [2024-06-27 21:38:17,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 21:38:17,378 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 460 transitions, 8187 flow [2024-06-27 21:38:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:17,379 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] [2024-06-27 21:38:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:38:17,379 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:17,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1271167561, now seen corresponding path program 1 times [2024-06-27 21:38:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571851546] [2024-06-27 21:38:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:20,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571851546] [2024-06-27 21:38:20,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571851546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:20,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:20,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688663732] [2024-06-27 21:38:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:20,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:20,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:20,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:20,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 460 transitions, 8187 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:20,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:20,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:20,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:22,783 INFO L124 PetriNetUnfolderBase]: 3302/5344 cut-off events. [2024-06-27 21:38:22,783 INFO L125 PetriNetUnfolderBase]: For 689993/689993 co-relation queries the response was YES. [2024-06-27 21:38:22,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60005 conditions, 5344 events. 3302/5344 cut-off events. For 689993/689993 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32870 event pairs, 658 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 59858. Up to 5008 conditions per place. [2024-06-27 21:38:22,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 32 changer transitions 0/494 dead transitions. [2024-06-27 21:38:22,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 494 transitions, 9411 flow [2024-06-27 21:38:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:38:22,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 21:38:22,860 INFO L175 Difference]: Start difference. First operand has 317 places, 460 transitions, 8187 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:38:22,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 494 transitions, 9411 flow [2024-06-27 21:38:24,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 494 transitions, 9316 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:24,376 INFO L231 Difference]: Finished difference. Result has 320 places, 463 transitions, 8319 flow [2024-06-27 21:38:24,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8319, PETRI_PLACES=320, PETRI_TRANSITIONS=463} [2024-06-27 21:38:24,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 21:38:24,376 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 463 transitions, 8319 flow [2024-06-27 21:38:24,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:24,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:24,376 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] [2024-06-27 21:38:24,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:38:24,377 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:24,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 460385657, now seen corresponding path program 3 times [2024-06-27 21:38:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:24,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814823042] [2024-06-27 21:38:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:24,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:27,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814823042] [2024-06-27 21:38:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814823042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:27,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:27,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822979352] [2024-06-27 21:38:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:27,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:27,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:27,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:27,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 463 transitions, 8319 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:27,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:27,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:27,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:29,574 INFO L124 PetriNetUnfolderBase]: 3310/5351 cut-off events. [2024-06-27 21:38:29,574 INFO L125 PetriNetUnfolderBase]: For 709976/709976 co-relation queries the response was YES. [2024-06-27 21:38:29,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60516 conditions, 5351 events. 3310/5351 cut-off events. For 709976/709976 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32913 event pairs, 639 based on Foata normal form. 2/5352 useless extension candidates. Maximal degree in co-relation 60368. Up to 5025 conditions per place. [2024-06-27 21:38:29,645 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 443 selfloop transitions, 39 changer transitions 0/487 dead transitions. [2024-06-27 21:38:29,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 487 transitions, 9400 flow [2024-06-27 21:38:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:38:29,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 21:38:29,646 INFO L175 Difference]: Start difference. First operand has 320 places, 463 transitions, 8319 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:38:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 487 transitions, 9400 flow [2024-06-27 21:38:31,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 487 transitions, 9197 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:31,076 INFO L231 Difference]: Finished difference. Result has 323 places, 466 transitions, 8272 flow [2024-06-27 21:38:31,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8116, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8272, PETRI_PLACES=323, PETRI_TRANSITIONS=466} [2024-06-27 21:38:31,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-27 21:38:31,076 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 466 transitions, 8272 flow [2024-06-27 21:38:31,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:31,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:31,077 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] [2024-06-27 21:38:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:38:31,077 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:31,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash -980714057, now seen corresponding path program 2 times [2024-06-27 21:38:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:31,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853162422] [2024-06-27 21:38:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853162422] [2024-06-27 21:38:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853162422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653729288] [2024-06-27 21:38:33,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:33,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:33,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 466 transitions, 8272 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:33,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:33,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:33,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:35,862 INFO L124 PetriNetUnfolderBase]: 3328/5387 cut-off events. [2024-06-27 21:38:35,862 INFO L125 PetriNetUnfolderBase]: For 727842/727842 co-relation queries the response was YES. [2024-06-27 21:38:35,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61156 conditions, 5387 events. 3328/5387 cut-off events. For 727842/727842 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33227 event pairs, 676 based on Foata normal form. 2/5388 useless extension candidates. Maximal degree in co-relation 61006. Up to 5076 conditions per place. [2024-06-27 21:38:35,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 30 changer transitions 0/498 dead transitions. [2024-06-27 21:38:35,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 498 transitions, 9832 flow [2024-06-27 21:38:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:38:35,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:38:35,945 INFO L175 Difference]: Start difference. First operand has 323 places, 466 transitions, 8272 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:38:35,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 498 transitions, 9832 flow [2024-06-27 21:38:37,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 498 transitions, 9725 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:37,701 INFO L231 Difference]: Finished difference. Result has 326 places, 473 transitions, 8567 flow [2024-06-27 21:38:37,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8567, PETRI_PLACES=326, PETRI_TRANSITIONS=473} [2024-06-27 21:38:37,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 21:38:37,701 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 473 transitions, 8567 flow [2024-06-27 21:38:37,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:37,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:37,702 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] [2024-06-27 21:38:37,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:38:37,702 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:37,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash -980825223, now seen corresponding path program 1 times [2024-06-27 21:38:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:37,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55975089] [2024-06-27 21:38:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:40,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:40,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55975089] [2024-06-27 21:38:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55975089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:40,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057327983] [2024-06-27 21:38:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:40,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 473 transitions, 8567 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:40,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:42,476 INFO L124 PetriNetUnfolderBase]: 3349/5412 cut-off events. [2024-06-27 21:38:42,476 INFO L125 PetriNetUnfolderBase]: For 761947/761947 co-relation queries the response was YES. [2024-06-27 21:38:42,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62391 conditions, 5412 events. 3349/5412 cut-off events. For 761947/761947 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33363 event pairs, 666 based on Foata normal form. 2/5413 useless extension candidates. Maximal degree in co-relation 62240. Up to 5060 conditions per place. [2024-06-27 21:38:42,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 43 changer transitions 0/514 dead transitions. [2024-06-27 21:38:42,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 514 transitions, 10066 flow [2024-06-27 21:38:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:38:42,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:38:42,556 INFO L175 Difference]: Start difference. First operand has 326 places, 473 transitions, 8567 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:38:42,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 514 transitions, 10066 flow [2024-06-27 21:38:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 514 transitions, 9820 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:44,236 INFO L231 Difference]: Finished difference. Result has 332 places, 478 transitions, 8623 flow [2024-06-27 21:38:44,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8321, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8623, PETRI_PLACES=332, PETRI_TRANSITIONS=478} [2024-06-27 21:38:44,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 21:38:44,237 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 478 transitions, 8623 flow [2024-06-27 21:38:44,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:44,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:44,238 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] [2024-06-27 21:38:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:38:44,238 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:44,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1729388299, now seen corresponding path program 2 times [2024-06-27 21:38:44,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:44,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107653308] [2024-06-27 21:38:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:46,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107653308] [2024-06-27 21:38:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107653308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:46,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:46,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187437178] [2024-06-27 21:38:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:47,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:47,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 478 transitions, 8623 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:49,445 INFO L124 PetriNetUnfolderBase]: 3390/5480 cut-off events. [2024-06-27 21:38:49,445 INFO L125 PetriNetUnfolderBase]: For 812136/812136 co-relation queries the response was YES. [2024-06-27 21:38:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63462 conditions, 5480 events. 3390/5480 cut-off events. For 812136/812136 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33877 event pairs, 639 based on Foata normal form. 11/5490 useless extension candidates. Maximal degree in co-relation 63308. Up to 5003 conditions per place. [2024-06-27 21:38:49,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 78 changer transitions 0/517 dead transitions. [2024-06-27 21:38:49,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 517 transitions, 10113 flow [2024-06-27 21:38:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:38:49,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:38:49,526 INFO L175 Difference]: Start difference. First operand has 332 places, 478 transitions, 8623 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:38:49,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 517 transitions, 10113 flow [2024-06-27 21:38:51,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 517 transitions, 9913 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:51,175 INFO L231 Difference]: Finished difference. Result has 338 places, 484 transitions, 8877 flow [2024-06-27 21:38:51,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8877, PETRI_PLACES=338, PETRI_TRANSITIONS=484} [2024-06-27 21:38:51,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 21:38:51,176 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 484 transitions, 8877 flow [2024-06-27 21:38:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:51,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:51,176 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] [2024-06-27 21:38:51,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:38:51,176 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:51,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash -983503499, now seen corresponding path program 1 times [2024-06-27 21:38:51,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:51,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859593721] [2024-06-27 21:38:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:54,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:54,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859593721] [2024-06-27 21:38:54,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859593721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:54,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:54,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:54,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452070190] [2024-06-27 21:38:54,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:54,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:54,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:54,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:54,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:38:54,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 484 transitions, 8877 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:54,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:54,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:38:54,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:56,741 INFO L124 PetriNetUnfolderBase]: 3464/5579 cut-off events. [2024-06-27 21:38:56,741 INFO L125 PetriNetUnfolderBase]: For 866401/866401 co-relation queries the response was YES. [2024-06-27 21:38:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66649 conditions, 5579 events. 3464/5579 cut-off events. For 866401/866401 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34425 event pairs, 633 based on Foata normal form. 6/5584 useless extension candidates. Maximal degree in co-relation 66492. Up to 4847 conditions per place. [2024-06-27 21:38:56,822 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 392 selfloop transitions, 138 changer transitions 0/535 dead transitions. [2024-06-27 21:38:56,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 535 transitions, 11371 flow [2024-06-27 21:38:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:38:56,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:56,823 INFO L175 Difference]: Start difference. First operand has 338 places, 484 transitions, 8877 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:38:56,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 535 transitions, 11371 flow [2024-06-27 21:38:58,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 535 transitions, 11131 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:58,624 INFO L231 Difference]: Finished difference. Result has 343 places, 496 transitions, 9616 flow [2024-06-27 21:38:58,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9616, PETRI_PLACES=343, PETRI_TRANSITIONS=496} [2024-06-27 21:38:58,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 21:38:58,625 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 496 transitions, 9616 flow [2024-06-27 21:38:58,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:58,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:58,625 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] [2024-06-27 21:38:58,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:38:58,626 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:58,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -980702339, now seen corresponding path program 2 times [2024-06-27 21:38:58,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:58,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952555831] [2024-06-27 21:38:58,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:58,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:01,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:01,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952555831] [2024-06-27 21:39:01,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952555831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:01,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:01,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560420216] [2024-06-27 21:39:01,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:01,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:01,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:01,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 496 transitions, 9616 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:01,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:01,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:04,094 INFO L124 PetriNetUnfolderBase]: 3484/5612 cut-off events. [2024-06-27 21:39:04,094 INFO L125 PetriNetUnfolderBase]: For 880213/880213 co-relation queries the response was YES. [2024-06-27 21:39:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68421 conditions, 5612 events. 3484/5612 cut-off events. For 880213/880213 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34634 event pairs, 680 based on Foata normal form. 4/5615 useless extension candidates. Maximal degree in co-relation 68261. Up to 5289 conditions per place. [2024-06-27 21:39:04,174 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 494 selfloop transitions, 28 changer transitions 0/527 dead transitions. [2024-06-27 21:39:04,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 527 transitions, 10976 flow [2024-06-27 21:39:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:39:04,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 21:39:04,176 INFO L175 Difference]: Start difference. First operand has 343 places, 496 transitions, 9616 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:39:04,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 527 transitions, 10976 flow [2024-06-27 21:39:06,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 527 transitions, 10591 flow, removed 138 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:06,056 INFO L231 Difference]: Finished difference. Result has 348 places, 500 transitions, 9506 flow [2024-06-27 21:39:06,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9231, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9506, PETRI_PLACES=348, PETRI_TRANSITIONS=500} [2024-06-27 21:39:06,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 21:39:06,057 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 500 transitions, 9506 flow [2024-06-27 21:39:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:06,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:06,057 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] [2024-06-27 21:39:06,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:39:06,058 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:06,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:06,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1731338705, now seen corresponding path program 3 times [2024-06-27 21:39:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795357147] [2024-06-27 21:39:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:06,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:09,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:09,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795357147] [2024-06-27 21:39:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795357147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:09,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671348632] [2024-06-27 21:39:09,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:09,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:09,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 500 transitions, 9506 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:09,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:09,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:09,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:11,863 INFO L124 PetriNetUnfolderBase]: 3528/5680 cut-off events. [2024-06-27 21:39:11,864 INFO L125 PetriNetUnfolderBase]: For 933948/933948 co-relation queries the response was YES. [2024-06-27 21:39:11,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69401 conditions, 5680 events. 3528/5680 cut-off events. For 933948/933948 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35101 event pairs, 688 based on Foata normal form. 12/5691 useless extension candidates. Maximal degree in co-relation 69239. Up to 5335 conditions per place. [2024-06-27 21:39:11,961 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 500 selfloop transitions, 27 changer transitions 0/532 dead transitions. [2024-06-27 21:39:11,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 532 transitions, 10920 flow [2024-06-27 21:39:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:39:11,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:39:11,963 INFO L175 Difference]: Start difference. First operand has 348 places, 500 transitions, 9506 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:39:11,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 532 transitions, 10920 flow [2024-06-27 21:39:14,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 532 transitions, 10689 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:14,260 INFO L231 Difference]: Finished difference. Result has 350 places, 503 transitions, 9509 flow [2024-06-27 21:39:14,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9275, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9509, PETRI_PLACES=350, PETRI_TRANSITIONS=503} [2024-06-27 21:39:14,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 21:39:14,261 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 503 transitions, 9509 flow [2024-06-27 21:39:14,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:14,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:14,261 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] [2024-06-27 21:39:14,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:39:14,261 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:14,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:14,262 INFO L85 PathProgramCache]: Analyzing trace with hash -870479115, now seen corresponding path program 3 times [2024-06-27 21:39:14,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:14,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855074073] [2024-06-27 21:39:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855074073] [2024-06-27 21:39:17,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855074073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:17,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459279335] [2024-06-27 21:39:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:17,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:17,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:17,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 503 transitions, 9509 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:17,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:17,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:17,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:19,407 INFO L124 PetriNetUnfolderBase]: 3548/5708 cut-off events. [2024-06-27 21:39:19,408 INFO L125 PetriNetUnfolderBase]: For 921979/921979 co-relation queries the response was YES. [2024-06-27 21:39:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69935 conditions, 5708 events. 3548/5708 cut-off events. For 921979/921979 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35277 event pairs, 683 based on Foata normal form. 4/5711 useless extension candidates. Maximal degree in co-relation 69772. Up to 5367 conditions per place. [2024-06-27 21:39:19,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 494 selfloop transitions, 36 changer transitions 0/535 dead transitions. [2024-06-27 21:39:19,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 535 transitions, 10897 flow [2024-06-27 21:39:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:39:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:39:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:39:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 21:39:19,503 INFO L175 Difference]: Start difference. First operand has 350 places, 503 transitions, 9509 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:39:19,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 535 transitions, 10897 flow [2024-06-27 21:39:22,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 535 transitions, 10777 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:22,034 INFO L231 Difference]: Finished difference. Result has 353 places, 507 transitions, 9695 flow [2024-06-27 21:39:22,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9389, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9695, PETRI_PLACES=353, PETRI_TRANSITIONS=507} [2024-06-27 21:39:22,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 21:39:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 507 transitions, 9695 flow [2024-06-27 21:39:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:22,035 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] [2024-06-27 21:39:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:39:22,036 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 212537313, now seen corresponding path program 4 times [2024-06-27 21:39:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317984087] [2024-06-27 21:39:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:24,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:24,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317984087] [2024-06-27 21:39:24,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317984087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:24,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:24,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:24,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075112473] [2024-06-27 21:39:24,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:24,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:24,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:24,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:24,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 507 transitions, 9695 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:24,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:24,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:27,032 INFO L124 PetriNetUnfolderBase]: 3578/5747 cut-off events. [2024-06-27 21:39:27,033 INFO L125 PetriNetUnfolderBase]: For 955497/955497 co-relation queries the response was YES. [2024-06-27 21:39:27,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71327 conditions, 5747 events. 3578/5747 cut-off events. For 955497/955497 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35579 event pairs, 649 based on Foata normal form. 6/5752 useless extension candidates. Maximal degree in co-relation 71163. Up to 5306 conditions per place. [2024-06-27 21:39:27,128 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 75 changer transitions 0/543 dead transitions. [2024-06-27 21:39:27,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 543 transitions, 11493 flow [2024-06-27 21:39:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:39:27,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:39:27,129 INFO L175 Difference]: Start difference. First operand has 353 places, 507 transitions, 9695 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:39:27,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 543 transitions, 11493 flow [2024-06-27 21:39:29,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 543 transitions, 11249 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:29,538 INFO L231 Difference]: Finished difference. Result has 354 places, 515 transitions, 10027 flow [2024-06-27 21:39:29,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9451, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10027, PETRI_PLACES=354, PETRI_TRANSITIONS=515} [2024-06-27 21:39:29,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 21:39:29,539 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 515 transitions, 10027 flow [2024-06-27 21:39:29,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:29,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:29,539 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] [2024-06-27 21:39:29,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:39:29,539 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:29,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -600046101, now seen corresponding path program 5 times [2024-06-27 21:39:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:29,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056736865] [2024-06-27 21:39:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:31,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:31,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056736865] [2024-06-27 21:39:31,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056736865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:31,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:31,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786231661] [2024-06-27 21:39:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:31,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:31,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 515 transitions, 10027 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:31,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:31,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:31,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:34,507 INFO L124 PetriNetUnfolderBase]: 3608/5789 cut-off events. [2024-06-27 21:39:34,508 INFO L125 PetriNetUnfolderBase]: For 975493/975493 co-relation queries the response was YES. [2024-06-27 21:39:34,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72474 conditions, 5789 events. 3608/5789 cut-off events. For 975493/975493 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 35783 event pairs, 649 based on Foata normal form. 4/5792 useless extension candidates. Maximal degree in co-relation 72309. Up to 5348 conditions per place. [2024-06-27 21:39:34,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 468 selfloop transitions, 80 changer transitions 0/553 dead transitions. [2024-06-27 21:39:34,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 553 transitions, 11814 flow [2024-06-27 21:39:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:34,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:39:34,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 21:39:34,595 INFO L175 Difference]: Start difference. First operand has 354 places, 515 transitions, 10027 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:39:34,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 553 transitions, 11814 flow [2024-06-27 21:39:36,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 553 transitions, 11343 flow, removed 164 selfloop flow, removed 7 redundant places. [2024-06-27 21:39:36,994 INFO L231 Difference]: Finished difference. Result has 358 places, 528 transitions, 10251 flow [2024-06-27 21:39:36,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9561, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10251, PETRI_PLACES=358, PETRI_TRANSITIONS=528} [2024-06-27 21:39:36,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 21:39:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 528 transitions, 10251 flow [2024-06-27 21:39:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:36,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:36,995 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] [2024-06-27 21:39:36,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:39:36,996 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:36,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -600050875, now seen corresponding path program 4 times [2024-06-27 21:39:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:36,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706957289] [2024-06-27 21:39:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:36,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:39,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:39,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706957289] [2024-06-27 21:39:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706957289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:39,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:39,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:39,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270692544] [2024-06-27 21:39:39,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:39,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:39,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 528 transitions, 10251 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:39,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:39,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:39,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:42,110 INFO L124 PetriNetUnfolderBase]: 3652/5861 cut-off events. [2024-06-27 21:39:42,111 INFO L125 PetriNetUnfolderBase]: For 1034826/1034826 co-relation queries the response was YES. [2024-06-27 21:39:42,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73241 conditions, 5861 events. 3652/5861 cut-off events. For 1034826/1034826 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36363 event pairs, 658 based on Foata normal form. 15/5875 useless extension candidates. Maximal degree in co-relation 73073. Up to 5447 conditions per place. [2024-06-27 21:39:42,208 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 57 changer transitions 0/560 dead transitions. [2024-06-27 21:39:42,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 560 transitions, 11829 flow [2024-06-27 21:39:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:39:42,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:39:42,209 INFO L175 Difference]: Start difference. First operand has 358 places, 528 transitions, 10251 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:39:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 560 transitions, 11829 flow [2024-06-27 21:39:44,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 560 transitions, 11277 flow, removed 214 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:44,983 INFO L231 Difference]: Finished difference. Result has 363 places, 534 transitions, 10064 flow [2024-06-27 21:39:44,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9699, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10064, PETRI_PLACES=363, PETRI_TRANSITIONS=534} [2024-06-27 21:39:44,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 21:39:44,983 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 534 transitions, 10064 flow [2024-06-27 21:39:44,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:44,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:44,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:39:44,984 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:44,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1445661361, now seen corresponding path program 6 times [2024-06-27 21:39:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:44,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73434433] [2024-06-27 21:39:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:47,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:47,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73434433] [2024-06-27 21:39:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73434433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:47,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:47,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:47,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949688176] [2024-06-27 21:39:47,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:47,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:47,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:47,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:47,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 534 transitions, 10064 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:47,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:47,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:47,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:49,807 INFO L124 PetriNetUnfolderBase]: 3687/5904 cut-off events. [2024-06-27 21:39:49,807 INFO L125 PetriNetUnfolderBase]: For 1015063/1015063 co-relation queries the response was YES. [2024-06-27 21:39:49,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73534 conditions, 5904 events. 3687/5904 cut-off events. For 1015063/1015063 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36517 event pairs, 656 based on Foata normal form. 4/5907 useless extension candidates. Maximal degree in co-relation 73364. Up to 5425 conditions per place. [2024-06-27 21:39:49,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 96 changer transitions 0/570 dead transitions. [2024-06-27 21:39:49,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 570 transitions, 11681 flow [2024-06-27 21:39:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:39:49,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 21:39:49,916 INFO L175 Difference]: Start difference. First operand has 363 places, 534 transitions, 10064 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:39:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 570 transitions, 11681 flow [2024-06-27 21:39:52,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 570 transitions, 11422 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:52,723 INFO L231 Difference]: Finished difference. Result has 367 places, 544 transitions, 10291 flow [2024-06-27 21:39:52,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9805, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10291, PETRI_PLACES=367, PETRI_TRANSITIONS=544} [2024-06-27 21:39:52,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 21:39:52,723 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 544 transitions, 10291 flow [2024-06-27 21:39:52,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:52,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:52,724 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] [2024-06-27 21:39:52,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:39:52,724 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:52,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:52,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2022047047, now seen corresponding path program 4 times [2024-06-27 21:39:52,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:52,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577609431] [2024-06-27 21:39:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:52,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:55,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577609431] [2024-06-27 21:39:55,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577609431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:55,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:55,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:55,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477743586] [2024-06-27 21:39:55,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:55,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:39:55,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 544 transitions, 10291 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:55,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:55,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:39:55,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:57,724 INFO L124 PetriNetUnfolderBase]: 3682/5889 cut-off events. [2024-06-27 21:39:57,724 INFO L125 PetriNetUnfolderBase]: For 1008945/1008945 co-relation queries the response was YES. [2024-06-27 21:39:57,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73394 conditions, 5889 events. 3682/5889 cut-off events. For 1008945/1008945 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36402 event pairs, 674 based on Foata normal form. 2/5881 useless extension candidates. Maximal degree in co-relation 73222. Up to 5565 conditions per place. [2024-06-27 21:39:57,826 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 514 selfloop transitions, 39 changer transitions 0/558 dead transitions. [2024-06-27 21:39:57,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 558 transitions, 11437 flow [2024-06-27 21:39:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:39:57,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 21:39:57,827 INFO L175 Difference]: Start difference. First operand has 367 places, 544 transitions, 10291 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:39:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 558 transitions, 11437 flow [2024-06-27 21:40:00,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 558 transitions, 11096 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:00,324 INFO L231 Difference]: Finished difference. Result has 369 places, 544 transitions, 10033 flow [2024-06-27 21:40:00,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9950, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10033, PETRI_PLACES=369, PETRI_TRANSITIONS=544} [2024-06-27 21:40:00,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 21:40:00,325 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 544 transitions, 10033 flow [2024-06-27 21:40:00,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:00,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:00,325 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] [2024-06-27 21:40:00,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:40:00,325 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:00,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 549229839, now seen corresponding path program 3 times [2024-06-27 21:40:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:00,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012552981] [2024-06-27 21:40:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:00,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:03,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012552981] [2024-06-27 21:40:03,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012552981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:03,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:03,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934864235] [2024-06-27 21:40:03,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:03,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:03,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:03,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 544 transitions, 10033 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:03,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:03,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:03,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:05,706 INFO L124 PetriNetUnfolderBase]: 3687/5912 cut-off events. [2024-06-27 21:40:05,706 INFO L125 PetriNetUnfolderBase]: For 1015402/1015402 co-relation queries the response was YES. [2024-06-27 21:40:05,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73157 conditions, 5912 events. 3687/5912 cut-off events. For 1015402/1015402 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36644 event pairs, 703 based on Foata normal form. 1/5909 useless extension candidates. Maximal degree in co-relation 72984. Up to 5578 conditions per place. [2024-06-27 21:40:05,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 533 selfloop transitions, 30 changer transitions 0/568 dead transitions. [2024-06-27 21:40:05,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 568 transitions, 11411 flow [2024-06-27 21:40:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:40:05,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:40:05,804 INFO L175 Difference]: Start difference. First operand has 369 places, 544 transitions, 10033 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:40:05,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 568 transitions, 11411 flow [2024-06-27 21:40:08,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 568 transitions, 11273 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:08,484 INFO L231 Difference]: Finished difference. Result has 369 places, 547 transitions, 10153 flow [2024-06-27 21:40:08,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9895, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10153, PETRI_PLACES=369, PETRI_TRANSITIONS=547} [2024-06-27 21:40:08,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 21:40:08,485 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 547 transitions, 10153 flow [2024-06-27 21:40:08,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:08,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:08,485 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] [2024-06-27 21:40:08,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:40:08,486 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:08,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1158965833, now seen corresponding path program 4 times [2024-06-27 21:40:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:08,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918050337] [2024-06-27 21:40:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:08,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:11,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918050337] [2024-06-27 21:40:11,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918050337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:11,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:11,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:40:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467008745] [2024-06-27 21:40:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:40:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:40:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:40:11,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:11,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 547 transitions, 10153 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:11,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:11,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:11,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:13,760 INFO L124 PetriNetUnfolderBase]: 3684/5908 cut-off events. [2024-06-27 21:40:13,761 INFO L125 PetriNetUnfolderBase]: For 1031413/1031413 co-relation queries the response was YES. [2024-06-27 21:40:13,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73339 conditions, 5908 events. 3684/5908 cut-off events. For 1031413/1031413 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36618 event pairs, 703 based on Foata normal form. 1/5905 useless extension candidates. Maximal degree in co-relation 73166. Up to 5556 conditions per place. [2024-06-27 21:40:13,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 43 changer transitions 0/569 dead transitions. [2024-06-27 21:40:13,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 569 transitions, 11535 flow [2024-06-27 21:40:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 21:40:13,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:40:13,861 INFO L175 Difference]: Start difference. First operand has 369 places, 547 transitions, 10153 flow. Second operand 8 states and 128 transitions. [2024-06-27 21:40:13,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 569 transitions, 11535 flow [2024-06-27 21:40:16,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 569 transitions, 11299 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-27 21:40:16,589 INFO L231 Difference]: Finished difference. Result has 372 places, 552 transitions, 10241 flow [2024-06-27 21:40:16,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9917, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10241, PETRI_PLACES=372, PETRI_TRANSITIONS=552} [2024-06-27 21:40:16,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 21:40:16,590 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 552 transitions, 10241 flow [2024-06-27 21:40:16,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:16,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:16,591 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] [2024-06-27 21:40:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:40:16,591 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:16,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash 102570677, now seen corresponding path program 5 times [2024-06-27 21:40:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:16,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429002711] [2024-06-27 21:40:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:19,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:19,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429002711] [2024-06-27 21:40:19,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429002711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:19,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:19,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434399334] [2024-06-27 21:40:19,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:19,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:19,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:19,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:19,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 552 transitions, 10241 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:21,539 INFO L124 PetriNetUnfolderBase]: 3705/5929 cut-off events. [2024-06-27 21:40:21,539 INFO L125 PetriNetUnfolderBase]: For 1071318/1071318 co-relation queries the response was YES. [2024-06-27 21:40:21,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74526 conditions, 5929 events. 3705/5929 cut-off events. For 1071318/1071318 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 36726 event pairs, 703 based on Foata normal form. 2/5927 useless extension candidates. Maximal degree in co-relation 74351. Up to 5496 conditions per place. [2024-06-27 21:40:21,629 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 506 selfloop transitions, 78 changer transitions 0/589 dead transitions. [2024-06-27 21:40:21,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 589 transitions, 11949 flow [2024-06-27 21:40:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 21:40:21,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 21:40:21,630 INFO L175 Difference]: Start difference. First operand has 372 places, 552 transitions, 10241 flow. Second operand 9 states and 156 transitions. [2024-06-27 21:40:21,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 589 transitions, 11949 flow [2024-06-27 21:40:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 589 transitions, 11701 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:24,063 INFO L231 Difference]: Finished difference. Result has 376 places, 556 transitions, 10394 flow [2024-06-27 21:40:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9993, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10394, PETRI_PLACES=376, PETRI_TRANSITIONS=556} [2024-06-27 21:40:24,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-27 21:40:24,063 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 556 transitions, 10394 flow [2024-06-27 21:40:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:24,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:24,064 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] [2024-06-27 21:40:24,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:40:24,064 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1529974949, now seen corresponding path program 6 times [2024-06-27 21:40:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479613795] [2024-06-27 21:40:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:26,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479613795] [2024-06-27 21:40:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479613795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196306382] [2024-06-27 21:40:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:26,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:26,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 556 transitions, 10394 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:26,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:26,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:26,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:28,811 INFO L124 PetriNetUnfolderBase]: 3726/5962 cut-off events. [2024-06-27 21:40:28,812 INFO L125 PetriNetUnfolderBase]: For 1106719/1106719 co-relation queries the response was YES. [2024-06-27 21:40:28,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75613 conditions, 5962 events. 3726/5962 cut-off events. For 1106719/1106719 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 36957 event pairs, 702 based on Foata normal form. 2/5960 useless extension candidates. Maximal degree in co-relation 75437. Up to 5586 conditions per place. [2024-06-27 21:40:28,911 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 50 changer transitions 0/594 dead transitions. [2024-06-27 21:40:28,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 594 transitions, 12149 flow [2024-06-27 21:40:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 21:40:28,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 21:40:28,912 INFO L175 Difference]: Start difference. First operand has 376 places, 556 transitions, 10394 flow. Second operand 9 states and 155 transitions. [2024-06-27 21:40:28,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 594 transitions, 12149 flow [2024-06-27 21:40:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 594 transitions, 11890 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:31,589 INFO L231 Difference]: Finished difference. Result has 381 places, 561 transitions, 10524 flow [2024-06-27 21:40:31,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10135, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10524, PETRI_PLACES=381, PETRI_TRANSITIONS=561} [2024-06-27 21:40:31,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 21:40:31,590 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 561 transitions, 10524 flow [2024-06-27 21:40:31,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:31,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:31,590 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] [2024-06-27 21:40:31,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:40:31,590 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:31,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:31,591 INFO L85 PathProgramCache]: Analyzing trace with hash 740992249, now seen corresponding path program 7 times [2024-06-27 21:40:31,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:31,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711387456] [2024-06-27 21:40:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:31,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711387456] [2024-06-27 21:40:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711387456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:35,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:35,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768814084] [2024-06-27 21:40:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:35,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:35,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 561 transitions, 10524 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:35,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:35,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:35,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:37,239 INFO L124 PetriNetUnfolderBase]: 3775/6031 cut-off events. [2024-06-27 21:40:37,239 INFO L125 PetriNetUnfolderBase]: For 1188939/1188939 co-relation queries the response was YES. [2024-06-27 21:40:37,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77150 conditions, 6031 events. 3775/6031 cut-off events. For 1188939/1188939 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 37442 event pairs, 692 based on Foata normal form. 13/6034 useless extension candidates. Maximal degree in co-relation 76971. Up to 5505 conditions per place. [2024-06-27 21:40:37,340 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 97 changer transitions 0/598 dead transitions. [2024-06-27 21:40:37,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 598 transitions, 12356 flow [2024-06-27 21:40:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:40:37,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:40:37,342 INFO L175 Difference]: Start difference. First operand has 381 places, 561 transitions, 10524 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:40:37,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 598 transitions, 12356 flow [2024-06-27 21:40:40,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 598 transitions, 12063 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:40,441 INFO L231 Difference]: Finished difference. Result has 386 places, 568 transitions, 10897 flow [2024-06-27 21:40:40,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10291, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10897, PETRI_PLACES=386, PETRI_TRANSITIONS=568} [2024-06-27 21:40:40,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 21:40:40,442 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 568 transitions, 10897 flow [2024-06-27 21:40:40,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:40,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:40,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:40:40,442 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:40,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1736393009, now seen corresponding path program 8 times [2024-06-27 21:40:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:40,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553312687] [2024-06-27 21:40:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553312687] [2024-06-27 21:40:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553312687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:43,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:43,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336817040] [2024-06-27 21:40:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:43,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:43,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 568 transitions, 10897 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:46,072 INFO L124 PetriNetUnfolderBase]: 3783/6045 cut-off events. [2024-06-27 21:40:46,072 INFO L125 PetriNetUnfolderBase]: For 1176116/1176116 co-relation queries the response was YES. [2024-06-27 21:40:46,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77972 conditions, 6045 events. 3783/6045 cut-off events. For 1176116/1176116 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 37541 event pairs, 688 based on Foata normal form. 2/6037 useless extension candidates. Maximal degree in co-relation 77790. Up to 5422 conditions per place. [2024-06-27 21:40:46,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 460 selfloop transitions, 141 changer transitions 0/606 dead transitions. [2024-06-27 21:40:46,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 606 transitions, 12609 flow [2024-06-27 21:40:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:40:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:40:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 21:40:46,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-27 21:40:46,167 INFO L175 Difference]: Start difference. First operand has 386 places, 568 transitions, 10897 flow. Second operand 10 states and 179 transitions. [2024-06-27 21:40:46,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 606 transitions, 12609 flow [2024-06-27 21:40:49,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 606 transitions, 12288 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:49,024 INFO L231 Difference]: Finished difference. Result has 391 places, 570 transitions, 10943 flow [2024-06-27 21:40:49,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10578, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10943, PETRI_PLACES=391, PETRI_TRANSITIONS=570} [2024-06-27 21:40:49,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 21:40:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 570 transitions, 10943 flow [2024-06-27 21:40:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:40:49,025 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:49,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash -82723955, now seen corresponding path program 7 times [2024-06-27 21:40:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:49,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433487619] [2024-06-27 21:40:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433487619] [2024-06-27 21:40:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433487619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:51,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599957222] [2024-06-27 21:40:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:51,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:51,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:40:51,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 570 transitions, 10943 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:51,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:51,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:40:51,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:53,965 INFO L124 PetriNetUnfolderBase]: 3825/6111 cut-off events. [2024-06-27 21:40:53,965 INFO L125 PetriNetUnfolderBase]: For 1203137/1203137 co-relation queries the response was YES. [2024-06-27 21:40:54,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79722 conditions, 6111 events. 3825/6111 cut-off events. For 1203137/1203137 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37983 event pairs, 719 based on Foata normal form. 2/6109 useless extension candidates. Maximal degree in co-relation 79539. Up to 5466 conditions per place. [2024-06-27 21:40:54,067 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 168 changer transitions 0/662 dead transitions. [2024-06-27 21:40:54,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 662 transitions, 14625 flow [2024-06-27 21:40:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:40:54,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:40:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:40:54,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:40:54,068 INFO L175 Difference]: Start difference. First operand has 391 places, 570 transitions, 10943 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:40:54,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 662 transitions, 14625 flow [2024-06-27 21:40:57,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 662 transitions, 14338 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:40:57,934 INFO L231 Difference]: Finished difference. Result has 395 places, 624 transitions, 12820 flow [2024-06-27 21:40:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10656, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12820, PETRI_PLACES=395, PETRI_TRANSITIONS=624} [2024-06-27 21:40:57,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 21:40:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 624 transitions, 12820 flow [2024-06-27 21:40:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:57,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:57,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:40:57,935 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:57,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 555694827, now seen corresponding path program 8 times [2024-06-27 21:40:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076875589] [2024-06-27 21:40:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:00,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:00,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076875589] [2024-06-27 21:41:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076875589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005959404] [2024-06-27 21:41:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:00,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 624 transitions, 12820 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:00,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:00,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:02,866 INFO L124 PetriNetUnfolderBase]: 3843/6136 cut-off events. [2024-06-27 21:41:02,866 INFO L125 PetriNetUnfolderBase]: For 1240379/1240379 co-relation queries the response was YES. [2024-06-27 21:41:02,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81568 conditions, 6136 events. 3843/6136 cut-off events. For 1240379/1240379 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 38145 event pairs, 714 based on Foata normal form. 2/6134 useless extension candidates. Maximal degree in co-relation 81381. Up to 5652 conditions per place. [2024-06-27 21:41:02,965 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 121 changer transitions 0/666 dead transitions. [2024-06-27 21:41:02,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 666 transitions, 15108 flow [2024-06-27 21:41:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:41:02,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 21:41:02,967 INFO L175 Difference]: Start difference. First operand has 395 places, 624 transitions, 12820 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:41:02,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 666 transitions, 15108 flow [2024-06-27 21:41:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 666 transitions, 14800 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-06-27 21:41:06,368 INFO L231 Difference]: Finished difference. Result has 402 places, 630 transitions, 13120 flow [2024-06-27 21:41:06,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12552, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13120, PETRI_PLACES=402, PETRI_TRANSITIONS=630} [2024-06-27 21:41:06,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 21:41:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 630 transitions, 13120 flow [2024-06-27 21:41:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:06,369 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] [2024-06-27 21:41:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:41:06,369 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:06,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1286409683, now seen corresponding path program 9 times [2024-06-27 21:41:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824955238] [2024-06-27 21:41:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:09,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824955238] [2024-06-27 21:41:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824955238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101883600] [2024-06-27 21:41:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:09,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:09,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:09,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:09,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 630 transitions, 13120 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:09,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:09,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:09,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:12,107 INFO L124 PetriNetUnfolderBase]: 3863/6166 cut-off events. [2024-06-27 21:41:12,107 INFO L125 PetriNetUnfolderBase]: For 1265911/1265911 co-relation queries the response was YES. [2024-06-27 21:41:12,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82047 conditions, 6166 events. 3863/6166 cut-off events. For 1265911/1265911 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38303 event pairs, 712 based on Foata normal form. 4/6166 useless extension candidates. Maximal degree in co-relation 81857. Up to 5799 conditions per place. [2024-06-27 21:41:12,205 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 615 selfloop transitions, 39 changer transitions 0/659 dead transitions. [2024-06-27 21:41:12,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 659 transitions, 14786 flow [2024-06-27 21:41:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:41:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:41:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:41:12,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 21:41:12,206 INFO L175 Difference]: Start difference. First operand has 402 places, 630 transitions, 13120 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:41:12,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 659 transitions, 14786 flow [2024-06-27 21:41:15,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 659 transitions, 14426 flow, removed 119 selfloop flow, removed 4 redundant places. [2024-06-27 21:41:15,709 INFO L231 Difference]: Finished difference. Result has 408 places, 634 transitions, 13106 flow [2024-06-27 21:41:15,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12760, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13106, PETRI_PLACES=408, PETRI_TRANSITIONS=634} [2024-06-27 21:41:15,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 21:41:15,710 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 634 transitions, 13106 flow [2024-06-27 21:41:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:15,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:15,710 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] [2024-06-27 21:41:15,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:41:15,710 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:15,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 743788759, now seen corresponding path program 9 times [2024-06-27 21:41:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347999837] [2024-06-27 21:41:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:18,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:18,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347999837] [2024-06-27 21:41:18,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347999837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:18,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012822092] [2024-06-27 21:41:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:18,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:18,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:18,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:18,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 634 transitions, 13106 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:18,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:18,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:18,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:21,401 INFO L124 PetriNetUnfolderBase]: 3899/6220 cut-off events. [2024-06-27 21:41:21,401 INFO L125 PetriNetUnfolderBase]: For 1332022/1332022 co-relation queries the response was YES. [2024-06-27 21:41:21,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83580 conditions, 6220 events. 3899/6220 cut-off events. For 1332022/1332022 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 38654 event pairs, 722 based on Foata normal form. 10/6226 useless extension candidates. Maximal degree in co-relation 83388. Up to 5849 conditions per place. [2024-06-27 21:41:21,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 624 selfloop transitions, 33 changer transitions 0/662 dead transitions. [2024-06-27 21:41:21,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 662 transitions, 14760 flow [2024-06-27 21:41:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:41:21,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 21:41:21,498 INFO L175 Difference]: Start difference. First operand has 408 places, 634 transitions, 13106 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:41:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 662 transitions, 14760 flow [2024-06-27 21:41:25,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 662 transitions, 14364 flow, removed 162 selfloop flow, removed 8 redundant places. [2024-06-27 21:41:25,166 INFO L231 Difference]: Finished difference. Result has 409 places, 636 transitions, 12918 flow [2024-06-27 21:41:25,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12710, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12918, PETRI_PLACES=409, PETRI_TRANSITIONS=636} [2024-06-27 21:41:25,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-27 21:41:25,166 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 636 transitions, 12918 flow [2024-06-27 21:41:25,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:25,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:25,167 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] [2024-06-27 21:41:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:41:25,167 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:25,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 387612887, now seen corresponding path program 10 times [2024-06-27 21:41:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:25,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734117431] [2024-06-27 21:41:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:25,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:27,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734117431] [2024-06-27 21:41:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734117431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:27,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356206144] [2024-06-27 21:41:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:27,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:27,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:27,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 636 transitions, 12918 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:27,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:27,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:29,963 INFO L124 PetriNetUnfolderBase]: 3920/6271 cut-off events. [2024-06-27 21:41:29,963 INFO L125 PetriNetUnfolderBase]: For 1323538/1323538 co-relation queries the response was YES. [2024-06-27 21:41:30,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84102 conditions, 6271 events. 3920/6271 cut-off events. For 1323538/1323538 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39074 event pairs, 613 based on Foata normal form. 2/6269 useless extension candidates. Maximal degree in co-relation 83909. Up to 5615 conditions per place. [2024-06-27 21:41:30,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 571 selfloop transitions, 103 changer transitions 0/679 dead transitions. [2024-06-27 21:41:30,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 679 transitions, 15187 flow [2024-06-27 21:41:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:41:30,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 21:41:30,076 INFO L175 Difference]: Start difference. First operand has 409 places, 636 transitions, 12918 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:41:30,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 679 transitions, 15187 flow [2024-06-27 21:41:34,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 679 transitions, 15065 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:41:34,224 INFO L231 Difference]: Finished difference. Result has 412 places, 644 transitions, 13438 flow [2024-06-27 21:41:34,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12796, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13438, PETRI_PLACES=412, PETRI_TRANSITIONS=644} [2024-06-27 21:41:34,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 21:41:34,224 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 644 transitions, 13438 flow [2024-06-27 21:41:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:34,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:34,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:41:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:41:34,225 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:34,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 970948699, now seen corresponding path program 11 times [2024-06-27 21:41:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:34,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890777449] [2024-06-27 21:41:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:37,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890777449] [2024-06-27 21:41:37,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890777449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645559421] [2024-06-27 21:41:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:37,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:37,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:37,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 644 transitions, 13438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:37,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:37,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:37,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:39,702 INFO L124 PetriNetUnfolderBase]: 3928/6285 cut-off events. [2024-06-27 21:41:39,702 INFO L125 PetriNetUnfolderBase]: For 1342489/1342489 co-relation queries the response was YES. [2024-06-27 21:41:39,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84865 conditions, 6285 events. 3928/6285 cut-off events. For 1342489/1342489 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39198 event pairs, 614 based on Foata normal form. 2/6283 useless extension candidates. Maximal degree in co-relation 84670. Up to 5623 conditions per place. [2024-06-27 21:41:39,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 107 changer transitions 0/677 dead transitions. [2024-06-27 21:41:39,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 677 transitions, 15293 flow [2024-06-27 21:41:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:41:39,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 21:41:39,807 INFO L175 Difference]: Start difference. First operand has 412 places, 644 transitions, 13438 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:41:39,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 677 transitions, 15293 flow [2024-06-27 21:41:44,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 677 transitions, 14888 flow, removed 161 selfloop flow, removed 4 redundant places. [2024-06-27 21:41:44,054 INFO L231 Difference]: Finished difference. Result has 417 places, 647 transitions, 13453 flow [2024-06-27 21:41:44,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13125, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13453, PETRI_PLACES=417, PETRI_TRANSITIONS=647} [2024-06-27 21:41:44,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-27 21:41:44,055 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 647 transitions, 13453 flow [2024-06-27 21:41:44,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:44,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:44,055 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] [2024-06-27 21:41:44,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:41:44,055 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:44,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash 271835631, now seen corresponding path program 12 times [2024-06-27 21:41:44,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:44,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942747153] [2024-06-27 21:41:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:44,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:46,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:46,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942747153] [2024-06-27 21:41:46,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942747153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:46,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:46,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:46,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149003554] [2024-06-27 21:41:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:46,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:46,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:46,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:46,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 647 transitions, 13453 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:46,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:46,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:46,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:49,512 INFO L124 PetriNetUnfolderBase]: 3995/6390 cut-off events. [2024-06-27 21:41:49,512 INFO L125 PetriNetUnfolderBase]: For 1410019/1410019 co-relation queries the response was YES. [2024-06-27 21:41:49,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87421 conditions, 6390 events. 3995/6390 cut-off events. For 1410019/1410019 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 39957 event pairs, 738 based on Foata normal form. 2/6388 useless extension candidates. Maximal degree in co-relation 87224. Up to 5830 conditions per place. [2024-06-27 21:41:49,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 605 selfloop transitions, 73 changer transitions 0/683 dead transitions. [2024-06-27 21:41:49,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 683 transitions, 15763 flow [2024-06-27 21:41:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:41:49,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-27 21:41:49,617 INFO L175 Difference]: Start difference. First operand has 417 places, 647 transitions, 13453 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:41:49,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 683 transitions, 15763 flow [2024-06-27 21:41:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 683 transitions, 15504 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 21:41:54,210 INFO L231 Difference]: Finished difference. Result has 422 places, 654 transitions, 13676 flow [2024-06-27 21:41:54,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13199, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13676, PETRI_PLACES=422, PETRI_TRANSITIONS=654} [2024-06-27 21:41:54,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 21:41:54,210 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 654 transitions, 13676 flow [2024-06-27 21:41:54,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:54,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:41:54,210 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] [2024-06-27 21:41:54,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:41:54,210 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:41:54,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:41:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash 271954795, now seen corresponding path program 10 times [2024-06-27 21:41:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:41:54,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503613688] [2024-06-27 21:41:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:41:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:41:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:41:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:41:56,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:41:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503613688] [2024-06-27 21:41:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503613688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:41:56,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:41:56,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:41:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894787921] [2024-06-27 21:41:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:41:56,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:41:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:41:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:41:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:41:56,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:41:56,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 654 transitions, 13676 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:41:56,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:41:56,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:41:56,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:41:59,653 INFO L124 PetriNetUnfolderBase]: 4005/6410 cut-off events. [2024-06-27 21:41:59,653 INFO L125 PetriNetUnfolderBase]: For 1431294/1431294 co-relation queries the response was YES. [2024-06-27 21:41:59,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87783 conditions, 6410 events. 4005/6410 cut-off events. For 1431294/1431294 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40311 event pairs, 744 based on Foata normal form. 2/6411 useless extension candidates. Maximal degree in co-relation 87584. Up to 6058 conditions per place. [2024-06-27 21:41:59,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 631 selfloop transitions, 47 changer transitions 0/683 dead transitions. [2024-06-27 21:41:59,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 683 transitions, 15300 flow [2024-06-27 21:41:59,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:41:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:41:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:41:59,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 21:41:59,773 INFO L175 Difference]: Start difference. First operand has 422 places, 654 transitions, 13676 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:41:59,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 683 transitions, 15300 flow [2024-06-27 21:42:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 683 transitions, 15116 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 21:42:04,156 INFO L231 Difference]: Finished difference. Result has 426 places, 657 transitions, 13734 flow [2024-06-27 21:42:04,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13492, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13734, PETRI_PLACES=426, PETRI_TRANSITIONS=657} [2024-06-27 21:42:04,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 21:42:04,157 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 657 transitions, 13734 flow [2024-06-27 21:42:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:04,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:04,157 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] [2024-06-27 21:42:04,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:42:04,157 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:04,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash 456836507, now seen corresponding path program 13 times [2024-06-27 21:42:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:04,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91486370] [2024-06-27 21:42:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:04,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:06,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91486370] [2024-06-27 21:42:06,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91486370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:06,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:06,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:06,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285098303] [2024-06-27 21:42:06,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:06,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:06,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:06,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:06,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 657 transitions, 13734 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:06,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:06,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:06,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:09,313 INFO L124 PetriNetUnfolderBase]: 4000/6395 cut-off events. [2024-06-27 21:42:09,313 INFO L125 PetriNetUnfolderBase]: For 1433759/1433759 co-relation queries the response was YES. [2024-06-27 21:42:09,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87267 conditions, 6395 events. 4000/6395 cut-off events. For 1433759/1433759 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40068 event pairs, 742 based on Foata normal form. 2/6393 useless extension candidates. Maximal degree in co-relation 87067. Up to 5969 conditions per place. [2024-06-27 21:42:09,427 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 599 selfloop transitions, 76 changer transitions 0/680 dead transitions. [2024-06-27 21:42:09,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 680 transitions, 15154 flow [2024-06-27 21:42:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:42:09,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 21:42:09,429 INFO L175 Difference]: Start difference. First operand has 426 places, 657 transitions, 13734 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:42:09,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 680 transitions, 15154 flow [2024-06-27 21:42:13,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 680 transitions, 14899 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:13,907 INFO L231 Difference]: Finished difference. Result has 427 places, 657 transitions, 13636 flow [2024-06-27 21:42:13,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13479, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13636, PETRI_PLACES=427, PETRI_TRANSITIONS=657} [2024-06-27 21:42:13,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-27 21:42:13,907 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 657 transitions, 13636 flow [2024-06-27 21:42:13,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:13,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:13,907 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] [2024-06-27 21:42:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:42:13,908 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:13,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash 523056683, now seen corresponding path program 11 times [2024-06-27 21:42:13,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:13,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405293628] [2024-06-27 21:42:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:13,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:16,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405293628] [2024-06-27 21:42:16,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405293628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:16,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:16,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101311466] [2024-06-27 21:42:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:16,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:16,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:16,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 657 transitions, 13636 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:16,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:16,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:19,239 INFO L124 PetriNetUnfolderBase]: 4010/6415 cut-off events. [2024-06-27 21:42:19,239 INFO L125 PetriNetUnfolderBase]: For 1451901/1451901 co-relation queries the response was YES. [2024-06-27 21:42:19,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87511 conditions, 6415 events. 4010/6415 cut-off events. For 1451901/1451901 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40282 event pairs, 747 based on Foata normal form. 2/6413 useless extension candidates. Maximal degree in co-relation 87311. Up to 5726 conditions per place. [2024-06-27 21:42:19,345 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 179 changer transitions 0/694 dead transitions. [2024-06-27 21:42:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 694 transitions, 15822 flow [2024-06-27 21:42:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 21:42:19,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 21:42:19,347 INFO L175 Difference]: Start difference. First operand has 427 places, 657 transitions, 13636 flow. Second operand 9 states and 159 transitions. [2024-06-27 21:42:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 694 transitions, 15822 flow [2024-06-27 21:42:24,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 694 transitions, 15613 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 21:42:24,182 INFO L231 Difference]: Finished difference. Result has 429 places, 660 transitions, 13933 flow [2024-06-27 21:42:24,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13427, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13933, PETRI_PLACES=429, PETRI_TRANSITIONS=660} [2024-06-27 21:42:24,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 21:42:24,182 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 660 transitions, 13933 flow [2024-06-27 21:42:24,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:24,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:24,183 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] [2024-06-27 21:42:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:42:24,183 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:24,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:24,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1335685555, now seen corresponding path program 14 times [2024-06-27 21:42:24,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:24,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724103490] [2024-06-27 21:42:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:24,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724103490] [2024-06-27 21:42:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724103490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:27,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:27,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:27,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449852149] [2024-06-27 21:42:27,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:27,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:27,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:27,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 660 transitions, 13933 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:27,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:27,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:27,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:29,980 INFO L124 PetriNetUnfolderBase]: 4051/6480 cut-off events. [2024-06-27 21:42:29,980 INFO L125 PetriNetUnfolderBase]: For 1518706/1518706 co-relation queries the response was YES. [2024-06-27 21:42:30,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89666 conditions, 6480 events. 4051/6480 cut-off events. For 1518706/1518706 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40636 event pairs, 755 based on Foata normal form. 2/6478 useless extension candidates. Maximal degree in co-relation 89465. Up to 5937 conditions per place. [2024-06-27 21:42:30,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 58 changer transitions 0/689 dead transitions. [2024-06-27 21:42:30,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 689 transitions, 16029 flow [2024-06-27 21:42:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:42:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:42:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:42:30,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 21:42:30,090 INFO L175 Difference]: Start difference. First operand has 429 places, 660 transitions, 13933 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:42:30,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 689 transitions, 16029 flow [2024-06-27 21:42:35,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 689 transitions, 15689 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-27 21:42:35,011 INFO L231 Difference]: Finished difference. Result has 435 places, 665 transitions, 14036 flow [2024-06-27 21:42:35,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13593, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14036, PETRI_PLACES=435, PETRI_TRANSITIONS=665} [2024-06-27 21:42:35,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 21:42:35,011 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 665 transitions, 14036 flow [2024-06-27 21:42:35,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:35,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:35,012 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] [2024-06-27 21:42:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:42:35,012 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:35,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1150684679, now seen corresponding path program 15 times [2024-06-27 21:42:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:35,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438714117] [2024-06-27 21:42:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:38,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:38,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438714117] [2024-06-27 21:42:38,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438714117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:38,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:38,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:38,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710360959] [2024-06-27 21:42:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:38,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:38,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:38,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 665 transitions, 14036 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:38,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:38,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:38,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:41,060 INFO L124 PetriNetUnfolderBase]: 4046/6477 cut-off events. [2024-06-27 21:42:41,060 INFO L125 PetriNetUnfolderBase]: For 1525768/1525768 co-relation queries the response was YES. [2024-06-27 21:42:41,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89290 conditions, 6477 events. 4046/6477 cut-off events. For 1525768/1525768 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40730 event pairs, 754 based on Foata normal form. 2/6475 useless extension candidates. Maximal degree in co-relation 89086. Up to 6076 conditions per place. [2024-06-27 21:42:41,168 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 629 selfloop transitions, 52 changer transitions 0/686 dead transitions. [2024-06-27 21:42:41,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 686 transitions, 15521 flow [2024-06-27 21:42:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:42:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:42:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:42:41,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:42:41,169 INFO L175 Difference]: Start difference. First operand has 435 places, 665 transitions, 14036 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:42:41,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 686 transitions, 15521 flow [2024-06-27 21:42:46,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 686 transitions, 15259 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-27 21:42:46,836 INFO L231 Difference]: Finished difference. Result has 441 places, 666 transitions, 13950 flow [2024-06-27 21:42:46,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13794, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13950, PETRI_PLACES=441, PETRI_TRANSITIONS=666} [2024-06-27 21:42:46,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 21:42:46,836 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 666 transitions, 13950 flow [2024-06-27 21:42:46,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:46,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:46,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:42:46,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:42:46,837 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:46,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1150684555, now seen corresponding path program 12 times [2024-06-27 21:42:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:46,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30215216] [2024-06-27 21:42:46,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:42:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:42:49,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:42:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30215216] [2024-06-27 21:42:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30215216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:42:49,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:42:49,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:42:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713952363] [2024-06-27 21:42:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:42:49,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:42:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:42:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:42:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:42:49,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:42:49,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 666 transitions, 13950 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:49,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:42:49,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:42:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:42:53,055 INFO L124 PetriNetUnfolderBase]: 4040/6473 cut-off events. [2024-06-27 21:42:53,055 INFO L125 PetriNetUnfolderBase]: For 1517780/1517780 co-relation queries the response was YES. [2024-06-27 21:42:53,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88617 conditions, 6473 events. 4040/6473 cut-off events. For 1517780/1517780 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40730 event pairs, 741 based on Foata normal form. 2/6471 useless extension candidates. Maximal degree in co-relation 88411. Up to 5950 conditions per place. [2024-06-27 21:42:53,164 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 608 selfloop transitions, 82 changer transitions 0/695 dead transitions. [2024-06-27 21:42:53,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 695 transitions, 15682 flow [2024-06-27 21:42:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:42:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:42:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 21:42:53,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 21:42:53,165 INFO L175 Difference]: Start difference. First operand has 441 places, 666 transitions, 13950 flow. Second operand 11 states and 176 transitions. [2024-06-27 21:42:53,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 695 transitions, 15682 flow [2024-06-27 21:42:57,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 695 transitions, 15488 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 21:42:57,530 INFO L231 Difference]: Finished difference. Result has 444 places, 669 transitions, 14119 flow [2024-06-27 21:42:57,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13756, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14119, PETRI_PLACES=444, PETRI_TRANSITIONS=669} [2024-06-27 21:42:57,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 21:42:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 669 transitions, 14119 flow [2024-06-27 21:42:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:42:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:42:57,531 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] [2024-06-27 21:42:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:42:57,531 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:42:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:42:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 128670495, now seen corresponding path program 13 times [2024-06-27 21:42:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:42:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771167613] [2024-06-27 21:42:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:42:57,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:42:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771167613] [2024-06-27 21:43:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771167613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:00,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949104123] [2024-06-27 21:43:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:00,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:00,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 669 transitions, 14119 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:00,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:00,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:03,503 INFO L124 PetriNetUnfolderBase]: 4128/6593 cut-off events. [2024-06-27 21:43:03,503 INFO L125 PetriNetUnfolderBase]: For 1626305/1626305 co-relation queries the response was YES. [2024-06-27 21:43:03,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92327 conditions, 6593 events. 4128/6593 cut-off events. For 1626305/1626305 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41408 event pairs, 758 based on Foata normal form. 6/6598 useless extension candidates. Maximal degree in co-relation 92120. Up to 6177 conditions per place. [2024-06-27 21:43:03,612 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 640 selfloop transitions, 74 changer transitions 0/719 dead transitions. [2024-06-27 21:43:03,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 719 transitions, 17453 flow [2024-06-27 21:43:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:43:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:43:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-27 21:43:03,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3658008658008658 [2024-06-27 21:43:03,613 INFO L175 Difference]: Start difference. First operand has 444 places, 669 transitions, 14119 flow. Second operand 11 states and 169 transitions. [2024-06-27 21:43:03,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 719 transitions, 17453 flow [2024-06-27 21:43:07,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 719 transitions, 17132 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-27 21:43:07,984 INFO L231 Difference]: Finished difference. Result has 448 places, 693 transitions, 15206 flow [2024-06-27 21:43:07,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13798, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15206, PETRI_PLACES=448, PETRI_TRANSITIONS=693} [2024-06-27 21:43:07,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-27 21:43:07,984 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 693 transitions, 15206 flow [2024-06-27 21:43:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:07,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:07,985 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] [2024-06-27 21:43:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:43:07,985 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:07,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash 350084151, now seen corresponding path program 1 times [2024-06-27 21:43:07,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944519451] [2024-06-27 21:43:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:10,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:10,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944519451] [2024-06-27 21:43:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944519451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:10,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655623779] [2024-06-27 21:43:10,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:10,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:10,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 693 transitions, 15206 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:13,916 INFO L124 PetriNetUnfolderBase]: 4132/6601 cut-off events. [2024-06-27 21:43:13,916 INFO L125 PetriNetUnfolderBase]: For 1631495/1631495 co-relation queries the response was YES. [2024-06-27 21:43:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92760 conditions, 6601 events. 4132/6601 cut-off events. For 1631495/1631495 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 41500 event pairs, 755 based on Foata normal form. 4/6604 useless extension candidates. Maximal degree in co-relation 92551. Up to 6283 conditions per place. [2024-06-27 21:43:14,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 674 selfloop transitions, 37 changer transitions 0/716 dead transitions. [2024-06-27 21:43:14,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 716 transitions, 17082 flow [2024-06-27 21:43:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:43:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:43:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 21:43:14,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 21:43:14,028 INFO L175 Difference]: Start difference. First operand has 448 places, 693 transitions, 15206 flow. Second operand 8 states and 123 transitions. [2024-06-27 21:43:14,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 716 transitions, 17082 flow [2024-06-27 21:43:18,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 716 transitions, 16466 flow, removed 290 selfloop flow, removed 6 redundant places. [2024-06-27 21:43:18,400 INFO L231 Difference]: Finished difference. Result has 451 places, 699 transitions, 14985 flow [2024-06-27 21:43:18,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14590, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14985, PETRI_PLACES=451, PETRI_TRANSITIONS=699} [2024-06-27 21:43:18,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-27 21:43:18,401 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 699 transitions, 14985 flow [2024-06-27 21:43:18,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:18,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:18,401 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] [2024-06-27 21:43:18,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:43:18,401 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:18,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 415806333, now seen corresponding path program 14 times [2024-06-27 21:43:18,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:18,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248992754] [2024-06-27 21:43:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:18,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:20,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248992754] [2024-06-27 21:43:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248992754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:20,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863679872] [2024-06-27 21:43:20,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:20,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:20,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:21,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:21,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 699 transitions, 14985 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:21,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:21,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:21,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:23,755 INFO L124 PetriNetUnfolderBase]: 4152/6617 cut-off events. [2024-06-27 21:43:23,755 INFO L125 PetriNetUnfolderBase]: For 1646481/1646481 co-relation queries the response was YES. [2024-06-27 21:43:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92720 conditions, 6617 events. 4152/6617 cut-off events. For 1646481/1646481 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41519 event pairs, 718 based on Foata normal form. 4/6611 useless extension candidates. Maximal degree in co-relation 92508. Up to 6137 conditions per place. [2024-06-27 21:43:23,879 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 634 selfloop transitions, 89 changer transitions 0/728 dead transitions. [2024-06-27 21:43:23,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 728 transitions, 17257 flow [2024-06-27 21:43:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:43:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:43:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:43:23,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 21:43:23,880 INFO L175 Difference]: Start difference. First operand has 451 places, 699 transitions, 14985 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:43:23,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 728 transitions, 17257 flow [2024-06-27 21:43:28,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 728 transitions, 17029 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:28,738 INFO L231 Difference]: Finished difference. Result has 453 places, 705 transitions, 15270 flow [2024-06-27 21:43:28,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14759, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15270, PETRI_PLACES=453, PETRI_TRANSITIONS=705} [2024-06-27 21:43:28,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-27 21:43:28,738 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 705 transitions, 15270 flow [2024-06-27 21:43:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:28,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:28,738 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] [2024-06-27 21:43:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:43:28,739 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:28,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 782408613, now seen corresponding path program 15 times [2024-06-27 21:43:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:28,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858031765] [2024-06-27 21:43:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:28,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858031765] [2024-06-27 21:43:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858031765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:31,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11801716] [2024-06-27 21:43:31,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:31,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 705 transitions, 15270 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:34,281 INFO L124 PetriNetUnfolderBase]: 4143/6615 cut-off events. [2024-06-27 21:43:34,281 INFO L125 PetriNetUnfolderBase]: For 1617375/1617375 co-relation queries the response was YES. [2024-06-27 21:43:34,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92192 conditions, 6615 events. 4143/6615 cut-off events. For 1617375/1617375 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41619 event pairs, 764 based on Foata normal form. 3/6617 useless extension candidates. Maximal degree in co-relation 91980. Up to 6308 conditions per place. [2024-06-27 21:43:34,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 686 selfloop transitions, 33 changer transitions 0/724 dead transitions. [2024-06-27 21:43:34,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 724 transitions, 16888 flow [2024-06-27 21:43:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:43:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:43:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 21:43:34,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2024-06-27 21:43:34,401 INFO L175 Difference]: Start difference. First operand has 453 places, 705 transitions, 15270 flow. Second operand 10 states and 146 transitions. [2024-06-27 21:43:34,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 724 transitions, 16888 flow [2024-06-27 21:43:40,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 724 transitions, 16479 flow, removed 121 selfloop flow, removed 7 redundant places. [2024-06-27 21:43:40,284 INFO L231 Difference]: Finished difference. Result has 457 places, 707 transitions, 15059 flow [2024-06-27 21:43:40,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14861, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15059, PETRI_PLACES=457, PETRI_TRANSITIONS=707} [2024-06-27 21:43:40,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-27 21:43:40,285 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 707 transitions, 15059 flow [2024-06-27 21:43:40,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:40,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:40,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:40,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:43:40,285 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:40,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:40,285 INFO L85 PathProgramCache]: Analyzing trace with hash 422472759, now seen corresponding path program 2 times [2024-06-27 21:43:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806002577] [2024-06-27 21:43:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:40,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806002577] [2024-06-27 21:43:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806002577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801481263] [2024-06-27 21:43:43,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:43,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:43,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:43,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 707 transitions, 15059 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:43,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:43,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:43,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:46,156 INFO L124 PetriNetUnfolderBase]: 4142/6604 cut-off events. [2024-06-27 21:43:46,156 INFO L125 PetriNetUnfolderBase]: For 1621309/1621309 co-relation queries the response was YES. [2024-06-27 21:43:46,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91548 conditions, 6604 events. 4142/6604 cut-off events. For 1621309/1621309 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 41503 event pairs, 728 based on Foata normal form. 3/6597 useless extension candidates. Maximal degree in co-relation 91334. Up to 6159 conditions per place. [2024-06-27 21:43:46,280 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 644 selfloop transitions, 79 changer transitions 0/728 dead transitions. [2024-06-27 21:43:46,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 728 transitions, 16847 flow [2024-06-27 21:43:46,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:43:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:43:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:43:46,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 21:43:46,281 INFO L175 Difference]: Start difference. First operand has 457 places, 707 transitions, 15059 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:43:46,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 728 transitions, 16847 flow [2024-06-27 21:43:51,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 728 transitions, 16299 flow, removed 251 selfloop flow, removed 6 redundant places. [2024-06-27 21:43:51,549 INFO L231 Difference]: Finished difference. Result has 459 places, 710 transitions, 14878 flow [2024-06-27 21:43:51,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14561, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14878, PETRI_PLACES=459, PETRI_TRANSITIONS=710} [2024-06-27 21:43:51,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-27 21:43:51,549 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 710 transitions, 14878 flow [2024-06-27 21:43:51,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:51,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:43:51,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:43:51,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:43:51,550 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:43:51,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:43:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1754717699, now seen corresponding path program 16 times [2024-06-27 21:43:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:43:51,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894001916] [2024-06-27 21:43:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:43:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:43:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:43:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:43:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:43:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894001916] [2024-06-27 21:43:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894001916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:43:54,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:43:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:43:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182421294] [2024-06-27 21:43:54,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:43:54,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:43:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:43:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:43:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:43:54,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:43:54,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 710 transitions, 14878 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:43:54,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:43:54,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:43:54,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:43:57,189 INFO L124 PetriNetUnfolderBase]: 4183/6673 cut-off events. [2024-06-27 21:43:57,190 INFO L125 PetriNetUnfolderBase]: For 1650842/1650842 co-relation queries the response was YES. [2024-06-27 21:43:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92478 conditions, 6673 events. 4183/6673 cut-off events. For 1650842/1650842 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42016 event pairs, 760 based on Foata normal form. 2/6674 useless extension candidates. Maximal degree in co-relation 92263. Up to 6286 conditions per place. [2024-06-27 21:43:57,312 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 673 selfloop transitions, 68 changer transitions 0/746 dead transitions. [2024-06-27 21:43:57,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 746 transitions, 17376 flow [2024-06-27 21:43:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:43:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:43:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-27 21:43:57,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-27 21:43:57,313 INFO L175 Difference]: Start difference. First operand has 459 places, 710 transitions, 14878 flow. Second operand 11 states and 171 transitions. [2024-06-27 21:43:57,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 746 transitions, 17376 flow [2024-06-27 21:44:02,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 746 transitions, 16814 flow, removed 217 selfloop flow, removed 5 redundant places. [2024-06-27 21:44:02,986 INFO L231 Difference]: Finished difference. Result has 468 places, 724 transitions, 14977 flow [2024-06-27 21:44:02,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14977, PETRI_PLACES=468, PETRI_TRANSITIONS=724} [2024-06-27 21:44:02,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-27 21:44:02,986 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 724 transitions, 14977 flow [2024-06-27 21:44:02,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:02,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:02,987 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] [2024-06-27 21:44:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:44:02,987 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:02,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 422235423, now seen corresponding path program 17 times [2024-06-27 21:44:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:02,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795128094] [2024-06-27 21:44:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:05,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:05,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795128094] [2024-06-27 21:44:05,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795128094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:05,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:05,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:05,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365408031] [2024-06-27 21:44:05,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:05,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:05,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:05,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 724 transitions, 14977 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:05,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:08,553 INFO L124 PetriNetUnfolderBase]: 4218/6716 cut-off events. [2024-06-27 21:44:08,553 INFO L125 PetriNetUnfolderBase]: For 1713699/1713699 co-relation queries the response was YES. [2024-06-27 21:44:08,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93584 conditions, 6716 events. 4218/6716 cut-off events. For 1713699/1713699 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 42209 event pairs, 731 based on Foata normal form. 6/6712 useless extension candidates. Maximal degree in co-relation 93365. Up to 6253 conditions per place. [2024-06-27 21:44:08,671 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 663 selfloop transitions, 90 changer transitions 0/758 dead transitions. [2024-06-27 21:44:08,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 758 transitions, 17394 flow [2024-06-27 21:44:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:44:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:44:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:44:08,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 21:44:08,672 INFO L175 Difference]: Start difference. First operand has 468 places, 724 transitions, 14977 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:44:08,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 758 transitions, 17394 flow [2024-06-27 21:44:13,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 758 transitions, 17151 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-27 21:44:13,703 INFO L231 Difference]: Finished difference. Result has 472 places, 741 transitions, 15795 flow [2024-06-27 21:44:13,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14734, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15795, PETRI_PLACES=472, PETRI_TRANSITIONS=741} [2024-06-27 21:44:13,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-27 21:44:13,704 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 741 transitions, 15795 flow [2024-06-27 21:44:13,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:13,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:13,704 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] [2024-06-27 21:44:13,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:44:13,704 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:13,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1759305513, now seen corresponding path program 16 times [2024-06-27 21:44:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896647606] [2024-06-27 21:44:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:13,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:16,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:16,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896647606] [2024-06-27 21:44:16,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896647606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:16,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:16,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:16,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016139994] [2024-06-27 21:44:16,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:16,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:16,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:16,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:16,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:16,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 741 transitions, 15795 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:16,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:16,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:16,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:19,170 INFO L124 PetriNetUnfolderBase]: 4287/6819 cut-off events. [2024-06-27 21:44:19,170 INFO L125 PetriNetUnfolderBase]: For 1783644/1783644 co-relation queries the response was YES. [2024-06-27 21:44:19,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96807 conditions, 6819 events. 4287/6819 cut-off events. For 1783644/1783644 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 42846 event pairs, 681 based on Foata normal form. 2/6811 useless extension candidates. Maximal degree in co-relation 96586. Up to 5862 conditions per place. [2024-06-27 21:44:19,299 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 560 selfloop transitions, 210 changer transitions 0/775 dead transitions. [2024-06-27 21:44:19,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 775 transitions, 18216 flow [2024-06-27 21:44:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:44:19,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:44:19,301 INFO L175 Difference]: Start difference. First operand has 472 places, 741 transitions, 15795 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:44:19,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 775 transitions, 18216 flow [2024-06-27 21:44:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 775 transitions, 17399 flow, removed 337 selfloop flow, removed 6 redundant places. [2024-06-27 21:44:24,693 INFO L231 Difference]: Finished difference. Result has 478 places, 745 transitions, 15701 flow [2024-06-27 21:44:24,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14978, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15701, PETRI_PLACES=478, PETRI_TRANSITIONS=745} [2024-06-27 21:44:24,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 21:44:24,694 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 745 transitions, 15701 flow [2024-06-27 21:44:24,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:24,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:24,694 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] [2024-06-27 21:44:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:44:24,694 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:24,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1767876393, now seen corresponding path program 17 times [2024-06-27 21:44:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:24,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418042994] [2024-06-27 21:44:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:24,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:27,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418042994] [2024-06-27 21:44:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418042994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:27,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:27,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:27,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523400755] [2024-06-27 21:44:27,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:27,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:27,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:27,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:27,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 745 transitions, 15701 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:27,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:27,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:27,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:30,286 INFO L124 PetriNetUnfolderBase]: 4282/6806 cut-off events. [2024-06-27 21:44:30,287 INFO L125 PetriNetUnfolderBase]: For 1776422/1776422 co-relation queries the response was YES. [2024-06-27 21:44:30,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96848 conditions, 6806 events. 4282/6806 cut-off events. For 1776422/1776422 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 42770 event pairs, 743 based on Foata normal form. 2/6798 useless extension candidates. Maximal degree in co-relation 96624. Up to 6378 conditions per place. [2024-06-27 21:44:30,416 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 670 selfloop transitions, 89 changer transitions 0/764 dead transitions. [2024-06-27 21:44:30,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 764 transitions, 17535 flow [2024-06-27 21:44:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 21:44:30,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 21:44:30,418 INFO L175 Difference]: Start difference. First operand has 478 places, 745 transitions, 15701 flow. Second operand 10 states and 154 transitions. [2024-06-27 21:44:30,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 764 transitions, 17535 flow [2024-06-27 21:44:36,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 764 transitions, 17314 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-27 21:44:36,702 INFO L231 Difference]: Finished difference. Result has 484 places, 745 transitions, 15663 flow [2024-06-27 21:44:36,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15480, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15663, PETRI_PLACES=484, PETRI_TRANSITIONS=745} [2024-06-27 21:44:36,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-27 21:44:36,703 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 745 transitions, 15663 flow [2024-06-27 21:44:36,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:36,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:36,703 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] [2024-06-27 21:44:36,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:44:36,703 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:36,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1167865717, now seen corresponding path program 18 times [2024-06-27 21:44:36,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:36,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192638314] [2024-06-27 21:44:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:39,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:39,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192638314] [2024-06-27 21:44:39,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192638314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:39,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:39,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:39,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281994836] [2024-06-27 21:44:39,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:39,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:39,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:39,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:39,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 745 transitions, 15663 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:39,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:39,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:39,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:42,629 INFO L124 PetriNetUnfolderBase]: 4384/6964 cut-off events. [2024-06-27 21:44:42,629 INFO L125 PetriNetUnfolderBase]: For 1875511/1875511 co-relation queries the response was YES. [2024-06-27 21:44:42,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100323 conditions, 6964 events. 4384/6964 cut-off events. For 1875511/1875511 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 43895 event pairs, 737 based on Foata normal form. 2/6956 useless extension candidates. Maximal degree in co-relation 100097. Up to 6092 conditions per place. [2024-06-27 21:44:42,754 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 548 selfloop transitions, 248 changer transitions 0/801 dead transitions. [2024-06-27 21:44:42,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 801 transitions, 19079 flow [2024-06-27 21:44:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 21:44:42,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 21:44:42,756 INFO L175 Difference]: Start difference. First operand has 484 places, 745 transitions, 15663 flow. Second operand 10 states and 167 transitions. [2024-06-27 21:44:42,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 801 transitions, 19079 flow [2024-06-27 21:44:49,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 801 transitions, 18907 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:44:49,541 INFO L231 Difference]: Finished difference. Result has 488 places, 778 transitions, 17132 flow [2024-06-27 21:44:49,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15491, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17132, PETRI_PLACES=488, PETRI_TRANSITIONS=778} [2024-06-27 21:44:49,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-27 21:44:49,541 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 778 transitions, 17132 flow [2024-06-27 21:44:49,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:49,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:44:49,542 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] [2024-06-27 21:44:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:44:49,542 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:44:49,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:44:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1995777419, now seen corresponding path program 19 times [2024-06-27 21:44:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:44:49,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536596698] [2024-06-27 21:44:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:44:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:44:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:44:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:44:52,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:44:52,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536596698] [2024-06-27 21:44:52,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536596698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:44:52,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:44:52,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:44:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837367619] [2024-06-27 21:44:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:44:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:44:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:44:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:44:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:44:52,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:44:52,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 778 transitions, 17132 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:44:52,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:44:52,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:44:52,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:44:56,222 INFO L124 PetriNetUnfolderBase]: 4416/7017 cut-off events. [2024-06-27 21:44:56,222 INFO L125 PetriNetUnfolderBase]: For 1950725/1950725 co-relation queries the response was YES. [2024-06-27 21:44:56,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103160 conditions, 7017 events. 4416/7017 cut-off events. For 1950725/1950725 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44218 event pairs, 738 based on Foata normal form. 4/7011 useless extension candidates. Maximal degree in co-relation 102932. Up to 6347 conditions per place. [2024-06-27 21:44:56,351 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 617 selfloop transitions, 188 changer transitions 0/810 dead transitions. [2024-06-27 21:44:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 810 transitions, 19966 flow [2024-06-27 21:44:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:44:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:44:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:44:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 21:44:56,352 INFO L175 Difference]: Start difference. First operand has 488 places, 778 transitions, 17132 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:44:56,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 810 transitions, 19966 flow [2024-06-27 21:45:02,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 810 transitions, 19418 flow, removed 138 selfloop flow, removed 6 redundant places. [2024-06-27 21:45:03,008 INFO L231 Difference]: Finished difference. Result has 493 places, 787 transitions, 17607 flow [2024-06-27 21:45:03,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16596, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17607, PETRI_PLACES=493, PETRI_TRANSITIONS=787} [2024-06-27 21:45:03,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-27 21:45:03,009 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 787 transitions, 17607 flow [2024-06-27 21:45:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:03,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:03,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:45:03,010 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:03,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1767871619, now seen corresponding path program 20 times [2024-06-27 21:45:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:03,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639313372] [2024-06-27 21:45:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639313372] [2024-06-27 21:45:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639313372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:05,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575252793] [2024-06-27 21:45:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:05,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:05,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 787 transitions, 17607 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:05,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:09,093 INFO L124 PetriNetUnfolderBase]: 4410/7011 cut-off events. [2024-06-27 21:45:09,093 INFO L125 PetriNetUnfolderBase]: For 1946924/1946924 co-relation queries the response was YES. [2024-06-27 21:45:09,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103495 conditions, 7011 events. 4410/7011 cut-off events. For 1946924/1946924 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44270 event pairs, 742 based on Foata normal form. 2/7003 useless extension candidates. Maximal degree in co-relation 103264. Up to 6421 conditions per place. [2024-06-27 21:45:09,221 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 623 selfloop transitions, 177 changer transitions 0/805 dead transitions. [2024-06-27 21:45:09,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 805 transitions, 19564 flow [2024-06-27 21:45:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:45:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:45:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:45:09,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-27 21:45:09,223 INFO L175 Difference]: Start difference. First operand has 493 places, 787 transitions, 17607 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:45:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 805 transitions, 19564 flow [2024-06-27 21:45:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 805 transitions, 19035 flow, removed 160 selfloop flow, removed 7 redundant places. [2024-06-27 21:45:16,226 INFO L231 Difference]: Finished difference. Result has 495 places, 788 transitions, 17461 flow [2024-06-27 21:45:16,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17079, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17461, PETRI_PLACES=495, PETRI_TRANSITIONS=788} [2024-06-27 21:45:16,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-27 21:45:16,227 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 788 transitions, 17461 flow [2024-06-27 21:45:16,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:16,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:16,227 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] [2024-06-27 21:45:16,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:45:16,228 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:16,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1754984609, now seen corresponding path program 21 times [2024-06-27 21:45:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:16,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103773979] [2024-06-27 21:45:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:16,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103773979] [2024-06-27 21:45:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103773979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295658607] [2024-06-27 21:45:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:19,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:19,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 788 transitions, 17461 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:19,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:19,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:19,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:23,124 INFO L124 PetriNetUnfolderBase]: 4417/7030 cut-off events. [2024-06-27 21:45:23,124 INFO L125 PetriNetUnfolderBase]: For 1963456/1963456 co-relation queries the response was YES. [2024-06-27 21:45:23,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103212 conditions, 7030 events. 4417/7030 cut-off events. For 1963456/1963456 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 44412 event pairs, 707 based on Foata normal form. 2/7031 useless extension candidates. Maximal degree in co-relation 102980. Up to 6261 conditions per place. [2024-06-27 21:45:23,270 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 639 selfloop transitions, 169 changer transitions 0/813 dead transitions. [2024-06-27 21:45:23,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 813 transitions, 19487 flow [2024-06-27 21:45:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:45:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:45:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 21:45:23,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 21:45:23,271 INFO L175 Difference]: Start difference. First operand has 495 places, 788 transitions, 17461 flow. Second operand 10 states and 162 transitions. [2024-06-27 21:45:23,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 813 transitions, 19487 flow [2024-06-27 21:45:30,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 813 transitions, 19018 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-06-27 21:45:30,934 INFO L231 Difference]: Finished difference. Result has 501 places, 790 transitions, 17554 flow [2024-06-27 21:45:30,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16992, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17554, PETRI_PLACES=501, PETRI_TRANSITIONS=790} [2024-06-27 21:45:30,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 21:45:30,934 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 790 transitions, 17554 flow [2024-06-27 21:45:30,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:30,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:45:30,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:45:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:45:30,935 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:45:30,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:45:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1759602059, now seen corresponding path program 22 times [2024-06-27 21:45:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:45:30,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343076832] [2024-06-27 21:45:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:45:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:45:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:45:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:45:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:45:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343076832] [2024-06-27 21:45:33,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343076832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:45:33,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:45:33,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:45:33,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625099844] [2024-06-27 21:45:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:45:33,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:45:33,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:45:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:45:33,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:45:33,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 21:45:33,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 790 transitions, 17554 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:45:33,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:45:33,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 21:45:33,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:45:37,551 INFO L124 PetriNetUnfolderBase]: 4453/7070 cut-off events. [2024-06-27 21:45:37,551 INFO L125 PetriNetUnfolderBase]: For 2038400/2038400 co-relation queries the response was YES. [2024-06-27 21:45:37,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105260 conditions, 7070 events. 4453/7070 cut-off events. For 2038400/2038400 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 44576 event pairs, 733 based on Foata normal form. 4/7064 useless extension candidates. Maximal degree in co-relation 105026. Up to 6020 conditions per place. [2024-06-27 21:45:37,700 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 454 selfloop transitions, 366 changer transitions 0/825 dead transitions. [2024-06-27 21:45:37,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 825 transitions, 20736 flow [2024-06-27 21:45:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:45:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:45:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:45:37,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-27 21:45:37,702 INFO L175 Difference]: Start difference. First operand has 501 places, 790 transitions, 17554 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:45:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 825 transitions, 20736 flow Killed by 15