./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe020_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe020_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe020_rmo.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-76401ed-m [2024-06-20 17:17:38,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:17:38,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:17:38,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:17:38,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:17:38,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:17:38,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:17:38,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:17:38,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:17:38,364 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:17:38,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:17:38,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:17:38,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:17:38,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:17:38,366 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:17:38,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:17:38,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:17:38,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:17:38,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:17:38,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:17:38,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:17:38,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:17:38,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:17:38,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:17:38,373 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:17:38,374 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:17:38,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:17:38,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:17:38,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:17:38,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:17:38,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:17:38,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:17:38,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:17:38,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:17:38,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:17:38,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:17:38,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:17:38,596 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:17:38,597 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:17:38,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe020_rmo.yml/witness.yml [2024-06-20 17:17:38,820 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:17:38,821 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:17:38,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-20 17:17:39,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:17:39,970 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:17:39,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_rmo.i [2024-06-20 17:17:40,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed84c5fbc/6d2c83cd42ba4cfd8e2e52cc6aff765a/FLAG0af679979 [2024-06-20 17:17:40,021 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed84c5fbc/6d2c83cd42ba4cfd8e2e52cc6aff765a [2024-06-20 17:17:40,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:17:40,022 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:17:40,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:17:40,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:17:40,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:17:40,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:38" (1/2) ... [2024-06-20 17:17:40,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3211d8e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:40, skipping insertion in model container [2024-06-20 17:17:40,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:38" (1/2) ... [2024-06-20 17:17:40,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34955549 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:17:40, skipping insertion in model container [2024-06-20 17:17:40,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:17:40" (2/2) ... [2024-06-20 17:17:40,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3211d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40, skipping insertion in model container [2024-06-20 17:17:40,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:17:40" (2/2) ... [2024-06-20 17:17:40,030 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:17:40,133 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:17:40,134 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:40,134 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:40,134 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-20 17:17:40,134 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:17:40,134 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-20 17:17:40,192 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:17:40,523 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:17:40,538 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:17:40,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:17:40,702 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:17:40,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40 WrapperNode [2024-06-20 17:17:40,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:17:40,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:17:40,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:17:40,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:17:40,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,765 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 207 [2024-06-20 17:17:40,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:17:40,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:17:40,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:17:40,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:17:40,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,795 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-20 17:17:40,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,807 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:17:40,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:17:40,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:17:40,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:17:40,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (1/1) ... [2024-06-20 17:17:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:17:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:17:40,847 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) [2024-06-20 17:17:40,855 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 [2024-06-20 17:17:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:17:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:17:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:17:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:17:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:17:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:17:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:17:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:17:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:17:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:17:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:17:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:17:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:17:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:17:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:17:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:17:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:17:40,886 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:17:41,025 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:17:41,026 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:17:41,549 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:17:41,549 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:17:41,879 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:17:41,879 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:17:41,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:17:41 BoogieIcfgContainer [2024-06-20 17:17:41,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:17:41,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:17:41,882 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:17:41,885 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:17:41,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:17:38" (1/4) ... [2024-06-20 17:17:41,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e363ffd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:17:41, skipping insertion in model container [2024-06-20 17:17:41,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:17:40" (2/4) ... [2024-06-20 17:17:41,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e363ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:17:41, skipping insertion in model container [2024-06-20 17:17:41,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:17:40" (3/4) ... [2024-06-20 17:17:41,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e363ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:17:41, skipping insertion in model container [2024-06-20 17:17:41,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:17:41" (4/4) ... [2024-06-20 17:17:41,890 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_rmo.i [2024-06-20 17:17:41,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:17:41,905 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:17:41,905 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:17:41,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:17:41,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:17:42,016 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 17:17:42,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:17:42,018 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 59 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. [2024-06-20 17:17:42,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 17:17:42,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 17:17:42,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:17:42,043 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;@e0045b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:17:42,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:17:42,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:17:42,047 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 17:17:42,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:17:42,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:42,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:17:42,048 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)] === [2024-06-20 17:17:42,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash 756758017, now seen corresponding path program 1 times [2024-06-20 17:17:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:42,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488940727] [2024-06-20 17:17:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:43,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488940727] [2024-06-20 17:17:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488940727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:43,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:17:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819782519] [2024-06-20 17:17:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:43,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:17:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:43,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:17:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:17:43,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:43,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:43,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:43,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:43,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:44,286 INFO L124 PetriNetUnfolderBase]: 1160/1782 cut-off events. [2024-06-20 17:17:44,286 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 17:17:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1782 events. 1160/1782 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8343 event pairs, 777 based on Foata normal form. 1/1753 useless extension candidates. Maximal degree in co-relation 3595. Up to 1748 conditions per place. [2024-06-20 17:17:44,297 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-20 17:17:44,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 183 flow [2024-06-20 17:17:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:17:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:17:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-20 17:17:44,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 17:17:44,307 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 69 transitions. [2024-06-20 17:17:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 183 flow [2024-06-20 17:17:44,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:44,311 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 17:17:44,312 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} [2024-06-20 17:17:44,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 17:17:44,315 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 17:17:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:44,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:44,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:44,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:17:44,316 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)] === [2024-06-20 17:17:44,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1395031872, now seen corresponding path program 1 times [2024-06-20 17:17:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748363723] [2024-06-20 17:17:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748363723] [2024-06-20 17:17:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748363723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:45,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:17:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514314696] [2024-06-20 17:17:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:45,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:17:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:17:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:17:45,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:45,717 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) [2024-06-20 17:17:45,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:45,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:45,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:46,148 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-20 17:17:46,148 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-20 17:17:46,151 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 8301 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. [2024-06-20 17:17:46,158 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-20 17:17:46,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-20 17:17:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:17:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:17:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-20 17:17:46,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 17:17:46,162 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-20 17:17:46,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-20 17:17:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:17:46,165 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 17:17:46,165 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} [2024-06-20 17:17:46,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 17:17:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 17:17:46,168 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) [2024-06-20 17:17:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:46,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:46,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:17:46,172 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)] === [2024-06-20 17:17:46,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1415065022, now seen corresponding path program 1 times [2024-06-20 17:17:46,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464778433] [2024-06-20 17:17:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:48,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464778433] [2024-06-20 17:17:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464778433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:48,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:48,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:17:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455915094] [2024-06-20 17:17:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:48,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:17:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:17:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:17:48,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 17:17:48,396 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) [2024-06-20 17:17:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 17:17:48,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:49,103 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-20 17:17:49,103 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-20 17:17:49,106 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 8190 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. [2024-06-20 17:17:49,113 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 17:17:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-20 17:17:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-20 17:17:49,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-20 17:17:49,118 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-20 17:17:49,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-20 17:17:49,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:49,121 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 17:17:49,121 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} [2024-06-20 17:17:49,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 17:17:49,122 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 17:17:49,122 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) [2024-06-20 17:17:49,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:49,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:49,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:17:49,123 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)] === [2024-06-20 17:17:49,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1255441540, now seen corresponding path program 1 times [2024-06-20 17:17:49,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:49,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71957778] [2024-06-20 17:17:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:49,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:50,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71957778] [2024-06-20 17:17:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71957778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:50,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:50,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:17:50,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320908232] [2024-06-20 17:17:50,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:50,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:17:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:17:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:17:50,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:50,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:50,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:50,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:50,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:51,410 INFO L124 PetriNetUnfolderBase]: 1129/1735 cut-off events. [2024-06-20 17:17:51,410 INFO L125 PetriNetUnfolderBase]: For 1864/1864 co-relation queries the response was YES. [2024-06-20 17:17:51,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4907 conditions, 1735 events. 1129/1735 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8081 event pairs, 446 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 4890. Up to 1679 conditions per place. [2024-06-20 17:17:51,418 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-20 17:17:51,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 343 flow [2024-06-20 17:17:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:17:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:17:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:17:51,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:17:51,419 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:17:51,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 343 flow [2024-06-20 17:17:51,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 316 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:51,424 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 17:17:51,424 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} [2024-06-20 17:17:51,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 17:17:51,426 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 17:17:51,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:17:51,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:51,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:51,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:17:51,426 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)] === [2024-06-20 17:17:51,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1178942951, now seen corresponding path program 1 times [2024-06-20 17:17:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:51,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084029542] [2024-06-20 17:17:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:51,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084029542] [2024-06-20 17:17:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084029542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:53,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:53,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338263822] [2024-06-20 17:17:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:53,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:53,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:53,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:53,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 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) [2024-06-20 17:17:53,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:53,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:53,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:54,149 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-20 17:17:54,150 INFO L125 PetriNetUnfolderBase]: For 2718/2720 co-relation queries the response was YES. [2024-06-20 17:17:54,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2718/2720 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8395 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-20 17:17:54,162 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-20 17:17:54,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-20 17:17:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 17:17:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 17:17:54,167 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-20 17:17:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-20 17:17:54,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:17:54,173 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-20 17:17:54,173 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-20 17:17:54,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-20 17:17:54,176 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-20 17:17:54,176 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) [2024-06-20 17:17:54,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:54,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:17:54,176 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)] === [2024-06-20 17:17:54,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash 415466575, now seen corresponding path program 2 times [2024-06-20 17:17:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:54,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827230403] [2024-06-20 17:17:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:55,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:55,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827230403] [2024-06-20 17:17:55,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827230403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:55,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:55,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:17:55,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418462208] [2024-06-20 17:17:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:55,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:17:55,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:17:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:17:55,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:55,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 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) [2024-06-20 17:17:55,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:55,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:56,734 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-20 17:17:56,734 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-20 17:17:56,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8247 event pairs, 419 based on Foata normal form. 4/1766 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-20 17:17:56,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-20 17:17:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-20 17:17:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:17:56,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 17:17:56,746 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:17:56,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-20 17:17:56,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:17:56,752 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-20 17:17:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-20 17:17:56,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 17:17:56,755 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-20 17:17:56,755 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) [2024-06-20 17:17:56,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:56,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:56,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:17:56,756 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)] === [2024-06-20 17:17:56,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 157187533, now seen corresponding path program 1 times [2024-06-20 17:17:56,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176252570] [2024-06-20 17:17:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:17:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:17:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:17:59,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176252570] [2024-06-20 17:17:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176252570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:17:59,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:17:59,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:17:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959775000] [2024-06-20 17:17:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:17:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:17:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:17:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:17:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:17:59,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:17:59,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 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) [2024-06-20 17:17:59,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:17:59,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:17:59,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:17:59,919 INFO L124 PetriNetUnfolderBase]: 1137/1759 cut-off events. [2024-06-20 17:17:59,919 INFO L125 PetriNetUnfolderBase]: For 4532/4532 co-relation queries the response was YES. [2024-06-20 17:17:59,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1759 events. 1137/1759 cut-off events. For 4532/4532 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8196 event pairs, 406 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 5868. Up to 1669 conditions per place. [2024-06-20 17:17:59,931 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-20 17:17:59,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 478 flow [2024-06-20 17:17:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:17:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:17:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:17:59,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:17:59,933 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:17:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 478 flow [2024-06-20 17:17:59,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 434 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:17:59,937 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-20 17:17:59,937 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-20 17:17:59,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 17:17:59,938 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-20 17:17:59,938 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) [2024-06-20 17:17:59,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:17:59,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:17:59,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:17:59,938 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)] === [2024-06-20 17:17:59,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:17:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1391225876, now seen corresponding path program 1 times [2024-06-20 17:17:59,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:17:59,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519574796] [2024-06-20 17:17:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:17:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:17:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:02,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519574796] [2024-06-20 17:18:02,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519574796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:02,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877744822] [2024-06-20 17:18:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:02,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:02,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:02,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 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) [2024-06-20 17:18:02,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:02,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:02,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:03,072 INFO L124 PetriNetUnfolderBase]: 1163/1803 cut-off events. [2024-06-20 17:18:03,072 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-20 17:18:03,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1803 events. 1163/1803 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8546 event pairs, 436 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-20 17:18:03,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-20 17:18:03,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-20 17:18:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:18:03,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:18:03,093 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:18:03,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-20 17:18:03,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:18:03,098 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-20 17:18:03,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-20 17:18:03,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 17:18:03,100 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-20 17:18:03,100 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) [2024-06-20 17:18:03,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:03,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:18:03,101 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)] === [2024-06-20 17:18:03,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 902589626, now seen corresponding path program 2 times [2024-06-20 17:18:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:03,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997821407] [2024-06-20 17:18:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997821407] [2024-06-20 17:18:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997821407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579034624] [2024-06-20 17:18:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:05,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:05,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 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) [2024-06-20 17:18:05,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:05,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:05,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:06,384 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-20 17:18:06,395 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-20 17:18:06,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8910 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-20 17:18:06,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-20 17:18:06,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-20 17:18:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 17:18:06,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 17:18:06,406 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-20 17:18:06,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-20 17:18:06,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:06,411 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-20 17:18:06,411 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=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-20 17:18:06,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 17:18:06,414 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-20 17:18:06,414 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) [2024-06-20 17:18:06,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:06,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:06,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:18:06,418 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)] === [2024-06-20 17:18:06,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1386457332, now seen corresponding path program 1 times [2024-06-20 17:18:06,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:06,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835280870] [2024-06-20 17:18:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:08,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:08,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835280870] [2024-06-20 17:18:08,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835280870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:08,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:08,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889513479] [2024-06-20 17:18:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:08,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:08,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:08,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 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) [2024-06-20 17:18:08,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:08,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:10,117 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-20 17:18:10,117 INFO L125 PetriNetUnfolderBase]: For 9939/9943 co-relation queries the response was YES. [2024-06-20 17:18:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9939/9943 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9077 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-20 17:18:10,126 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-20 17:18:10,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-20 17:18:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:18:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 17:18:10,128 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:18:10,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-20 17:18:10,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:10,135 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-20 17:18:10,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-20 17:18:10,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 17:18:10,136 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-20 17:18:10,136 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) [2024-06-20 17:18:10,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:10,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:18:10,137 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)] === [2024-06-20 17:18:10,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash -113127670, now seen corresponding path program 3 times [2024-06-20 17:18:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:10,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341336291] [2024-06-20 17:18:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:12,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:12,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341336291] [2024-06-20 17:18:12,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341336291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:12,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:12,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:18:12,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150414242] [2024-06-20 17:18:12,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:18:12,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:18:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:18:12,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:12,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 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) [2024-06-20 17:18:12,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:12,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:12,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:13,322 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-20 17:18:13,323 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-20 17:18:13,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8957 event pairs, 392 based on Foata normal form. 4/1864 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-20 17:18:13,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-20 17:18:13,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-20 17:18:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:18:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:18:13,333 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:18:13,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-20 17:18:13,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:13,340 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-20 17:18:13,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-20 17:18:13,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-20 17:18:13,340 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-20 17:18:13,340 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) [2024-06-20 17:18:13,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:13,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:13,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:18:13,341 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)] === [2024-06-20 17:18:13,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash -159068484, now seen corresponding path program 2 times [2024-06-20 17:18:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:13,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060328929] [2024-06-20 17:18:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:15,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:15,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060328929] [2024-06-20 17:18:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060328929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:15,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:15,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846305456] [2024-06-20 17:18:15,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:15,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:15,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:15,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:15,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 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) [2024-06-20 17:18:15,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:15,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:15,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:16,978 INFO L124 PetriNetUnfolderBase]: 1219/1908 cut-off events. [2024-06-20 17:18:16,978 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-20 17:18:16,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 1908 events. 1219/1908 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9169 event pairs, 398 based on Foata normal form. 4/1910 useless extension candidates. Maximal degree in co-relation 7814. Up to 1726 conditions per place. [2024-06-20 17:18:16,986 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-20 17:18:16,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 684 flow [2024-06-20 17:18:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:18:16,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:18:16,988 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:18:16,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 684 flow [2024-06-20 17:18:16,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 616 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:16,996 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 421 flow [2024-06-20 17:18:16,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-20 17:18:16,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-20 17:18:16,997 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 421 flow [2024-06-20 17:18:16,997 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) [2024-06-20 17:18:16,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:16,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:18:16,997 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)] === [2024-06-20 17:18:16,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash -158771814, now seen corresponding path program 3 times [2024-06-20 17:18:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273351545] [2024-06-20 17:18:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:19,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273351545] [2024-06-20 17:18:19,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273351545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:19,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:19,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:19,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400685139] [2024-06-20 17:18:19,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:19,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:19,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:19,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 421 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) [2024-06-20 17:18:19,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:19,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:19,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:20,337 INFO L124 PetriNetUnfolderBase]: 1211/1896 cut-off events. [2024-06-20 17:18:20,337 INFO L125 PetriNetUnfolderBase]: For 14763/14763 co-relation queries the response was YES. [2024-06-20 17:18:20,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1896 events. 1211/1896 cut-off events. For 14763/14763 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9118 event pairs, 366 based on Foata normal form. 4/1898 useless extension candidates. Maximal degree in co-relation 7920. Up to 1642 conditions per place. [2024-06-20 17:18:20,348 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-20 17:18:20,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 697 flow [2024-06-20 17:18:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:18:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:18:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:18:20,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:18:20,350 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 421 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:18:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 697 flow [2024-06-20 17:18:20,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 642 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:20,359 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 453 flow [2024-06-20 17:18:20,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-20 17:18:20,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:18:20,360 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 453 flow [2024-06-20 17:18:20,360 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) [2024-06-20 17:18:20,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:20,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:18:20,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1971009202, now seen corresponding path program 1 times [2024-06-20 17:18:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410176407] [2024-06-20 17:18:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:22,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:22,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410176407] [2024-06-20 17:18:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410176407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:22,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:22,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:18:22,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896733387] [2024-06-20 17:18:22,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:22,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:18:22,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:22,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:18:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:18:22,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:22,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 453 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:22,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:22,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:22,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:22,868 INFO L124 PetriNetUnfolderBase]: 1208/1887 cut-off events. [2024-06-20 17:18:22,869 INFO L125 PetriNetUnfolderBase]: For 16435/16435 co-relation queries the response was YES. [2024-06-20 17:18:22,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8165 conditions, 1887 events. 1208/1887 cut-off events. For 16435/16435 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9057 event pairs, 434 based on Foata normal form. 1/1887 useless extension candidates. Maximal degree in co-relation 8136. Up to 1820 conditions per place. [2024-06-20 17:18:22,877 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 69 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-06-20 17:18:22,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 649 flow [2024-06-20 17:18:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:18:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:18:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-20 17:18:22,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:18:22,878 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 453 flow. Second operand 5 states and 84 transitions. [2024-06-20 17:18:22,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 649 flow [2024-06-20 17:18:22,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 580 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:22,887 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 430 flow [2024-06-20 17:18:22,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-20 17:18:22,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-20 17:18:22,888 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 430 flow [2024-06-20 17:18:22,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:22,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:22,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:22,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:18:22,889 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:22,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -971741165, now seen corresponding path program 1 times [2024-06-20 17:18:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:22,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063133152] [2024-06-20 17:18:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063133152] [2024-06-20 17:18:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063133152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:25,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:25,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992718114] [2024-06-20 17:18:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:25,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:25,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 430 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) [2024-06-20 17:18:25,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:25,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:25,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:26,009 INFO L124 PetriNetUnfolderBase]: 1230/1913 cut-off events. [2024-06-20 17:18:26,009 INFO L125 PetriNetUnfolderBase]: For 18037/18037 co-relation queries the response was YES. [2024-06-20 17:18:26,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8442 conditions, 1913 events. 1230/1913 cut-off events. For 18037/18037 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9192 event pairs, 444 based on Foata normal form. 6/1916 useless extension candidates. Maximal degree in co-relation 8412. Up to 1749 conditions per place. [2024-06-20 17:18:26,017 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-20 17:18:26,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 746 flow [2024-06-20 17:18:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 17:18:26,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:18:26,019 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 430 flow. Second operand 6 states and 106 transitions. [2024-06-20 17:18:26,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 746 flow [2024-06-20 17:18:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 722 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:26,027 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 526 flow [2024-06-20 17:18:26,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-20 17:18:26,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-20 17:18:26,028 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 526 flow [2024-06-20 17:18:26,028 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) [2024-06-20 17:18:26,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:26,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:18:26,028 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)] === [2024-06-20 17:18:26,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1367640623, now seen corresponding path program 1 times [2024-06-20 17:18:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953853937] [2024-06-20 17:18:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953853937] [2024-06-20 17:18:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953853937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459363678] [2024-06-20 17:18:27,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:27,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:27,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 526 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) [2024-06-20 17:18:27,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:27,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:29,006 INFO L124 PetriNetUnfolderBase]: 1485/2346 cut-off events. [2024-06-20 17:18:29,006 INFO L125 PetriNetUnfolderBase]: For 25896/25896 co-relation queries the response was YES. [2024-06-20 17:18:29,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11040 conditions, 2346 events. 1485/2346 cut-off events. For 25896/25896 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12027 event pairs, 473 based on Foata normal form. 16/2361 useless extension candidates. Maximal degree in co-relation 11008. Up to 1851 conditions per place. [2024-06-20 17:18:29,017 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 27 changer transitions 0/159 dead transitions. [2024-06-20 17:18:29,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 159 transitions, 1174 flow [2024-06-20 17:18:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:18:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:18:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-20 17:18:29,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-20 17:18:29,019 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 526 flow. Second operand 11 states and 207 transitions. [2024-06-20 17:18:29,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 159 transitions, 1174 flow [2024-06-20 17:18:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 159 transitions, 1137 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-20 17:18:29,031 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 680 flow [2024-06-20 17:18:29,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=680, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-20 17:18:29,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 17:18:29,032 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 680 flow [2024-06-20 17:18:29,032 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) [2024-06-20 17:18:29,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:29,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:18:29,032 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)] === [2024-06-20 17:18:29,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash -312868329, now seen corresponding path program 2 times [2024-06-20 17:18:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:29,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302199856] [2024-06-20 17:18:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302199856] [2024-06-20 17:18:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302199856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:31,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:31,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:31,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545054888] [2024-06-20 17:18:31,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:31,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:31,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:31,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:31,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:31,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:31,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 680 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) [2024-06-20 17:18:31,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:31,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:32,724 INFO L124 PetriNetUnfolderBase]: 1677/2666 cut-off events. [2024-06-20 17:18:32,724 INFO L125 PetriNetUnfolderBase]: For 34703/34703 co-relation queries the response was YES. [2024-06-20 17:18:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13286 conditions, 2666 events. 1677/2666 cut-off events. For 34703/34703 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14154 event pairs, 412 based on Foata normal form. 16/2681 useless extension candidates. Maximal degree in co-relation 13249. Up to 1829 conditions per place. [2024-06-20 17:18:32,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-20 17:18:32,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 148 transitions, 1254 flow [2024-06-20 17:18:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:18:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:18:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:18:32,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-20 17:18:32,742 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 680 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:18:32,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 148 transitions, 1254 flow [2024-06-20 17:18:32,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 148 transitions, 1215 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:18:32,759 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 759 flow [2024-06-20 17:18:32,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=759, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2024-06-20 17:18:32,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-20 17:18:32,760 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 759 flow [2024-06-20 17:18:32,760 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) [2024-06-20 17:18:32,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:32,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:32,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:18:32,761 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:32,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -199783495, now seen corresponding path program 3 times [2024-06-20 17:18:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:32,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391558279] [2024-06-20 17:18:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:35,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391558279] [2024-06-20 17:18:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391558279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:35,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:35,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985381546] [2024-06-20 17:18:35,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:35,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:35,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 759 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) [2024-06-20 17:18:35,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:35,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:35,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:36,307 INFO L124 PetriNetUnfolderBase]: 1605/2556 cut-off events. [2024-06-20 17:18:36,307 INFO L125 PetriNetUnfolderBase]: For 35213/35213 co-relation queries the response was YES. [2024-06-20 17:18:36,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12430 conditions, 2556 events. 1605/2556 cut-off events. For 35213/35213 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13473 event pairs, 547 based on Foata normal form. 40/2595 useless extension candidates. Maximal degree in co-relation 12391. Up to 2101 conditions per place. [2024-06-20 17:18:36,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-20 17:18:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 1163 flow [2024-06-20 17:18:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:18:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:18:36,319 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 759 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:18:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 1163 flow [2024-06-20 17:18:36,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 1096 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:36,349 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 746 flow [2024-06-20 17:18:36,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=746, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-20 17:18:36,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-20 17:18:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 746 flow [2024-06-20 17:18:36,349 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) [2024-06-20 17:18:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:18:36,350 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)] === [2024-06-20 17:18:36,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1117903603, now seen corresponding path program 4 times [2024-06-20 17:18:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878191618] [2024-06-20 17:18:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:38,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:38,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878191618] [2024-06-20 17:18:38,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878191618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:38,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:38,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955039066] [2024-06-20 17:18:38,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:38,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:38,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:38,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 746 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) [2024-06-20 17:18:38,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:38,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:38,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:40,030 INFO L124 PetriNetUnfolderBase]: 1693/2728 cut-off events. [2024-06-20 17:18:40,031 INFO L125 PetriNetUnfolderBase]: For 32055/32059 co-relation queries the response was YES. [2024-06-20 17:18:40,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 2728 events. 1693/2728 cut-off events. For 32055/32059 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14634 event pairs, 458 based on Foata normal form. 24/2751 useless extension candidates. Maximal degree in co-relation 12891. Up to 2267 conditions per place. [2024-06-20 17:18:40,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-20 17:18:40,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 138 transitions, 1176 flow [2024-06-20 17:18:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:18:40,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:18:40,048 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 746 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:18:40,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 138 transitions, 1176 flow [2024-06-20 17:18:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1122 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:18:40,067 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 793 flow [2024-06-20 17:18:40,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-06-20 17:18:40,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 17:18:40,068 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 793 flow [2024-06-20 17:18:40,068 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) [2024-06-20 17:18:40,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:40,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:40,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:18:40,068 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)] === [2024-06-20 17:18:40,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash -945593269, now seen corresponding path program 1 times [2024-06-20 17:18:40,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:40,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026708869] [2024-06-20 17:18:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:40,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:42,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:42,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026708869] [2024-06-20 17:18:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026708869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:42,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:42,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:42,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642494128] [2024-06-20 17:18:42,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:42,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:42,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:42,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 793 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:42,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:42,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:42,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:44,084 INFO L124 PetriNetUnfolderBase]: 1741/2806 cut-off events. [2024-06-20 17:18:44,084 INFO L125 PetriNetUnfolderBase]: For 34762/34766 co-relation queries the response was YES. [2024-06-20 17:18:44,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13518 conditions, 2806 events. 1741/2806 cut-off events. For 34762/34766 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15238 event pairs, 447 based on Foata normal form. 16/2821 useless extension candidates. Maximal degree in co-relation 13477. Up to 1953 conditions per place. [2024-06-20 17:18:44,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-20 17:18:44,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1243 flow [2024-06-20 17:18:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:18:44,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 17:18:44,102 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 793 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:18:44,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1243 flow [2024-06-20 17:18:44,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1166 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:44,125 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 826 flow [2024-06-20 17:18:44,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2024-06-20 17:18:44,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 17:18:44,126 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 826 flow [2024-06-20 17:18:44,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:44,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:44,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:18:44,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:44,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash -707874277, now seen corresponding path program 1 times [2024-06-20 17:18:44,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:44,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476353473] [2024-06-20 17:18:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:46,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476353473] [2024-06-20 17:18:46,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476353473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:46,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:46,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:18:46,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889865800] [2024-06-20 17:18:46,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:46,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:18:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:18:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:18:46,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 826 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) [2024-06-20 17:18:46,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:46,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:46,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:47,274 INFO L124 PetriNetUnfolderBase]: 1751/2834 cut-off events. [2024-06-20 17:18:47,274 INFO L125 PetriNetUnfolderBase]: For 35570/35570 co-relation queries the response was YES. [2024-06-20 17:18:47,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13731 conditions, 2834 events. 1751/2834 cut-off events. For 35570/35570 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15537 event pairs, 599 based on Foata normal form. 2/2835 useless extension candidates. Maximal degree in co-relation 13689. Up to 2605 conditions per place. [2024-06-20 17:18:47,287 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 95 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-20 17:18:47,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 125 transitions, 1228 flow [2024-06-20 17:18:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:18:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:18:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 17:18:47,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 17:18:47,288 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 826 flow. Second operand 6 states and 115 transitions. [2024-06-20 17:18:47,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 125 transitions, 1228 flow [2024-06-20 17:18:47,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 1136 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:47,314 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 822 flow [2024-06-20 17:18:47,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=822, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-06-20 17:18:47,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 17:18:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 822 flow [2024-06-20 17:18:47,315 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) [2024-06-20 17:18:47,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:18:47,315 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)] === [2024-06-20 17:18:47,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash 772231403, now seen corresponding path program 5 times [2024-06-20 17:18:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:47,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408354088] [2024-06-20 17:18:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:49,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:49,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408354088] [2024-06-20 17:18:49,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408354088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:49,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:49,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286939272] [2024-06-20 17:18:49,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:49,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:49,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 822 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) [2024-06-20 17:18:49,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:49,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:50,843 INFO L124 PetriNetUnfolderBase]: 1783/2887 cut-off events. [2024-06-20 17:18:50,843 INFO L125 PetriNetUnfolderBase]: For 39475/39475 co-relation queries the response was YES. [2024-06-20 17:18:50,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13772 conditions, 2887 events. 1783/2887 cut-off events. For 39475/39475 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15942 event pairs, 487 based on Foata normal form. 20/2903 useless extension candidates. Maximal degree in co-relation 13729. Up to 2425 conditions per place. [2024-06-20 17:18:50,857 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-20 17:18:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 138 transitions, 1242 flow [2024-06-20 17:18:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:18:50,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:18:50,860 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 822 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:18:50,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 138 transitions, 1242 flow [2024-06-20 17:18:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 138 transitions, 1199 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 17:18:50,881 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 884 flow [2024-06-20 17:18:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=884, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2024-06-20 17:18:50,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 17:18:50,882 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 884 flow [2024-06-20 17:18:50,882 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) [2024-06-20 17:18:50,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:50,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:50,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:18:50,883 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)] === [2024-06-20 17:18:50,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 140483821, now seen corresponding path program 2 times [2024-06-20 17:18:50,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:50,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259261922] [2024-06-20 17:18:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:50,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:53,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:53,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259261922] [2024-06-20 17:18:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259261922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:53,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:53,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:53,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175019734] [2024-06-20 17:18:53,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:53,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:53,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:53,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:53,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 884 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:53,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:53,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:53,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:54,883 INFO L124 PetriNetUnfolderBase]: 1831/2977 cut-off events. [2024-06-20 17:18:54,884 INFO L125 PetriNetUnfolderBase]: For 43299/43299 co-relation queries the response was YES. [2024-06-20 17:18:54,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14436 conditions, 2977 events. 1831/2977 cut-off events. For 43299/43299 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16671 event pairs, 487 based on Foata normal form. 12/2985 useless extension candidates. Maximal degree in co-relation 14392. Up to 2403 conditions per place. [2024-06-20 17:18:54,898 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 35 changer transitions 0/141 dead transitions. [2024-06-20 17:18:54,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 141 transitions, 1324 flow [2024-06-20 17:18:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:18:54,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:18:54,900 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 884 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:18:54,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 141 transitions, 1324 flow [2024-06-20 17:18:54,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1243 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:54,927 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 913 flow [2024-06-20 17:18:54,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-20 17:18:54,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:18:54,928 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 913 flow [2024-06-20 17:18:54,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:54,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:54,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:54,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:18:54,928 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)] === [2024-06-20 17:18:54,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash 425583691, now seen corresponding path program 3 times [2024-06-20 17:18:54,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:54,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820044729] [2024-06-20 17:18:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:18:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:18:57,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:18:57,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820044729] [2024-06-20 17:18:57,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820044729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:18:57,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:18:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:18:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640970510] [2024-06-20 17:18:57,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:18:57,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:18:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:18:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:18:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:18:57,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:18:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:18:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:18:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:18:58,998 INFO L124 PetriNetUnfolderBase]: 1811/2945 cut-off events. [2024-06-20 17:18:58,998 INFO L125 PetriNetUnfolderBase]: For 42367/42367 co-relation queries the response was YES. [2024-06-20 17:18:59,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14033 conditions, 2945 events. 1811/2945 cut-off events. For 42367/42367 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16478 event pairs, 434 based on Foata normal form. 12/2953 useless extension candidates. Maximal degree in co-relation 13988. Up to 1693 conditions per place. [2024-06-20 17:18:59,012 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 92 selfloop transitions, 43 changer transitions 0/140 dead transitions. [2024-06-20 17:18:59,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 140 transitions, 1279 flow [2024-06-20 17:18:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:18:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:18:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:18:59,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:18:59,014 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 913 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:18:59,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 140 transitions, 1279 flow [2024-06-20 17:18:59,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 1187 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:18:59,045 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 871 flow [2024-06-20 17:18:59,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2024-06-20 17:18:59,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-20 17:18:59,045 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 871 flow [2024-06-20 17:18:59,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:18:59,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:18:59,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:18:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:18:59,046 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:18:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:18:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -696446437, now seen corresponding path program 2 times [2024-06-20 17:18:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:18:59,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233415777] [2024-06-20 17:18:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:18:59,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:18:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:01,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233415777] [2024-06-20 17:19:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233415777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:01,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:01,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081430388] [2024-06-20 17:19:01,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:01,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:01,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:01,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 871 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) [2024-06-20 17:19:01,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:01,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:01,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:02,667 INFO L124 PetriNetUnfolderBase]: 1785/2913 cut-off events. [2024-06-20 17:19:02,668 INFO L125 PetriNetUnfolderBase]: For 41985/41985 co-relation queries the response was YES. [2024-06-20 17:19:02,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 2913 events. 1785/2913 cut-off events. For 41985/41985 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16379 event pairs, 585 based on Foata normal form. 6/2915 useless extension candidates. Maximal degree in co-relation 13786. Up to 2698 conditions per place. [2024-06-20 17:19:02,684 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 87 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-20 17:19:02,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 116 transitions, 1149 flow [2024-06-20 17:19:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:19:02,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:19:02,685 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 871 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:19:02,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 116 transitions, 1149 flow [2024-06-20 17:19:02,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 116 transitions, 1010 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 17:19:02,712 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 788 flow [2024-06-20 17:19:02,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2024-06-20 17:19:02,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:19:02,712 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 788 flow [2024-06-20 17:19:02,713 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) [2024-06-20 17:19:02,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:02,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:02,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:19:02,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:02,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1431307417, now seen corresponding path program 1 times [2024-06-20 17:19:02,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:02,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930187495] [2024-06-20 17:19:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:02,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:04,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930187495] [2024-06-20 17:19:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930187495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:04,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:04,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020956389] [2024-06-20 17:19:04,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:04,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:04,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 788 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) [2024-06-20 17:19:04,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:04,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:04,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:05,842 INFO L124 PetriNetUnfolderBase]: 1795/2932 cut-off events. [2024-06-20 17:19:05,842 INFO L125 PetriNetUnfolderBase]: For 41387/41387 co-relation queries the response was YES. [2024-06-20 17:19:05,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13515 conditions, 2932 events. 1795/2932 cut-off events. For 41387/41387 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16493 event pairs, 623 based on Foata normal form. 2/2933 useless extension candidates. Maximal degree in co-relation 13469. Up to 2776 conditions per place. [2024-06-20 17:19:05,857 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2024-06-20 17:19:05,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 125 transitions, 1184 flow [2024-06-20 17:19:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:19:05,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:19:05,858 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 788 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:19:05,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 125 transitions, 1184 flow [2024-06-20 17:19:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 125 transitions, 1113 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:05,891 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 817 flow [2024-06-20 17:19:05,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=817, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-06-20 17:19:05,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 17:19:05,891 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 817 flow [2024-06-20 17:19:05,892 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) [2024-06-20 17:19:05,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:05,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:05,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:19:05,892 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:05,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -37760483, now seen corresponding path program 2 times [2024-06-20 17:19:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:05,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098387214] [2024-06-20 17:19:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:08,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098387214] [2024-06-20 17:19:08,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098387214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:08,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:08,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:19:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428270979] [2024-06-20 17:19:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:19:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:19:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:19:08,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:08,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 817 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) [2024-06-20 17:19:08,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:08,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:08,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:09,003 INFO L124 PetriNetUnfolderBase]: 1789/2918 cut-off events. [2024-06-20 17:19:09,003 INFO L125 PetriNetUnfolderBase]: For 44231/44231 co-relation queries the response was YES. [2024-06-20 17:19:09,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13746 conditions, 2918 events. 1789/2918 cut-off events. For 44231/44231 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16373 event pairs, 659 based on Foata normal form. 2/2919 useless extension candidates. Maximal degree in co-relation 13699. Up to 2801 conditions per place. [2024-06-20 17:19:09,019 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-20 17:19:09,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 1079 flow [2024-06-20 17:19:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:19:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:19:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 17:19:09,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 17:19:09,020 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 817 flow. Second operand 6 states and 96 transitions. [2024-06-20 17:19:09,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 1079 flow [2024-06-20 17:19:09,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 119 transitions, 1035 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 17:19:09,050 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 801 flow [2024-06-20 17:19:09,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=801, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2024-06-20 17:19:09,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-20 17:19:09,051 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 801 flow [2024-06-20 17:19:09,051 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) [2024-06-20 17:19:09,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:09,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:09,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:19:09,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:09,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:09,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1420858920, now seen corresponding path program 1 times [2024-06-20 17:19:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946709151] [2024-06-20 17:19:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:11,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946709151] [2024-06-20 17:19:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946709151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:11,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413613083] [2024-06-20 17:19:11,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:11,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:11,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:11,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 801 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) [2024-06-20 17:19:11,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:11,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:11,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:12,759 INFO L124 PetriNetUnfolderBase]: 1885/3067 cut-off events. [2024-06-20 17:19:12,760 INFO L125 PetriNetUnfolderBase]: For 51521/51521 co-relation queries the response was YES. [2024-06-20 17:19:12,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14580 conditions, 3067 events. 1885/3067 cut-off events. For 51521/51521 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17324 event pairs, 605 based on Foata normal form. 8/3073 useless extension candidates. Maximal degree in co-relation 14531. Up to 2634 conditions per place. [2024-06-20 17:19:12,779 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-20 17:19:12,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 153 transitions, 1441 flow [2024-06-20 17:19:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:19:12,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 17:19:12,781 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 801 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:19:12,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 153 transitions, 1441 flow [2024-06-20 17:19:12,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1407 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:12,811 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1022 flow [2024-06-20 17:19:12,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-20 17:19:12,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-20 17:19:12,811 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1022 flow [2024-06-20 17:19:12,811 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) [2024-06-20 17:19:12,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:12,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:19:12,812 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)] === [2024-06-20 17:19:12,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1170365630, now seen corresponding path program 2 times [2024-06-20 17:19:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867538426] [2024-06-20 17:19:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:15,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:15,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867538426] [2024-06-20 17:19:15,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867538426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:15,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704720662] [2024-06-20 17:19:15,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:15,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:15,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:15,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:15,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1022 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) [2024-06-20 17:19:15,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:15,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:15,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:16,636 INFO L124 PetriNetUnfolderBase]: 2057/3289 cut-off events. [2024-06-20 17:19:16,636 INFO L125 PetriNetUnfolderBase]: For 64146/64146 co-relation queries the response was YES. [2024-06-20 17:19:16,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16835 conditions, 3289 events. 2057/3289 cut-off events. For 64146/64146 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18358 event pairs, 600 based on Foata normal form. 12/3297 useless extension candidates. Maximal degree in co-relation 16783. Up to 2852 conditions per place. [2024-06-20 17:19:16,654 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 53 changer transitions 0/167 dead transitions. [2024-06-20 17:19:16,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 167 transitions, 1721 flow [2024-06-20 17:19:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:19:16,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:19:16,656 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1022 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:19:16,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 167 transitions, 1721 flow [2024-06-20 17:19:16,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1659 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-20 17:19:16,701 INFO L231 Difference]: Finished difference. Result has 122 places, 142 transitions, 1305 flow [2024-06-20 17:19:16,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1305, PETRI_PLACES=122, PETRI_TRANSITIONS=142} [2024-06-20 17:19:16,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-20 17:19:16,702 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 142 transitions, 1305 flow [2024-06-20 17:19:16,702 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) [2024-06-20 17:19:16,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:16,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:16,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:19:16,703 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:16,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:16,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1835508140, now seen corresponding path program 3 times [2024-06-20 17:19:16,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:16,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715633464] [2024-06-20 17:19:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:16,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:19,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:19,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715633464] [2024-06-20 17:19:19,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715633464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:19,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:19,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747755073] [2024-06-20 17:19:19,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:19,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:19,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 142 transitions, 1305 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) [2024-06-20 17:19:19,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:19,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:19,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:20,190 INFO L124 PetriNetUnfolderBase]: 2037/3259 cut-off events. [2024-06-20 17:19:20,190 INFO L125 PetriNetUnfolderBase]: For 65895/65895 co-relation queries the response was YES. [2024-06-20 17:19:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17154 conditions, 3259 events. 2037/3259 cut-off events. For 65895/65895 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18238 event pairs, 598 based on Foata normal form. 12/3267 useless extension candidates. Maximal degree in co-relation 17098. Up to 2848 conditions per place. [2024-06-20 17:19:20,210 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 48 changer transitions 0/160 dead transitions. [2024-06-20 17:19:20,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 160 transitions, 1717 flow [2024-06-20 17:19:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:19:20,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 17:19:20,211 INFO L175 Difference]: Start difference. First operand has 122 places, 142 transitions, 1305 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:19:20,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 160 transitions, 1717 flow [2024-06-20 17:19:20,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1554 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:20,262 INFO L231 Difference]: Finished difference. Result has 125 places, 142 transitions, 1249 flow [2024-06-20 17:19:20,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1249, PETRI_PLACES=125, PETRI_TRANSITIONS=142} [2024-06-20 17:19:20,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 17:19:20,263 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 142 transitions, 1249 flow [2024-06-20 17:19:20,263 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) [2024-06-20 17:19:20,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:20,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:19:20,263 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:20,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash -114570524, now seen corresponding path program 1 times [2024-06-20 17:19:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:20,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622068132] [2024-06-20 17:19:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:23,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622068132] [2024-06-20 17:19:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622068132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:23,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:23,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:19:23,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970524218] [2024-06-20 17:19:23,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:23,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:19:23,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:23,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:19:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:19:23,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:23,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 142 transitions, 1249 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) [2024-06-20 17:19:23,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:23,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:23,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:24,555 INFO L124 PetriNetUnfolderBase]: 2076/3328 cut-off events. [2024-06-20 17:19:24,556 INFO L125 PetriNetUnfolderBase]: For 68851/68851 co-relation queries the response was YES. [2024-06-20 17:19:24,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17286 conditions, 3328 events. 2076/3328 cut-off events. For 68851/68851 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18716 event pairs, 619 based on Foata normal form. 14/3338 useless extension candidates. Maximal degree in co-relation 17228. Up to 3055 conditions per place. [2024-06-20 17:19:24,574 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 32 changer transitions 0/165 dead transitions. [2024-06-20 17:19:24,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 165 transitions, 1682 flow [2024-06-20 17:19:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:19:24,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:19:24,575 INFO L175 Difference]: Start difference. First operand has 125 places, 142 transitions, 1249 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:19:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 165 transitions, 1682 flow [2024-06-20 17:19:24,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 165 transitions, 1586 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:24,619 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1258 flow [2024-06-20 17:19:24,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-20 17:19:24,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-20 17:19:24,619 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1258 flow [2024-06-20 17:19:24,619 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) [2024-06-20 17:19:24,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:24,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:24,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:19:24,620 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:24,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash -931714404, now seen corresponding path program 1 times [2024-06-20 17:19:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784125892] [2024-06-20 17:19:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:26,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:26,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784125892] [2024-06-20 17:19:26,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784125892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:26,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:26,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896626158] [2024-06-20 17:19:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:26,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1258 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) [2024-06-20 17:19:26,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:26,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:27,959 INFO L124 PetriNetUnfolderBase]: 2200/3551 cut-off events. [2024-06-20 17:19:27,959 INFO L125 PetriNetUnfolderBase]: For 69967/69969 co-relation queries the response was YES. [2024-06-20 17:19:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18467 conditions, 3551 events. 2200/3551 cut-off events. For 69967/69969 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20342 event pairs, 653 based on Foata normal form. 4/3554 useless extension candidates. Maximal degree in co-relation 18408. Up to 2949 conditions per place. [2024-06-20 17:19:27,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 65 changer transitions 0/213 dead transitions. [2024-06-20 17:19:27,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 213 transitions, 2253 flow [2024-06-20 17:19:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:19:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:19:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 17:19:27,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 17:19:27,983 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1258 flow. Second operand 8 states and 157 transitions. [2024-06-20 17:19:27,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 213 transitions, 2253 flow [2024-06-20 17:19:28,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 213 transitions, 2162 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:28,040 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1634 flow [2024-06-20 17:19:28,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1634, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-20 17:19:28,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-20 17:19:28,041 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1634 flow [2024-06-20 17:19:28,041 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) [2024-06-20 17:19:28,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:28,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:28,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:19:28,041 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:28,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 857612666, now seen corresponding path program 2 times [2024-06-20 17:19:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:28,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290260456] [2024-06-20 17:19:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:28,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290260456] [2024-06-20 17:19:30,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290260456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:30,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:30,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:30,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769499294] [2024-06-20 17:19:30,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:30,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1634 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) [2024-06-20 17:19:30,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:30,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:30,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:31,690 INFO L124 PetriNetUnfolderBase]: 2268/3649 cut-off events. [2024-06-20 17:19:31,690 INFO L125 PetriNetUnfolderBase]: For 78903/78905 co-relation queries the response was YES. [2024-06-20 17:19:31,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 3649 events. 2268/3649 cut-off events. For 78903/78905 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20838 event pairs, 665 based on Foata normal form. 6/3654 useless extension candidates. Maximal degree in co-relation 19856. Up to 2994 conditions per place. [2024-06-20 17:19:31,718 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 132 selfloop transitions, 77 changer transitions 0/214 dead transitions. [2024-06-20 17:19:31,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 214 transitions, 2419 flow [2024-06-20 17:19:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 17:19:31,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-20 17:19:31,719 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1634 flow. Second operand 7 states and 137 transitions. [2024-06-20 17:19:31,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 214 transitions, 2419 flow [2024-06-20 17:19:31,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 214 transitions, 2363 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-20 17:19:31,783 INFO L231 Difference]: Finished difference. Result has 138 places, 181 transitions, 1886 flow [2024-06-20 17:19:31,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1886, PETRI_PLACES=138, PETRI_TRANSITIONS=181} [2024-06-20 17:19:31,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-20 17:19:31,784 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 181 transitions, 1886 flow [2024-06-20 17:19:31,784 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) [2024-06-20 17:19:31,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:31,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:31,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:19:31,785 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:31,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1443114378, now seen corresponding path program 3 times [2024-06-20 17:19:31,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:31,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293987215] [2024-06-20 17:19:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:31,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:34,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:34,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293987215] [2024-06-20 17:19:34,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293987215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:34,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:34,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49064950] [2024-06-20 17:19:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:34,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:34,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:34,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:34,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 181 transitions, 1886 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) [2024-06-20 17:19:34,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:34,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:35,467 INFO L124 PetriNetUnfolderBase]: 2282/3643 cut-off events. [2024-06-20 17:19:35,467 INFO L125 PetriNetUnfolderBase]: For 84726/84726 co-relation queries the response was YES. [2024-06-20 17:19:35,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20497 conditions, 3643 events. 2282/3643 cut-off events. For 84726/84726 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20643 event pairs, 657 based on Foata normal form. 6/3648 useless extension candidates. Maximal degree in co-relation 20431. Up to 3365 conditions per place. [2024-06-20 17:19:35,490 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 162 selfloop transitions, 44 changer transitions 0/211 dead transitions. [2024-06-20 17:19:35,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 211 transitions, 2465 flow [2024-06-20 17:19:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 17:19:35,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 17:19:35,492 INFO L175 Difference]: Start difference. First operand has 138 places, 181 transitions, 1886 flow. Second operand 7 states and 127 transitions. [2024-06-20 17:19:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 211 transitions, 2465 flow [2024-06-20 17:19:35,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 211 transitions, 2333 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 17:19:35,574 INFO L231 Difference]: Finished difference. Result has 141 places, 187 transitions, 1950 flow [2024-06-20 17:19:35,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1950, PETRI_PLACES=141, PETRI_TRANSITIONS=187} [2024-06-20 17:19:35,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-20 17:19:35,574 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 187 transitions, 1950 flow [2024-06-20 17:19:35,574 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) [2024-06-20 17:19:35,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:35,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:19:35,575 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)] === [2024-06-20 17:19:35,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 444235898, now seen corresponding path program 4 times [2024-06-20 17:19:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:35,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4659298] [2024-06-20 17:19:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4659298] [2024-06-20 17:19:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4659298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:37,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282659992] [2024-06-20 17:19:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:37,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:37,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 187 transitions, 1950 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) [2024-06-20 17:19:37,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:37,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:37,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:39,112 INFO L124 PetriNetUnfolderBase]: 2286/3670 cut-off events. [2024-06-20 17:19:39,112 INFO L125 PetriNetUnfolderBase]: For 82787/82787 co-relation queries the response was YES. [2024-06-20 17:19:39,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20286 conditions, 3670 events. 2286/3670 cut-off events. For 82787/82787 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20918 event pairs, 650 based on Foata normal form. 4/3671 useless extension candidates. Maximal degree in co-relation 20220. Up to 3014 conditions per place. [2024-06-20 17:19:39,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 73 changer transitions 0/219 dead transitions. [2024-06-20 17:19:39,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 2636 flow [2024-06-20 17:19:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:19:39,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:19:39,140 INFO L175 Difference]: Start difference. First operand has 141 places, 187 transitions, 1950 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:19:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 2636 flow [2024-06-20 17:19:39,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 219 transitions, 2522 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:19:39,219 INFO L231 Difference]: Finished difference. Result has 143 places, 190 transitions, 2031 flow [2024-06-20 17:19:39,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2031, PETRI_PLACES=143, PETRI_TRANSITIONS=190} [2024-06-20 17:19:39,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 17:19:39,220 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 190 transitions, 2031 flow [2024-06-20 17:19:39,220 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) [2024-06-20 17:19:39,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:39,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:39,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:19:39,220 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)] === [2024-06-20 17:19:39,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1494235266, now seen corresponding path program 5 times [2024-06-20 17:19:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:39,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131858920] [2024-06-20 17:19:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131858920] [2024-06-20 17:19:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131858920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719324349] [2024-06-20 17:19:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:41,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:41,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 190 transitions, 2031 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) [2024-06-20 17:19:41,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:41,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:41,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:43,290 INFO L124 PetriNetUnfolderBase]: 2260/3634 cut-off events. [2024-06-20 17:19:43,290 INFO L125 PetriNetUnfolderBase]: For 85676/85676 co-relation queries the response was YES. [2024-06-20 17:19:43,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20283 conditions, 3634 events. 2260/3634 cut-off events. For 85676/85676 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20703 event pairs, 649 based on Foata normal form. 6/3637 useless extension candidates. Maximal degree in co-relation 20216. Up to 2995 conditions per place. [2024-06-20 17:19:43,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 141 selfloop transitions, 69 changer transitions 0/215 dead transitions. [2024-06-20 17:19:43,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2593 flow [2024-06-20 17:19:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:19:43,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 17:19:43,317 INFO L175 Difference]: Start difference. First operand has 143 places, 190 transitions, 2031 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:19:43,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2593 flow [2024-06-20 17:19:43,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 215 transitions, 2498 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:43,407 INFO L231 Difference]: Finished difference. Result has 147 places, 190 transitions, 2082 flow [2024-06-20 17:19:43,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2082, PETRI_PLACES=147, PETRI_TRANSITIONS=190} [2024-06-20 17:19:43,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-20 17:19:43,408 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 190 transitions, 2082 flow [2024-06-20 17:19:43,408 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) [2024-06-20 17:19:43,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:43,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:43,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:19:43,408 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)] === [2024-06-20 17:19:43,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1629941466, now seen corresponding path program 6 times [2024-06-20 17:19:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126245468] [2024-06-20 17:19:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126245468] [2024-06-20 17:19:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126245468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467481882] [2024-06-20 17:19:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:46,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:46,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 190 transitions, 2082 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) [2024-06-20 17:19:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:47,342 INFO L124 PetriNetUnfolderBase]: 2216/3557 cut-off events. [2024-06-20 17:19:47,342 INFO L125 PetriNetUnfolderBase]: For 87249/87249 co-relation queries the response was YES. [2024-06-20 17:19:47,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19691 conditions, 3557 events. 2216/3557 cut-off events. For 87249/87249 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20186 event pairs, 612 based on Foata normal form. 12/3564 useless extension candidates. Maximal degree in co-relation 19623. Up to 3060 conditions per place. [2024-06-20 17:19:47,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 66 changer transitions 0/215 dead transitions. [2024-06-20 17:19:47,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 215 transitions, 2649 flow [2024-06-20 17:19:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:19:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:19:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:19:47,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:19:47,370 INFO L175 Difference]: Start difference. First operand has 147 places, 190 transitions, 2082 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:19:47,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 215 transitions, 2649 flow [2024-06-20 17:19:47,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 215 transitions, 2477 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:47,494 INFO L231 Difference]: Finished difference. Result has 150 places, 190 transitions, 2056 flow [2024-06-20 17:19:47,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=150, PETRI_TRANSITIONS=190} [2024-06-20 17:19:47,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 17:19:47,495 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 190 transitions, 2056 flow [2024-06-20 17:19:47,495 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) [2024-06-20 17:19:47,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:47,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:19:47,495 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:19:47,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1212232826, now seen corresponding path program 7 times [2024-06-20 17:19:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784068564] [2024-06-20 17:19:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:50,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:50,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784068564] [2024-06-20 17:19:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784068564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:50,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:50,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506234948] [2024-06-20 17:19:50,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:50,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:50,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:50,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:50,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:50,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 190 transitions, 2056 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) [2024-06-20 17:19:50,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:50,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:50,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:51,282 INFO L124 PetriNetUnfolderBase]: 2190/3517 cut-off events. [2024-06-20 17:19:51,283 INFO L125 PetriNetUnfolderBase]: For 82799/82799 co-relation queries the response was YES. [2024-06-20 17:19:51,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19288 conditions, 3517 events. 2190/3517 cut-off events. For 82799/82799 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19945 event pairs, 614 based on Foata normal form. 6/3518 useless extension candidates. Maximal degree in co-relation 19219. Up to 3041 conditions per place. [2024-06-20 17:19:51,309 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 60 changer transitions 0/208 dead transitions. [2024-06-20 17:19:51,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 208 transitions, 2516 flow [2024-06-20 17:19:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:19:51,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:19:51,311 INFO L175 Difference]: Start difference. First operand has 150 places, 190 transitions, 2056 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:19:51,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 208 transitions, 2516 flow [2024-06-20 17:19:51,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 208 transitions, 2313 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 17:19:51,391 INFO L231 Difference]: Finished difference. Result has 149 places, 190 transitions, 1982 flow [2024-06-20 17:19:51,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1982, PETRI_PLACES=149, PETRI_TRANSITIONS=190} [2024-06-20 17:19:51,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 17:19:51,392 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 190 transitions, 1982 flow [2024-06-20 17:19:51,392 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) [2024-06-20 17:19:51,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:19:51,393 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)] === [2024-06-20 17:19:51,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1094093624, now seen corresponding path program 1 times [2024-06-20 17:19:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:51,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104749851] [2024-06-20 17:19:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:51,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:54,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104749851] [2024-06-20 17:19:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104749851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:54,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:54,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:54,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683684004] [2024-06-20 17:19:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:54,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:54,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:54,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:54,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:54,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 190 transitions, 1982 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:54,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:54,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:54,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:55,294 INFO L124 PetriNetUnfolderBase]: 2198/3549 cut-off events. [2024-06-20 17:19:55,294 INFO L125 PetriNetUnfolderBase]: For 83495/83495 co-relation queries the response was YES. [2024-06-20 17:19:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19305 conditions, 3549 events. 2198/3549 cut-off events. For 83495/83495 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20288 event pairs, 639 based on Foata normal form. 2/3550 useless extension candidates. Maximal degree in co-relation 19235. Up to 3317 conditions per place. [2024-06-20 17:19:55,318 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 21 changer transitions 0/218 dead transitions. [2024-06-20 17:19:55,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 218 transitions, 2622 flow [2024-06-20 17:19:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:19:55,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 17:19:55,319 INFO L175 Difference]: Start difference. First operand has 149 places, 190 transitions, 1982 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:19:55,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 218 transitions, 2622 flow [2024-06-20 17:19:55,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 218 transitions, 2502 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 17:19:55,400 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 1977 flow [2024-06-20 17:19:55,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1977, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-06-20 17:19:55,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-20 17:19:55,401 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 1977 flow [2024-06-20 17:19:55,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:55,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:55,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:55,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:19:55,401 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)] === [2024-06-20 17:19:55,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 565785220, now seen corresponding path program 2 times [2024-06-20 17:19:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:55,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151867210] [2024-06-20 17:19:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:19:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:19:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:19:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151867210] [2024-06-20 17:19:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151867210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:19:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:19:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:19:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67337672] [2024-06-20 17:19:58,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:19:58,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:19:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:19:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:19:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:19:58,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:19:58,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 1977 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:58,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:19:58,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:19:58,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:19:59,459 INFO L124 PetriNetUnfolderBase]: 2206/3567 cut-off events. [2024-06-20 17:19:59,459 INFO L125 PetriNetUnfolderBase]: For 87459/87459 co-relation queries the response was YES. [2024-06-20 17:19:59,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19388 conditions, 3567 events. 2206/3567 cut-off events. For 87459/87459 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20495 event pairs, 675 based on Foata normal form. 2/3568 useless extension candidates. Maximal degree in co-relation 19317. Up to 3364 conditions per place. [2024-06-20 17:19:59,480 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2024-06-20 17:19:59,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 215 transitions, 2493 flow [2024-06-20 17:19:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:19:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:19:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 17:19:59,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 17:19:59,482 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 1977 flow. Second operand 7 states and 115 transitions. [2024-06-20 17:19:59,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 215 transitions, 2493 flow [2024-06-20 17:19:59,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2423 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:19:59,564 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 1988 flow [2024-06-20 17:19:59,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1988, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-20 17:19:59,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 17:19:59,565 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 1988 flow [2024-06-20 17:19:59,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:19:59,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:19:59,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:19:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:19:59,565 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)] === [2024-06-20 17:19:59,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:19:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1928028228, now seen corresponding path program 3 times [2024-06-20 17:19:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:19:59,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048448446] [2024-06-20 17:19:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:19:59,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:19:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:03,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048448446] [2024-06-20 17:20:03,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048448446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:03,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:03,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:03,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14243942] [2024-06-20 17:20:03,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:03,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:03,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:03,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:03,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:03,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 1988 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) [2024-06-20 17:20:03,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:03,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:03,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:04,099 INFO L124 PetriNetUnfolderBase]: 2201/3564 cut-off events. [2024-06-20 17:20:04,099 INFO L125 PetriNetUnfolderBase]: For 89534/89534 co-relation queries the response was YES. [2024-06-20 17:20:04,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19350 conditions, 3564 events. 2201/3564 cut-off events. For 89534/89534 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20480 event pairs, 729 based on Foata normal form. 2/3565 useless extension candidates. Maximal degree in co-relation 19277. Up to 3387 conditions per place. [2024-06-20 17:20:04,123 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 13 changer transitions 0/210 dead transitions. [2024-06-20 17:20:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 2440 flow [2024-06-20 17:20:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 17:20:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-20 17:20:04,124 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 1988 flow. Second operand 7 states and 108 transitions. [2024-06-20 17:20:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 2440 flow [2024-06-20 17:20:04,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 210 transitions, 2377 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:04,216 INFO L231 Difference]: Finished difference. Result has 156 places, 196 transitions, 1956 flow [2024-06-20 17:20:04,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1956, PETRI_PLACES=156, PETRI_TRANSITIONS=196} [2024-06-20 17:20:04,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-20 17:20:04,217 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 196 transitions, 1956 flow [2024-06-20 17:20:04,217 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) [2024-06-20 17:20:04,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:04,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:20:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:20:04,217 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)] === [2024-06-20 17:20:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1552639971, now seen corresponding path program 1 times [2024-06-20 17:20:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:04,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489351592] [2024-06-20 17:20:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489351592] [2024-06-20 17:20:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489351592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:08,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:08,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:08,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831729202] [2024-06-20 17:20:08,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:08,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:08,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:08,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:08,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:08,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 1956 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) [2024-06-20 17:20:08,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:08,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:08,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:09,340 INFO L124 PetriNetUnfolderBase]: 2253/3638 cut-off events. [2024-06-20 17:20:09,341 INFO L125 PetriNetUnfolderBase]: For 102504/102504 co-relation queries the response was YES. [2024-06-20 17:20:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 3638 events. 2253/3638 cut-off events. For 102504/102504 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20894 event pairs, 627 based on Foata normal form. 14/3647 useless extension candidates. Maximal degree in co-relation 19695. Up to 3296 conditions per place. [2024-06-20 17:20:09,362 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 34 changer transitions 0/220 dead transitions. [2024-06-20 17:20:09,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 220 transitions, 2511 flow [2024-06-20 17:20:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:20:09,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:20:09,363 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 1956 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:20:09,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 220 transitions, 2511 flow [2024-06-20 17:20:09,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2473 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:09,463 INFO L231 Difference]: Finished difference. Result has 157 places, 198 transitions, 2025 flow [2024-06-20 17:20:09,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=157, PETRI_TRANSITIONS=198} [2024-06-20 17:20:09,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-20 17:20:09,464 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 198 transitions, 2025 flow [2024-06-20 17:20:09,464 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) [2024-06-20 17:20:09,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:09,464 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] [2024-06-20 17:20:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:20:09,464 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)] === [2024-06-20 17:20:09,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1515213041, now seen corresponding path program 2 times [2024-06-20 17:20:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276755137] [2024-06-20 17:20:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:12,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:12,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276755137] [2024-06-20 17:20:12,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276755137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:12,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:12,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860902613] [2024-06-20 17:20:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:12,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 198 transitions, 2025 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) [2024-06-20 17:20:12,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:12,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:12,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:13,767 INFO L124 PetriNetUnfolderBase]: 2314/3717 cut-off events. [2024-06-20 17:20:13,767 INFO L125 PetriNetUnfolderBase]: For 108067/108067 co-relation queries the response was YES. [2024-06-20 17:20:13,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20776 conditions, 3717 events. 2314/3717 cut-off events. For 108067/108067 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21289 event pairs, 644 based on Foata normal form. 8/3720 useless extension candidates. Maximal degree in co-relation 20701. Up to 3236 conditions per place. [2024-06-20 17:20:13,795 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 188 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2024-06-20 17:20:13,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 226 transitions, 2709 flow [2024-06-20 17:20:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:20:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:20:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:20:13,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 17:20:13,797 INFO L175 Difference]: Start difference. First operand has 157 places, 198 transitions, 2025 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:20:13,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 226 transitions, 2709 flow [2024-06-20 17:20:13,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 226 transitions, 2626 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:20:13,905 INFO L231 Difference]: Finished difference. Result has 159 places, 200 transitions, 2046 flow [2024-06-20 17:20:13,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=159, PETRI_TRANSITIONS=200} [2024-06-20 17:20:13,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-20 17:20:13,905 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 200 transitions, 2046 flow [2024-06-20 17:20:13,906 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) [2024-06-20 17:20:13,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:13,906 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] [2024-06-20 17:20:13,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:20:13,906 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)] === [2024-06-20 17:20:13,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1152386951, now seen corresponding path program 1 times [2024-06-20 17:20:13,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:13,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883854942] [2024-06-20 17:20:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:13,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:17,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:17,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883854942] [2024-06-20 17:20:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883854942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:17,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:17,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666103274] [2024-06-20 17:20:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:17,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:17,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:17,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 200 transitions, 2046 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) [2024-06-20 17:20:17,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:17,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:17,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:18,844 INFO L124 PetriNetUnfolderBase]: 2531/4091 cut-off events. [2024-06-20 17:20:18,844 INFO L125 PetriNetUnfolderBase]: For 142806/142806 co-relation queries the response was YES. [2024-06-20 17:20:18,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23606 conditions, 4091 events. 2531/4091 cut-off events. For 142806/142806 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23904 event pairs, 666 based on Foata normal form. 16/4104 useless extension candidates. Maximal degree in co-relation 23530. Up to 2866 conditions per place. [2024-06-20 17:20:18,873 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 75 changer transitions 0/248 dead transitions. [2024-06-20 17:20:18,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 248 transitions, 2956 flow [2024-06-20 17:20:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 17:20:18,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:20:18,874 INFO L175 Difference]: Start difference. First operand has 159 places, 200 transitions, 2046 flow. Second operand 8 states and 152 transitions. [2024-06-20 17:20:18,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 248 transitions, 2956 flow [2024-06-20 17:20:19,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 248 transitions, 2913 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:19,008 INFO L231 Difference]: Finished difference. Result has 165 places, 205 transitions, 2247 flow [2024-06-20 17:20:19,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2247, PETRI_PLACES=165, PETRI_TRANSITIONS=205} [2024-06-20 17:20:19,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-20 17:20:19,008 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 205 transitions, 2247 flow [2024-06-20 17:20:19,008 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) [2024-06-20 17:20:19,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:19,008 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] [2024-06-20 17:20:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:20:19,009 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)] === [2024-06-20 17:20:19,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1237381511, now seen corresponding path program 2 times [2024-06-20 17:20:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240165716] [2024-06-20 17:20:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:22,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:22,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240165716] [2024-06-20 17:20:22,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240165716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:22,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:22,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297979366] [2024-06-20 17:20:22,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:22,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:22,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:22,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:22,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 205 transitions, 2247 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) [2024-06-20 17:20:22,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:22,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:22,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:23,960 INFO L124 PetriNetUnfolderBase]: 2619/4217 cut-off events. [2024-06-20 17:20:23,960 INFO L125 PetriNetUnfolderBase]: For 160753/160753 co-relation queries the response was YES. [2024-06-20 17:20:23,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25149 conditions, 4217 events. 2619/4217 cut-off events. For 160753/160753 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 24613 event pairs, 759 based on Foata normal form. 24/4238 useless extension candidates. Maximal degree in co-relation 25070. Up to 3488 conditions per place. [2024-06-20 17:20:23,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 157 selfloop transitions, 76 changer transitions 0/238 dead transitions. [2024-06-20 17:20:23,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 238 transitions, 2859 flow [2024-06-20 17:20:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:20:23,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:20:23,997 INFO L175 Difference]: Start difference. First operand has 165 places, 205 transitions, 2247 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:20:23,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 238 transitions, 2859 flow [2024-06-20 17:20:24,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 238 transitions, 2752 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 17:20:24,207 INFO L231 Difference]: Finished difference. Result has 170 places, 207 transitions, 2340 flow [2024-06-20 17:20:24,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2140, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2340, PETRI_PLACES=170, PETRI_TRANSITIONS=207} [2024-06-20 17:20:24,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-20 17:20:24,208 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 207 transitions, 2340 flow [2024-06-20 17:20:24,208 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) [2024-06-20 17:20:24,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:24,208 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] [2024-06-20 17:20:24,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:20:24,209 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)] === [2024-06-20 17:20:24,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1154260901, now seen corresponding path program 3 times [2024-06-20 17:20:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472828037] [2024-06-20 17:20:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:27,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:27,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472828037] [2024-06-20 17:20:27,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472828037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:27,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:27,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:27,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81590814] [2024-06-20 17:20:27,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:27,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:27,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:27,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:27,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:28,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:28,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 207 transitions, 2340 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) [2024-06-20 17:20:28,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:28,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:28,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:29,360 INFO L124 PetriNetUnfolderBase]: 2770/4442 cut-off events. [2024-06-20 17:20:29,360 INFO L125 PetriNetUnfolderBase]: For 176136/176136 co-relation queries the response was YES. [2024-06-20 17:20:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27405 conditions, 4442 events. 2770/4442 cut-off events. For 176136/176136 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26135 event pairs, 768 based on Foata normal form. 16/4455 useless extension candidates. Maximal degree in co-relation 27324. Up to 3496 conditions per place. [2024-06-20 17:20:29,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 72 changer transitions 0/245 dead transitions. [2024-06-20 17:20:29,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 245 transitions, 3102 flow [2024-06-20 17:20:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:20:29,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:20:29,395 INFO L175 Difference]: Start difference. First operand has 170 places, 207 transitions, 2340 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:20:29,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 245 transitions, 3102 flow [2024-06-20 17:20:29,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 245 transitions, 2932 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:29,578 INFO L231 Difference]: Finished difference. Result has 173 places, 211 transitions, 2417 flow [2024-06-20 17:20:29,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2417, PETRI_PLACES=173, PETRI_TRANSITIONS=211} [2024-06-20 17:20:29,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-20 17:20:29,579 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 211 transitions, 2417 flow [2024-06-20 17:20:29,579 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) [2024-06-20 17:20:29,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:29,579 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] [2024-06-20 17:20:29,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:20:29,579 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)] === [2024-06-20 17:20:29,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash 360672749, now seen corresponding path program 4 times [2024-06-20 17:20:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:29,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032585985] [2024-06-20 17:20:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:29,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032585985] [2024-06-20 17:20:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032585985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:33,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:33,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398296087] [2024-06-20 17:20:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:33,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:33,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 211 transitions, 2417 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) [2024-06-20 17:20:33,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:33,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:33,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:34,663 INFO L124 PetriNetUnfolderBase]: 2998/4791 cut-off events. [2024-06-20 17:20:34,663 INFO L125 PetriNetUnfolderBase]: For 237736/237736 co-relation queries the response was YES. [2024-06-20 17:20:34,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29226 conditions, 4791 events. 2998/4791 cut-off events. For 237736/237736 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28270 event pairs, 834 based on Foata normal form. 68/4854 useless extension candidates. Maximal degree in co-relation 29143. Up to 3953 conditions per place. [2024-06-20 17:20:34,703 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 61 changer transitions 7/240 dead transitions. [2024-06-20 17:20:34,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 240 transitions, 3035 flow [2024-06-20 17:20:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:20:34,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:20:34,706 INFO L175 Difference]: Start difference. First operand has 173 places, 211 transitions, 2417 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:20:34,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 240 transitions, 3035 flow [2024-06-20 17:20:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 2916 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 17:20:34,929 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 2439 flow [2024-06-20 17:20:34,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-20 17:20:34,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 17:20:34,930 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 2439 flow [2024-06-20 17:20:34,930 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) [2024-06-20 17:20:34,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:34,930 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] [2024-06-20 17:20:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:20:34,930 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)] === [2024-06-20 17:20:34,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1075209337, now seen corresponding path program 5 times [2024-06-20 17:20:34,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98919383] [2024-06-20 17:20:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:34,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98919383] [2024-06-20 17:20:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98919383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085287902] [2024-06-20 17:20:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:38,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:38,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 2439 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) [2024-06-20 17:20:38,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:38,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:38,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:40,297 INFO L124 PetriNetUnfolderBase]: 3353/5368 cut-off events. [2024-06-20 17:20:40,298 INFO L125 PetriNetUnfolderBase]: For 293341/293341 co-relation queries the response was YES. [2024-06-20 17:20:40,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34346 conditions, 5368 events. 3353/5368 cut-off events. For 293341/293341 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32085 event pairs, 903 based on Foata normal form. 56/5419 useless extension candidates. Maximal degree in co-relation 34261. Up to 3662 conditions per place. [2024-06-20 17:20:40,346 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 59 changer transitions 0/246 dead transitions. [2024-06-20 17:20:40,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 246 transitions, 3257 flow [2024-06-20 17:20:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:20:40,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:20:40,348 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 2439 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:20:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 246 transitions, 3257 flow [2024-06-20 17:20:40,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 246 transitions, 3109 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:40,593 INFO L231 Difference]: Finished difference. Result has 180 places, 211 transitions, 2513 flow [2024-06-20 17:20:40,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2513, PETRI_PLACES=180, PETRI_TRANSITIONS=211} [2024-06-20 17:20:40,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 17:20:40,594 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 211 transitions, 2513 flow [2024-06-20 17:20:40,594 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) [2024-06-20 17:20:40,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:40,594 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] [2024-06-20 17:20:40,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:20:40,595 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)] === [2024-06-20 17:20:40,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1566664805, now seen corresponding path program 1 times [2024-06-20 17:20:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426329159] [2024-06-20 17:20:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:43,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426329159] [2024-06-20 17:20:43,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426329159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:43,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:43,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:43,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420837743] [2024-06-20 17:20:43,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:43,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:43,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:43,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:43,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:43,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 211 transitions, 2513 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) [2024-06-20 17:20:43,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:43,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:43,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:45,863 INFO L124 PetriNetUnfolderBase]: 3509/5632 cut-off events. [2024-06-20 17:20:45,863 INFO L125 PetriNetUnfolderBase]: For 306270/306270 co-relation queries the response was YES. [2024-06-20 17:20:45,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34920 conditions, 5632 events. 3509/5632 cut-off events. For 306270/306270 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33931 event pairs, 1121 based on Foata normal form. 68/5695 useless extension candidates. Maximal degree in co-relation 34833. Up to 4810 conditions per place. [2024-06-20 17:20:45,910 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 65 changer transitions 6/245 dead transitions. [2024-06-20 17:20:45,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 245 transitions, 3160 flow [2024-06-20 17:20:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 17:20:45,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 17:20:45,911 INFO L175 Difference]: Start difference. First operand has 180 places, 211 transitions, 2513 flow. Second operand 10 states and 171 transitions. [2024-06-20 17:20:45,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 245 transitions, 3160 flow [2024-06-20 17:20:46,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 245 transitions, 2975 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:20:46,209 INFO L231 Difference]: Finished difference. Result has 184 places, 209 transitions, 2488 flow [2024-06-20 17:20:46,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2488, PETRI_PLACES=184, PETRI_TRANSITIONS=209} [2024-06-20 17:20:46,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 17:20:46,210 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 209 transitions, 2488 flow [2024-06-20 17:20:46,210 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) [2024-06-20 17:20:46,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:46,210 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] [2024-06-20 17:20:46,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:20:46,210 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)] === [2024-06-20 17:20:46,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1566931715, now seen corresponding path program 2 times [2024-06-20 17:20:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042858130] [2024-06-20 17:20:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:49,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:49,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042858130] [2024-06-20 17:20:49,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042858130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:49,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:49,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:20:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115232955] [2024-06-20 17:20:49,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:49,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:20:49,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:20:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:20:49,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:49,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 209 transitions, 2488 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) [2024-06-20 17:20:49,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:49,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:49,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:51,662 INFO L124 PetriNetUnfolderBase]: 3499/5626 cut-off events. [2024-06-20 17:20:51,662 INFO L125 PetriNetUnfolderBase]: For 290930/290930 co-relation queries the response was YES. [2024-06-20 17:20:51,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33900 conditions, 5626 events. 3499/5626 cut-off events. For 290930/290930 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33988 event pairs, 1043 based on Foata normal form. 56/5677 useless extension candidates. Maximal degree in co-relation 33813. Up to 4618 conditions per place. [2024-06-20 17:20:51,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 166 selfloop transitions, 68 changer transitions 11/250 dead transitions. [2024-06-20 17:20:51,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 250 transitions, 3170 flow [2024-06-20 17:20:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:20:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:20:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 17:20:51,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:20:51,707 INFO L175 Difference]: Start difference. First operand has 184 places, 209 transitions, 2488 flow. Second operand 10 states and 175 transitions. [2024-06-20 17:20:51,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 250 transitions, 3170 flow [2024-06-20 17:20:52,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 2921 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 17:20:52,012 INFO L231 Difference]: Finished difference. Result has 185 places, 207 transitions, 2386 flow [2024-06-20 17:20:52,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2386, PETRI_PLACES=185, PETRI_TRANSITIONS=207} [2024-06-20 17:20:52,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 17:20:52,018 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 207 transitions, 2386 flow [2024-06-20 17:20:52,018 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) [2024-06-20 17:20:52,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:52,018 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] [2024-06-20 17:20:52,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:20:52,019 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)] === [2024-06-20 17:20:52,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash 299685635, now seen corresponding path program 1 times [2024-06-20 17:20:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106049] [2024-06-20 17:20:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:20:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:20:55,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:20:55,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106049] [2024-06-20 17:20:55,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:20:55,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:20:55,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:20:55,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900933351] [2024-06-20 17:20:55,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:20:55,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:20:55,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:20:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:20:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:20:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:20:55,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 207 transitions, 2386 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) [2024-06-20 17:20:55,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:20:55,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:20:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:20:57,186 INFO L124 PetriNetUnfolderBase]: 3335/5392 cut-off events. [2024-06-20 17:20:57,186 INFO L125 PetriNetUnfolderBase]: For 236861/236861 co-relation queries the response was YES. [2024-06-20 17:20:57,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33000 conditions, 5392 events. 3335/5392 cut-off events. For 236861/236861 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 32622 event pairs, 1162 based on Foata normal form. 2/5393 useless extension candidates. Maximal degree in co-relation 32911. Up to 5012 conditions per place. [2024-06-20 17:20:57,232 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 45 changer transitions 0/248 dead transitions. [2024-06-20 17:20:57,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 248 transitions, 3044 flow [2024-06-20 17:20:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:20:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:20:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:20:57,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 17:20:57,233 INFO L175 Difference]: Start difference. First operand has 185 places, 207 transitions, 2386 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:20:57,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 248 transitions, 3044 flow [2024-06-20 17:20:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 248 transitions, 2831 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-20 17:20:57,488 INFO L231 Difference]: Finished difference. Result has 185 places, 210 transitions, 2326 flow [2024-06-20 17:20:57,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2326, PETRI_PLACES=185, PETRI_TRANSITIONS=210} [2024-06-20 17:20:57,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 17:20:57,489 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 210 transitions, 2326 flow [2024-06-20 17:20:57,489 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) [2024-06-20 17:20:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:20:57,489 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] [2024-06-20 17:20:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:20:57,489 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)] === [2024-06-20 17:20:57,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:20:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash -308823015, now seen corresponding path program 1 times [2024-06-20 17:20:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:20:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286931284] [2024-06-20 17:20:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:20:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:20:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286931284] [2024-06-20 17:21:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286931284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018965679] [2024-06-20 17:21:00,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:00,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:00,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 210 transitions, 2326 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) [2024-06-20 17:21:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:02,582 INFO L124 PetriNetUnfolderBase]: 3350/5413 cut-off events. [2024-06-20 17:21:02,582 INFO L125 PetriNetUnfolderBase]: For 241043/241043 co-relation queries the response was YES. [2024-06-20 17:21:02,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33167 conditions, 5413 events. 3350/5413 cut-off events. For 241043/241043 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32651 event pairs, 1038 based on Foata normal form. 2/5414 useless extension candidates. Maximal degree in co-relation 33078. Up to 4984 conditions per place. [2024-06-20 17:21:02,628 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 41 changer transitions 0/257 dead transitions. [2024-06-20 17:21:02,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 257 transitions, 3170 flow [2024-06-20 17:21:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:02,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:02,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:21:02,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 17:21:02,630 INFO L175 Difference]: Start difference. First operand has 185 places, 210 transitions, 2326 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:21:02,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 257 transitions, 3170 flow [2024-06-20 17:21:02,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 257 transitions, 3003 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:02,932 INFO L231 Difference]: Finished difference. Result has 188 places, 215 transitions, 2362 flow [2024-06-20 17:21:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2362, PETRI_PLACES=188, PETRI_TRANSITIONS=215} [2024-06-20 17:21:02,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-20 17:21:02,933 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 215 transitions, 2362 flow [2024-06-20 17:21:02,933 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) [2024-06-20 17:21:02,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:02,933 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] [2024-06-20 17:21:02,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:21:02,933 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)] === [2024-06-20 17:21:02,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash -301204455, now seen corresponding path program 2 times [2024-06-20 17:21:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262729809] [2024-06-20 17:21:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:06,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:06,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262729809] [2024-06-20 17:21:06,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262729809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:06,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:06,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:06,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005723168] [2024-06-20 17:21:06,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:06,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:06,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:06,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 215 transitions, 2362 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) [2024-06-20 17:21:06,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:06,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:06,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:08,606 INFO L124 PetriNetUnfolderBase]: 3361/5430 cut-off events. [2024-06-20 17:21:08,607 INFO L125 PetriNetUnfolderBase]: For 250803/250803 co-relation queries the response was YES. [2024-06-20 17:21:08,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33521 conditions, 5430 events. 3361/5430 cut-off events. For 250803/250803 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32800 event pairs, 1188 based on Foata normal form. 2/5431 useless extension candidates. Maximal degree in co-relation 33432. Up to 5131 conditions per place. [2024-06-20 17:21:08,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 37 changer transitions 0/251 dead transitions. [2024-06-20 17:21:08,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 251 transitions, 3031 flow [2024-06-20 17:21:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:21:08,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 17:21:08,658 INFO L175 Difference]: Start difference. First operand has 188 places, 215 transitions, 2362 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:21:08,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 251 transitions, 3031 flow [2024-06-20 17:21:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 251 transitions, 2894 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:09,092 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2383 flow [2024-06-20 17:21:09,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2383, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-20 17:21:09,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 17:21:09,093 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2383 flow [2024-06-20 17:21:09,093 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) [2024-06-20 17:21:09,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:09,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:21:09,093 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)] === [2024-06-20 17:21:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -25032775, now seen corresponding path program 2 times [2024-06-20 17:21:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092230589] [2024-06-20 17:21:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092230589] [2024-06-20 17:21:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092230589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:12,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:12,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408111347] [2024-06-20 17:21:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:12,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:12,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:12,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2383 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) [2024-06-20 17:21:12,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:12,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:12,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:14,039 INFO L124 PetriNetUnfolderBase]: 3451/5578 cut-off events. [2024-06-20 17:21:14,040 INFO L125 PetriNetUnfolderBase]: For 272667/272669 co-relation queries the response was YES. [2024-06-20 17:21:14,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34860 conditions, 5578 events. 3451/5578 cut-off events. For 272667/272669 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 33906 event pairs, 920 based on Foata normal form. 4/5581 useless extension candidates. Maximal degree in co-relation 34770. Up to 4503 conditions per place. [2024-06-20 17:21:14,091 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 109 changer transitions 0/274 dead transitions. [2024-06-20 17:21:14,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 274 transitions, 3577 flow [2024-06-20 17:21:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 17:21:14,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-20 17:21:14,093 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2383 flow. Second operand 8 states and 161 transitions. [2024-06-20 17:21:14,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 274 transitions, 3577 flow [2024-06-20 17:21:14,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 274 transitions, 3490 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:14,411 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2752 flow [2024-06-20 17:21:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2752, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-20 17:21:14,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 17:21:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2752 flow [2024-06-20 17:21:14,411 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) [2024-06-20 17:21:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:14,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:21:14,412 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)] === [2024-06-20 17:21:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -15509575, now seen corresponding path program 3 times [2024-06-20 17:21:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299428182] [2024-06-20 17:21:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299428182] [2024-06-20 17:21:17,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299428182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:17,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:17,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130237452] [2024-06-20 17:21:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:17,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:17,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2752 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) [2024-06-20 17:21:17,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:17,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:19,470 INFO L124 PetriNetUnfolderBase]: 3461/5590 cut-off events. [2024-06-20 17:21:19,470 INFO L125 PetriNetUnfolderBase]: For 287428/287430 co-relation queries the response was YES. [2024-06-20 17:21:19,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36225 conditions, 5590 events. 3461/5590 cut-off events. For 287428/287430 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34054 event pairs, 925 based on Foata normal form. 4/5593 useless extension candidates. Maximal degree in co-relation 36134. Up to 4509 conditions per place. [2024-06-20 17:21:19,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 110 changer transitions 0/272 dead transitions. [2024-06-20 17:21:19,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 272 transitions, 3768 flow [2024-06-20 17:21:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:21:19,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 17:21:19,527 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2752 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:21:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 272 transitions, 3768 flow [2024-06-20 17:21:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 272 transitions, 3591 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-20 17:21:19,887 INFO L231 Difference]: Finished difference. Result has 200 places, 236 transitions, 2865 flow [2024-06-20 17:21:19,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=200, PETRI_TRANSITIONS=236} [2024-06-20 17:21:19,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-20 17:21:19,888 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 236 transitions, 2865 flow [2024-06-20 17:21:19,888 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) [2024-06-20 17:21:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:19,889 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] [2024-06-20 17:21:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:21:19,889 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)] === [2024-06-20 17:21:19,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash 265420729, now seen corresponding path program 4 times [2024-06-20 17:21:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376498938] [2024-06-20 17:21:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:19,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:23,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376498938] [2024-06-20 17:21:23,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376498938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:23,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:23,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120921] [2024-06-20 17:21:23,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:23,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:23,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 236 transitions, 2865 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) [2024-06-20 17:21:23,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:23,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:23,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:24,791 INFO L124 PetriNetUnfolderBase]: 3471/5604 cut-off events. [2024-06-20 17:21:24,791 INFO L125 PetriNetUnfolderBase]: For 297377/297377 co-relation queries the response was YES. [2024-06-20 17:21:24,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36679 conditions, 5604 events. 3471/5604 cut-off events. For 297377/297377 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 34156 event pairs, 1163 based on Foata normal form. 2/5605 useless extension candidates. Maximal degree in co-relation 36585. Up to 5257 conditions per place. [2024-06-20 17:21:24,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 43 changer transitions 0/265 dead transitions. [2024-06-20 17:21:24,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 265 transitions, 3513 flow [2024-06-20 17:21:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:21:24,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:21:24,846 INFO L175 Difference]: Start difference. First operand has 200 places, 236 transitions, 2865 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:21:24,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 265 transitions, 3513 flow [2024-06-20 17:21:25,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 265 transitions, 3314 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:25,293 INFO L231 Difference]: Finished difference. Result has 203 places, 239 transitions, 2805 flow [2024-06-20 17:21:25,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2805, PETRI_PLACES=203, PETRI_TRANSITIONS=239} [2024-06-20 17:21:25,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 17:21:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 239 transitions, 2805 flow [2024-06-20 17:21:25,293 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) [2024-06-20 17:21:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:25,294 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] [2024-06-20 17:21:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:21:25,294 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)] === [2024-06-20 17:21:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash 436805397, now seen corresponding path program 3 times [2024-06-20 17:21:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694948429] [2024-06-20 17:21:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694948429] [2024-06-20 17:21:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694948429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:28,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:28,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:28,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53410958] [2024-06-20 17:21:28,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:28,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:28,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:28,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 239 transitions, 2805 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) [2024-06-20 17:21:28,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:28,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:28,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:30,190 INFO L124 PetriNetUnfolderBase]: 3466/5585 cut-off events. [2024-06-20 17:21:30,190 INFO L125 PetriNetUnfolderBase]: For 303794/303794 co-relation queries the response was YES. [2024-06-20 17:21:30,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36333 conditions, 5585 events. 3466/5585 cut-off events. For 303794/303794 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 33997 event pairs, 1168 based on Foata normal form. 2/5586 useless extension candidates. Maximal degree in co-relation 36238. Up to 5276 conditions per place. [2024-06-20 17:21:30,239 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 36 changer transitions 0/264 dead transitions. [2024-06-20 17:21:30,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 3409 flow [2024-06-20 17:21:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:21:30,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-20 17:21:30,241 INFO L175 Difference]: Start difference. First operand has 203 places, 239 transitions, 2805 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:21:30,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 3409 flow [2024-06-20 17:21:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 264 transitions, 3298 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:30,611 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 2794 flow [2024-06-20 17:21:30,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2794, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-20 17:21:30,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 17:21:30,611 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 2794 flow [2024-06-20 17:21:30,611 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) [2024-06-20 17:21:30,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:30,611 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] [2024-06-20 17:21:30,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:21:30,612 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)] === [2024-06-20 17:21:30,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash 157789653, now seen corresponding path program 1 times [2024-06-20 17:21:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:30,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85323761] [2024-06-20 17:21:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:33,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85323761] [2024-06-20 17:21:33,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85323761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:33,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:33,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396486423] [2024-06-20 17:21:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:33,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:33,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:33,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:33,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 2794 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) [2024-06-20 17:21:33,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:33,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:33,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:35,590 INFO L124 PetriNetUnfolderBase]: 3572/5767 cut-off events. [2024-06-20 17:21:35,590 INFO L125 PetriNetUnfolderBase]: For 340369/340371 co-relation queries the response was YES. [2024-06-20 17:21:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38365 conditions, 5767 events. 3572/5767 cut-off events. For 340369/340371 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35367 event pairs, 1105 based on Foata normal form. 4/5770 useless extension candidates. Maximal degree in co-relation 38268. Up to 4955 conditions per place. [2024-06-20 17:21:35,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 89 changer transitions 0/289 dead transitions. [2024-06-20 17:21:35,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 289 transitions, 3721 flow [2024-06-20 17:21:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 17:21:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 17:21:35,639 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 2794 flow. Second operand 8 states and 157 transitions. [2024-06-20 17:21:35,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 289 transitions, 3721 flow [2024-06-20 17:21:35,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 289 transitions, 3636 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:35,992 INFO L231 Difference]: Finished difference. Result has 210 places, 246 transitions, 3013 flow [2024-06-20 17:21:35,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=210, PETRI_TRANSITIONS=246} [2024-06-20 17:21:35,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 17:21:35,992 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 246 transitions, 3013 flow [2024-06-20 17:21:35,992 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) [2024-06-20 17:21:35,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:35,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:21:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:21:35,993 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)] === [2024-06-20 17:21:35,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -704702737, now seen corresponding path program 2 times [2024-06-20 17:21:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:35,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976313440] [2024-06-20 17:21:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:35,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:39,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976313440] [2024-06-20 17:21:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976313440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:39,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210115192] [2024-06-20 17:21:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:39,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:39,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:39,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 246 transitions, 3013 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) [2024-06-20 17:21:39,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:39,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:39,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:41,279 INFO L124 PetriNetUnfolderBase]: 3567/5766 cut-off events. [2024-06-20 17:21:41,279 INFO L125 PetriNetUnfolderBase]: For 350451/350453 co-relation queries the response was YES. [2024-06-20 17:21:41,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39005 conditions, 5766 events. 3567/5766 cut-off events. For 350451/350453 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35369 event pairs, 1110 based on Foata normal form. 4/5769 useless extension candidates. Maximal degree in co-relation 38906. Up to 5084 conditions per place. [2024-06-20 17:21:41,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-20 17:21:41,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 3663 flow [2024-06-20 17:21:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:21:41,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:21:41,330 INFO L175 Difference]: Start difference. First operand has 210 places, 246 transitions, 3013 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:21:41,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 3663 flow [2024-06-20 17:21:41,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 279 transitions, 3486 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:21:41,691 INFO L231 Difference]: Finished difference. Result has 213 places, 246 transitions, 3013 flow [2024-06-20 17:21:41,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=213, PETRI_TRANSITIONS=246} [2024-06-20 17:21:41,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 17:21:41,691 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 246 transitions, 3013 flow [2024-06-20 17:21:41,691 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) [2024-06-20 17:21:41,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:41,692 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] [2024-06-20 17:21:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:21:41,692 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)] === [2024-06-20 17:21:41,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 265427673, now seen corresponding path program 3 times [2024-06-20 17:21:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404853183] [2024-06-20 17:21:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:45,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:45,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404853183] [2024-06-20 17:21:45,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404853183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:45,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:45,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:21:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332646027] [2024-06-20 17:21:45,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:21:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:21:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:21:45,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:45,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 246 transitions, 3013 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) [2024-06-20 17:21:45,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:45,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:45,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:46,902 INFO L124 PetriNetUnfolderBase]: 3611/5802 cut-off events. [2024-06-20 17:21:46,902 INFO L125 PetriNetUnfolderBase]: For 378704/378704 co-relation queries the response was YES. [2024-06-20 17:21:46,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39532 conditions, 5802 events. 3611/5802 cut-off events. For 378704/378704 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 35438 event pairs, 1173 based on Foata normal form. 12/5813 useless extension candidates. Maximal degree in co-relation 39432. Up to 5431 conditions per place. [2024-06-20 17:21:46,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 226 selfloop transitions, 38 changer transitions 9/278 dead transitions. [2024-06-20 17:21:46,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 278 transitions, 3731 flow [2024-06-20 17:21:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:21:46,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:21:46,952 INFO L175 Difference]: Start difference. First operand has 213 places, 246 transitions, 3013 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:21:46,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 278 transitions, 3731 flow [2024-06-20 17:21:47,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 278 transitions, 3548 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:47,246 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2903 flow [2024-06-20 17:21:47,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2903, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-20 17:21:47,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-20 17:21:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2903 flow [2024-06-20 17:21:47,247 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) [2024-06-20 17:21:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:47,247 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] [2024-06-20 17:21:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:21:47,248 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)] === [2024-06-20 17:21:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2010181217, now seen corresponding path program 5 times [2024-06-20 17:21:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654330583] [2024-06-20 17:21:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654330583] [2024-06-20 17:21:50,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654330583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:50,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:50,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:50,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242824853] [2024-06-20 17:21:50,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:50,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:50,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:50,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:50,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:50,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2903 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) [2024-06-20 17:21:50,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:50,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:52,558 INFO L124 PetriNetUnfolderBase]: 3575/5756 cut-off events. [2024-06-20 17:21:52,558 INFO L125 PetriNetUnfolderBase]: For 372899/372899 co-relation queries the response was YES. [2024-06-20 17:21:52,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39195 conditions, 5756 events. 3575/5756 cut-off events. For 372899/372899 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35063 event pairs, 943 based on Foata normal form. 2/5753 useless extension candidates. Maximal degree in co-relation 39094. Up to 4671 conditions per place. [2024-06-20 17:21:52,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 97 changer transitions 0/283 dead transitions. [2024-06-20 17:21:52,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 283 transitions, 3853 flow [2024-06-20 17:21:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 17:21:52,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-20 17:21:52,618 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2903 flow. Second operand 8 states and 153 transitions. [2024-06-20 17:21:52,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 283 transitions, 3853 flow [2024-06-20 17:21:53,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 283 transitions, 3759 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:21:53,058 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 3059 flow [2024-06-20 17:21:53,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3059, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2024-06-20 17:21:53,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 17:21:53,058 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 3059 flow [2024-06-20 17:21:53,059 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) [2024-06-20 17:21:53,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:53,059 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] [2024-06-20 17:21:53,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:21:53,059 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)] === [2024-06-20 17:21:53,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash -498225129, now seen corresponding path program 6 times [2024-06-20 17:21:53,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:53,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278602038] [2024-06-20 17:21:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:21:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:21:56,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:21:56,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278602038] [2024-06-20 17:21:56,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278602038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:21:56,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:21:56,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:21:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914172822] [2024-06-20 17:21:56,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:21:56,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:21:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:21:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:21:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:21:56,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:21:56,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 3059 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) [2024-06-20 17:21:56,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:21:56,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:21:56,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:21:58,293 INFO L124 PetriNetUnfolderBase]: 3585/5774 cut-off events. [2024-06-20 17:21:58,293 INFO L125 PetriNetUnfolderBase]: For 386213/386213 co-relation queries the response was YES. [2024-06-20 17:21:58,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39890 conditions, 5774 events. 3585/5774 cut-off events. For 386213/386213 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35190 event pairs, 941 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 39788. Up to 4677 conditions per place. [2024-06-20 17:21:58,349 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 97 changer transitions 0/282 dead transitions. [2024-06-20 17:21:58,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 282 transitions, 4007 flow [2024-06-20 17:21:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:21:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:21:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:21:58,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 17:21:58,351 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 3059 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:21:58,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 282 transitions, 4007 flow [2024-06-20 17:21:58,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 282 transitions, 3710 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 17:21:58,742 INFO L231 Difference]: Finished difference. Result has 218 places, 250 transitions, 3019 flow [2024-06-20 17:21:58,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3019, PETRI_PLACES=218, PETRI_TRANSITIONS=250} [2024-06-20 17:21:58,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-20 17:21:58,743 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 250 transitions, 3019 flow [2024-06-20 17:21:58,743 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) [2024-06-20 17:21:58,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:21:58,743 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] [2024-06-20 17:21:58,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:21:58,743 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)] === [2024-06-20 17:21:58,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:21:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1893994519, now seen corresponding path program 7 times [2024-06-20 17:21:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:21:58,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431981710] [2024-06-20 17:21:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:21:58,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:21:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:01,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:01,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431981710] [2024-06-20 17:22:01,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431981710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:01,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:01,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577533152] [2024-06-20 17:22:01,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:02,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:02,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 250 transitions, 3019 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) [2024-06-20 17:22:02,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:02,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:02,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:03,989 INFO L124 PetriNetUnfolderBase]: 3647/5860 cut-off events. [2024-06-20 17:22:03,990 INFO L125 PetriNetUnfolderBase]: For 413206/413206 co-relation queries the response was YES. [2024-06-20 17:22:04,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40478 conditions, 5860 events. 3647/5860 cut-off events. For 413206/413206 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35805 event pairs, 960 based on Foata normal form. 6/5861 useless extension candidates. Maximal degree in co-relation 40377. Up to 4723 conditions per place. [2024-06-20 17:22:04,054 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 99 changer transitions 0/286 dead transitions. [2024-06-20 17:22:04,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 4003 flow [2024-06-20 17:22:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:22:04,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:22:04,056 INFO L175 Difference]: Start difference. First operand has 218 places, 250 transitions, 3019 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:22:04,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 4003 flow [2024-06-20 17:22:04,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 286 transitions, 3804 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:04,524 INFO L231 Difference]: Finished difference. Result has 221 places, 257 transitions, 3125 flow [2024-06-20 17:22:04,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3125, PETRI_PLACES=221, PETRI_TRANSITIONS=257} [2024-06-20 17:22:04,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 17:22:04,525 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 257 transitions, 3125 flow [2024-06-20 17:22:04,525 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) [2024-06-20 17:22:04,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:04,525 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] [2024-06-20 17:22:04,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:22:04,525 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)] === [2024-06-20 17:22:04,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1712751717, now seen corresponding path program 8 times [2024-06-20 17:22:04,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:04,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035713564] [2024-06-20 17:22:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:04,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:07,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035713564] [2024-06-20 17:22:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035713564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742769549] [2024-06-20 17:22:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:07,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:07,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:07,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 257 transitions, 3125 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) [2024-06-20 17:22:07,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:07,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:07,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:09,450 INFO L124 PetriNetUnfolderBase]: 3629/5836 cut-off events. [2024-06-20 17:22:09,450 INFO L125 PetriNetUnfolderBase]: For 416250/416250 co-relation queries the response was YES. [2024-06-20 17:22:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40221 conditions, 5836 events. 3629/5836 cut-off events. For 416250/416250 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35732 event pairs, 1140 based on Foata normal form. 6/5837 useless extension candidates. Maximal degree in co-relation 40119. Up to 5218 conditions per place. [2024-06-20 17:22:09,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 56 changer transitions 0/279 dead transitions. [2024-06-20 17:22:09,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 279 transitions, 3857 flow [2024-06-20 17:22:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:22:09,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 17:22:09,504 INFO L175 Difference]: Start difference. First operand has 221 places, 257 transitions, 3125 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:22:09,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 279 transitions, 3857 flow [2024-06-20 17:22:10,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 279 transitions, 3703 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:10,025 INFO L231 Difference]: Finished difference. Result has 225 places, 257 transitions, 3090 flow [2024-06-20 17:22:10,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2971, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3090, PETRI_PLACES=225, PETRI_TRANSITIONS=257} [2024-06-20 17:22:10,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 17:22:10,025 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 257 transitions, 3090 flow [2024-06-20 17:22:10,026 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) [2024-06-20 17:22:10,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:10,026 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] [2024-06-20 17:22:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:22:10,026 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)] === [2024-06-20 17:22:10,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1380999097, now seen corresponding path program 9 times [2024-06-20 17:22:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:10,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233342497] [2024-06-20 17:22:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:13,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:13,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233342497] [2024-06-20 17:22:13,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233342497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:13,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:13,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259601735] [2024-06-20 17:22:13,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:13,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:13,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:13,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 257 transitions, 3090 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) [2024-06-20 17:22:13,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:13,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:13,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:15,328 INFO L124 PetriNetUnfolderBase]: 3611/5816 cut-off events. [2024-06-20 17:22:15,328 INFO L125 PetriNetUnfolderBase]: For 417157/417157 co-relation queries the response was YES. [2024-06-20 17:22:15,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39631 conditions, 5816 events. 3611/5816 cut-off events. For 417157/417157 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35657 event pairs, 1127 based on Foata normal form. 6/5817 useless extension candidates. Maximal degree in co-relation 39528. Up to 5207 conditions per place. [2024-06-20 17:22:15,388 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 61 changer transitions 0/284 dead transitions. [2024-06-20 17:22:15,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 284 transitions, 3844 flow [2024-06-20 17:22:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:22:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:22:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-20 17:22:15,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-20 17:22:15,390 INFO L175 Difference]: Start difference. First operand has 225 places, 257 transitions, 3090 flow. Second operand 10 states and 169 transitions. [2024-06-20 17:22:15,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 284 transitions, 3844 flow [2024-06-20 17:22:15,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 284 transitions, 3630 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 17:22:15,952 INFO L231 Difference]: Finished difference. Result has 227 places, 257 transitions, 3005 flow [2024-06-20 17:22:15,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3005, PETRI_PLACES=227, PETRI_TRANSITIONS=257} [2024-06-20 17:22:15,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 17:22:15,953 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 257 transitions, 3005 flow [2024-06-20 17:22:15,953 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) [2024-06-20 17:22:15,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:15,953 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] [2024-06-20 17:22:15,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:22:15,953 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)] === [2024-06-20 17:22:15,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -501075145, now seen corresponding path program 4 times [2024-06-20 17:22:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:15,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81237165] [2024-06-20 17:22:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:15,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:18,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:18,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81237165] [2024-06-20 17:22:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81237165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:18,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:18,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133323934] [2024-06-20 17:22:18,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:18,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:18,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:18,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:18,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 257 transitions, 3005 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) [2024-06-20 17:22:18,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:18,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:18,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:21,010 INFO L124 PetriNetUnfolderBase]: 3789/6165 cut-off events. [2024-06-20 17:22:21,010 INFO L125 PetriNetUnfolderBase]: For 477280/477280 co-relation queries the response was YES. [2024-06-20 17:22:21,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43147 conditions, 6165 events. 3789/6165 cut-off events. For 477280/477280 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38544 event pairs, 1149 based on Foata normal form. 2/6164 useless extension candidates. Maximal degree in co-relation 43043. Up to 5208 conditions per place. [2024-06-20 17:22:21,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 80 changer transitions 0/302 dead transitions. [2024-06-20 17:22:21,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 302 transitions, 3976 flow [2024-06-20 17:22:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:22:21,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 17:22:21,183 INFO L175 Difference]: Start difference. First operand has 227 places, 257 transitions, 3005 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:22:21,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 302 transitions, 3976 flow [2024-06-20 17:22:21,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 302 transitions, 3784 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:22:21,843 INFO L231 Difference]: Finished difference. Result has 226 places, 263 transitions, 3111 flow [2024-06-20 17:22:21,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3111, PETRI_PLACES=226, PETRI_TRANSITIONS=263} [2024-06-20 17:22:21,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 17:22:21,844 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 263 transitions, 3111 flow [2024-06-20 17:22:21,844 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) [2024-06-20 17:22:21,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:21,844 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] [2024-06-20 17:22:21,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:22:21,844 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)] === [2024-06-20 17:22:21,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 938441013, now seen corresponding path program 5 times [2024-06-20 17:22:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424464975] [2024-06-20 17:22:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:25,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:25,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424464975] [2024-06-20 17:22:25,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424464975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:25,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:25,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040706710] [2024-06-20 17:22:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:25,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:25,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:25,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:25,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 263 transitions, 3111 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) [2024-06-20 17:22:25,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:25,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:25,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:27,205 INFO L124 PetriNetUnfolderBase]: 3797/6183 cut-off events. [2024-06-20 17:22:27,205 INFO L125 PetriNetUnfolderBase]: For 491797/491797 co-relation queries the response was YES. [2024-06-20 17:22:27,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43851 conditions, 6183 events. 3797/6183 cut-off events. For 491797/491797 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38763 event pairs, 1157 based on Foata normal form. 2/6182 useless extension candidates. Maximal degree in co-relation 43745. Up to 5428 conditions per place. [2024-06-20 17:22:27,270 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 75 changer transitions 0/294 dead transitions. [2024-06-20 17:22:27,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 294 transitions, 3821 flow [2024-06-20 17:22:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:22:27,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 17:22:27,272 INFO L175 Difference]: Start difference. First operand has 226 places, 263 transitions, 3111 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:22:27,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 294 transitions, 3821 flow [2024-06-20 17:22:28,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 294 transitions, 3640 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:22:28,012 INFO L231 Difference]: Finished difference. Result has 229 places, 265 transitions, 3132 flow [2024-06-20 17:22:28,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3132, PETRI_PLACES=229, PETRI_TRANSITIONS=265} [2024-06-20 17:22:28,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-20 17:22:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 265 transitions, 3132 flow [2024-06-20 17:22:28,013 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) [2024-06-20 17:22:28,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:28,013 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] [2024-06-20 17:22:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:22:28,013 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)] === [2024-06-20 17:22:28,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1352817369, now seen corresponding path program 6 times [2024-06-20 17:22:28,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:28,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439246125] [2024-06-20 17:22:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:30,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439246125] [2024-06-20 17:22:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439246125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865911669] [2024-06-20 17:22:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:30,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:30,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:30,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 265 transitions, 3132 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) [2024-06-20 17:22:30,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:30,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:30,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:32,869 INFO L124 PetriNetUnfolderBase]: 3805/6209 cut-off events. [2024-06-20 17:22:32,869 INFO L125 PetriNetUnfolderBase]: For 506701/506701 co-relation queries the response was YES. [2024-06-20 17:22:32,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 6209 events. 3805/6209 cut-off events. For 506701/506701 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38874 event pairs, 1034 based on Foata normal form. 2/6208 useless extension candidates. Maximal degree in co-relation 43889. Up to 4078 conditions per place. [2024-06-20 17:22:32,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 98 changer transitions 0/312 dead transitions. [2024-06-20 17:22:32,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 312 transitions, 4241 flow [2024-06-20 17:22:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:22:32,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 17:22:32,941 INFO L175 Difference]: Start difference. First operand has 229 places, 265 transitions, 3132 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:22:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 312 transitions, 4241 flow [2024-06-20 17:22:33,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 312 transitions, 4077 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:33,800 INFO L231 Difference]: Finished difference. Result has 232 places, 268 transitions, 3242 flow [2024-06-20 17:22:33,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3242, PETRI_PLACES=232, PETRI_TRANSITIONS=268} [2024-06-20 17:22:33,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 17:22:33,800 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 268 transitions, 3242 flow [2024-06-20 17:22:33,800 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) [2024-06-20 17:22:33,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:33,801 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] [2024-06-20 17:22:33,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:22:33,801 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)] === [2024-06-20 17:22:33,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1364245209, now seen corresponding path program 7 times [2024-06-20 17:22:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:33,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580462416] [2024-06-20 17:22:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580462416] [2024-06-20 17:22:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580462416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:37,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489090004] [2024-06-20 17:22:37,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:37,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:37,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:37,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:37,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:37,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 268 transitions, 3242 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) [2024-06-20 17:22:37,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:37,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:39,142 INFO L124 PetriNetUnfolderBase]: 3772/6132 cut-off events. [2024-06-20 17:22:39,142 INFO L125 PetriNetUnfolderBase]: For 521790/521790 co-relation queries the response was YES. [2024-06-20 17:22:39,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43956 conditions, 6132 events. 3772/6132 cut-off events. For 521790/521790 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38199 event pairs, 1080 based on Foata normal form. 10/6139 useless extension candidates. Maximal degree in co-relation 43847. Up to 4060 conditions per place. [2024-06-20 17:22:39,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 90 changer transitions 0/308 dead transitions. [2024-06-20 17:22:39,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 308 transitions, 4136 flow [2024-06-20 17:22:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 17:22:39,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 17:22:39,210 INFO L175 Difference]: Start difference. First operand has 232 places, 268 transitions, 3242 flow. Second operand 8 states and 151 transitions. [2024-06-20 17:22:39,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 308 transitions, 4136 flow [2024-06-20 17:22:39,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 308 transitions, 3964 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 17:22:39,845 INFO L231 Difference]: Finished difference. Result has 236 places, 268 transitions, 3256 flow [2024-06-20 17:22:39,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3256, PETRI_PLACES=236, PETRI_TRANSITIONS=268} [2024-06-20 17:22:39,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 17:22:39,846 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 268 transitions, 3256 flow [2024-06-20 17:22:39,846 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) [2024-06-20 17:22:39,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:39,846 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] [2024-06-20 17:22:39,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:22:39,846 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)] === [2024-06-20 17:22:39,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1422040989, now seen corresponding path program 8 times [2024-06-20 17:22:39,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:39,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930270313] [2024-06-20 17:22:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:39,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930270313] [2024-06-20 17:22:43,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930270313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:43,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:43,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:43,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001004583] [2024-06-20 17:22:43,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:43,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:43,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:43,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 268 transitions, 3256 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) [2024-06-20 17:22:43,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:43,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:43,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:45,392 INFO L124 PetriNetUnfolderBase]: 3739/6091 cut-off events. [2024-06-20 17:22:45,392 INFO L125 PetriNetUnfolderBase]: For 511724/511724 co-relation queries the response was YES. [2024-06-20 17:22:45,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42819 conditions, 6091 events. 3739/6091 cut-off events. For 511724/511724 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38118 event pairs, 1135 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 42709. Up to 5292 conditions per place. [2024-06-20 17:22:45,448 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 71 changer transitions 0/299 dead transitions. [2024-06-20 17:22:45,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 3958 flow [2024-06-20 17:22:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:22:45,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:22:45,449 INFO L175 Difference]: Start difference. First operand has 236 places, 268 transitions, 3256 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:22:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 3958 flow [2024-06-20 17:22:45,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 299 transitions, 3760 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:45,960 INFO L231 Difference]: Finished difference. Result has 237 places, 268 transitions, 3206 flow [2024-06-20 17:22:45,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3206, PETRI_PLACES=237, PETRI_TRANSITIONS=268} [2024-06-20 17:22:45,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 17:22:45,961 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 268 transitions, 3206 flow [2024-06-20 17:22:45,961 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) [2024-06-20 17:22:45,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:45,961 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] [2024-06-20 17:22:45,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:22:45,961 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)] === [2024-06-20 17:22:45,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1422337659, now seen corresponding path program 9 times [2024-06-20 17:22:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146917703] [2024-06-20 17:22:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:49,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146917703] [2024-06-20 17:22:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146917703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:49,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:22:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476582047] [2024-06-20 17:22:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:22:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:22:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:22:49,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:49,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 268 transitions, 3206 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) [2024-06-20 17:22:49,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:49,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:49,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:51,051 INFO L124 PetriNetUnfolderBase]: 3696/6022 cut-off events. [2024-06-20 17:22:51,051 INFO L125 PetriNetUnfolderBase]: For 490279/490279 co-relation queries the response was YES. [2024-06-20 17:22:51,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41324 conditions, 6022 events. 3696/6022 cut-off events. For 490279/490279 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37615 event pairs, 1102 based on Foata normal form. 14/6033 useless extension candidates. Maximal degree in co-relation 41213. Up to 4931 conditions per place. [2024-06-20 17:22:51,116 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 76 changer transitions 0/303 dead transitions. [2024-06-20 17:22:51,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 303 transitions, 3950 flow [2024-06-20 17:22:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:22:51,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:22:51,117 INFO L175 Difference]: Start difference. First operand has 237 places, 268 transitions, 3206 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:22:51,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 303 transitions, 3950 flow [2024-06-20 17:22:51,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 303 transitions, 3786 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:22:51,647 INFO L231 Difference]: Finished difference. Result has 239 places, 268 transitions, 3201 flow [2024-06-20 17:22:51,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3201, PETRI_PLACES=239, PETRI_TRANSITIONS=268} [2024-06-20 17:22:51,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 17:22:51,647 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 268 transitions, 3201 flow [2024-06-20 17:22:51,648 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) [2024-06-20 17:22:51,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:51,648 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] [2024-06-20 17:22:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:22:51,648 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)] === [2024-06-20 17:22:51,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1704470563, now seen corresponding path program 10 times [2024-06-20 17:22:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:51,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664841481] [2024-06-20 17:22:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:22:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:22:55,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:22:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664841481] [2024-06-20 17:22:55,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664841481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:22:55,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:22:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:22:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092813462] [2024-06-20 17:22:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:22:55,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:22:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:22:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:22:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:22:55,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:22:55,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 268 transitions, 3201 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) [2024-06-20 17:22:55,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:22:55,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:22:55,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:22:57,003 INFO L124 PetriNetUnfolderBase]: 3663/5932 cut-off events. [2024-06-20 17:22:57,003 INFO L125 PetriNetUnfolderBase]: For 471523/471523 co-relation queries the response was YES. [2024-06-20 17:22:57,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40112 conditions, 5932 events. 3663/5932 cut-off events. For 471523/471523 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36742 event pairs, 1153 based on Foata normal form. 14/5941 useless extension candidates. Maximal degree in co-relation 40000. Up to 5345 conditions per place. [2024-06-20 17:22:57,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 51 changer transitions 0/293 dead transitions. [2024-06-20 17:22:57,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 293 transitions, 3871 flow [2024-06-20 17:22:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:22:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:22:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:22:57,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 17:22:57,067 INFO L175 Difference]: Start difference. First operand has 239 places, 268 transitions, 3201 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:22:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 293 transitions, 3871 flow [2024-06-20 17:22:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 293 transitions, 3685 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:22:57,780 INFO L231 Difference]: Finished difference. Result has 240 places, 268 transitions, 3123 flow [2024-06-20 17:22:57,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3123, PETRI_PLACES=240, PETRI_TRANSITIONS=268} [2024-06-20 17:22:57,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-20 17:22:57,780 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 268 transitions, 3123 flow [2024-06-20 17:22:57,780 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) [2024-06-20 17:22:57,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:22:57,781 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] [2024-06-20 17:22:57,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:22:57,781 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)] === [2024-06-20 17:22:57,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:22:57,782 INFO L85 PathProgramCache]: Analyzing trace with hash -794101031, now seen corresponding path program 11 times [2024-06-20 17:22:57,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:22:57,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782279579] [2024-06-20 17:22:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:22:57,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:22:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782279579] [2024-06-20 17:23:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782279579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:01,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:01,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:01,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679588568] [2024-06-20 17:23:01,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:01,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:01,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:01,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:01,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 268 transitions, 3123 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) [2024-06-20 17:23:01,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:03,004 INFO L124 PetriNetUnfolderBase]: 3630/5881 cut-off events. [2024-06-20 17:23:03,004 INFO L125 PetriNetUnfolderBase]: For 447501/447501 co-relation queries the response was YES. [2024-06-20 17:23:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38619 conditions, 5881 events. 3630/5881 cut-off events. For 447501/447501 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36264 event pairs, 1050 based on Foata normal form. 14/5890 useless extension candidates. Maximal degree in co-relation 38506. Up to 4022 conditions per place. [2024-06-20 17:23:03,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 57 changer transitions 0/300 dead transitions. [2024-06-20 17:23:03,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 300 transitions, 4001 flow [2024-06-20 17:23:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:23:03,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:23:03,062 INFO L175 Difference]: Start difference. First operand has 240 places, 268 transitions, 3123 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:23:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 300 transitions, 4001 flow [2024-06-20 17:23:03,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 300 transitions, 3869 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:23:03,839 INFO L231 Difference]: Finished difference. Result has 241 places, 268 transitions, 3113 flow [2024-06-20 17:23:03,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3113, PETRI_PLACES=241, PETRI_TRANSITIONS=268} [2024-06-20 17:23:03,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 17:23:03,839 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 268 transitions, 3113 flow [2024-06-20 17:23:03,839 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) [2024-06-20 17:23:03,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:03,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:03,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:23:03,840 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)] === [2024-06-20 17:23:03,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1370103739, now seen corresponding path program 12 times [2024-06-20 17:23:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626371568] [2024-06-20 17:23:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:03,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:07,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626371568] [2024-06-20 17:23:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626371568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:07,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:23:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928723438] [2024-06-20 17:23:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:23:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:23:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:23:07,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:07,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 3113 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) [2024-06-20 17:23:07,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:07,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:07,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:09,395 INFO L124 PetriNetUnfolderBase]: 3430/5573 cut-off events. [2024-06-20 17:23:09,395 INFO L125 PetriNetUnfolderBase]: For 422647/422647 co-relation queries the response was YES. [2024-06-20 17:23:09,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32556 conditions, 5573 events. 3430/5573 cut-off events. For 422647/422647 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34529 event pairs, 964 based on Foata normal form. 68/5636 useless extension candidates. Maximal degree in co-relation 32442. Up to 4696 conditions per place. [2024-06-20 17:23:09,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 51 changer transitions 7/300 dead transitions. [2024-06-20 17:23:09,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 300 transitions, 3825 flow [2024-06-20 17:23:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:23:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:23:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-20 17:23:09,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:23:09,456 INFO L175 Difference]: Start difference. First operand has 241 places, 268 transitions, 3113 flow. Second operand 10 states and 170 transitions. [2024-06-20 17:23:09,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 300 transitions, 3825 flow [2024-06-20 17:23:10,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 300 transitions, 3702 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:10,127 INFO L231 Difference]: Finished difference. Result has 245 places, 263 transitions, 3032 flow [2024-06-20 17:23:10,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2990, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3032, PETRI_PLACES=245, PETRI_TRANSITIONS=263} [2024-06-20 17:23:10,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:23:10,128 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 263 transitions, 3032 flow [2024-06-20 17:23:10,128 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) [2024-06-20 17:23:10,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:10,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:10,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:23:10,128 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)] === [2024-06-20 17:23:10,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1669656310, now seen corresponding path program 1 times [2024-06-20 17:23:10,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:10,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147208697] [2024-06-20 17:23:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:13,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147208697] [2024-06-20 17:23:13,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147208697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:13,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:13,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754421833] [2024-06-20 17:23:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:13,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:13,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:13,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 263 transitions, 3032 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) [2024-06-20 17:23:13,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:13,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:13,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:15,189 INFO L124 PetriNetUnfolderBase]: 3118/5091 cut-off events. [2024-06-20 17:23:15,189 INFO L125 PetriNetUnfolderBase]: For 262090/262090 co-relation queries the response was YES. [2024-06-20 17:23:15,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30171 conditions, 5091 events. 3118/5091 cut-off events. For 262090/262090 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31499 event pairs, 685 based on Foata normal form. 4/5090 useless extension candidates. Maximal degree in co-relation 30056. Up to 4244 conditions per place. [2024-06-20 17:23:15,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 89 changer transitions 0/290 dead transitions. [2024-06-20 17:23:15,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 290 transitions, 3712 flow [2024-06-20 17:23:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:23:15,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 17:23:15,249 INFO L175 Difference]: Start difference. First operand has 245 places, 263 transitions, 3032 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:23:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 290 transitions, 3712 flow [2024-06-20 17:23:15,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 290 transitions, 3354 flow, removed 5 selfloop flow, removed 18 redundant places. [2024-06-20 17:23:15,705 INFO L231 Difference]: Finished difference. Result has 234 places, 266 transitions, 2911 flow [2024-06-20 17:23:15,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2911, PETRI_PLACES=234, PETRI_TRANSITIONS=266} [2024-06-20 17:23:15,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-20 17:23:15,706 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 266 transitions, 2911 flow [2024-06-20 17:23:15,706 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) [2024-06-20 17:23:15,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:15,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:15,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:23:15,706 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)] === [2024-06-20 17:23:15,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2143694172, now seen corresponding path program 1 times [2024-06-20 17:23:15,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:15,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92767691] [2024-06-20 17:23:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:15,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:18,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:18,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92767691] [2024-06-20 17:23:18,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92767691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:18,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:18,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458708263] [2024-06-20 17:23:18,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:18,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:18,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:18,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 266 transitions, 2911 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) [2024-06-20 17:23:18,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:18,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:18,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:20,435 INFO L124 PetriNetUnfolderBase]: 3100/5051 cut-off events. [2024-06-20 17:23:20,435 INFO L125 PetriNetUnfolderBase]: For 252738/252738 co-relation queries the response was YES. [2024-06-20 17:23:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29007 conditions, 5051 events. 3100/5051 cut-off events. For 252738/252738 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31247 event pairs, 759 based on Foata normal form. 8/5054 useless extension candidates. Maximal degree in co-relation 28894. Up to 4356 conditions per place. [2024-06-20 17:23:20,487 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 35 changer transitions 0/296 dead transitions. [2024-06-20 17:23:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 296 transitions, 3769 flow [2024-06-20 17:23:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 17:23:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 17:23:20,489 INFO L175 Difference]: Start difference. First operand has 234 places, 266 transitions, 2911 flow. Second operand 7 states and 125 transitions. [2024-06-20 17:23:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 296 transitions, 3769 flow [2024-06-20 17:23:21,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 296 transitions, 3577 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:21,052 INFO L231 Difference]: Finished difference. Result has 235 places, 266 transitions, 2795 flow [2024-06-20 17:23:21,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2795, PETRI_PLACES=235, PETRI_TRANSITIONS=266} [2024-06-20 17:23:21,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-20 17:23:21,053 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 266 transitions, 2795 flow [2024-06-20 17:23:21,053 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) [2024-06-20 17:23:21,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:21,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:23:21,054 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)] === [2024-06-20 17:23:21,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1804853960, now seen corresponding path program 2 times [2024-06-20 17:23:21,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:21,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178257534] [2024-06-20 17:23:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:21,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178257534] [2024-06-20 17:23:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178257534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:24,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:24,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274490094] [2024-06-20 17:23:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:24,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:24,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:24,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 266 transitions, 2795 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) [2024-06-20 17:23:24,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:24,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:24,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:25,645 INFO L124 PetriNetUnfolderBase]: 3082/5025 cut-off events. [2024-06-20 17:23:25,645 INFO L125 PetriNetUnfolderBase]: For 230432/230432 co-relation queries the response was YES. [2024-06-20 17:23:25,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28025 conditions, 5025 events. 3082/5025 cut-off events. For 230432/230432 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31084 event pairs, 844 based on Foata normal form. 8/5028 useless extension candidates. Maximal degree in co-relation 27912. Up to 4460 conditions per place. [2024-06-20 17:23:25,697 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 35 changer transitions 0/290 dead transitions. [2024-06-20 17:23:25,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 290 transitions, 3475 flow [2024-06-20 17:23:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:23:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:23:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:23:25,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 17:23:25,698 INFO L175 Difference]: Start difference. First operand has 235 places, 266 transitions, 2795 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:23:25,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 290 transitions, 3475 flow [2024-06-20 17:23:26,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 290 transitions, 3364 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:26,393 INFO L231 Difference]: Finished difference. Result has 236 places, 266 transitions, 2760 flow [2024-06-20 17:23:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2760, PETRI_PLACES=236, PETRI_TRANSITIONS=266} [2024-06-20 17:23:26,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 17:23:26,394 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 266 transitions, 2760 flow [2024-06-20 17:23:26,394 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) [2024-06-20 17:23:26,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:26,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:26,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:23:26,394 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)] === [2024-06-20 17:23:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash 670444518, now seen corresponding path program 2 times [2024-06-20 17:23:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947335144] [2024-06-20 17:23:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:30,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947335144] [2024-06-20 17:23:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947335144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:30,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123157198] [2024-06-20 17:23:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:30,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:30,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:30,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 266 transitions, 2760 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) [2024-06-20 17:23:30,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:30,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:30,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:32,096 INFO L124 PetriNetUnfolderBase]: 3102/5071 cut-off events. [2024-06-20 17:23:32,096 INFO L125 PetriNetUnfolderBase]: For 224057/224057 co-relation queries the response was YES. [2024-06-20 17:23:32,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27891 conditions, 5071 events. 3102/5071 cut-off events. For 224057/224057 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31428 event pairs, 703 based on Foata normal form. 4/5070 useless extension candidates. Maximal degree in co-relation 27778. Up to 3888 conditions per place. [2024-06-20 17:23:32,150 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 110 changer transitions 0/300 dead transitions. [2024-06-20 17:23:32,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 300 transitions, 3636 flow [2024-06-20 17:23:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:23:32,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:23:32,151 INFO L175 Difference]: Start difference. First operand has 236 places, 266 transitions, 2760 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:23:32,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 300 transitions, 3636 flow [2024-06-20 17:23:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3548 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:23:32,700 INFO L231 Difference]: Finished difference. Result has 238 places, 269 transitions, 2941 flow [2024-06-20 17:23:32,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=238, PETRI_TRANSITIONS=269} [2024-06-20 17:23:32,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-20 17:23:32,701 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 269 transitions, 2941 flow [2024-06-20 17:23:32,701 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) [2024-06-20 17:23:32,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:32,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:32,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:23:32,701 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)] === [2024-06-20 17:23:32,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash 965663718, now seen corresponding path program 3 times [2024-06-20 17:23:32,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:32,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029971382] [2024-06-20 17:23:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:32,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:35,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029971382] [2024-06-20 17:23:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029971382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:35,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:35,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968833185] [2024-06-20 17:23:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:35,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:35,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 269 transitions, 2941 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) [2024-06-20 17:23:35,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:35,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:35,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:37,889 INFO L124 PetriNetUnfolderBase]: 3122/5085 cut-off events. [2024-06-20 17:23:37,889 INFO L125 PetriNetUnfolderBase]: For 230847/230847 co-relation queries the response was YES. [2024-06-20 17:23:37,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28462 conditions, 5085 events. 3122/5085 cut-off events. For 230847/230847 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31442 event pairs, 703 based on Foata normal form. 4/5084 useless extension candidates. Maximal degree in co-relation 28348. Up to 3904 conditions per place. [2024-06-20 17:23:37,931 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 109 changer transitions 0/301 dead transitions. [2024-06-20 17:23:37,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 301 transitions, 3965 flow [2024-06-20 17:23:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:23:37,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:23:37,932 INFO L175 Difference]: Start difference. First operand has 238 places, 269 transitions, 2941 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:23:37,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 301 transitions, 3965 flow [2024-06-20 17:23:38,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 301 transitions, 3744 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:38,725 INFO L231 Difference]: Finished difference. Result has 241 places, 272 transitions, 2994 flow [2024-06-20 17:23:38,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2994, PETRI_PLACES=241, PETRI_TRANSITIONS=272} [2024-06-20 17:23:38,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 17:23:38,725 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 272 transitions, 2994 flow [2024-06-20 17:23:38,725 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) [2024-06-20 17:23:38,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:38,726 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, 1, 1] [2024-06-20 17:23:38,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:23:38,726 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)] === [2024-06-20 17:23:38,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 966019908, now seen corresponding path program 4 times [2024-06-20 17:23:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184662694] [2024-06-20 17:23:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:38,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:42,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184662694] [2024-06-20 17:23:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184662694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:42,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726848953] [2024-06-20 17:23:42,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:42,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:42,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:42,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 272 transitions, 2994 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) [2024-06-20 17:23:42,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:42,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:42,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:43,866 INFO L124 PetriNetUnfolderBase]: 3110/5073 cut-off events. [2024-06-20 17:23:43,867 INFO L125 PetriNetUnfolderBase]: For 224471/224471 co-relation queries the response was YES. [2024-06-20 17:23:43,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28123 conditions, 5073 events. 3110/5073 cut-off events. For 224471/224471 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31401 event pairs, 699 based on Foata normal form. 4/5072 useless extension candidates. Maximal degree in co-relation 28008. Up to 3896 conditions per place. [2024-06-20 17:23:43,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 114 changer transitions 0/300 dead transitions. [2024-06-20 17:23:43,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 300 transitions, 3818 flow [2024-06-20 17:23:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:23:43,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 17:23:43,918 INFO L175 Difference]: Start difference. First operand has 241 places, 272 transitions, 2994 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:23:43,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 300 transitions, 3818 flow [2024-06-20 17:23:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 300 transitions, 3590 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:23:44,747 INFO L231 Difference]: Finished difference. Result has 244 places, 272 transitions, 3000 flow [2024-06-20 17:23:44,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3000, PETRI_PLACES=244, PETRI_TRANSITIONS=272} [2024-06-20 17:23:44,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 17:23:44,747 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 272 transitions, 3000 flow [2024-06-20 17:23:44,747 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) [2024-06-20 17:23:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:44,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:23:44,748 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)] === [2024-06-20 17:23:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1604251220, now seen corresponding path program 5 times [2024-06-20 17:23:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:44,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257254476] [2024-06-20 17:23:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:47,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:47,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257254476] [2024-06-20 17:23:47,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257254476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:47,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298322849] [2024-06-20 17:23:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:47,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:47,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:47,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:47,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 272 transitions, 3000 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) [2024-06-20 17:23:47,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:47,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:47,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:49,596 INFO L124 PetriNetUnfolderBase]: 3130/5097 cut-off events. [2024-06-20 17:23:49,596 INFO L125 PetriNetUnfolderBase]: For 230424/230424 co-relation queries the response was YES. [2024-06-20 17:23:49,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28290 conditions, 5097 events. 3130/5097 cut-off events. For 230424/230424 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31557 event pairs, 836 based on Foata normal form. 4/5096 useless extension candidates. Maximal degree in co-relation 28174. Up to 4446 conditions per place. [2024-06-20 17:23:49,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-20 17:23:49,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 302 transitions, 3859 flow [2024-06-20 17:23:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:23:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:23:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 17:23:49,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 17:23:49,651 INFO L175 Difference]: Start difference. First operand has 244 places, 272 transitions, 3000 flow. Second operand 10 states and 165 transitions. [2024-06-20 17:23:49,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 302 transitions, 3859 flow [2024-06-20 17:23:50,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 302 transitions, 3489 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 17:23:50,327 INFO L231 Difference]: Finished difference. Result has 245 places, 275 transitions, 2805 flow [2024-06-20 17:23:50,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2805, PETRI_PLACES=245, PETRI_TRANSITIONS=275} [2024-06-20 17:23:50,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:23:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 275 transitions, 2805 flow [2024-06-20 17:23:50,328 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) [2024-06-20 17:23:50,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:50,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:50,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:23:50,328 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)] === [2024-06-20 17:23:50,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2002191084, now seen corresponding path program 6 times [2024-06-20 17:23:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656364616] [2024-06-20 17:23:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:50,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656364616] [2024-06-20 17:23:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656364616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:53,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:53,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379603241] [2024-06-20 17:23:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:53,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:53,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:53,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 275 transitions, 2805 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) [2024-06-20 17:23:53,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:53,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:53,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:23:55,216 INFO L124 PetriNetUnfolderBase]: 3150/5139 cut-off events. [2024-06-20 17:23:55,216 INFO L125 PetriNetUnfolderBase]: For 233309/233309 co-relation queries the response was YES. [2024-06-20 17:23:55,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28061 conditions, 5139 events. 3150/5139 cut-off events. For 233309/233309 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31944 event pairs, 836 based on Foata normal form. 4/5138 useless extension candidates. Maximal degree in co-relation 27944. Up to 4462 conditions per place. [2024-06-20 17:23:55,262 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 61 changer transitions 0/300 dead transitions. [2024-06-20 17:23:55,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 300 transitions, 3649 flow [2024-06-20 17:23:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:23:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:23:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:23:55,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 17:23:55,263 INFO L175 Difference]: Start difference. First operand has 245 places, 275 transitions, 2805 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:23:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 300 transitions, 3649 flow [2024-06-20 17:23:55,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 300 transitions, 3430 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:23:55,843 INFO L231 Difference]: Finished difference. Result has 244 places, 278 transitions, 2752 flow [2024-06-20 17:23:55,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2595, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2752, PETRI_PLACES=244, PETRI_TRANSITIONS=278} [2024-06-20 17:23:55,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 17:23:55,844 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 278 transitions, 2752 flow [2024-06-20 17:23:55,844 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) [2024-06-20 17:23:55,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:23:55,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:23:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:23:55,844 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)] === [2024-06-20 17:23:55,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:23:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1084924740, now seen corresponding path program 7 times [2024-06-20 17:23:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:23:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487732294] [2024-06-20 17:23:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:23:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:23:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:23:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:23:59,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:23:59,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487732294] [2024-06-20 17:23:59,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487732294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:23:59,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:23:59,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:23:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988327621] [2024-06-20 17:23:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:23:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:23:59,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:23:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:23:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:23:59,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:23:59,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 278 transitions, 2752 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) [2024-06-20 17:23:59,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:23:59,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:23:59,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:00,640 INFO L124 PetriNetUnfolderBase]: 3138/5137 cut-off events. [2024-06-20 17:24:00,640 INFO L125 PetriNetUnfolderBase]: For 224884/224884 co-relation queries the response was YES. [2024-06-20 17:24:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27659 conditions, 5137 events. 3138/5137 cut-off events. For 224884/224884 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31984 event pairs, 852 based on Foata normal form. 4/5136 useless extension candidates. Maximal degree in co-relation 27542. Up to 4454 conditions per place. [2024-06-20 17:24:00,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 62 changer transitions 0/299 dead transitions. [2024-06-20 17:24:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 299 transitions, 3400 flow [2024-06-20 17:24:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:24:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:24:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:24:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:24:00,695 INFO L175 Difference]: Start difference. First operand has 244 places, 278 transitions, 2752 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:24:00,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 299 transitions, 3400 flow [2024-06-20 17:24:01,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 299 transitions, 3229 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:01,653 INFO L231 Difference]: Finished difference. Result has 246 places, 278 transitions, 2711 flow [2024-06-20 17:24:01,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2711, PETRI_PLACES=246, PETRI_TRANSITIONS=278} [2024-06-20 17:24:01,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 17:24:01,654 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 278 transitions, 2711 flow [2024-06-20 17:24:01,654 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) [2024-06-20 17:24:01,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:01,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:01,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:24:01,654 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)] === [2024-06-20 17:24:01,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -716916272, now seen corresponding path program 1 times [2024-06-20 17:24:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:01,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669627131] [2024-06-20 17:24:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:01,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:05,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:05,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669627131] [2024-06-20 17:24:05,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669627131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:05,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:05,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:05,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775081796] [2024-06-20 17:24:05,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:05,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:05,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:05,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:05,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 278 transitions, 2711 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:05,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:05,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:05,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:07,084 INFO L124 PetriNetUnfolderBase]: 3318/5421 cut-off events. [2024-06-20 17:24:07,085 INFO L125 PetriNetUnfolderBase]: For 394942/394942 co-relation queries the response was YES. [2024-06-20 17:24:07,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28850 conditions, 5421 events. 3318/5421 cut-off events. For 394942/394942 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33728 event pairs, 844 based on Foata normal form. 56/5472 useless extension candidates. Maximal degree in co-relation 28732. Up to 4420 conditions per place. [2024-06-20 17:24:07,144 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 58 changer transitions 5/320 dead transitions. [2024-06-20 17:24:07,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 320 transitions, 3579 flow [2024-06-20 17:24:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:24:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:24:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-20 17:24:07,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 17:24:07,146 INFO L175 Difference]: Start difference. First operand has 246 places, 278 transitions, 2711 flow. Second operand 10 states and 174 transitions. [2024-06-20 17:24:07,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 320 transitions, 3579 flow [2024-06-20 17:24:08,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 320 transitions, 3419 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:08,151 INFO L231 Difference]: Finished difference. Result has 249 places, 281 transitions, 2744 flow [2024-06-20 17:24:08,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2551, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2744, PETRI_PLACES=249, PETRI_TRANSITIONS=281} [2024-06-20 17:24:08,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-20 17:24:08,152 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 281 transitions, 2744 flow [2024-06-20 17:24:08,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:08,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:08,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:08,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:24:08,152 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)] === [2024-06-20 17:24:08,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:08,153 INFO L85 PathProgramCache]: Analyzing trace with hash 132540880, now seen corresponding path program 2 times [2024-06-20 17:24:08,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:08,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579569714] [2024-06-20 17:24:08,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:08,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579569714] [2024-06-20 17:24:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579569714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:11,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777390526] [2024-06-20 17:24:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:11,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 281 transitions, 2744 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:13,199 INFO L124 PetriNetUnfolderBase]: 3514/5709 cut-off events. [2024-06-20 17:24:13,199 INFO L125 PetriNetUnfolderBase]: For 379448/379448 co-relation queries the response was YES. [2024-06-20 17:24:13,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33528 conditions, 5709 events. 3514/5709 cut-off events. For 379448/379448 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35223 event pairs, 832 based on Foata normal form. 8/5712 useless extension candidates. Maximal degree in co-relation 33408. Up to 3780 conditions per place. [2024-06-20 17:24:13,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-20 17:24:13,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 322 transitions, 3770 flow [2024-06-20 17:24:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:24:13,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:24:13,250 INFO L175 Difference]: Start difference. First operand has 249 places, 281 transitions, 2744 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:24:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 322 transitions, 3770 flow [2024-06-20 17:24:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 322 transitions, 3668 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:24:14,258 INFO L231 Difference]: Finished difference. Result has 253 places, 284 transitions, 2849 flow [2024-06-20 17:24:14,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2849, PETRI_PLACES=253, PETRI_TRANSITIONS=284} [2024-06-20 17:24:14,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 17:24:14,259 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 284 transitions, 2849 flow [2024-06-20 17:24:14,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:14,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:14,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:24:14,259 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)] === [2024-06-20 17:24:14,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1277018252, now seen corresponding path program 3 times [2024-06-20 17:24:14,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114035468] [2024-06-20 17:24:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:17,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:17,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114035468] [2024-06-20 17:24:17,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114035468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:17,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:17,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:17,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819956954] [2024-06-20 17:24:17,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:17,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:17,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:17,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 284 transitions, 2849 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:17,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:17,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:17,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:19,208 INFO L124 PetriNetUnfolderBase]: 3496/5697 cut-off events. [2024-06-20 17:24:19,208 INFO L125 PetriNetUnfolderBase]: For 364332/364332 co-relation queries the response was YES. [2024-06-20 17:24:19,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33315 conditions, 5697 events. 3496/5697 cut-off events. For 364332/364332 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35384 event pairs, 1018 based on Foata normal form. 8/5700 useless extension candidates. Maximal degree in co-relation 33192. Up to 3772 conditions per place. [2024-06-20 17:24:19,262 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 62 changer transitions 0/321 dead transitions. [2024-06-20 17:24:19,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 321 transitions, 3829 flow [2024-06-20 17:24:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:24:19,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-20 17:24:19,263 INFO L175 Difference]: Start difference. First operand has 253 places, 284 transitions, 2849 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:24:19,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 321 transitions, 3829 flow [2024-06-20 17:24:19,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 321 transitions, 3729 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:19,976 INFO L231 Difference]: Finished difference. Result has 257 places, 284 transitions, 2877 flow [2024-06-20 17:24:19,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2749, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2877, PETRI_PLACES=257, PETRI_TRANSITIONS=284} [2024-06-20 17:24:19,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-20 17:24:19,977 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 284 transitions, 2877 flow [2024-06-20 17:24:19,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:24:19,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:19,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:19,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:24:19,977 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)] === [2024-06-20 17:24:19,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:19,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1960140792, now seen corresponding path program 1 times [2024-06-20 17:24:19,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:19,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908763586] [2024-06-20 17:24:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:23,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:23,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908763586] [2024-06-20 17:24:23,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908763586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:23,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:23,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:23,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359737697] [2024-06-20 17:24:23,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:23,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:23,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:23,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:23,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 284 transitions, 2877 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) [2024-06-20 17:24:23,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:23,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:23,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:25,279 INFO L124 PetriNetUnfolderBase]: 3629/5950 cut-off events. [2024-06-20 17:24:25,279 INFO L125 PetriNetUnfolderBase]: For 437293/437293 co-relation queries the response was YES. [2024-06-20 17:24:25,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36374 conditions, 5950 events. 3629/5950 cut-off events. For 437293/437293 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 37649 event pairs, 840 based on Foata normal form. 8/5957 useless extension candidates. Maximal degree in co-relation 36250. Up to 4340 conditions per place. [2024-06-20 17:24:25,344 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 53 changer transitions 7/354 dead transitions. [2024-06-20 17:24:25,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 354 transitions, 4259 flow [2024-06-20 17:24:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:24:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:24:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-20 17:24:25,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-20 17:24:25,345 INFO L175 Difference]: Start difference. First operand has 257 places, 284 transitions, 2877 flow. Second operand 10 states and 198 transitions. [2024-06-20 17:24:25,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 354 transitions, 4259 flow [2024-06-20 17:24:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 354 transitions, 4058 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:24:26,328 INFO L231 Difference]: Finished difference. Result has 258 places, 287 transitions, 2861 flow [2024-06-20 17:24:26,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2861, PETRI_PLACES=258, PETRI_TRANSITIONS=287} [2024-06-20 17:24:26,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 17:24:26,329 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 287 transitions, 2861 flow [2024-06-20 17:24:26,329 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) [2024-06-20 17:24:26,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:26,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:24:26,329 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)] === [2024-06-20 17:24:26,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash 172972752, now seen corresponding path program 2 times [2024-06-20 17:24:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:26,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139357549] [2024-06-20 17:24:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:29,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139357549] [2024-06-20 17:24:29,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139357549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:29,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:29,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:29,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762166130] [2024-06-20 17:24:29,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:29,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:29,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:29,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:29,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 287 transitions, 2861 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) [2024-06-20 17:24:29,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:29,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:31,841 INFO L124 PetriNetUnfolderBase]: 3451/5672 cut-off events. [2024-06-20 17:24:31,841 INFO L125 PetriNetUnfolderBase]: For 303631/303631 co-relation queries the response was YES. [2024-06-20 17:24:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31483 conditions, 5672 events. 3451/5672 cut-off events. For 303631/303631 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35948 event pairs, 925 based on Foata normal form. 8/5679 useless extension candidates. Maximal degree in co-relation 31360. Up to 5075 conditions per place. [2024-06-20 17:24:31,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 43 changer transitions 4/333 dead transitions. [2024-06-20 17:24:31,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 333 transitions, 3705 flow [2024-06-20 17:24:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:24:31,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 17:24:31,894 INFO L175 Difference]: Start difference. First operand has 258 places, 287 transitions, 2861 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:24:31,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 333 transitions, 3705 flow [2024-06-20 17:24:33,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 333 transitions, 3608 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:24:33,157 INFO L231 Difference]: Finished difference. Result has 262 places, 288 transitions, 2882 flow [2024-06-20 17:24:33,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2882, PETRI_PLACES=262, PETRI_TRANSITIONS=288} [2024-06-20 17:24:33,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 17:24:33,158 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 288 transitions, 2882 flow [2024-06-20 17:24:33,158 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) [2024-06-20 17:24:33,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:33,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:33,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:24:33,158 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)] === [2024-06-20 17:24:33,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash -84292326, now seen corresponding path program 3 times [2024-06-20 17:24:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:33,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60750824] [2024-06-20 17:24:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60750824] [2024-06-20 17:24:36,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60750824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590622754] [2024-06-20 17:24:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:36,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:36,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:36,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 288 transitions, 2882 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) [2024-06-20 17:24:36,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:36,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:36,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:38,468 INFO L124 PetriNetUnfolderBase]: 3487/5726 cut-off events. [2024-06-20 17:24:38,469 INFO L125 PetriNetUnfolderBase]: For 317396/317396 co-relation queries the response was YES. [2024-06-20 17:24:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31621 conditions, 5726 events. 3487/5726 cut-off events. For 317396/317396 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36445 event pairs, 1038 based on Foata normal form. 10/5735 useless extension candidates. Maximal degree in co-relation 31496. Up to 4804 conditions per place. [2024-06-20 17:24:38,530 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 41 changer transitions 1/341 dead transitions. [2024-06-20 17:24:38,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 341 transitions, 3964 flow [2024-06-20 17:24:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:24:38,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 17:24:38,531 INFO L175 Difference]: Start difference. First operand has 262 places, 288 transitions, 2882 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:24:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 341 transitions, 3964 flow [2024-06-20 17:24:39,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 341 transitions, 3874 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:24:39,580 INFO L231 Difference]: Finished difference. Result has 264 places, 289 transitions, 2897 flow [2024-06-20 17:24:39,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2897, PETRI_PLACES=264, PETRI_TRANSITIONS=289} [2024-06-20 17:24:39,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 17:24:39,580 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 289 transitions, 2897 flow [2024-06-20 17:24:39,580 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) [2024-06-20 17:24:39,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:39,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:24:39,580 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)] === [2024-06-20 17:24:39,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 261627792, now seen corresponding path program 4 times [2024-06-20 17:24:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:39,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004799093] [2024-06-20 17:24:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:43,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:43,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004799093] [2024-06-20 17:24:43,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004799093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:43,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:43,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:43,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044529024] [2024-06-20 17:24:43,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:43,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:43,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:43,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:43,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 289 transitions, 2897 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) [2024-06-20 17:24:43,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:43,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:43,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:45,054 INFO L124 PetriNetUnfolderBase]: 3464/5699 cut-off events. [2024-06-20 17:24:45,054 INFO L125 PetriNetUnfolderBase]: For 290497/290497 co-relation queries the response was YES. [2024-06-20 17:24:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 5699 events. 3464/5699 cut-off events. For 290497/290497 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36356 event pairs, 1093 based on Foata normal form. 10/5708 useless extension candidates. Maximal degree in co-relation 30542. Up to 5162 conditions per place. [2024-06-20 17:24:45,107 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 40 changer transitions 1/332 dead transitions. [2024-06-20 17:24:45,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 332 transitions, 3715 flow [2024-06-20 17:24:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:24:45,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:24:45,109 INFO L175 Difference]: Start difference. First operand has 264 places, 289 transitions, 2897 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:24:45,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 332 transitions, 3715 flow [2024-06-20 17:24:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 332 transitions, 3583 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:46,166 INFO L231 Difference]: Finished difference. Result has 265 places, 289 transitions, 2850 flow [2024-06-20 17:24:46,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2850, PETRI_PLACES=265, PETRI_TRANSITIONS=289} [2024-06-20 17:24:46,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-20 17:24:46,167 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 289 transitions, 2850 flow [2024-06-20 17:24:46,167 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) [2024-06-20 17:24:46,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:46,167 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, 1, 1] [2024-06-20 17:24:46,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:24:46,167 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)] === [2024-06-20 17:24:46,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash 81082100, now seen corresponding path program 5 times [2024-06-20 17:24:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:46,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219568089] [2024-06-20 17:24:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:50,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219568089] [2024-06-20 17:24:50,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219568089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:50,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:50,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:50,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320899375] [2024-06-20 17:24:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:50,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:50,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 289 transitions, 2850 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) [2024-06-20 17:24:50,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:50,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:50,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:52,054 INFO L124 PetriNetUnfolderBase]: 3492/5737 cut-off events. [2024-06-20 17:24:52,055 INFO L125 PetriNetUnfolderBase]: For 288142/288142 co-relation queries the response was YES. [2024-06-20 17:24:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30668 conditions, 5737 events. 3492/5737 cut-off events. For 288142/288142 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36484 event pairs, 1120 based on Foata normal form. 8/5744 useless extension candidates. Maximal degree in co-relation 30542. Up to 5266 conditions per place. [2024-06-20 17:24:52,108 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 35 changer transitions 1/327 dead transitions. [2024-06-20 17:24:52,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 327 transitions, 3642 flow [2024-06-20 17:24:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:24:52,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:24:52,110 INFO L175 Difference]: Start difference. First operand has 265 places, 289 transitions, 2850 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:24:52,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 327 transitions, 3642 flow [2024-06-20 17:24:53,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 327 transitions, 3556 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:24:53,372 INFO L231 Difference]: Finished difference. Result has 266 places, 290 transitions, 2858 flow [2024-06-20 17:24:53,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2858, PETRI_PLACES=266, PETRI_TRANSITIONS=290} [2024-06-20 17:24:53,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-20 17:24:53,372 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 290 transitions, 2858 flow [2024-06-20 17:24:53,372 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) [2024-06-20 17:24:53,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:24:53,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:24:53,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:24:53,373 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)] === [2024-06-20 17:24:53,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:24:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1078945130, now seen corresponding path program 6 times [2024-06-20 17:24:53,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:24:53,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872957929] [2024-06-20 17:24:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:24:53,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:24:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:24:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:24:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:24:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872957929] [2024-06-20 17:24:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872957929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:24:57,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:24:57,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:24:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002134753] [2024-06-20 17:24:57,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:24:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:24:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:24:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:24:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:24:57,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:24:57,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 290 transitions, 2858 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) [2024-06-20 17:24:57,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:24:57,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:24:57,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:24:59,472 INFO L124 PetriNetUnfolderBase]: 3819/6250 cut-off events. [2024-06-20 17:24:59,472 INFO L125 PetriNetUnfolderBase]: For 512987/512989 co-relation queries the response was YES. [2024-06-20 17:24:59,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37815 conditions, 6250 events. 3819/6250 cut-off events. For 512987/512989 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39775 event pairs, 1002 based on Foata normal form. 12/6261 useless extension candidates. Maximal degree in co-relation 37688. Up to 4330 conditions per place. [2024-06-20 17:24:59,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 136 changer transitions 0/348 dead transitions. [2024-06-20 17:24:59,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 348 transitions, 4004 flow [2024-06-20 17:24:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:24:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:24:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 17:24:59,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-20 17:24:59,534 INFO L175 Difference]: Start difference. First operand has 266 places, 290 transitions, 2858 flow. Second operand 9 states and 184 transitions. [2024-06-20 17:24:59,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 348 transitions, 4004 flow [2024-06-20 17:25:00,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 348 transitions, 3928 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:00,737 INFO L231 Difference]: Finished difference. Result has 268 places, 292 transitions, 3108 flow [2024-06-20 17:25:00,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3108, PETRI_PLACES=268, PETRI_TRANSITIONS=292} [2024-06-20 17:25:00,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 17:25:00,738 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 292 transitions, 3108 flow [2024-06-20 17:25:00,738 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) [2024-06-20 17:25:00,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:00,738 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, 1, 1] [2024-06-20 17:25:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:25:00,738 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)] === [2024-06-20 17:25:00,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash -805908748, now seen corresponding path program 7 times [2024-06-20 17:25:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:00,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969600927] [2024-06-20 17:25:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:04,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:04,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969600927] [2024-06-20 17:25:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969600927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:04,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012467016] [2024-06-20 17:25:04,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:04,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:04,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:04,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 3108 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) [2024-06-20 17:25:04,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:04,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:04,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:06,769 INFO L124 PetriNetUnfolderBase]: 3855/6306 cut-off events. [2024-06-20 17:25:06,769 INFO L125 PetriNetUnfolderBase]: For 528850/528852 co-relation queries the response was YES. [2024-06-20 17:25:06,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 6306 events. 3855/6306 cut-off events. For 528850/528852 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40283 event pairs, 1024 based on Foata normal form. 12/6317 useless extension candidates. Maximal degree in co-relation 38806. Up to 5009 conditions per place. [2024-06-20 17:25:06,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 135 changer transitions 0/337 dead transitions. [2024-06-20 17:25:06,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 337 transitions, 3962 flow [2024-06-20 17:25:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:25:06,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 17:25:06,829 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 3108 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:25:06,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 337 transitions, 3962 flow [2024-06-20 17:25:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 337 transitions, 3745 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:25:07,873 INFO L231 Difference]: Finished difference. Result has 272 places, 293 transitions, 3194 flow [2024-06-20 17:25:07,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3194, PETRI_PLACES=272, PETRI_TRANSITIONS=293} [2024-06-20 17:25:07,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 17:25:07,873 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 293 transitions, 3194 flow [2024-06-20 17:25:07,873 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) [2024-06-20 17:25:07,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:07,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:07,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:25:07,874 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)] === [2024-06-20 17:25:07,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash -244048140, now seen corresponding path program 8 times [2024-06-20 17:25:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709308442] [2024-06-20 17:25:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:07,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:11,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:11,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709308442] [2024-06-20 17:25:11,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709308442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:11,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420382552] [2024-06-20 17:25:11,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:11,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:11,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:11,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:11,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 293 transitions, 3194 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) [2024-06-20 17:25:11,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:11,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:14,091 INFO L124 PetriNetUnfolderBase]: 3891/6356 cut-off events. [2024-06-20 17:25:14,091 INFO L125 PetriNetUnfolderBase]: For 538016/538018 co-relation queries the response was YES. [2024-06-20 17:25:14,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39494 conditions, 6356 events. 3891/6356 cut-off events. For 538016/538018 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40613 event pairs, 1032 based on Foata normal form. 12/6367 useless extension candidates. Maximal degree in co-relation 39364. Up to 5065 conditions per place. [2024-06-20 17:25:14,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 133 changer transitions 0/333 dead transitions. [2024-06-20 17:25:14,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 333 transitions, 4014 flow [2024-06-20 17:25:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:25:14,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:25:14,167 INFO L175 Difference]: Start difference. First operand has 272 places, 293 transitions, 3194 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:25:14,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 333 transitions, 4014 flow [2024-06-20 17:25:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 333 transitions, 3741 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:15,569 INFO L231 Difference]: Finished difference. Result has 274 places, 294 transitions, 3212 flow [2024-06-20 17:25:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3212, PETRI_PLACES=274, PETRI_TRANSITIONS=294} [2024-06-20 17:25:15,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 17:25:15,569 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 294 transitions, 3212 flow [2024-06-20 17:25:15,569 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) [2024-06-20 17:25:15,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:15,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:25:15,570 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)] === [2024-06-20 17:25:15,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1706986458, now seen corresponding path program 9 times [2024-06-20 17:25:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:15,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501347648] [2024-06-20 17:25:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:18,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501347648] [2024-06-20 17:25:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501347648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719901911] [2024-06-20 17:25:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:18,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:18,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:18,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:18,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 294 transitions, 3212 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) [2024-06-20 17:25:18,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:18,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:20,942 INFO L124 PetriNetUnfolderBase]: 3873/6318 cut-off events. [2024-06-20 17:25:20,942 INFO L125 PetriNetUnfolderBase]: For 508202/508202 co-relation queries the response was YES. [2024-06-20 17:25:20,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38693 conditions, 6318 events. 3873/6318 cut-off events. For 508202/508202 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 40472 event pairs, 1253 based on Foata normal form. 8/6325 useless extension candidates. Maximal degree in co-relation 38562. Up to 5861 conditions per place. [2024-06-20 17:25:21,014 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 33 changer transitions 0/323 dead transitions. [2024-06-20 17:25:21,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 323 transitions, 3952 flow [2024-06-20 17:25:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:25:21,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:25:21,016 INFO L175 Difference]: Start difference. First operand has 274 places, 294 transitions, 3212 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:25:21,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 323 transitions, 3952 flow [2024-06-20 17:25:22,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 323 transitions, 3677 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:22,251 INFO L231 Difference]: Finished difference. Result has 276 places, 294 transitions, 3007 flow [2024-06-20 17:25:22,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3007, PETRI_PLACES=276, PETRI_TRANSITIONS=294} [2024-06-20 17:25:22,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-20 17:25:22,251 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 294 transitions, 3007 flow [2024-06-20 17:25:22,251 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) [2024-06-20 17:25:22,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:22,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:22,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:25:22,252 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)] === [2024-06-20 17:25:22,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1102974578, now seen corresponding path program 10 times [2024-06-20 17:25:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:22,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929405554] [2024-06-20 17:25:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929405554] [2024-06-20 17:25:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929405554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:26,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:26,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104819925] [2024-06-20 17:25:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:26,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:26,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 294 transitions, 3007 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) [2024-06-20 17:25:26,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:26,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:26,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:28,561 INFO L124 PetriNetUnfolderBase]: 3909/6386 cut-off events. [2024-06-20 17:25:28,561 INFO L125 PetriNetUnfolderBase]: For 526276/526276 co-relation queries the response was YES. [2024-06-20 17:25:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38542 conditions, 6386 events. 3909/6386 cut-off events. For 526276/526276 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40942 event pairs, 1259 based on Foata normal form. 10/6395 useless extension candidates. Maximal degree in co-relation 38410. Up to 5889 conditions per place. [2024-06-20 17:25:28,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-20 17:25:28,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 326 transitions, 3791 flow [2024-06-20 17:25:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:25:28,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:25:28,637 INFO L175 Difference]: Start difference. First operand has 276 places, 294 transitions, 3007 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:25:28,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 326 transitions, 3791 flow [2024-06-20 17:25:29,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 326 transitions, 3721 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:29,783 INFO L231 Difference]: Finished difference. Result has 278 places, 295 transitions, 3040 flow [2024-06-20 17:25:29,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3040, PETRI_PLACES=278, PETRI_TRANSITIONS=295} [2024-06-20 17:25:29,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 17:25:29,784 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 295 transitions, 3040 flow [2024-06-20 17:25:29,784 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) [2024-06-20 17:25:29,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:29,785 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, 1, 1, 1] [2024-06-20 17:25:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:25:29,785 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)] === [2024-06-20 17:25:29,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -473170344, now seen corresponding path program 1 times [2024-06-20 17:25:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:29,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716118684] [2024-06-20 17:25:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:33,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716118684] [2024-06-20 17:25:33,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716118684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:33,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:33,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992659215] [2024-06-20 17:25:33,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:33,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:33,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:33,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:33,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 295 transitions, 3040 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:33,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:33,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:33,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:36,050 INFO L124 PetriNetUnfolderBase]: 4142/6791 cut-off events. [2024-06-20 17:25:36,050 INFO L125 PetriNetUnfolderBase]: For 700172/700174 co-relation queries the response was YES. [2024-06-20 17:25:36,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44277 conditions, 6791 events. 4142/6791 cut-off events. For 700172/700174 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 43806 event pairs, 1044 based on Foata normal form. 8/6798 useless extension candidates. Maximal degree in co-relation 44144. Up to 3732 conditions per place. [2024-06-20 17:25:36,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 143 changer transitions 0/358 dead transitions. [2024-06-20 17:25:36,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 358 transitions, 4438 flow [2024-06-20 17:25:36,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-20 17:25:36,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-20 17:25:36,117 INFO L175 Difference]: Start difference. First operand has 278 places, 295 transitions, 3040 flow. Second operand 9 states and 187 transitions. [2024-06-20 17:25:36,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 358 transitions, 4438 flow [2024-06-20 17:25:37,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 358 transitions, 4355 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:25:37,508 INFO L231 Difference]: Finished difference. Result has 280 places, 297 transitions, 3301 flow [2024-06-20 17:25:37,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3301, PETRI_PLACES=280, PETRI_TRANSITIONS=297} [2024-06-20 17:25:37,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 17:25:37,508 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 297 transitions, 3301 flow [2024-06-20 17:25:37,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:37,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:37,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:37,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:25:37,509 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)] === [2024-06-20 17:25:37,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash 723192220, now seen corresponding path program 2 times [2024-06-20 17:25:37,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:37,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959210891] [2024-06-20 17:25:37,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:37,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:42,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959210891] [2024-06-20 17:25:42,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959210891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:42,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:42,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:42,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809585976] [2024-06-20 17:25:42,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:42,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:42,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:42,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 297 transitions, 3301 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:42,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:42,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:42,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:44,591 INFO L124 PetriNetUnfolderBase]: 4162/6813 cut-off events. [2024-06-20 17:25:44,591 INFO L125 PetriNetUnfolderBase]: For 720056/720058 co-relation queries the response was YES. [2024-06-20 17:25:44,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45334 conditions, 6813 events. 4162/6813 cut-off events. For 720056/720058 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43893 event pairs, 1123 based on Foata normal form. 8/6820 useless extension candidates. Maximal degree in co-relation 45200. Up to 3744 conditions per place. [2024-06-20 17:25:44,667 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 144 changer transitions 0/351 dead transitions. [2024-06-20 17:25:44,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 351 transitions, 4445 flow [2024-06-20 17:25:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-20 17:25:44,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-20 17:25:44,668 INFO L175 Difference]: Start difference. First operand has 280 places, 297 transitions, 3301 flow. Second operand 9 states and 179 transitions. [2024-06-20 17:25:44,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 351 transitions, 4445 flow [2024-06-20 17:25:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 351 transitions, 4114 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:46,438 INFO L231 Difference]: Finished difference. Result has 283 places, 298 transitions, 3290 flow [2024-06-20 17:25:46,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3290, PETRI_PLACES=283, PETRI_TRANSITIONS=298} [2024-06-20 17:25:46,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:25:46,439 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 298 transitions, 3290 flow [2024-06-20 17:25:46,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:46,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:46,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:25:46,439 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)] === [2024-06-20 17:25:46,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1777986058, now seen corresponding path program 3 times [2024-06-20 17:25:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:46,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4987356] [2024-06-20 17:25:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:46,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4987356] [2024-06-20 17:25:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4987356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:50,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982464699] [2024-06-20 17:25:50,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:50,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:50,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:50,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 298 transitions, 3290 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:50,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:50,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:50,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:25:52,968 INFO L124 PetriNetUnfolderBase]: 4182/6863 cut-off events. [2024-06-20 17:25:52,968 INFO L125 PetriNetUnfolderBase]: For 731124/731126 co-relation queries the response was YES. [2024-06-20 17:25:53,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45473 conditions, 6863 events. 4182/6863 cut-off events. For 731124/731126 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 44612 event pairs, 1171 based on Foata normal form. 8/6870 useless extension candidates. Maximal degree in co-relation 45338. Up to 5412 conditions per place. [2024-06-20 17:25:53,037 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 200 selfloop transitions, 135 changer transitions 0/340 dead transitions. [2024-06-20 17:25:53,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 340 transitions, 4142 flow [2024-06-20 17:25:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:25:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:25:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:25:53,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:25:53,039 INFO L175 Difference]: Start difference. First operand has 283 places, 298 transitions, 3290 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:25:53,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 340 transitions, 4142 flow [2024-06-20 17:25:54,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 340 transitions, 3888 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:25:54,903 INFO L231 Difference]: Finished difference. Result has 286 places, 299 transitions, 3330 flow [2024-06-20 17:25:54,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=286, PETRI_TRANSITIONS=299} [2024-06-20 17:25:54,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 17:25:54,904 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 299 transitions, 3330 flow [2024-06-20 17:25:54,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:54,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:25:54,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:25:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:25:54,904 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)] === [2024-06-20 17:25:54,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:25:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1672973912, now seen corresponding path program 4 times [2024-06-20 17:25:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:25:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911341870] [2024-06-20 17:25:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:25:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:25:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:25:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:25:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:25:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911341870] [2024-06-20 17:25:59,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911341870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:25:59,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:25:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:25:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184755819] [2024-06-20 17:25:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:25:59,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:25:59,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:25:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:25:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:25:59,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:25:59,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 299 transitions, 3330 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:25:59,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:25:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:25:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:01,388 INFO L124 PetriNetUnfolderBase]: 4202/6887 cut-off events. [2024-06-20 17:26:01,389 INFO L125 PetriNetUnfolderBase]: For 746802/746802 co-relation queries the response was YES. [2024-06-20 17:26:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45730 conditions, 6887 events. 4202/6887 cut-off events. For 746802/746802 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 44830 event pairs, 1430 based on Foata normal form. 6/6892 useless extension candidates. Maximal degree in co-relation 45594. Up to 6324 conditions per place. [2024-06-20 17:26:01,472 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 39 changer transitions 0/333 dead transitions. [2024-06-20 17:26:01,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 333 transitions, 4145 flow [2024-06-20 17:26:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:26:01,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:26:01,473 INFO L175 Difference]: Start difference. First operand has 286 places, 299 transitions, 3330 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:26:01,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 333 transitions, 4145 flow [2024-06-20 17:26:03,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 333 transitions, 3869 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:03,763 INFO L231 Difference]: Finished difference. Result has 288 places, 300 transitions, 3157 flow [2024-06-20 17:26:03,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3157, PETRI_PLACES=288, PETRI_TRANSITIONS=300} [2024-06-20 17:26:03,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-20 17:26:03,763 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 300 transitions, 3157 flow [2024-06-20 17:26:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:26:03,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:03,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:26:03,764 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)] === [2024-06-20 17:26:03,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1088897784, now seen corresponding path program 11 times [2024-06-20 17:26:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216899054] [2024-06-20 17:26:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216899054] [2024-06-20 17:26:07,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216899054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:07,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:07,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48270651] [2024-06-20 17:26:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:07,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:07,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:07,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:07,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 300 transitions, 3157 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) [2024-06-20 17:26:07,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:07,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:07,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:09,782 INFO L124 PetriNetUnfolderBase]: 4503/7352 cut-off events. [2024-06-20 17:26:09,782 INFO L125 PetriNetUnfolderBase]: For 1017494/1017494 co-relation queries the response was YES. [2024-06-20 17:26:09,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52305 conditions, 7352 events. 4503/7352 cut-off events. For 1017494/1017494 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47903 event pairs, 1272 based on Foata normal form. 10/7357 useless extension candidates. Maximal degree in co-relation 52168. Up to 5394 conditions per place. [2024-06-20 17:26:09,866 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 119 changer transitions 0/354 dead transitions. [2024-06-20 17:26:09,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 354 transitions, 4325 flow [2024-06-20 17:26:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:26:09,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-20 17:26:09,868 INFO L175 Difference]: Start difference. First operand has 288 places, 300 transitions, 3157 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:26:09,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 354 transitions, 4325 flow [2024-06-20 17:26:12,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 354 transitions, 4239 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:12,263 INFO L231 Difference]: Finished difference. Result has 290 places, 302 transitions, 3367 flow [2024-06-20 17:26:12,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3367, PETRI_PLACES=290, PETRI_TRANSITIONS=302} [2024-06-20 17:26:12,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 17:26:12,264 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 302 transitions, 3367 flow [2024-06-20 17:26:12,264 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) [2024-06-20 17:26:12,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:12,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:26:12,265 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)] === [2024-06-20 17:26:12,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1089107034, now seen corresponding path program 12 times [2024-06-20 17:26:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095055049] [2024-06-20 17:26:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:12,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095055049] [2024-06-20 17:26:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095055049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:16,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064554496] [2024-06-20 17:26:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:16,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:16,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 302 transitions, 3367 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) [2024-06-20 17:26:16,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:16,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:18,737 INFO L124 PetriNetUnfolderBase]: 4539/7408 cut-off events. [2024-06-20 17:26:18,737 INFO L125 PetriNetUnfolderBase]: For 1042745/1042745 co-relation queries the response was YES. [2024-06-20 17:26:18,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53444 conditions, 7408 events. 4539/7408 cut-off events. For 1042745/1042745 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48347 event pairs, 1294 based on Foata normal form. 10/7413 useless extension candidates. Maximal degree in co-relation 53306. Up to 6089 conditions per place. [2024-06-20 17:26:18,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 118 changer transitions 0/343 dead transitions. [2024-06-20 17:26:18,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 343 transitions, 4223 flow [2024-06-20 17:26:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:26:18,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 17:26:18,820 INFO L175 Difference]: Start difference. First operand has 290 places, 302 transitions, 3367 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:26:18,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 343 transitions, 4223 flow [2024-06-20 17:26:21,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 343 transitions, 4034 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:26:21,129 INFO L231 Difference]: Finished difference. Result has 294 places, 303 transitions, 3449 flow [2024-06-20 17:26:21,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3449, PETRI_PLACES=294, PETRI_TRANSITIONS=303} [2024-06-20 17:26:21,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 17:26:21,129 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 303 transitions, 3449 flow [2024-06-20 17:26:21,129 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) [2024-06-20 17:26:21,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:21,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:21,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:26:21,129 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)] === [2024-06-20 17:26:21,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:21,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2052926506, now seen corresponding path program 13 times [2024-06-20 17:26:21,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:21,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542791369] [2024-06-20 17:26:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:21,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:25,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:25,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542791369] [2024-06-20 17:26:25,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542791369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:25,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667095177] [2024-06-20 17:26:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:25,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 303 transitions, 3449 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) [2024-06-20 17:26:25,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:25,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:25,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:28,163 INFO L124 PetriNetUnfolderBase]: 4575/7464 cut-off events. [2024-06-20 17:26:28,163 INFO L125 PetriNetUnfolderBase]: For 1060607/1060607 co-relation queries the response was YES. [2024-06-20 17:26:28,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54024 conditions, 7464 events. 4575/7464 cut-off events. For 1060607/1060607 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48734 event pairs, 1296 based on Foata normal form. 10/7469 useless extension candidates. Maximal degree in co-relation 53884. Up to 6145 conditions per place. [2024-06-20 17:26:28,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 115 changer transitions 0/340 dead transitions. [2024-06-20 17:26:28,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 340 transitions, 4279 flow [2024-06-20 17:26:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:26:28,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 17:26:28,250 INFO L175 Difference]: Start difference. First operand has 294 places, 303 transitions, 3449 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:26:28,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 340 transitions, 4279 flow [2024-06-20 17:26:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 340 transitions, 4040 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:30,987 INFO L231 Difference]: Finished difference. Result has 296 places, 304 transitions, 3465 flow [2024-06-20 17:26:30,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3465, PETRI_PLACES=296, PETRI_TRANSITIONS=304} [2024-06-20 17:26:30,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-20 17:26:30,988 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 304 transitions, 3465 flow [2024-06-20 17:26:30,988 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) [2024-06-20 17:26:30,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:30,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:30,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:26:30,988 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)] === [2024-06-20 17:26:30,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:30,989 INFO L85 PathProgramCache]: Analyzing trace with hash -473436880, now seen corresponding path program 14 times [2024-06-20 17:26:30,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:30,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875549444] [2024-06-20 17:26:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:30,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:34,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875549444] [2024-06-20 17:26:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875549444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459072376] [2024-06-20 17:26:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:34,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:34,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 304 transitions, 3465 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) [2024-06-20 17:26:34,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:34,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:36,932 INFO L124 PetriNetUnfolderBase]: 4751/7740 cut-off events. [2024-06-20 17:26:36,933 INFO L125 PetriNetUnfolderBase]: For 1303897/1303897 co-relation queries the response was YES. [2024-06-20 17:26:37,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55417 conditions, 7740 events. 4751/7740 cut-off events. For 1303897/1303897 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50852 event pairs, 1340 based on Foata normal form. 54/7789 useless extension candidates. Maximal degree in co-relation 55276. Up to 6185 conditions per place. [2024-06-20 17:26:37,032 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 109 changer transitions 5/341 dead transitions. [2024-06-20 17:26:37,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 341 transitions, 4295 flow [2024-06-20 17:26:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:37,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:26:37,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:26:37,034 INFO L175 Difference]: Start difference. First operand has 296 places, 304 transitions, 3465 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:26:37,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 341 transitions, 4295 flow [2024-06-20 17:26:39,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 341 transitions, 4060 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:39,413 INFO L231 Difference]: Finished difference. Result has 298 places, 304 transitions, 3468 flow [2024-06-20 17:26:39,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3230, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3468, PETRI_PLACES=298, PETRI_TRANSITIONS=304} [2024-06-20 17:26:39,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-20 17:26:39,413 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 304 transitions, 3468 flow [2024-06-20 17:26:39,413 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) [2024-06-20 17:26:39,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:39,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:39,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:26:39,414 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)] === [2024-06-20 17:26:39,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash -981873062, now seen corresponding path program 15 times [2024-06-20 17:26:39,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:39,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683171954] [2024-06-20 17:26:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683171954] [2024-06-20 17:26:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683171954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:43,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:43,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881867886] [2024-06-20 17:26:43,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:43,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:43,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 304 transitions, 3468 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) [2024-06-20 17:26:43,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:43,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:43,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:45,582 INFO L124 PetriNetUnfolderBase]: 4616/7547 cut-off events. [2024-06-20 17:26:45,583 INFO L125 PetriNetUnfolderBase]: For 1055368/1055368 co-relation queries the response was YES. [2024-06-20 17:26:45,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49268 conditions, 7547 events. 4616/7547 cut-off events. For 1055368/1055368 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49721 event pairs, 1534 based on Foata normal form. 54/7596 useless extension candidates. Maximal degree in co-relation 49126. Up to 6522 conditions per place. [2024-06-20 17:26:45,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 57 changer transitions 5/334 dead transitions. [2024-06-20 17:26:45,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 334 transitions, 4244 flow [2024-06-20 17:26:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:26:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:26:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:26:45,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:26:45,671 INFO L175 Difference]: Start difference. First operand has 298 places, 304 transitions, 3468 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:26:45,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 334 transitions, 4244 flow [2024-06-20 17:26:48,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 334 transitions, 4013 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:26:48,632 INFO L231 Difference]: Finished difference. Result has 300 places, 303 transitions, 3349 flow [2024-06-20 17:26:48,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3349, PETRI_PLACES=300, PETRI_TRANSITIONS=303} [2024-06-20 17:26:48,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 17:26:48,633 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 303 transitions, 3349 flow [2024-06-20 17:26:48,633 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) [2024-06-20 17:26:48,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:48,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:48,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:26:48,633 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)] === [2024-06-20 17:26:48,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1878646116, now seen corresponding path program 16 times [2024-06-20 17:26:48,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:48,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898836972] [2024-06-20 17:26:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:48,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:26:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:26:52,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:26:52,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898836972] [2024-06-20 17:26:52,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898836972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:26:52,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:26:52,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:26:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43599135] [2024-06-20 17:26:52,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:26:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:26:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:26:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:26:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:26:52,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:26:52,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 303 transitions, 3349 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) [2024-06-20 17:26:52,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:26:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:26:52,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:26:54,435 INFO L124 PetriNetUnfolderBase]: 4481/7354 cut-off events. [2024-06-20 17:26:54,435 INFO L125 PetriNetUnfolderBase]: For 793314/793314 co-relation queries the response was YES. [2024-06-20 17:26:54,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42661 conditions, 7354 events. 4481/7354 cut-off events. For 793314/793314 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 48538 event pairs, 1465 based on Foata normal form. 54/7403 useless extension candidates. Maximal degree in co-relation 42518. Up to 6325 conditions per place. [2024-06-20 17:26:54,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 61 changer transitions 5/338 dead transitions. [2024-06-20 17:26:54,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 338 transitions, 4143 flow [2024-06-20 17:26:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:26:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:26:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-20 17:26:54,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-20 17:26:54,525 INFO L175 Difference]: Start difference. First operand has 300 places, 303 transitions, 3349 flow. Second operand 11 states and 185 transitions. [2024-06-20 17:26:54,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 338 transitions, 4143 flow [2024-06-20 17:26:57,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 338 transitions, 4005 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:26:57,018 INFO L231 Difference]: Finished difference. Result has 303 places, 302 transitions, 3330 flow [2024-06-20 17:26:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3330, PETRI_PLACES=303, PETRI_TRANSITIONS=302} [2024-06-20 17:26:57,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-20 17:26:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 302 transitions, 3330 flow [2024-06-20 17:26:57,018 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) [2024-06-20 17:26:57,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:26:57,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:26:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:26:57,019 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)] === [2024-06-20 17:26:57,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:26:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash -430139782, now seen corresponding path program 5 times [2024-06-20 17:26:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:26:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206233771] [2024-06-20 17:26:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:26:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:26:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:01,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:01,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206233771] [2024-06-20 17:27:01,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206233771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:01,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:01,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:01,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456125302] [2024-06-20 17:27:01,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:01,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:01,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:01,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:01,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:01,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 302 transitions, 3330 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:01,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:01,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:01,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:03,398 INFO L124 PetriNetUnfolderBase]: 4694/7725 cut-off events. [2024-06-20 17:27:03,398 INFO L125 PetriNetUnfolderBase]: For 773404/773404 co-relation queries the response was YES. [2024-06-20 17:27:03,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48492 conditions, 7725 events. 4694/7725 cut-off events. For 773404/773404 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51281 event pairs, 1222 based on Foata normal form. 6/7726 useless extension candidates. Maximal degree in co-relation 48348. Up to 4959 conditions per place. [2024-06-20 17:27:03,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 124 changer transitions 0/361 dead transitions. [2024-06-20 17:27:03,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 361 transitions, 4566 flow [2024-06-20 17:27:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:27:03,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 17:27:03,492 INFO L175 Difference]: Start difference. First operand has 303 places, 302 transitions, 3330 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:27:03,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 361 transitions, 4566 flow [2024-06-20 17:27:06,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 361 transitions, 4426 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:27:06,568 INFO L231 Difference]: Finished difference. Result has 302 places, 304 transitions, 3500 flow [2024-06-20 17:27:06,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3500, PETRI_PLACES=302, PETRI_TRANSITIONS=304} [2024-06-20 17:27:06,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 17:27:06,569 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 304 transitions, 3500 flow [2024-06-20 17:27:06,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:06,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:06,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:06,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:27:06,569 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)] === [2024-06-20 17:27:06,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1152940466, now seen corresponding path program 6 times [2024-06-20 17:27:06,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957528176] [2024-06-20 17:27:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:06,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:10,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957528176] [2024-06-20 17:27:10,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957528176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:10,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:10,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:10,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294378953] [2024-06-20 17:27:10,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:10,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:10,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 304 transitions, 3500 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:10,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:10,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:10,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:13,101 INFO L124 PetriNetUnfolderBase]: 4714/7753 cut-off events. [2024-06-20 17:27:13,101 INFO L125 PetriNetUnfolderBase]: For 792553/792553 co-relation queries the response was YES. [2024-06-20 17:27:13,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49295 conditions, 7753 events. 4714/7753 cut-off events. For 792553/792553 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51536 event pairs, 1319 based on Foata normal form. 6/7754 useless extension candidates. Maximal degree in co-relation 49150. Up to 4971 conditions per place. [2024-06-20 17:27:13,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-20 17:27:13,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 355 transitions, 4670 flow [2024-06-20 17:27:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:27:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-20 17:27:13,185 INFO L175 Difference]: Start difference. First operand has 302 places, 304 transitions, 3500 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:27:13,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 355 transitions, 4670 flow [2024-06-20 17:27:16,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 355 transitions, 4377 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:16,696 INFO L231 Difference]: Finished difference. Result has 305 places, 305 transitions, 3487 flow [2024-06-20 17:27:16,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3487, PETRI_PLACES=305, PETRI_TRANSITIONS=305} [2024-06-20 17:27:16,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 17:27:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 305 transitions, 3487 flow [2024-06-20 17:27:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:16,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:27:16,697 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)] === [2024-06-20 17:27:16,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2108751816, now seen corresponding path program 7 times [2024-06-20 17:27:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:16,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870845030] [2024-06-20 17:27:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870845030] [2024-06-20 17:27:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870845030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:20,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537254741] [2024-06-20 17:27:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:20,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:20,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:20,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 305 transitions, 3487 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:20,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:20,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:20,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:22,953 INFO L124 PetriNetUnfolderBase]: 4734/7797 cut-off events. [2024-06-20 17:27:22,953 INFO L125 PetriNetUnfolderBase]: For 802804/802804 co-relation queries the response was YES. [2024-06-20 17:27:23,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49346 conditions, 7797 events. 4734/7797 cut-off events. For 802804/802804 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 52092 event pairs, 1357 based on Foata normal form. 6/7798 useless extension candidates. Maximal degree in co-relation 49200. Up to 6368 conditions per place. [2024-06-20 17:27:23,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 114 changer transitions 0/344 dead transitions. [2024-06-20 17:27:23,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 344 transitions, 4343 flow [2024-06-20 17:27:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:27:23,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:27:23,058 INFO L175 Difference]: Start difference. First operand has 305 places, 305 transitions, 3487 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:27:23,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 344 transitions, 4343 flow [2024-06-20 17:27:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 344 transitions, 4119 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:27:26,928 INFO L231 Difference]: Finished difference. Result has 308 places, 306 transitions, 3515 flow [2024-06-20 17:27:26,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3515, PETRI_PLACES=308, PETRI_TRANSITIONS=306} [2024-06-20 17:27:26,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 17:27:26,928 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 306 transitions, 3515 flow [2024-06-20 17:27:26,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:26,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:26,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:26,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:27:26,929 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)] === [2024-06-20 17:27:26,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1327071656, now seen corresponding path program 8 times [2024-06-20 17:27:26,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:26,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959543526] [2024-06-20 17:27:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:30,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:30,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959543526] [2024-06-20 17:27:30,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959543526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:30,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:30,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:30,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037084557] [2024-06-20 17:27:30,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:30,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:30,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:30,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:30,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 306 transitions, 3515 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:30,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:30,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:30,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:33,344 INFO L124 PetriNetUnfolderBase]: 5140/8491 cut-off events. [2024-06-20 17:27:33,344 INFO L125 PetriNetUnfolderBase]: For 1245074/1245074 co-relation queries the response was YES. [2024-06-20 17:27:33,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60029 conditions, 8491 events. 5140/8491 cut-off events. For 1245074/1245074 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 57167 event pairs, 1486 based on Foata normal form. 6/8492 useless extension candidates. Maximal degree in co-relation 59882. Up to 4718 conditions per place. [2024-06-20 17:27:33,446 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 115 changer transitions 0/368 dead transitions. [2024-06-20 17:27:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 368 transitions, 4985 flow [2024-06-20 17:27:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 17:27:33,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-20 17:27:33,447 INFO L175 Difference]: Start difference. First operand has 308 places, 306 transitions, 3515 flow. Second operand 9 states and 183 transitions. [2024-06-20 17:27:33,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 368 transitions, 4985 flow [2024-06-20 17:27:37,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 368 transitions, 4751 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:27:37,711 INFO L231 Difference]: Finished difference. Result has 310 places, 307 transitions, 3543 flow [2024-06-20 17:27:37,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3543, PETRI_PLACES=310, PETRI_TRANSITIONS=307} [2024-06-20 17:27:37,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-20 17:27:37,711 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 307 transitions, 3543 flow [2024-06-20 17:27:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:37,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:37,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:37,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:27:37,712 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)] === [2024-06-20 17:27:37,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 144212144, now seen corresponding path program 9 times [2024-06-20 17:27:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:37,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768202252] [2024-06-20 17:27:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768202252] [2024-06-20 17:27:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768202252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:41,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:41,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127708871] [2024-06-20 17:27:41,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:41,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:41,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:41,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 307 transitions, 3543 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:41,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:41,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:41,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:44,577 INFO L124 PetriNetUnfolderBase]: 5160/8539 cut-off events. [2024-06-20 17:27:44,577 INFO L125 PetriNetUnfolderBase]: For 1270753/1270753 co-relation queries the response was YES. [2024-06-20 17:27:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60630 conditions, 8539 events. 5160/8539 cut-off events. For 1270753/1270753 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 57647 event pairs, 1486 based on Foata normal form. 6/8540 useless extension candidates. Maximal degree in co-relation 60482. Up to 4730 conditions per place. [2024-06-20 17:27:44,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 244 selfloop transitions, 113 changer transitions 0/362 dead transitions. [2024-06-20 17:27:44,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 362 transitions, 4973 flow [2024-06-20 17:27:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 17:27:44,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-20 17:27:44,686 INFO L175 Difference]: Start difference. First operand has 310 places, 307 transitions, 3543 flow. Second operand 9 states and 176 transitions. [2024-06-20 17:27:44,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 362 transitions, 4973 flow [2024-06-20 17:27:49,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 362 transitions, 4455 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-20 17:27:49,078 INFO L231 Difference]: Finished difference. Result has 306 places, 308 transitions, 3285 flow [2024-06-20 17:27:49,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3285, PETRI_PLACES=306, PETRI_TRANSITIONS=308} [2024-06-20 17:27:49,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-20 17:27:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 308 transitions, 3285 flow [2024-06-20 17:27:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:27:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:27:49,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:27:49,078 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)] === [2024-06-20 17:27:49,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:27:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1002061766, now seen corresponding path program 10 times [2024-06-20 17:27:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:27:49,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759323407] [2024-06-20 17:27:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:27:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:27:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:27:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:27:52,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:27:52,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759323407] [2024-06-20 17:27:52,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759323407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:27:52,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:27:52,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:27:52,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714134813] [2024-06-20 17:27:52,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:27:52,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:27:52,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:27:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:27:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:27:52,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:27:52,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 308 transitions, 3285 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:27:52,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:27:52,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:27:52,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:27:55,733 INFO L124 PetriNetUnfolderBase]: 5454/9017 cut-off events. [2024-06-20 17:27:55,733 INFO L125 PetriNetUnfolderBase]: For 1664290/1664290 co-relation queries the response was YES. [2024-06-20 17:27:55,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64962 conditions, 9017 events. 5454/9017 cut-off events. For 1664290/1664290 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 61429 event pairs, 1537 based on Foata normal form. 30/9042 useless extension candidates. Maximal degree in co-relation 64820. Up to 4879 conditions per place. [2024-06-20 17:27:55,830 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 108 changer transitions 8/363 dead transitions. [2024-06-20 17:27:55,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 363 transitions, 4702 flow [2024-06-20 17:27:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:27:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:27:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 17:27:55,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-20 17:27:55,831 INFO L175 Difference]: Start difference. First operand has 306 places, 308 transitions, 3285 flow. Second operand 9 states and 176 transitions. [2024-06-20 17:27:55,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 363 transitions, 4702 flow [2024-06-20 17:28:01,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 363 transitions, 4485 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:01,618 INFO L231 Difference]: Finished difference. Result has 309 places, 307 transitions, 3292 flow [2024-06-20 17:28:01,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3292, PETRI_PLACES=309, PETRI_TRANSITIONS=307} [2024-06-20 17:28:01,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 17:28:01,618 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 307 transitions, 3292 flow [2024-06-20 17:28:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:01,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:01,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:28:01,619 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)] === [2024-06-20 17:28:01,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1192567736, now seen corresponding path program 11 times [2024-06-20 17:28:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:01,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535722404] [2024-06-20 17:28:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:01,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535722404] [2024-06-20 17:28:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535722404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932811213] [2024-06-20 17:28:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:05,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:05,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 307 transitions, 3292 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:05,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:05,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:05,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:08,374 INFO L124 PetriNetUnfolderBase]: 5454/9021 cut-off events. [2024-06-20 17:28:08,374 INFO L125 PetriNetUnfolderBase]: For 1764005/1764005 co-relation queries the response was YES. [2024-06-20 17:28:08,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65381 conditions, 9021 events. 5454/9021 cut-off events. For 1764005/1764005 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62010 event pairs, 1713 based on Foata normal form. 42/9058 useless extension candidates. Maximal degree in co-relation 65238. Up to 7096 conditions per place. [2024-06-20 17:28:08,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 107 changer transitions 11/350 dead transitions. [2024-06-20 17:28:08,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 350 transitions, 4190 flow [2024-06-20 17:28:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:28:08,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:28:08,489 INFO L175 Difference]: Start difference. First operand has 309 places, 307 transitions, 3292 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:28:08,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 350 transitions, 4190 flow [2024-06-20 17:28:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 350 transitions, 3966 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:14,082 INFO L231 Difference]: Finished difference. Result has 311 places, 306 transitions, 3286 flow [2024-06-20 17:28:14,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3286, PETRI_PLACES=311, PETRI_TRANSITIONS=306} [2024-06-20 17:28:14,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 17:28:14,082 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 306 transitions, 3286 flow [2024-06-20 17:28:14,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:14,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:14,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:14,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:28:14,083 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)] === [2024-06-20 17:28:14,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1184524166, now seen corresponding path program 12 times [2024-06-20 17:28:14,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:14,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797721234] [2024-06-20 17:28:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:17,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:17,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797721234] [2024-06-20 17:28:17,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797721234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:17,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:17,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:17,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348542036] [2024-06-20 17:28:17,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:17,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:17,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:17,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 306 transitions, 3286 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:17,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:17,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:17,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:20,509 INFO L124 PetriNetUnfolderBase]: 5082/8413 cut-off events. [2024-06-20 17:28:20,509 INFO L125 PetriNetUnfolderBase]: For 1575826/1575826 co-relation queries the response was YES. [2024-06-20 17:28:20,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59422 conditions, 8413 events. 5082/8413 cut-off events. For 1575826/1575826 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 57165 event pairs, 1517 based on Foata normal form. 42/8450 useless extension candidates. Maximal degree in co-relation 59278. Up to 5602 conditions per place. [2024-06-20 17:28:20,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 231 selfloop transitions, 104 changer transitions 14/354 dead transitions. [2024-06-20 17:28:20,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 354 transitions, 4448 flow [2024-06-20 17:28:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:28:20,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 17:28:20,618 INFO L175 Difference]: Start difference. First operand has 311 places, 306 transitions, 3286 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:28:20,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 354 transitions, 4448 flow [2024-06-20 17:28:25,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 354 transitions, 4220 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:25,696 INFO L231 Difference]: Finished difference. Result has 313 places, 303 transitions, 3254 flow [2024-06-20 17:28:25,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3254, PETRI_PLACES=313, PETRI_TRANSITIONS=303} [2024-06-20 17:28:25,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-20 17:28:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 303 transitions, 3254 flow [2024-06-20 17:28:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:25,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:25,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:28:25,696 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)] === [2024-06-20 17:28:25,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 373899430, now seen corresponding path program 13 times [2024-06-20 17:28:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4418508] [2024-06-20 17:28:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:29,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:29,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4418508] [2024-06-20 17:28:29,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4418508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:29,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:29,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232473070] [2024-06-20 17:28:29,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:29,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:29,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:29,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 303 transitions, 3254 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:29,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:29,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:29,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:32,006 INFO L124 PetriNetUnfolderBase]: 4753/7854 cut-off events. [2024-06-20 17:28:32,006 INFO L125 PetriNetUnfolderBase]: For 1346238/1346238 co-relation queries the response was YES. [2024-06-20 17:28:32,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52775 conditions, 7854 events. 4753/7854 cut-off events. For 1346238/1346238 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 52861 event pairs, 1613 based on Foata normal form. 42/7891 useless extension candidates. Maximal degree in co-relation 52630. Up to 6527 conditions per place. [2024-06-20 17:28:32,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 55 changer transitions 12/339 dead transitions. [2024-06-20 17:28:32,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 339 transitions, 4092 flow [2024-06-20 17:28:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:28:32,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 17:28:32,105 INFO L175 Difference]: Start difference. First operand has 313 places, 303 transitions, 3254 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:28:32,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 339 transitions, 4092 flow [2024-06-20 17:28:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 339 transitions, 3864 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:36,576 INFO L231 Difference]: Finished difference. Result has 315 places, 300 transitions, 3108 flow [2024-06-20 17:28:36,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3108, PETRI_PLACES=315, PETRI_TRANSITIONS=300} [2024-06-20 17:28:36,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 17:28:36,577 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 300 transitions, 3108 flow [2024-06-20 17:28:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:36,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:36,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:36,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:28:36,577 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)] === [2024-06-20 17:28:36,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1572717942, now seen corresponding path program 14 times [2024-06-20 17:28:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:36,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387749724] [2024-06-20 17:28:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387749724] [2024-06-20 17:28:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387749724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:40,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249442237] [2024-06-20 17:28:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:40,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:40,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:40,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:40,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 300 transitions, 3108 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:40,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:40,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:42,563 INFO L124 PetriNetUnfolderBase]: 4340/7171 cut-off events. [2024-06-20 17:28:42,564 INFO L125 PetriNetUnfolderBase]: For 1106006/1106006 co-relation queries the response was YES. [2024-06-20 17:28:42,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 7171 events. 4340/7171 cut-off events. For 1106006/1106006 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47174 event pairs, 1312 based on Foata normal form. 42/7208 useless extension candidates. Maximal degree in co-relation 45108. Up to 4437 conditions per place. [2024-06-20 17:28:42,652 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 269 selfloop transitions, 52 changer transitions 15/341 dead transitions. [2024-06-20 17:28:42,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 341 transitions, 4210 flow [2024-06-20 17:28:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:28:42,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:28:42,653 INFO L175 Difference]: Start difference. First operand has 315 places, 300 transitions, 3108 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:28:42,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 341 transitions, 4210 flow [2024-06-20 17:28:46,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 341 transitions, 4045 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:28:46,942 INFO L231 Difference]: Finished difference. Result has 315 places, 295 transitions, 2996 flow [2024-06-20 17:28:46,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2996, PETRI_PLACES=315, PETRI_TRANSITIONS=295} [2024-06-20 17:28:46,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 17:28:46,942 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 295 transitions, 2996 flow [2024-06-20 17:28:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:28:46,943 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)] === [2024-06-20 17:28:46,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash 40682294, now seen corresponding path program 15 times [2024-06-20 17:28:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:46,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241675791] [2024-06-20 17:28:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:46,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241675791] [2024-06-20 17:28:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241675791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855864055] [2024-06-20 17:28:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:51,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:51,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:51,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:51,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 295 transitions, 2996 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:51,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:51,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:51,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:53,279 INFO L124 PetriNetUnfolderBase]: 3987/6594 cut-off events. [2024-06-20 17:28:53,279 INFO L125 PetriNetUnfolderBase]: For 855342/855342 co-relation queries the response was YES. [2024-06-20 17:28:53,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37979 conditions, 6594 events. 3987/6594 cut-off events. For 855342/855342 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43184 event pairs, 1205 based on Foata normal form. 42/6631 useless extension candidates. Maximal degree in co-relation 37832. Up to 5405 conditions per place. [2024-06-20 17:28:53,360 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 59 changer transitions 10/335 dead transitions. [2024-06-20 17:28:53,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 335 transitions, 3834 flow [2024-06-20 17:28:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:28:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:28:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-20 17:28:53,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-20 17:28:53,361 INFO L175 Difference]: Start difference. First operand has 315 places, 295 transitions, 2996 flow. Second operand 11 states and 188 transitions. [2024-06-20 17:28:53,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 335 transitions, 3834 flow [2024-06-20 17:28:55,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 335 transitions, 3690 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:28:55,866 INFO L231 Difference]: Finished difference. Result has 317 places, 294 transitions, 2958 flow [2024-06-20 17:28:55,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2958, PETRI_PLACES=317, PETRI_TRANSITIONS=294} [2024-06-20 17:28:55,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 17:28:55,867 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 294 transitions, 2958 flow [2024-06-20 17:28:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:55,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:55,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:55,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:28:55,867 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)] === [2024-06-20 17:28:55,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1641964195, now seen corresponding path program 1 times [2024-06-20 17:28:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743101422] [2024-06-20 17:28:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743101422] [2024-06-20 17:28:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743101422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:59,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035582910] [2024-06-20 17:28:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:59,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:28:59,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 294 transitions, 2958 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:59,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:59,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:28:59,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:01,441 INFO L124 PetriNetUnfolderBase]: 4183/6900 cut-off events. [2024-06-20 17:29:01,441 INFO L125 PetriNetUnfolderBase]: For 1017500/1017500 co-relation queries the response was YES. [2024-06-20 17:29:01,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42506 conditions, 6900 events. 4183/6900 cut-off events. For 1017500/1017500 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44784 event pairs, 704 based on Foata normal form. 32/6927 useless extension candidates. Maximal degree in co-relation 42358. Up to 3169 conditions per place. [2024-06-20 17:29:01,527 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 107 changer transitions 22/352 dead transitions. [2024-06-20 17:29:01,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 352 transitions, 4376 flow [2024-06-20 17:29:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 17:29:01,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-20 17:29:01,529 INFO L175 Difference]: Start difference. First operand has 317 places, 294 transitions, 2958 flow. Second operand 9 states and 178 transitions. [2024-06-20 17:29:01,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 352 transitions, 4376 flow [2024-06-20 17:29:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 352 transitions, 4197 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 17:29:05,465 INFO L231 Difference]: Finished difference. Result has 315 places, 289 transitions, 2928 flow [2024-06-20 17:29:05,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2928, PETRI_PLACES=315, PETRI_TRANSITIONS=289} [2024-06-20 17:29:05,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-20 17:29:05,465 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 289 transitions, 2928 flow [2024-06-20 17:29:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:05,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:05,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:29:05,465 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)] === [2024-06-20 17:29:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1494354595, now seen corresponding path program 2 times [2024-06-20 17:29:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385357437] [2024-06-20 17:29:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:09,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385357437] [2024-06-20 17:29:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385357437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319733836] [2024-06-20 17:29:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:09,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:09,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:09,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:09,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 289 transitions, 2928 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:09,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:09,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:11,277 INFO L124 PetriNetUnfolderBase]: 4155/6840 cut-off events. [2024-06-20 17:29:11,277 INFO L125 PetriNetUnfolderBase]: For 1245935/1245935 co-relation queries the response was YES. [2024-06-20 17:29:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45987 conditions, 6840 events. 4155/6840 cut-off events. For 1245935/1245935 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44224 event pairs, 1205 based on Foata normal form. 32/6867 useless extension candidates. Maximal degree in co-relation 45838. Up to 5669 conditions per place. [2024-06-20 17:29:11,349 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 285 selfloop transitions, 32 changer transitions 10/332 dead transitions. [2024-06-20 17:29:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 332 transitions, 4006 flow [2024-06-20 17:29:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 17:29:11,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 17:29:11,350 INFO L175 Difference]: Start difference. First operand has 315 places, 289 transitions, 2928 flow. Second operand 8 states and 147 transitions. [2024-06-20 17:29:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 332 transitions, 4006 flow [2024-06-20 17:29:14,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 332 transitions, 3780 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:29:14,509 INFO L231 Difference]: Finished difference. Result has 309 places, 287 transitions, 2756 flow [2024-06-20 17:29:14,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2756, PETRI_PLACES=309, PETRI_TRANSITIONS=287} [2024-06-20 17:29:14,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 17:29:14,509 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 287 transitions, 2756 flow [2024-06-20 17:29:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:14,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:14,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:29:14,509 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)] === [2024-06-20 17:29:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1494147205, now seen corresponding path program 3 times [2024-06-20 17:29:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312537713] [2024-06-20 17:29:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:18,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312537713] [2024-06-20 17:29:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312537713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:18,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494563039] [2024-06-20 17:29:18,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:18,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:18,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:18,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 287 transitions, 2756 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:18,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:18,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:20,064 INFO L124 PetriNetUnfolderBase]: 3571/5916 cut-off events. [2024-06-20 17:29:20,064 INFO L125 PetriNetUnfolderBase]: For 509822/509822 co-relation queries the response was YES. [2024-06-20 17:29:20,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29721 conditions, 5916 events. 3571/5916 cut-off events. For 509822/509822 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 37879 event pairs, 916 based on Foata normal form. 32/5943 useless extension candidates. Maximal degree in co-relation 29574. Up to 5049 conditions per place. [2024-06-20 17:29:20,129 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 27 changer transitions 29/323 dead transitions. [2024-06-20 17:29:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 323 transitions, 3546 flow [2024-06-20 17:29:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:29:20,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 17:29:20,130 INFO L175 Difference]: Start difference. First operand has 309 places, 287 transitions, 2756 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:29:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 323 transitions, 3546 flow [2024-06-20 17:29:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 323 transitions, 3479 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:22,255 INFO L231 Difference]: Finished difference. Result has 308 places, 281 transitions, 2681 flow [2024-06-20 17:29:22,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2681, PETRI_PLACES=308, PETRI_TRANSITIONS=281} [2024-06-20 17:29:22,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-20 17:29:22,256 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 281 transitions, 2681 flow [2024-06-20 17:29:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:22,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:22,256 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, 1, 1, 1, 1] [2024-06-20 17:29:22,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:29:22,256 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)] === [2024-06-20 17:29:22,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1536798689, now seen corresponding path program 4 times [2024-06-20 17:29:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:22,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872385282] [2024-06-20 17:29:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:22,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872385282] [2024-06-20 17:29:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872385282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706344449] [2024-06-20 17:29:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:25,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:25,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 281 transitions, 2681 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:25,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:25,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:25,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:27,556 INFO L124 PetriNetUnfolderBase]: 3759/6206 cut-off events. [2024-06-20 17:29:27,556 INFO L125 PetriNetUnfolderBase]: For 829497/829497 co-relation queries the response was YES. [2024-06-20 17:29:27,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35624 conditions, 6206 events. 3759/6206 cut-off events. For 829497/829497 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39842 event pairs, 766 based on Foata normal form. 40/6243 useless extension candidates. Maximal degree in co-relation 35478. Up to 3793 conditions per place. [2024-06-20 17:29:27,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 93 changer transitions 15/324 dead transitions. [2024-06-20 17:29:27,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 324 transitions, 3769 flow [2024-06-20 17:29:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:27,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:29:27,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 17:29:27,625 INFO L175 Difference]: Start difference. First operand has 308 places, 281 transitions, 2681 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:29:27,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 324 transitions, 3769 flow [2024-06-20 17:29:29,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 324 transitions, 3696 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 17:29:29,892 INFO L231 Difference]: Finished difference. Result has 300 places, 274 transitions, 2725 flow [2024-06-20 17:29:29,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2725, PETRI_PLACES=300, PETRI_TRANSITIONS=274} [2024-06-20 17:29:29,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 17:29:29,893 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 274 transitions, 2725 flow [2024-06-20 17:29:29,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:29,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:29,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:29,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:29:29,893 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)] === [2024-06-20 17:29:29,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash -481558471, now seen corresponding path program 5 times [2024-06-20 17:29:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:29,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237398168] [2024-06-20 17:29:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:34,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237398168] [2024-06-20 17:29:34,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237398168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:34,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:34,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:34,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933028241] [2024-06-20 17:29:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:34,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:34,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:34,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 274 transitions, 2725 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:34,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:34,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:34,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:36,034 INFO L124 PetriNetUnfolderBase]: 3511/5798 cut-off events. [2024-06-20 17:29:36,034 INFO L125 PetriNetUnfolderBase]: For 785356/785356 co-relation queries the response was YES. [2024-06-20 17:29:36,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33804 conditions, 5798 events. 3511/5798 cut-off events. For 785356/785356 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36837 event pairs, 896 based on Foata normal form. 40/5835 useless extension candidates. Maximal degree in co-relation 33662. Up to 4251 conditions per place. [2024-06-20 17:29:36,100 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 220 selfloop transitions, 78 changer transitions 7/310 dead transitions. [2024-06-20 17:29:36,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 310 transitions, 3725 flow [2024-06-20 17:29:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:29:36,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 17:29:36,102 INFO L175 Difference]: Start difference. First operand has 300 places, 274 transitions, 2725 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:29:36,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 310 transitions, 3725 flow [2024-06-20 17:29:38,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 310 transitions, 3512 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 17:29:38,187 INFO L231 Difference]: Finished difference. Result has 294 places, 271 transitions, 2657 flow [2024-06-20 17:29:38,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2657, PETRI_PLACES=294, PETRI_TRANSITIONS=271} [2024-06-20 17:29:38,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 17:29:38,187 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 271 transitions, 2657 flow [2024-06-20 17:29:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:38,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:38,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:29:38,188 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)] === [2024-06-20 17:29:38,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:38,188 INFO L85 PathProgramCache]: Analyzing trace with hash -481261801, now seen corresponding path program 6 times [2024-06-20 17:29:38,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:38,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911985629] [2024-06-20 17:29:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:38,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:41,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911985629] [2024-06-20 17:29:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911985629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:41,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768032894] [2024-06-20 17:29:41,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:41,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:41,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:41,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:41,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:41,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 271 transitions, 2657 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:41,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:41,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:41,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:43,748 INFO L124 PetriNetUnfolderBase]: 3253/5406 cut-off events. [2024-06-20 17:29:43,748 INFO L125 PetriNetUnfolderBase]: For 527760/527760 co-relation queries the response was YES. [2024-06-20 17:29:43,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 5406 events. 3253/5406 cut-off events. For 527760/527760 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34177 event pairs, 850 based on Foata normal form. 44/5447 useless extension candidates. Maximal degree in co-relation 27082. Up to 4333 conditions per place. [2024-06-20 17:29:43,799 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 215 selfloop transitions, 68 changer transitions 11/299 dead transitions. [2024-06-20 17:29:43,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 299 transitions, 3361 flow [2024-06-20 17:29:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:29:43,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:29:43,800 INFO L175 Difference]: Start difference. First operand has 294 places, 271 transitions, 2657 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:29:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 299 transitions, 3361 flow [2024-06-20 17:29:45,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 299 transitions, 3196 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 17:29:45,413 INFO L231 Difference]: Finished difference. Result has 292 places, 262 transitions, 2568 flow [2024-06-20 17:29:45,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2568, PETRI_PLACES=292, PETRI_TRANSITIONS=262} [2024-06-20 17:29:45,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-20 17:29:45,413 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 262 transitions, 2568 flow [2024-06-20 17:29:45,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:45,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:45,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:45,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:29:45,414 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)] === [2024-06-20 17:29:45,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 701980217, now seen corresponding path program 7 times [2024-06-20 17:29:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382290593] [2024-06-20 17:29:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:50,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:50,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382290593] [2024-06-20 17:29:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382290593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:50,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657942566] [2024-06-20 17:29:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:50,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:50,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:50,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 262 transitions, 2568 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:50,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:50,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:50,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:51,733 INFO L124 PetriNetUnfolderBase]: 3317/5464 cut-off events. [2024-06-20 17:29:51,733 INFO L125 PetriNetUnfolderBase]: For 628899/628899 co-relation queries the response was YES. [2024-06-20 17:29:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30618 conditions, 5464 events. 3317/5464 cut-off events. For 628899/628899 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33958 event pairs, 786 based on Foata normal form. 32/5493 useless extension candidates. Maximal degree in co-relation 30480. Up to 3701 conditions per place. [2024-06-20 17:29:51,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 52 changer transitions 14/298 dead transitions. [2024-06-20 17:29:51,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 298 transitions, 3528 flow [2024-06-20 17:29:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:29:51,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 17:29:51,785 INFO L175 Difference]: Start difference. First operand has 292 places, 262 transitions, 2568 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:29:51,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 298 transitions, 3528 flow [2024-06-20 17:29:53,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 298 transitions, 3372 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 17:29:53,613 INFO L231 Difference]: Finished difference. Result has 288 places, 256 transitions, 2452 flow [2024-06-20 17:29:53,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2452, PETRI_PLACES=288, PETRI_TRANSITIONS=256} [2024-06-20 17:29:53,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-20 17:29:53,613 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 256 transitions, 2452 flow [2024-06-20 17:29:53,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:53,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:53,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:53,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:29:53,614 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)] === [2024-06-20 17:29:53,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:53,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1685217405, now seen corresponding path program 8 times [2024-06-20 17:29:53,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:53,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106899401] [2024-06-20 17:29:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106899401] [2024-06-20 17:29:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106899401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:58,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:58,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:58,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863055823] [2024-06-20 17:29:58,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:58,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:58,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:58,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:29:58,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 256 transitions, 2452 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:58,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:58,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:29:58,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:59,869 INFO L124 PetriNetUnfolderBase]: 2949/4892 cut-off events. [2024-06-20 17:29:59,869 INFO L125 PetriNetUnfolderBase]: For 446293/446293 co-relation queries the response was YES. [2024-06-20 17:29:59,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24976 conditions, 4892 events. 2949/4892 cut-off events. For 446293/446293 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30324 event pairs, 786 based on Foata normal form. 32/4921 useless extension candidates. Maximal degree in co-relation 24839. Up to 3701 conditions per place. [2024-06-20 17:29:59,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 47 changer transitions 26/289 dead transitions. [2024-06-20 17:29:59,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 289 transitions, 3156 flow [2024-06-20 17:29:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 17:29:59,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 17:29:59,917 INFO L175 Difference]: Start difference. First operand has 288 places, 256 transitions, 2452 flow. Second operand 9 states and 152 transitions. [2024-06-20 17:29:59,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 289 transitions, 3156 flow [2024-06-20 17:30:01,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 289 transitions, 3046 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:30:01,560 INFO L231 Difference]: Finished difference. Result has 283 places, 240 transitions, 2270 flow [2024-06-20 17:30:01,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2270, PETRI_PLACES=283, PETRI_TRANSITIONS=240} [2024-06-20 17:30:01,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 17:30:01,561 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 240 transitions, 2270 flow [2024-06-20 17:30:01,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:01,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:01,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:01,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:30:01,561 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)] === [2024-06-20 17:30:01,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -184332025, now seen corresponding path program 9 times [2024-06-20 17:30:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:01,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705488942] [2024-06-20 17:30:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:01,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:05,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705488942] [2024-06-20 17:30:05,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705488942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:05,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:05,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926526607] [2024-06-20 17:30:05,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:05,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:05,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:05,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 240 transitions, 2270 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:05,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:05,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:05,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:07,450 INFO L124 PetriNetUnfolderBase]: 3068/5088 cut-off events. [2024-06-20 17:30:07,450 INFO L125 PetriNetUnfolderBase]: For 669272/669272 co-relation queries the response was YES. [2024-06-20 17:30:07,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29183 conditions, 5088 events. 3068/5088 cut-off events. For 669272/669272 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31685 event pairs, 743 based on Foata normal form. 40/5121 useless extension candidates. Maximal degree in co-relation 29048. Up to 2319 conditions per place. [2024-06-20 17:30:07,508 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 88 changer transitions 27/290 dead transitions. [2024-06-20 17:30:07,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 290 transitions, 3288 flow [2024-06-20 17:30:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:30:07,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 17:30:07,509 INFO L175 Difference]: Start difference. First operand has 283 places, 240 transitions, 2270 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:30:07,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 290 transitions, 3288 flow [2024-06-20 17:30:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 290 transitions, 3145 flow, removed 16 selfloop flow, removed 15 redundant places. [2024-06-20 17:30:08,881 INFO L231 Difference]: Finished difference. Result has 267 places, 232 transitions, 2237 flow [2024-06-20 17:30:08,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2237, PETRI_PLACES=267, PETRI_TRANSITIONS=232} [2024-06-20 17:30:08,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 17:30:08,881 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 232 transitions, 2237 flow [2024-06-20 17:30:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:08,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:08,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:30:08,882 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)] === [2024-06-20 17:30:08,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2033866661, now seen corresponding path program 1 times [2024-06-20 17:30:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:08,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562832110] [2024-06-20 17:30:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:13,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:13,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562832110] [2024-06-20 17:30:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562832110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:13,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:13,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268915414] [2024-06-20 17:30:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:13,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:13,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 232 transitions, 2237 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:13,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:13,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:13,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:14,930 INFO L124 PetriNetUnfolderBase]: 2800/4668 cut-off events. [2024-06-20 17:30:14,930 INFO L125 PetriNetUnfolderBase]: For 650857/650857 co-relation queries the response was YES. [2024-06-20 17:30:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27036 conditions, 4668 events. 2800/4668 cut-off events. For 650857/650857 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28848 event pairs, 801 based on Foata normal form. 44/4705 useless extension candidates. Maximal degree in co-relation 26907. Up to 3475 conditions per place. [2024-06-20 17:30:14,983 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 87 changer transitions 17/267 dead transitions. [2024-06-20 17:30:14,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 267 transitions, 2887 flow [2024-06-20 17:30:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:30:14,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:30:14,984 INFO L175 Difference]: Start difference. First operand has 267 places, 232 transitions, 2237 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:30:14,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 267 transitions, 2887 flow [2024-06-20 17:30:16,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 267 transitions, 2695 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-20 17:30:16,226 INFO L231 Difference]: Finished difference. Result has 259 places, 227 transitions, 2193 flow [2024-06-20 17:30:16,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2193, PETRI_PLACES=259, PETRI_TRANSITIONS=227} [2024-06-20 17:30:16,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-20 17:30:16,226 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 227 transitions, 2193 flow [2024-06-20 17:30:16,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:16,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:16,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:16,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:30:16,226 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)] === [2024-06-20 17:30:16,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 345909641, now seen corresponding path program 2 times [2024-06-20 17:30:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892598616] [2024-06-20 17:30:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892598616] [2024-06-20 17:30:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892598616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:21,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:21,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:21,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700825677] [2024-06-20 17:30:21,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:21,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:21,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:21,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:21,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 227 transitions, 2193 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:21,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:21,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:21,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:23,357 INFO L124 PetriNetUnfolderBase]: 2756/4608 cut-off events. [2024-06-20 17:30:23,357 INFO L125 PetriNetUnfolderBase]: For 580489/580489 co-relation queries the response was YES. [2024-06-20 17:30:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26177 conditions, 4608 events. 2756/4608 cut-off events. For 580489/580489 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28447 event pairs, 719 based on Foata normal form. 40/4641 useless extension candidates. Maximal degree in co-relation 26053. Up to 3351 conditions per place. [2024-06-20 17:30:23,400 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 76 changer transitions 34/265 dead transitions. [2024-06-20 17:30:23,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 265 transitions, 2873 flow [2024-06-20 17:30:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:30:23,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-20 17:30:23,402 INFO L175 Difference]: Start difference. First operand has 259 places, 227 transitions, 2193 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:30:23,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 265 transitions, 2873 flow [2024-06-20 17:30:24,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 265 transitions, 2695 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:30:24,763 INFO L231 Difference]: Finished difference. Result has 257 places, 214 transitions, 2053 flow [2024-06-20 17:30:24,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2053, PETRI_PLACES=257, PETRI_TRANSITIONS=214} [2024-06-20 17:30:24,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-20 17:30:24,764 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 214 transitions, 2053 flow [2024-06-20 17:30:24,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:24,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:24,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:24,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:30:24,765 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)] === [2024-06-20 17:30:24,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1380178739, now seen corresponding path program 3 times [2024-06-20 17:30:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:24,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062223380] [2024-06-20 17:30:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062223380] [2024-06-20 17:30:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062223380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:28,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242434916] [2024-06-20 17:30:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:29,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 214 transitions, 2053 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:29,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:29,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:29,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:30,538 INFO L124 PetriNetUnfolderBase]: 2662/4496 cut-off events. [2024-06-20 17:30:30,539 INFO L125 PetriNetUnfolderBase]: For 603001/603001 co-relation queries the response was YES. [2024-06-20 17:30:30,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27618 conditions, 4496 events. 2662/4496 cut-off events. For 603001/603001 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27948 event pairs, 541 based on Foata normal form. 24/4519 useless extension candidates. Maximal degree in co-relation 27495. Up to 1624 conditions per place. [2024-06-20 17:30:30,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 81 changer transitions 24/261 dead transitions. [2024-06-20 17:30:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 261 transitions, 3163 flow [2024-06-20 17:30:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:30:30,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:30:30,592 INFO L175 Difference]: Start difference. First operand has 257 places, 214 transitions, 2053 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:30:30,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 261 transitions, 3163 flow [2024-06-20 17:30:31,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 261 transitions, 2969 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-20 17:30:31,948 INFO L231 Difference]: Finished difference. Result has 245 places, 205 transitions, 1970 flow [2024-06-20 17:30:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1970, PETRI_PLACES=245, PETRI_TRANSITIONS=205} [2024-06-20 17:30:31,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 17:30:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 205 transitions, 1970 flow [2024-06-20 17:30:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:31,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:30:31,949 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)] === [2024-06-20 17:30:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 198582763, now seen corresponding path program 4 times [2024-06-20 17:30:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948891006] [2024-06-20 17:30:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948891006] [2024-06-20 17:30:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948891006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:36,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406207824] [2024-06-20 17:30:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:36,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:36,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 205 transitions, 1970 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:36,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:36,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:36,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:37,711 INFO L124 PetriNetUnfolderBase]: 2536/4270 cut-off events. [2024-06-20 17:30:37,712 INFO L125 PetriNetUnfolderBase]: For 626619/626627 co-relation queries the response was YES. [2024-06-20 17:30:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28290 conditions, 4270 events. 2536/4270 cut-off events. For 626619/626627 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26175 event pairs, 727 based on Foata normal form. 24/4291 useless extension candidates. Maximal degree in co-relation 28173. Up to 2352 conditions per place. [2024-06-20 17:30:37,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 71 changer transitions 12/246 dead transitions. [2024-06-20 17:30:37,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 246 transitions, 2994 flow [2024-06-20 17:30:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:30:37,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 17:30:37,758 INFO L175 Difference]: Start difference. First operand has 245 places, 205 transitions, 1970 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:30:37,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 246 transitions, 2994 flow [2024-06-20 17:30:38,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 246 transitions, 2761 flow, removed 38 selfloop flow, removed 14 redundant places. [2024-06-20 17:30:38,562 INFO L231 Difference]: Finished difference. Result has 232 places, 200 transitions, 1901 flow [2024-06-20 17:30:38,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=232, PETRI_TRANSITIONS=200} [2024-06-20 17:30:38,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-20 17:30:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 200 transitions, 1901 flow [2024-06-20 17:30:38,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:38,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:30:38,563 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)] === [2024-06-20 17:30:38,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1284110759, now seen corresponding path program 5 times [2024-06-20 17:30:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:38,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327666619] [2024-06-20 17:30:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:42,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327666619] [2024-06-20 17:30:42,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327666619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:42,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:42,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:42,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023945597] [2024-06-20 17:30:42,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:42,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:42,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:42,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:42,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 200 transitions, 1901 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:42,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:42,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:42,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:44,319 INFO L124 PetriNetUnfolderBase]: 2378/4008 cut-off events. [2024-06-20 17:30:44,319 INFO L125 PetriNetUnfolderBase]: For 450555/450563 co-relation queries the response was YES. [2024-06-20 17:30:44,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 4008 events. 2378/4008 cut-off events. For 450555/450563 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24286 event pairs, 709 based on Foata normal form. 24/4029 useless extension candidates. Maximal degree in co-relation 23687. Up to 2352 conditions per place. [2024-06-20 17:30:44,356 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 136 selfloop transitions, 57 changer transitions 37/235 dead transitions. [2024-06-20 17:30:44,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 235 transitions, 2659 flow [2024-06-20 17:30:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:30:44,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-20 17:30:44,357 INFO L175 Difference]: Start difference. First operand has 232 places, 200 transitions, 1901 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:30:44,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 235 transitions, 2659 flow [2024-06-20 17:30:45,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 235 transitions, 2513 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:30:45,163 INFO L231 Difference]: Finished difference. Result has 231 places, 180 transitions, 1712 flow [2024-06-20 17:30:45,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=231, PETRI_TRANSITIONS=180} [2024-06-20 17:30:45,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-20 17:30:45,164 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 180 transitions, 1712 flow [2024-06-20 17:30:45,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:45,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:45,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:30:45,164 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)] === [2024-06-20 17:30:45,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1430859759, now seen corresponding path program 6 times [2024-06-20 17:30:45,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:45,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360350958] [2024-06-20 17:30:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:49,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:49,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360350958] [2024-06-20 17:30:49,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360350958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:49,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996559678] [2024-06-20 17:30:49,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:49,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:49,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:49,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 180 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:49,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:49,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:49,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:51,607 INFO L124 PetriNetUnfolderBase]: 2274/3806 cut-off events. [2024-06-20 17:30:51,607 INFO L125 PetriNetUnfolderBase]: For 507001/507009 co-relation queries the response was YES. [2024-06-20 17:30:51,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22869 conditions, 3806 events. 2274/3806 cut-off events. For 507001/507009 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22747 event pairs, 745 based on Foata normal form. 52/3853 useless extension candidates. Maximal degree in co-relation 22761. Up to 2785 conditions per place. [2024-06-20 17:30:51,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 65 changer transitions 18/208 dead transitions. [2024-06-20 17:30:51,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 208 transitions, 2212 flow [2024-06-20 17:30:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 17:30:51,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 17:30:51,646 INFO L175 Difference]: Start difference. First operand has 231 places, 180 transitions, 1712 flow. Second operand 9 states and 149 transitions. [2024-06-20 17:30:51,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 208 transitions, 2212 flow [2024-06-20 17:30:52,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 2115 flow, removed 14 selfloop flow, removed 18 redundant places. [2024-06-20 17:30:52,163 INFO L231 Difference]: Finished difference. Result has 205 places, 174 transitions, 1708 flow [2024-06-20 17:30:52,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1708, PETRI_PLACES=205, PETRI_TRANSITIONS=174} [2024-06-20 17:30:52,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 17:30:52,164 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 174 transitions, 1708 flow [2024-06-20 17:30:52,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:52,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:52,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:52,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:30:52,164 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)] === [2024-06-20 17:30:52,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1494508799, now seen corresponding path program 7 times [2024-06-20 17:30:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104602490] [2024-06-20 17:30:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:52,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:56,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104602490] [2024-06-20 17:30:56,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104602490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:56,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:56,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:56,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647574961] [2024-06-20 17:30:56,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:56,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:56,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:56,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:30:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 174 transitions, 1708 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:56,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:56,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:30:56,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:58,460 INFO L124 PetriNetUnfolderBase]: 2458/4106 cut-off events. [2024-06-20 17:30:58,460 INFO L125 PetriNetUnfolderBase]: For 457561/457561 co-relation queries the response was YES. [2024-06-20 17:30:58,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25696 conditions, 4106 events. 2458/4106 cut-off events. For 457561/457561 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24743 event pairs, 765 based on Foata normal form. 40/4141 useless extension candidates. Maximal degree in co-relation 25601. Up to 2583 conditions per place. [2024-06-20 17:30:58,497 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 53 changer transitions 24/209 dead transitions. [2024-06-20 17:30:58,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 209 transitions, 2392 flow [2024-06-20 17:30:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:30:58,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 17:30:58,498 INFO L175 Difference]: Start difference. First operand has 205 places, 174 transitions, 1708 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:30:58,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 209 transitions, 2392 flow [2024-06-20 17:30:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 209 transitions, 2254 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:30:59,092 INFO L231 Difference]: Finished difference. Result has 203 places, 159 transitions, 1539 flow [2024-06-20 17:30:59,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1539, PETRI_PLACES=203, PETRI_TRANSITIONS=159} [2024-06-20 17:30:59,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 17:30:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 159 transitions, 1539 flow [2024-06-20 17:30:59,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:59,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:59,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:30:59,093 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:59,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2129093631, now seen corresponding path program 8 times [2024-06-20 17:30:59,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:59,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890676393] [2024-06-20 17:30:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890676393] [2024-06-20 17:31:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890676393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:03,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924095877] [2024-06-20 17:31:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:03,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:03,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:03,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 159 transitions, 1539 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:03,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:03,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:03,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:04,638 INFO L124 PetriNetUnfolderBase]: 2092/3532 cut-off events. [2024-06-20 17:31:04,638 INFO L125 PetriNetUnfolderBase]: For 350513/350513 co-relation queries the response was YES. [2024-06-20 17:31:04,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20383 conditions, 3532 events. 2092/3532 cut-off events. For 350513/350513 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20953 event pairs, 695 based on Foata normal form. 44/3571 useless extension candidates. Maximal degree in co-relation 20289. Up to 2583 conditions per place. [2024-06-20 17:31:04,670 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 55 changer transitions 16/186 dead transitions. [2024-06-20 17:31:04,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 186 transitions, 1993 flow [2024-06-20 17:31:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:04,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 17:31:04,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 17:31:04,671 INFO L175 Difference]: Start difference. First operand has 203 places, 159 transitions, 1539 flow. Second operand 9 states and 145 transitions. [2024-06-20 17:31:04,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 186 transitions, 1993 flow [2024-06-20 17:31:05,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 186 transitions, 1876 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-20 17:31:05,057 INFO L231 Difference]: Finished difference. Result has 192 places, 155 transitions, 1502 flow [2024-06-20 17:31:05,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1502, PETRI_PLACES=192, PETRI_TRANSITIONS=155} [2024-06-20 17:31:05,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-20 17:31:05,057 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 155 transitions, 1502 flow [2024-06-20 17:31:05,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:05,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:05,057 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, 1, 1, 1] [2024-06-20 17:31:05,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:31:05,057 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:05,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2129330781, now seen corresponding path program 9 times [2024-06-20 17:31:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580530546] [2024-06-20 17:31:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580530546] [2024-06-20 17:31:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580530546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404346806] [2024-06-20 17:31:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:09,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:09,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:09,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 155 transitions, 1502 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:09,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:09,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:10,674 INFO L124 PetriNetUnfolderBase]: 2032/3448 cut-off events. [2024-06-20 17:31:10,674 INFO L125 PetriNetUnfolderBase]: For 277013/277013 co-relation queries the response was YES. [2024-06-20 17:31:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 3448 events. 2032/3448 cut-off events. For 277013/277013 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20510 event pairs, 665 based on Foata normal form. 36/3479 useless extension candidates. Maximal degree in co-relation 19321. Up to 2507 conditions per place. [2024-06-20 17:31:10,703 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 47 changer transitions 28/186 dead transitions. [2024-06-20 17:31:10,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 186 transitions, 1984 flow [2024-06-20 17:31:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:31:10,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 17:31:10,704 INFO L175 Difference]: Start difference. First operand has 192 places, 155 transitions, 1502 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:31:10,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 186 transitions, 1984 flow [2024-06-20 17:31:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 186 transitions, 1870 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:10,978 INFO L231 Difference]: Finished difference. Result has 189 places, 146 transitions, 1411 flow [2024-06-20 17:31:10,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=189, PETRI_TRANSITIONS=146} [2024-06-20 17:31:10,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 17:31:10,978 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 146 transitions, 1411 flow [2024-06-20 17:31:10,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:10,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:10,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:31:10,978 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:10,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1687666115, now seen corresponding path program 10 times [2024-06-20 17:31:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821285521] [2024-06-20 17:31:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:14,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:14,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821285521] [2024-06-20 17:31:14,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821285521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:14,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:14,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775843849] [2024-06-20 17:31:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:14,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:14,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:14,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:14,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 146 transitions, 1411 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:14,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:14,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:16,231 INFO L124 PetriNetUnfolderBase]: 2026/3464 cut-off events. [2024-06-20 17:31:16,232 INFO L125 PetriNetUnfolderBase]: For 290091/290091 co-relation queries the response was YES. [2024-06-20 17:31:16,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20598 conditions, 3464 events. 2026/3464 cut-off events. For 290091/290091 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20860 event pairs, 639 based on Foata normal form. 24/3483 useless extension candidates. Maximal degree in co-relation 20511. Up to 2265 conditions per place. [2024-06-20 17:31:16,260 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 48 changer transitions 15/178 dead transitions. [2024-06-20 17:31:16,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 178 transitions, 1995 flow [2024-06-20 17:31:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:31:16,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 17:31:16,269 INFO L175 Difference]: Start difference. First operand has 189 places, 146 transitions, 1411 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:31:16,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 178 transitions, 1995 flow [2024-06-20 17:31:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 178 transitions, 1889 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:31:16,551 INFO L231 Difference]: Finished difference. Result has 185 places, 138 transitions, 1345 flow [2024-06-20 17:31:16,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1345, PETRI_PLACES=185, PETRI_TRANSITIONS=138} [2024-06-20 17:31:16,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-20 17:31:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 138 transitions, 1345 flow [2024-06-20 17:31:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:16,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:16,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:16,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:31:16,552 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:16,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1691535907, now seen corresponding path program 11 times [2024-06-20 17:31:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:16,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150232827] [2024-06-20 17:31:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150232827] [2024-06-20 17:31:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150232827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:20,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:20,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:20,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273242031] [2024-06-20 17:31:20,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:20,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:20,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 17:31:20,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 138 transitions, 1345 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:20,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:20,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 17:31:20,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:21,729 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-20 17:31:21,729 INFO L125 PetriNetUnfolderBase]: For 229413/229413 co-relation queries the response was YES. [2024-06-20 17:31:21,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 3118 events. 1816/3118 cut-off events. For 229413/229413 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18294 event pairs, 615 based on Foata normal form. 24/3137 useless extension candidates. Maximal degree in co-relation 17699. Up to 2265 conditions per place. [2024-06-20 17:31:21,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 33 changer transitions 43/164 dead transitions. [2024-06-20 17:31:21,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 164 transitions, 1749 flow [2024-06-20 17:31:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 17:31:21,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 17:31:21,753 INFO L175 Difference]: Start difference. First operand has 185 places, 138 transitions, 1345 flow. Second operand 9 states and 140 transitions. [2024-06-20 17:31:21,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 164 transitions, 1749 flow [2024-06-20 17:31:21,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 164 transitions, 1644 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 17:31:21,938 INFO L231 Difference]: Finished difference. Result has 178 places, 116 transitions, 1117 flow [2024-06-20 17:31:21,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1117, PETRI_PLACES=178, PETRI_TRANSITIONS=116} [2024-06-20 17:31:21,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 17:31:21,938 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 116 transitions, 1117 flow [2024-06-20 17:31:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:21,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:21,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:31:21,939 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:21,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1541701643, now seen corresponding path program 12 times [2024-06-20 17:31:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:21,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674711478] [2024-06-20 17:31:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:21,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15