./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe027_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe027_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:51:49,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:51:49,484 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:51:49,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:51:49,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:51:49,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:51:49,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:51:49,521 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:51:49,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:51:49,524 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:51:49,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:51:49,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:51:49,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:51:49,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:51:49,533 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:51:49,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:51:49,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:51:49,534 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:51:49,534 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:51:49,534 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:51:49,535 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:51:49,535 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:51:49,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:51:49,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:51:49,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:51:49,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:51:49,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:51:49,537 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:51:49,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:51:49,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:51:49,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:51:49,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:51:49,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:51:49,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:51:49,539 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:51:49,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:51:49,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:51:49,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:51:49,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:51:49,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:51:49,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:51:49,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:51:49,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:51:49,540 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:51:49,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:51:49,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:51:49,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:51:49,759 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:51:49,759 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:51:49,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-21 17:51:50,842 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:51:51,052 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:51:51,053 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-21 17:51:51,078 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f64608c1/d6e1f4cdd9614b6c903e2cde5eeca050/FLAG07e6b5d6f [2024-06-21 17:51:51,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f64608c1/d6e1f4cdd9614b6c903e2cde5eeca050 [2024-06-21 17:51:51,093 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:51:51,094 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:51:51,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe027_power.oepc.yml/witness.yml [2024-06-21 17:51:51,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:51:51,347 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:51:51,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:51:51,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:51:51,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:51:51,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:51:51" (1/2) ... [2024-06-21 17:51:51,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d5c154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:51, skipping insertion in model container [2024-06-21 17:51:51,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:51:51" (1/2) ... [2024-06-21 17:51:51,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65e285b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:51:51, skipping insertion in model container [2024-06-21 17:51:51,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:51" (2/2) ... [2024-06-21 17:51:51,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35d5c154 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:51, skipping insertion in model container [2024-06-21 17:51:51,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:51" (2/2) ... [2024-06-21 17:51:51,355 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:51:51,512 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:51:51,514 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:51:51,514 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:51:51,514 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:51:51,514 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-21 17:51:51,515 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:51:51,515 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 17:51:51,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:51:51,862 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:51:51,876 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:51:51,991 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:51:52,020 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:51:52,020 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52 WrapperNode [2024-06-21 17:51:52,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:51:52,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:51:52,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:51:52,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:51:52,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,103 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 198 [2024-06-21 17:51:52,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:51:52,104 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:51:52,104 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:51:52,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:51:52,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,119 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,180 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-21 17:51:52,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,238 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:51:52,258 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:51:52,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:51:52,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:51:52,259 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (1/1) ... [2024-06-21 17:51:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:51:52,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:51:52,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:51:52,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:51:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:51:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:51:52,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:51:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:51:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:51:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:51:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:51:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:51:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:51:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:51:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:51:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:51:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:51:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:51:52,331 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:51:52,479 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:51:52,480 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:51:53,007 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:51:53,008 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:51:53,301 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:51:53,302 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:51:53,302 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:51:53 BoogieIcfgContainer [2024-06-21 17:51:53,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:51:53,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:51:53,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:51:53,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:51:53,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:51:51" (1/4) ... [2024-06-21 17:51:53,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70755be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:51:53, skipping insertion in model container [2024-06-21 17:51:53,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:51:51" (2/4) ... [2024-06-21 17:51:53,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70755be9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:51:53, skipping insertion in model container [2024-06-21 17:51:53,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:51:52" (3/4) ... [2024-06-21 17:51:53,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70755be9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:51:53, skipping insertion in model container [2024-06-21 17:51:53,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:51:53" (4/4) ... [2024-06-21 17:51:53,309 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-21 17:51:53,324 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:51:53,324 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:51:53,324 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:51:53,385 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:51:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:51:53,441 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 17:51:53,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:51:53,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:51:53,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:51:53,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 17:51:53,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:51:53,459 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;@46b3d2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:51:53,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:51:53,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:51:53,464 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:51:53,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:51:53,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:53,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:51:53,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:51:53,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash 768987070, now seen corresponding path program 1 times [2024-06-21 17:51:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218761089] [2024-06-21 17:51:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:55,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:55,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218761089] [2024-06-21 17:51:55,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218761089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:55,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:55,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:51:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656292308] [2024-06-21 17:51:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:51:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:51:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:51:55,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 17:51:55,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:55,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 17:51:55,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:56,477 INFO L124 PetriNetUnfolderBase]: 3447/4934 cut-off events. [2024-06-21 17:51:56,477 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-21 17:51:56,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 4934 events. 3447/4934 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26307 event pairs, 2102 based on Foata normal form. 2/4844 useless extension candidates. Maximal degree in co-relation 9919. Up to 4797 conditions per place. [2024-06-21 17:51:56,508 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-21 17:51:56,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 241 flow [2024-06-21 17:51:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:51:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:51:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-21 17:51:56,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 17:51:56,523 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-21 17:51:56,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 241 flow [2024-06-21 17:51:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:56,527 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 17:51:56,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 17:51:56,531 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 17:51:56,531 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 17:51:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:56,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:56,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:56,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:51:56,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:51:56,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 262241565, now seen corresponding path program 1 times [2024-06-21 17:51:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927532687] [2024-06-21 17:51:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:56,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927532687] [2024-06-21 17:51:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927532687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:51:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784300129] [2024-06-21 17:51:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:51:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:51:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:51:58,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 17:51:58,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-21 17:51:58,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:58,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 17:51:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:00,058 INFO L124 PetriNetUnfolderBase]: 3430/4977 cut-off events. [2024-06-21 17:52:00,058 INFO L125 PetriNetUnfolderBase]: For 1039/1067 co-relation queries the response was YES. [2024-06-21 17:52:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11562 conditions, 4977 events. 3430/4977 cut-off events. For 1039/1067 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26759 event pairs, 1986 based on Foata normal form. 6/4964 useless extension candidates. Maximal degree in co-relation 11550. Up to 4730 conditions per place. [2024-06-21 17:52:00,080 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-06-21 17:52:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 349 flow [2024-06-21 17:52:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:52:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:52:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-21 17:52:00,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 17:52:00,082 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 128 transitions. [2024-06-21 17:52:00,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 349 flow [2024-06-21 17:52:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:52:00,084 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 17:52:00,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 17:52:00,085 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 17:52:00,085 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 17:52:00,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-21 17:52:00,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:00,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:00,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:52:00,086 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:00,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash -105677146, now seen corresponding path program 1 times [2024-06-21 17:52:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:00,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200247026] [2024-06-21 17:52:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:00,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:02,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:02,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200247026] [2024-06-21 17:52:02,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200247026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:02,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:52:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801394526] [2024-06-21 17:52:02,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:02,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:52:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:52:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:52:03,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:52:03,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:03,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:03,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:52:03,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:04,638 INFO L124 PetriNetUnfolderBase]: 4421/6343 cut-off events. [2024-06-21 17:52:04,639 INFO L125 PetriNetUnfolderBase]: For 3844/3904 co-relation queries the response was YES. [2024-06-21 17:52:04,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16595 conditions, 6343 events. 4421/6343 cut-off events. For 3844/3904 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33932 event pairs, 1887 based on Foata normal form. 24/6347 useless extension candidates. Maximal degree in co-relation 16581. Up to 5862 conditions per place. [2024-06-21 17:52:04,686 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-21 17:52:04,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 111 transitions, 552 flow [2024-06-21 17:52:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-21 17:52:04,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 17:52:04,689 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 184 transitions. [2024-06-21 17:52:04,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 111 transitions, 552 flow [2024-06-21 17:52:04,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 524 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 17:52:04,693 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 231 flow [2024-06-21 17:52:04,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 17:52:04,694 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 17:52:04,694 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 231 flow [2024-06-21 17:52:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:04,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:52:04,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:04,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1475752419, now seen corresponding path program 1 times [2024-06-21 17:52:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099223223] [2024-06-21 17:52:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:06,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:06,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099223223] [2024-06-21 17:52:06,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099223223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:06,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:06,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:52:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191762129] [2024-06-21 17:52:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:06,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:52:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:52:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:52:06,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:06,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-21 17:52:06,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:06,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:08,367 INFO L124 PetriNetUnfolderBase]: 5539/7855 cut-off events. [2024-06-21 17:52:08,368 INFO L125 PetriNetUnfolderBase]: For 8059/8059 co-relation queries the response was YES. [2024-06-21 17:52:08,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22197 conditions, 7855 events. 5539/7855 cut-off events. For 8059/8059 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41383 event pairs, 2800 based on Foata normal form. 3/7855 useless extension candidates. Maximal degree in co-relation 22180. Up to 7625 conditions per place. [2024-06-21 17:52:08,400 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-21 17:52:08,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 480 flow [2024-06-21 17:52:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:52:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:52:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 17:52:08,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 17:52:08,402 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 231 flow. Second operand 5 states and 122 transitions. [2024-06-21 17:52:08,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 480 flow [2024-06-21 17:52:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:08,407 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 290 flow [2024-06-21 17:52:08,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-21 17:52:08,408 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 17:52:08,408 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 290 flow [2024-06-21 17:52:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2024-06-21 17:52:08,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:08,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:08,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:52:08,409 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:08,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:08,409 INFO L85 PathProgramCache]: Analyzing trace with hash -15968452, now seen corresponding path program 1 times [2024-06-21 17:52:08,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:08,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796133428] [2024-06-21 17:52:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:08,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:11,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796133428] [2024-06-21 17:52:11,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796133428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:11,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:11,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033719585] [2024-06-21 17:52:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:11,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:11,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:11,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:11,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:11,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:11,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:11,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:11,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:13,421 INFO L124 PetriNetUnfolderBase]: 5566/7887 cut-off events. [2024-06-21 17:52:13,421 INFO L125 PetriNetUnfolderBase]: For 11592/11592 co-relation queries the response was YES. [2024-06-21 17:52:13,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24329 conditions, 7887 events. 5566/7887 cut-off events. For 11592/11592 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41581 event pairs, 2657 based on Foata normal form. 3/7885 useless extension candidates. Maximal degree in co-relation 24309. Up to 7594 conditions per place. [2024-06-21 17:52:13,457 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 85 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-21 17:52:13,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 112 transitions, 675 flow [2024-06-21 17:52:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 17:52:13,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-21 17:52:13,461 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 290 flow. Second operand 6 states and 155 transitions. [2024-06-21 17:52:13,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 112 transitions, 675 flow [2024-06-21 17:52:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 665 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 17:52:13,472 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 413 flow [2024-06-21 17:52:13,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-21 17:52:13,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 17:52:13,474 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 413 flow [2024-06-21 17:52:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:13,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:13,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:13,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:52:13,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:13,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash -5641732, now seen corresponding path program 2 times [2024-06-21 17:52:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763798962] [2024-06-21 17:52:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:16,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:16,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763798962] [2024-06-21 17:52:16,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763798962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:16,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:16,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480650991] [2024-06-21 17:52:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:16,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:16,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:16,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:16,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:16,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:16,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:18,000 INFO L124 PetriNetUnfolderBase]: 5557/7885 cut-off events. [2024-06-21 17:52:18,001 INFO L125 PetriNetUnfolderBase]: For 16948/16961 co-relation queries the response was YES. [2024-06-21 17:52:18,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26600 conditions, 7885 events. 5557/7885 cut-off events. For 16948/16961 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41518 event pairs, 2675 based on Foata normal form. 13/7893 useless extension candidates. Maximal degree in co-relation 26576. Up to 7585 conditions per place. [2024-06-21 17:52:18,041 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 78 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-21 17:52:18,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 106 transitions, 694 flow [2024-06-21 17:52:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 17:52:18,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 17:52:18,043 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 413 flow. Second operand 6 states and 148 transitions. [2024-06-21 17:52:18,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 106 transitions, 694 flow [2024-06-21 17:52:18,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 648 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:18,064 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 427 flow [2024-06-21 17:52:18,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=427, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 17:52:18,064 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 17:52:18,065 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 427 flow [2024-06-21 17:52:18,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:18,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:18,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:18,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:52:18,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:18,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -858823556, now seen corresponding path program 1 times [2024-06-21 17:52:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:18,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527746759] [2024-06-21 17:52:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:18,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:19,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527746759] [2024-06-21 17:52:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527746759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:19,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:52:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697810662] [2024-06-21 17:52:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:19,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:52:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:19,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:52:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:52:19,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:19,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:19,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:19,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:19,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:21,762 INFO L124 PetriNetUnfolderBase]: 5542/7863 cut-off events. [2024-06-21 17:52:21,762 INFO L125 PetriNetUnfolderBase]: For 19247/19247 co-relation queries the response was YES. [2024-06-21 17:52:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26763 conditions, 7863 events. 5542/7863 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41360 event pairs, 2523 based on Foata normal form. 6/7866 useless extension candidates. Maximal degree in co-relation 26738. Up to 7591 conditions per place. [2024-06-21 17:52:21,798 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-21 17:52:21,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 733 flow [2024-06-21 17:52:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:52:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:52:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 17:52:21,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 17:52:21,800 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 427 flow. Second operand 6 states and 146 transitions. [2024-06-21 17:52:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 733 flow [2024-06-21 17:52:21,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 700 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:52:21,812 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 458 flow [2024-06-21 17:52:21,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 17:52:21,812 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 17:52:21,813 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 458 flow [2024-06-21 17:52:21,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:21,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:21,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:21,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:52:21,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:21,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1031107476, now seen corresponding path program 1 times [2024-06-21 17:52:21,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:21,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964350695] [2024-06-21 17:52:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:21,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:24,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964350695] [2024-06-21 17:52:24,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964350695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:24,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:24,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55774117] [2024-06-21 17:52:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:24,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:24,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:24,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:24,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:24,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:24,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:24,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:24,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:27,116 INFO L124 PetriNetUnfolderBase]: 5607/7986 cut-off events. [2024-06-21 17:52:27,116 INFO L125 PetriNetUnfolderBase]: For 24976/24976 co-relation queries the response was YES. [2024-06-21 17:52:27,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28619 conditions, 7986 events. 5607/7986 cut-off events. For 24976/24976 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42746 event pairs, 2297 based on Foata normal form. 7/7989 useless extension candidates. Maximal degree in co-relation 28592. Up to 7544 conditions per place. [2024-06-21 17:52:27,198 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 25 changer transitions 0/136 dead transitions. [2024-06-21 17:52:27,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 136 transitions, 884 flow [2024-06-21 17:52:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 17:52:27,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-21 17:52:27,201 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 458 flow. Second operand 7 states and 186 transitions. [2024-06-21 17:52:27,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 136 transitions, 884 flow [2024-06-21 17:52:27,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 846 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:27,215 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 528 flow [2024-06-21 17:52:27,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-21 17:52:27,216 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 17:52:27,216 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 528 flow [2024-06-21 17:52:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:27,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:27,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:27,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:52:27,217 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:27,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1031102826, now seen corresponding path program 2 times [2024-06-21 17:52:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:27,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724188212] [2024-06-21 17:52:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:30,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724188212] [2024-06-21 17:52:30,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724188212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:30,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:30,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:30,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346352337] [2024-06-21 17:52:30,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:30,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:30,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:30,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:30,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:30,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:30,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:32,301 INFO L124 PetriNetUnfolderBase]: 5634/8008 cut-off events. [2024-06-21 17:52:32,301 INFO L125 PetriNetUnfolderBase]: For 32173/32173 co-relation queries the response was YES. [2024-06-21 17:52:32,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31347 conditions, 8008 events. 5634/8008 cut-off events. For 32173/32173 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42405 event pairs, 2484 based on Foata normal form. 3/8006 useless extension candidates. Maximal degree in co-relation 31319. Up to 7601 conditions per place. [2024-06-21 17:52:32,343 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 103 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-21 17:52:32,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 144 transitions, 1094 flow [2024-06-21 17:52:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:52:32,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 17:52:32,345 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 528 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:52:32,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 144 transitions, 1094 flow [2024-06-21 17:52:32,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 144 transitions, 998 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:32,362 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 686 flow [2024-06-21 17:52:32,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=686, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-21 17:52:32,363 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-21 17:52:32,363 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 686 flow [2024-06-21 17:52:32,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:32,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:32,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:32,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:52:32,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:32,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 336181492, now seen corresponding path program 3 times [2024-06-21 17:52:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905652374] [2024-06-21 17:52:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:35,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905652374] [2024-06-21 17:52:35,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905652374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:35,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:35,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292174678] [2024-06-21 17:52:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:35,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:35,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 686 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:35,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:35,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:35,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:37,731 INFO L124 PetriNetUnfolderBase]: 5625/7999 cut-off events. [2024-06-21 17:52:37,731 INFO L125 PetriNetUnfolderBase]: For 41308/41308 co-relation queries the response was YES. [2024-06-21 17:52:37,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33415 conditions, 7999 events. 5625/7999 cut-off events. For 41308/41308 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42223 event pairs, 2501 based on Foata normal form. 3/7994 useless extension candidates. Maximal degree in co-relation 33384. Up to 7592 conditions per place. [2024-06-21 17:52:37,771 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 96 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-21 17:52:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 138 transitions, 1057 flow [2024-06-21 17:52:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 17:52:37,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 17:52:37,773 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 686 flow. Second operand 7 states and 174 transitions. [2024-06-21 17:52:37,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 138 transitions, 1057 flow [2024-06-21 17:52:37,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 993 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:52:37,799 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 714 flow [2024-06-21 17:52:37,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=714, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-21 17:52:37,800 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-21 17:52:37,800 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 714 flow [2024-06-21 17:52:37,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:37,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:37,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:37,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:52:37,801 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:37,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:37,802 INFO L85 PathProgramCache]: Analyzing trace with hash 544731709, now seen corresponding path program 1 times [2024-06-21 17:52:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:37,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658265680] [2024-06-21 17:52:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:37,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:40,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658265680] [2024-06-21 17:52:40,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658265680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:40,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:40,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811992390] [2024-06-21 17:52:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:40,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:40,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:40,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 714 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:40,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:40,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:40,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:42,981 INFO L124 PetriNetUnfolderBase]: 5958/8466 cut-off events. [2024-06-21 17:52:42,982 INFO L125 PetriNetUnfolderBase]: For 49000/49000 co-relation queries the response was YES. [2024-06-21 17:52:42,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36263 conditions, 8466 events. 5958/8466 cut-off events. For 49000/49000 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44672 event pairs, 2504 based on Foata normal form. 18/8479 useless extension candidates. Maximal degree in co-relation 36230. Up to 7924 conditions per place. [2024-06-21 17:52:43,028 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 138 selfloop transitions, 54 changer transitions 0/199 dead transitions. [2024-06-21 17:52:43,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 1616 flow [2024-06-21 17:52:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:52:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:52:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-21 17:52:43,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597902097902098 [2024-06-21 17:52:43,032 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 714 flow. Second operand 11 states and 263 transitions. [2024-06-21 17:52:43,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 1616 flow [2024-06-21 17:52:43,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 1530 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:43,076 INFO L231 Difference]: Finished difference. Result has 99 places, 134 transitions, 1116 flow [2024-06-21 17:52:43,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=99, PETRI_TRANSITIONS=134} [2024-06-21 17:52:43,077 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 17:52:43,077 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 134 transitions, 1116 flow [2024-06-21 17:52:43,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:43,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:43,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:43,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:52:43,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:43,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:43,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1834230235, now seen corresponding path program 2 times [2024-06-21 17:52:43,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:43,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717337813] [2024-06-21 17:52:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:43,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:46,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717337813] [2024-06-21 17:52:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717337813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:46,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006960595] [2024-06-21 17:52:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:46,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:46,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 1116 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:46,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:46,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:46,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:48,233 INFO L124 PetriNetUnfolderBase]: 6002/8534 cut-off events. [2024-06-21 17:52:48,233 INFO L125 PetriNetUnfolderBase]: For 66184/66184 co-relation queries the response was YES. [2024-06-21 17:52:48,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 8534 events. 6002/8534 cut-off events. For 66184/66184 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45202 event pairs, 2470 based on Foata normal form. 6/8535 useless extension candidates. Maximal degree in co-relation 40074. Up to 8063 conditions per place. [2024-06-21 17:52:48,279 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 136 selfloop transitions, 42 changer transitions 0/185 dead transitions. [2024-06-21 17:52:48,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 185 transitions, 1670 flow [2024-06-21 17:52:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:52:48,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:52:48,282 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 1116 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:52:48,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 185 transitions, 1670 flow [2024-06-21 17:52:48,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 185 transitions, 1612 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 17:52:48,343 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1226 flow [2024-06-21 17:52:48,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-21 17:52:48,344 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-21 17:52:48,344 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1226 flow [2024-06-21 17:52:48,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:48,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:48,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:52:48,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:48,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1831698813, now seen corresponding path program 3 times [2024-06-21 17:52:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896553224] [2024-06-21 17:52:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:51,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:51,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896553224] [2024-06-21 17:52:51,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896553224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:51,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002422278] [2024-06-21 17:52:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:51,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:51,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1226 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:51,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:51,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:51,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:53,510 INFO L124 PetriNetUnfolderBase]: 6046/8608 cut-off events. [2024-06-21 17:52:53,511 INFO L125 PetriNetUnfolderBase]: For 77022/77035 co-relation queries the response was YES. [2024-06-21 17:52:53,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42199 conditions, 8608 events. 6046/8608 cut-off events. For 77022/77035 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45590 event pairs, 2490 based on Foata normal form. 16/8617 useless extension candidates. Maximal degree in co-relation 42158. Up to 8165 conditions per place. [2024-06-21 17:52:53,565 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2024-06-21 17:52:53,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 1766 flow [2024-06-21 17:52:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 17:52:53,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 17:52:53,567 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1226 flow. Second operand 7 states and 172 transitions. [2024-06-21 17:52:53,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 1766 flow [2024-06-21 17:52:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1652 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:53,637 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1253 flow [2024-06-21 17:52:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1253, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-21 17:52:53,638 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 17:52:53,638 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1253 flow [2024-06-21 17:52:53,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:53,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:53,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:52:53,638 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:53,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash -695680997, now seen corresponding path program 4 times [2024-06-21 17:52:53,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:53,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008441611] [2024-06-21 17:52:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:56,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008441611] [2024-06-21 17:52:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008441611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:56,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:52:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747089897] [2024-06-21 17:52:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:52:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:52:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:52:56,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:52:56,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1253 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:56,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:56,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:52:56,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:58,953 INFO L124 PetriNetUnfolderBase]: 6031/8595 cut-off events. [2024-06-21 17:52:58,953 INFO L125 PetriNetUnfolderBase]: For 87165/87178 co-relation queries the response was YES. [2024-06-21 17:52:58,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43340 conditions, 8595 events. 6031/8595 cut-off events. For 87165/87178 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 45687 event pairs, 2285 based on Foata normal form. 16/8604 useless extension candidates. Maximal degree in co-relation 43298. Up to 7974 conditions per place. [2024-06-21 17:52:59,001 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 132 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-21 17:52:59,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1799 flow [2024-06-21 17:52:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:52:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:52:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 17:52:59,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-21 17:52:59,003 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1253 flow. Second operand 7 states and 173 transitions. [2024-06-21 17:52:59,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1799 flow [2024-06-21 17:52:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 189 transitions, 1668 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:59,058 INFO L231 Difference]: Finished difference. Result has 108 places, 145 transitions, 1288 flow [2024-06-21 17:52:59,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1288, PETRI_PLACES=108, PETRI_TRANSITIONS=145} [2024-06-21 17:52:59,059 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 17:52:59,059 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 145 transitions, 1288 flow [2024-06-21 17:52:59,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:59,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:59,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:52:59,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:52:59,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1497248609, now seen corresponding path program 1 times [2024-06-21 17:52:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:59,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091771012] [2024-06-21 17:52:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091771012] [2024-06-21 17:53:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091771012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:02,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:02,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119713900] [2024-06-21 17:53:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:02,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 145 transitions, 1288 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:02,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:02,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:02,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:05,333 INFO L124 PetriNetUnfolderBase]: 7473/10766 cut-off events. [2024-06-21 17:53:05,333 INFO L125 PetriNetUnfolderBase]: For 130456/130456 co-relation queries the response was YES. [2024-06-21 17:53:05,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 10766 events. 7473/10766 cut-off events. For 130456/130456 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61237 event pairs, 2129 based on Foata normal form. 78/10840 useless extension candidates. Maximal degree in co-relation 55367. Up to 8230 conditions per place. [2024-06-21 17:53:05,395 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 192 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-21 17:53:05,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 239 transitions, 2224 flow [2024-06-21 17:53:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-21 17:53:05,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-06-21 17:53:05,397 INFO L175 Difference]: Start difference. First operand has 108 places, 145 transitions, 1288 flow. Second operand 9 states and 248 transitions. [2024-06-21 17:53:05,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 239 transitions, 2224 flow [2024-06-21 17:53:05,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 239 transitions, 2084 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:53:05,509 INFO L231 Difference]: Finished difference. Result has 113 places, 151 transitions, 1357 flow [2024-06-21 17:53:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=113, PETRI_TRANSITIONS=151} [2024-06-21 17:53:05,510 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-21 17:53:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 151 transitions, 1357 flow [2024-06-21 17:53:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:05,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:53:05,511 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1243199403, now seen corresponding path program 2 times [2024-06-21 17:53:05,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:05,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406513240] [2024-06-21 17:53:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:08,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:08,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406513240] [2024-06-21 17:53:08,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406513240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:08,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:08,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:08,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915460258] [2024-06-21 17:53:08,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:08,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:08,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:09,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:09,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 151 transitions, 1357 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:09,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:09,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:09,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:11,545 INFO L124 PetriNetUnfolderBase]: 7247/10474 cut-off events. [2024-06-21 17:53:11,545 INFO L125 PetriNetUnfolderBase]: For 137805/137805 co-relation queries the response was YES. [2024-06-21 17:53:11,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54164 conditions, 10474 events. 7247/10474 cut-off events. For 137805/137805 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59667 event pairs, 2633 based on Foata normal form. 92/10562 useless extension candidates. Maximal degree in co-relation 54119. Up to 9080 conditions per place. [2024-06-21 17:53:11,620 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 178 selfloop transitions, 36 changer transitions 0/221 dead transitions. [2024-06-21 17:53:11,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 221 transitions, 2024 flow [2024-06-21 17:53:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 17:53:11,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-21 17:53:11,622 INFO L175 Difference]: Start difference. First operand has 113 places, 151 transitions, 1357 flow. Second operand 8 states and 215 transitions. [2024-06-21 17:53:11,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 221 transitions, 2024 flow [2024-06-21 17:53:11,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 221 transitions, 1940 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:53:11,798 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1381 flow [2024-06-21 17:53:11,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-21 17:53:11,799 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-21 17:53:11,800 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1381 flow [2024-06-21 17:53:11,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:11,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:11,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:11,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:53:11,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:11,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1247668053, now seen corresponding path program 3 times [2024-06-21 17:53:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:11,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495038635] [2024-06-21 17:53:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:11,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495038635] [2024-06-21 17:53:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495038635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:15,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633518464] [2024-06-21 17:53:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:15,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:15,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:15,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:15,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:15,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:15,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:15,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:18,053 INFO L124 PetriNetUnfolderBase]: 7532/10877 cut-off events. [2024-06-21 17:53:18,054 INFO L125 PetriNetUnfolderBase]: For 137379/137382 co-relation queries the response was YES. [2024-06-21 17:53:18,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56458 conditions, 10877 events. 7532/10877 cut-off events. For 137379/137382 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 62279 event pairs, 2784 based on Foata normal form. 24/10888 useless extension candidates. Maximal degree in co-relation 56411. Up to 10000 conditions per place. [2024-06-21 17:53:18,128 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 157 selfloop transitions, 70 changer transitions 0/234 dead transitions. [2024-06-21 17:53:18,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 234 transitions, 2333 flow [2024-06-21 17:53:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 17:53:18,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-06-21 17:53:18,137 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1381 flow. Second operand 9 states and 218 transitions. [2024-06-21 17:53:18,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 234 transitions, 2333 flow [2024-06-21 17:53:18,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2242 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:18,263 INFO L231 Difference]: Finished difference. Result has 123 places, 176 transitions, 1818 flow [2024-06-21 17:53:18,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1818, PETRI_PLACES=123, PETRI_TRANSITIONS=176} [2024-06-21 17:53:18,264 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-21 17:53:18,265 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 176 transitions, 1818 flow [2024-06-21 17:53:18,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:18,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:18,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:18,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:53:18,265 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:18,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:18,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1026563607, now seen corresponding path program 1 times [2024-06-21 17:53:18,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:18,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039848578] [2024-06-21 17:53:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:18,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039848578] [2024-06-21 17:53:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039848578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:22,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:22,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411566562] [2024-06-21 17:53:22,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:22,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:22,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:22,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 176 transitions, 1818 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:22,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:22,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:22,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:25,276 INFO L124 PetriNetUnfolderBase]: 7854/11385 cut-off events. [2024-06-21 17:53:25,276 INFO L125 PetriNetUnfolderBase]: For 161989/161989 co-relation queries the response was YES. [2024-06-21 17:53:25,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61281 conditions, 11385 events. 7854/11385 cut-off events. For 161989/161989 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 65850 event pairs, 2781 based on Foata normal form. 18/11398 useless extension candidates. Maximal degree in co-relation 61229. Up to 9772 conditions per place. [2024-06-21 17:53:25,351 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 159 selfloop transitions, 79 changer transitions 0/245 dead transitions. [2024-06-21 17:53:25,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 245 transitions, 2725 flow [2024-06-21 17:53:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 17:53:25,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-21 17:53:25,354 INFO L175 Difference]: Start difference. First operand has 123 places, 176 transitions, 1818 flow. Second operand 8 states and 209 transitions. [2024-06-21 17:53:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 245 transitions, 2725 flow [2024-06-21 17:53:25,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 245 transitions, 2642 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 17:53:25,557 INFO L231 Difference]: Finished difference. Result has 130 places, 181 transitions, 2051 flow [2024-06-21 17:53:25,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2051, PETRI_PLACES=130, PETRI_TRANSITIONS=181} [2024-06-21 17:53:25,558 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 17:53:25,558 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 181 transitions, 2051 flow [2024-06-21 17:53:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:25,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:25,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:53:25,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:25,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash 947310429, now seen corresponding path program 4 times [2024-06-21 17:53:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380130922] [2024-06-21 17:53:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380130922] [2024-06-21 17:53:29,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380130922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:29,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:29,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:29,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247443682] [2024-06-21 17:53:29,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:29,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:29,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:29,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:29,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:29,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:29,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 181 transitions, 2051 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:29,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:29,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:29,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:32,045 INFO L124 PetriNetUnfolderBase]: 7951/11555 cut-off events. [2024-06-21 17:53:32,045 INFO L125 PetriNetUnfolderBase]: For 181782/181784 co-relation queries the response was YES. [2024-06-21 17:53:32,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63603 conditions, 11555 events. 7951/11555 cut-off events. For 181782/181784 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67186 event pairs, 2858 based on Foata normal form. 24/11566 useless extension candidates. Maximal degree in co-relation 63548. Up to 10637 conditions per place. [2024-06-21 17:53:32,119 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 162 selfloop transitions, 69 changer transitions 0/238 dead transitions. [2024-06-21 17:53:32,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 238 transitions, 2749 flow [2024-06-21 17:53:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 17:53:32,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:53:32,121 INFO L175 Difference]: Start difference. First operand has 130 places, 181 transitions, 2051 flow. Second operand 8 states and 200 transitions. [2024-06-21 17:53:32,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 238 transitions, 2749 flow [2024-06-21 17:53:32,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 238 transitions, 2638 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:53:32,298 INFO L231 Difference]: Finished difference. Result has 134 places, 183 transitions, 2146 flow [2024-06-21 17:53:32,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2146, PETRI_PLACES=134, PETRI_TRANSITIONS=183} [2024-06-21 17:53:32,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 17:53:32,298 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 183 transitions, 2146 flow [2024-06-21 17:53:32,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:32,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:32,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:32,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:53:32,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:32,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1192202741, now seen corresponding path program 2 times [2024-06-21 17:53:32,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:32,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654616591] [2024-06-21 17:53:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:32,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654616591] [2024-06-21 17:53:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654616591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:35,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:35,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920118144] [2024-06-21 17:53:35,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:35,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:35,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 183 transitions, 2146 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:35,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:35,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:35,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:38,561 INFO L124 PetriNetUnfolderBase]: 8063/11747 cut-off events. [2024-06-21 17:53:38,561 INFO L125 PetriNetUnfolderBase]: For 197443/197445 co-relation queries the response was YES. [2024-06-21 17:53:38,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65851 conditions, 11747 events. 8063/11747 cut-off events. For 197443/197445 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 68649 event pairs, 2858 based on Foata normal form. 18/11752 useless extension candidates. Maximal degree in co-relation 65794. Up to 10619 conditions per place. [2024-06-21 17:53:38,645 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 165 selfloop transitions, 72 changer transitions 0/244 dead transitions. [2024-06-21 17:53:38,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 244 transitions, 2876 flow [2024-06-21 17:53:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 17:53:38,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-21 17:53:38,647 INFO L175 Difference]: Start difference. First operand has 134 places, 183 transitions, 2146 flow. Second operand 8 states and 203 transitions. [2024-06-21 17:53:38,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 244 transitions, 2876 flow [2024-06-21 17:53:38,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 244 transitions, 2710 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:38,841 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 2195 flow [2024-06-21 17:53:38,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2195, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-21 17:53:38,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-21 17:53:38,841 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 2195 flow [2024-06-21 17:53:38,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:38,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:38,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:53:38,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:38,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash -91273257, now seen corresponding path program 3 times [2024-06-21 17:53:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:38,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564398513] [2024-06-21 17:53:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564398513] [2024-06-21 17:53:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564398513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:42,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:42,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150584262] [2024-06-21 17:53:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:42,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:42,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:42,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:42,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 2195 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:42,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:42,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:45,179 INFO L124 PetriNetUnfolderBase]: 8024/11690 cut-off events. [2024-06-21 17:53:45,179 INFO L125 PetriNetUnfolderBase]: For 206452/206454 co-relation queries the response was YES. [2024-06-21 17:53:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65862 conditions, 11690 events. 8024/11690 cut-off events. For 206452/206454 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 67435 event pairs, 2543 based on Foata normal form. 18/11695 useless extension candidates. Maximal degree in co-relation 65804. Up to 9426 conditions per place. [2024-06-21 17:53:45,261 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 89 changer transitions 0/247 dead transitions. [2024-06-21 17:53:45,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 247 transitions, 3011 flow [2024-06-21 17:53:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 17:53:45,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 17:53:45,263 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 2195 flow. Second operand 8 states and 205 transitions. [2024-06-21 17:53:45,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 247 transitions, 3011 flow [2024-06-21 17:53:45,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 247 transitions, 2826 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:45,447 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 2263 flow [2024-06-21 17:53:45,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2263, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2024-06-21 17:53:45,448 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-21 17:53:45,448 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 2263 flow [2024-06-21 17:53:45,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:45,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:45,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:53:45,448 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -293369485, now seen corresponding path program 5 times [2024-06-21 17:53:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145939517] [2024-06-21 17:53:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145939517] [2024-06-21 17:53:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145939517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607979598] [2024-06-21 17:53:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:48,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:48,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 2263 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:48,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:48,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:48,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:51,217 INFO L124 PetriNetUnfolderBase]: 8244/12024 cut-off events. [2024-06-21 17:53:51,218 INFO L125 PetriNetUnfolderBase]: For 220731/220731 co-relation queries the response was YES. [2024-06-21 17:53:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68229 conditions, 12024 events. 8244/12024 cut-off events. For 220731/220731 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 70701 event pairs, 2852 based on Foata normal form. 24/12043 useless extension candidates. Maximal degree in co-relation 68170. Up to 10858 conditions per place. [2024-06-21 17:53:51,315 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 172 selfloop transitions, 100 changer transitions 0/279 dead transitions. [2024-06-21 17:53:51,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 279 transitions, 3326 flow [2024-06-21 17:53:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-21 17:53:51,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 17:53:51,317 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 2263 flow. Second operand 9 states and 231 transitions. [2024-06-21 17:53:51,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 279 transitions, 3326 flow [2024-06-21 17:53:51,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 279 transitions, 3033 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:51,641 INFO L231 Difference]: Finished difference. Result has 142 places, 215 transitions, 2590 flow [2024-06-21 17:53:51,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2590, PETRI_PLACES=142, PETRI_TRANSITIONS=215} [2024-06-21 17:53:51,641 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-21 17:53:51,642 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 215 transitions, 2590 flow [2024-06-21 17:53:51,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:51,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:51,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:51,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:53:51,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:51,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1169710274, now seen corresponding path program 1 times [2024-06-21 17:53:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023829698] [2024-06-21 17:53:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023829698] [2024-06-21 17:53:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023829698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:53,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:53,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:53:53,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500050402] [2024-06-21 17:53:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:53,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:53:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:53:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:53:53,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:53,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 215 transitions, 2590 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:53,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:53,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:53,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:56,127 INFO L124 PetriNetUnfolderBase]: 8282/12088 cut-off events. [2024-06-21 17:53:56,127 INFO L125 PetriNetUnfolderBase]: For 223839/223839 co-relation queries the response was YES. [2024-06-21 17:53:56,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68773 conditions, 12088 events. 8282/12088 cut-off events. For 223839/223839 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71165 event pairs, 3014 based on Foata normal form. 4/12086 useless extension candidates. Maximal degree in co-relation 68711. Up to 11532 conditions per place. [2024-06-21 17:53:56,209 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 225 selfloop transitions, 22 changer transitions 0/254 dead transitions. [2024-06-21 17:53:56,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 254 transitions, 3396 flow [2024-06-21 17:53:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:53:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:53:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 17:53:56,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:53:56,219 INFO L175 Difference]: Start difference. First operand has 142 places, 215 transitions, 2590 flow. Second operand 6 states and 147 transitions. [2024-06-21 17:53:56,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 254 transitions, 3396 flow [2024-06-21 17:53:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 254 transitions, 3239 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:53:56,489 INFO L231 Difference]: Finished difference. Result has 143 places, 223 transitions, 2622 flow [2024-06-21 17:53:56,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2622, PETRI_PLACES=143, PETRI_TRANSITIONS=223} [2024-06-21 17:53:56,490 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-21 17:53:56,490 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 223 transitions, 2622 flow [2024-06-21 17:53:56,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:56,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:56,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:56,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:53:56,491 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:53:56,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:56,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1079202498, now seen corresponding path program 2 times [2024-06-21 17:53:56,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734130671] [2024-06-21 17:53:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:58,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:58,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734130671] [2024-06-21 17:53:58,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734130671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:58,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:58,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:53:58,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073572935] [2024-06-21 17:53:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:58,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:53:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:53:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:53:58,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:53:58,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 223 transitions, 2622 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:58,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:58,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:53:58,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:00,565 INFO L124 PetriNetUnfolderBase]: 8268/12068 cut-off events. [2024-06-21 17:54:00,565 INFO L125 PetriNetUnfolderBase]: For 239706/239706 co-relation queries the response was YES. [2024-06-21 17:54:00,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70206 conditions, 12068 events. 8268/12068 cut-off events. For 239706/239706 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 71048 event pairs, 3010 based on Foata normal form. 4/12066 useless extension candidates. Maximal degree in co-relation 70143. Up to 11542 conditions per place. [2024-06-21 17:54:00,668 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 221 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2024-06-21 17:54:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 246 transitions, 3172 flow [2024-06-21 17:54:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:54:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:54:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 17:54:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-21 17:54:00,669 INFO L175 Difference]: Start difference. First operand has 143 places, 223 transitions, 2622 flow. Second operand 5 states and 124 transitions. [2024-06-21 17:54:00,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 246 transitions, 3172 flow [2024-06-21 17:54:00,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 246 transitions, 3067 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 17:54:00,978 INFO L231 Difference]: Finished difference. Result has 146 places, 223 transitions, 2567 flow [2024-06-21 17:54:00,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2567, PETRI_PLACES=146, PETRI_TRANSITIONS=223} [2024-06-21 17:54:00,978 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-21 17:54:00,978 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 223 transitions, 2567 flow [2024-06-21 17:54:00,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:00,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:00,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:54:00,979 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 904678307, now seen corresponding path program 1 times [2024-06-21 17:54:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842877713] [2024-06-21 17:54:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:03,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:03,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842877713] [2024-06-21 17:54:03,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842877713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:03,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:03,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:03,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388394592] [2024-06-21 17:54:03,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:03,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:03,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:03,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:54:03,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 223 transitions, 2567 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:03,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:03,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:54:03,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:06,255 INFO L124 PetriNetUnfolderBase]: 7841/11539 cut-off events. [2024-06-21 17:54:06,256 INFO L125 PetriNetUnfolderBase]: For 248205/248231 co-relation queries the response was YES. [2024-06-21 17:54:06,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67445 conditions, 11539 events. 7841/11539 cut-off events. For 248205/248231 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 69144 event pairs, 2936 based on Foata normal form. 10/11470 useless extension candidates. Maximal degree in co-relation 67380. Up to 10799 conditions per place. [2024-06-21 17:54:06,423 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 207 selfloop transitions, 13 changer transitions 0/245 dead transitions. [2024-06-21 17:54:06,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 245 transitions, 3123 flow [2024-06-21 17:54:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:54:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:54:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 17:54:06,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 17:54:06,426 INFO L175 Difference]: Start difference. First operand has 146 places, 223 transitions, 2567 flow. Second operand 5 states and 122 transitions. [2024-06-21 17:54:06,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 245 transitions, 3123 flow [2024-06-21 17:54:06,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 245 transitions, 3087 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:54:06,881 INFO L231 Difference]: Finished difference. Result has 147 places, 226 transitions, 2629 flow [2024-06-21 17:54:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2629, PETRI_PLACES=147, PETRI_TRANSITIONS=226} [2024-06-21 17:54:06,882 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-21 17:54:06,882 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 226 transitions, 2629 flow [2024-06-21 17:54:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:06,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:06,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:06,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:54:06,883 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:06,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1052156381, now seen corresponding path program 1 times [2024-06-21 17:54:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257544749] [2024-06-21 17:54:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:10,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:10,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257544749] [2024-06-21 17:54:10,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257544749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:10,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135223094] [2024-06-21 17:54:10,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:10,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:10,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:10,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 226 transitions, 2629 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:10,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:10,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:13,650 INFO L124 PetriNetUnfolderBase]: 8346/12174 cut-off events. [2024-06-21 17:54:13,650 INFO L125 PetriNetUnfolderBase]: For 271589/271589 co-relation queries the response was YES. [2024-06-21 17:54:13,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72813 conditions, 12174 events. 8346/12174 cut-off events. For 271589/271589 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 71628 event pairs, 2820 based on Foata normal form. 4/12171 useless extension candidates. Maximal degree in co-relation 72747. Up to 11313 conditions per place. [2024-06-21 17:54:13,753 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 214 selfloop transitions, 65 changer transitions 0/286 dead transitions. [2024-06-21 17:54:13,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 286 transitions, 3783 flow [2024-06-21 17:54:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:54:13,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 17:54:13,755 INFO L175 Difference]: Start difference. First operand has 147 places, 226 transitions, 2629 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:54:13,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 286 transitions, 3783 flow [2024-06-21 17:54:14,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 286 transitions, 3709 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:14,088 INFO L231 Difference]: Finished difference. Result has 151 places, 238 transitions, 2939 flow [2024-06-21 17:54:14,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2939, PETRI_PLACES=151, PETRI_TRANSITIONS=238} [2024-06-21 17:54:14,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 17:54:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 238 transitions, 2939 flow [2024-06-21 17:54:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:54:14,090 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 60109947, now seen corresponding path program 2 times [2024-06-21 17:54:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:14,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639881765] [2024-06-21 17:54:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:14,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639881765] [2024-06-21 17:54:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639881765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564529648] [2024-06-21 17:54:17,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:17,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 238 transitions, 2939 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:19,902 INFO L124 PetriNetUnfolderBase]: 8498/12424 cut-off events. [2024-06-21 17:54:19,902 INFO L125 PetriNetUnfolderBase]: For 296865/296865 co-relation queries the response was YES. [2024-06-21 17:54:19,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76438 conditions, 12424 events. 8498/12424 cut-off events. For 296865/296865 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 73522 event pairs, 2671 based on Foata normal form. 4/12424 useless extension candidates. Maximal degree in co-relation 76371. Up to 11589 conditions per place. [2024-06-21 17:54:20,001 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 235 selfloop transitions, 54 changer transitions 0/296 dead transitions. [2024-06-21 17:54:20,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 296 transitions, 3860 flow [2024-06-21 17:54:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 17:54:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-21 17:54:20,003 INFO L175 Difference]: Start difference. First operand has 151 places, 238 transitions, 2939 flow. Second operand 7 states and 173 transitions. [2024-06-21 17:54:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 296 transitions, 3860 flow [2024-06-21 17:54:20,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 296 transitions, 3742 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 17:54:20,513 INFO L231 Difference]: Finished difference. Result has 156 places, 253 transitions, 3141 flow [2024-06-21 17:54:20,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3141, PETRI_PLACES=156, PETRI_TRANSITIONS=253} [2024-06-21 17:54:20,514 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-06-21 17:54:20,514 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 253 transitions, 3141 flow [2024-06-21 17:54:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:20,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:20,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:54:20,515 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:20,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 544417539, now seen corresponding path program 3 times [2024-06-21 17:54:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:20,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722624850] [2024-06-21 17:54:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722624850] [2024-06-21 17:54:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722624850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:23,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:23,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374215320] [2024-06-21 17:54:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:23,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:23,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:23,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 253 transitions, 3141 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:23,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:23,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:23,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:26,373 INFO L124 PetriNetUnfolderBase]: 8536/12484 cut-off events. [2024-06-21 17:54:26,374 INFO L125 PetriNetUnfolderBase]: For 312647/312679 co-relation queries the response was YES. [2024-06-21 17:54:26,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77184 conditions, 12484 events. 8536/12484 cut-off events. For 312647/312679 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 73884 event pairs, 2799 based on Foata normal form. 28/12502 useless extension candidates. Maximal degree in co-relation 77115. Up to 11503 conditions per place. [2024-06-21 17:54:26,498 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 223 selfloop transitions, 73 changer transitions 0/303 dead transitions. [2024-06-21 17:54:26,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 303 transitions, 4197 flow [2024-06-21 17:54:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 17:54:26,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-21 17:54:26,500 INFO L175 Difference]: Start difference. First operand has 156 places, 253 transitions, 3141 flow. Second operand 7 states and 177 transitions. [2024-06-21 17:54:26,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 303 transitions, 4197 flow [2024-06-21 17:54:26,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 303 transitions, 4078 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:26,997 INFO L231 Difference]: Finished difference. Result has 160 places, 257 transitions, 3258 flow [2024-06-21 17:54:26,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3258, PETRI_PLACES=160, PETRI_TRANSITIONS=257} [2024-06-21 17:54:26,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-21 17:54:26,997 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 257 transitions, 3258 flow [2024-06-21 17:54:26,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:26,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:26,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:54:26,998 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:26,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash 544773729, now seen corresponding path program 4 times [2024-06-21 17:54:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:26,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102091923] [2024-06-21 17:54:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:29,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102091923] [2024-06-21 17:54:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102091923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:29,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:29,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963683535] [2024-06-21 17:54:29,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:29,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:29,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:29,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 257 transitions, 3258 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:29,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:29,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:29,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:33,048 INFO L124 PetriNetUnfolderBase]: 8574/12534 cut-off events. [2024-06-21 17:54:33,048 INFO L125 PetriNetUnfolderBase]: For 329170/329202 co-relation queries the response was YES. [2024-06-21 17:54:33,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78215 conditions, 12534 events. 8574/12534 cut-off events. For 329170/329202 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 74151 event pairs, 2799 based on Foata normal form. 28/12552 useless extension candidates. Maximal degree in co-relation 78145. Up to 11537 conditions per place. [2024-06-21 17:54:33,169 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 213 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-06-21 17:54:33,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 300 transitions, 4178 flow [2024-06-21 17:54:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 17:54:33,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697802197802198 [2024-06-21 17:54:33,171 INFO L175 Difference]: Start difference. First operand has 160 places, 257 transitions, 3258 flow. Second operand 7 states and 171 transitions. [2024-06-21 17:54:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 300 transitions, 4178 flow [2024-06-21 17:54:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 300 transitions, 3920 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:33,729 INFO L231 Difference]: Finished difference. Result has 161 places, 261 transitions, 3257 flow [2024-06-21 17:54:33,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3257, PETRI_PLACES=161, PETRI_TRANSITIONS=261} [2024-06-21 17:54:33,732 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 106 predicate places. [2024-06-21 17:54:33,732 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 261 transitions, 3257 flow [2024-06-21 17:54:33,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:33,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:33,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:33,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:54:33,732 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:33,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash 195698775, now seen corresponding path program 5 times [2024-06-21 17:54:33,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:33,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328537274] [2024-06-21 17:54:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:36,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328537274] [2024-06-21 17:54:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328537274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:36,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:36,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106214369] [2024-06-21 17:54:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:36,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:36,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 261 transitions, 3257 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:36,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:36,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:36,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:39,872 INFO L124 PetriNetUnfolderBase]: 8560/12506 cut-off events. [2024-06-21 17:54:39,872 INFO L125 PetriNetUnfolderBase]: For 339637/339637 co-relation queries the response was YES. [2024-06-21 17:54:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78111 conditions, 12506 events. 8560/12506 cut-off events. For 339637/339637 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 73959 event pairs, 2674 based on Foata normal form. 4/12506 useless extension candidates. Maximal degree in co-relation 78041. Up to 11388 conditions per place. [2024-06-21 17:54:39,968 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 211 selfloop transitions, 108 changer transitions 0/326 dead transitions. [2024-06-21 17:54:39,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 326 transitions, 4259 flow [2024-06-21 17:54:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 17:54:39,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048076923076923 [2024-06-21 17:54:39,974 INFO L175 Difference]: Start difference. First operand has 161 places, 261 transitions, 3257 flow. Second operand 8 states and 210 transitions. [2024-06-21 17:54:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 326 transitions, 4259 flow [2024-06-21 17:54:40,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 326 transitions, 4043 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 17:54:40,486 INFO L231 Difference]: Finished difference. Result has 165 places, 261 transitions, 3319 flow [2024-06-21 17:54:40,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=165, PETRI_TRANSITIONS=261} [2024-06-21 17:54:40,487 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-21 17:54:40,487 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 261 transitions, 3319 flow [2024-06-21 17:54:40,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:40,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:40,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:54:40,487 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:40,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2031993665, now seen corresponding path program 6 times [2024-06-21 17:54:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:40,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059541449] [2024-06-21 17:54:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:43,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:43,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059541449] [2024-06-21 17:54:43,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059541449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:43,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:43,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:43,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333731983] [2024-06-21 17:54:43,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:43,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:43,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:43,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:43,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:43,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 261 transitions, 3319 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:43,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:43,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:43,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:46,034 INFO L124 PetriNetUnfolderBase]: 8546/12486 cut-off events. [2024-06-21 17:54:46,034 INFO L125 PetriNetUnfolderBase]: For 355792/355798 co-relation queries the response was YES. [2024-06-21 17:54:46,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78618 conditions, 12486 events. 8546/12486 cut-off events. For 355792/355798 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 73787 event pairs, 2745 based on Foata normal form. 4/12473 useless extension candidates. Maximal degree in co-relation 78547. Up to 11376 conditions per place. [2024-06-21 17:54:46,137 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 189 selfloop transitions, 105 changer transitions 0/301 dead transitions. [2024-06-21 17:54:46,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 301 transitions, 4077 flow [2024-06-21 17:54:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:54:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:54:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 17:54:46,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 17:54:46,139 INFO L175 Difference]: Start difference. First operand has 165 places, 261 transitions, 3319 flow. Second operand 6 states and 154 transitions. [2024-06-21 17:54:46,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 301 transitions, 4077 flow [2024-06-21 17:54:46,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 301 transitions, 3736 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 17:54:46,587 INFO L231 Difference]: Finished difference. Result has 162 places, 261 transitions, 3206 flow [2024-06-21 17:54:46,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3206, PETRI_PLACES=162, PETRI_TRANSITIONS=261} [2024-06-21 17:54:46,587 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 17:54:46,588 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 261 transitions, 3206 flow [2024-06-21 17:54:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:46,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:46,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:54:46,588 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:46,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1261823517, now seen corresponding path program 1 times [2024-06-21 17:54:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27836834] [2024-06-21 17:54:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27836834] [2024-06-21 17:54:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27836834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:48,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:48,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626500821] [2024-06-21 17:54:48,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:48,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:48,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:48,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 261 transitions, 3206 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:48,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:48,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:48,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:51,712 INFO L124 PetriNetUnfolderBase]: 8778/12833 cut-off events. [2024-06-21 17:54:51,712 INFO L125 PetriNetUnfolderBase]: For 358465/358465 co-relation queries the response was YES. [2024-06-21 17:54:51,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80235 conditions, 12833 events. 8778/12833 cut-off events. For 358465/358465 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 76284 event pairs, 2900 based on Foata normal form. 16/12843 useless extension candidates. Maximal degree in co-relation 80164. Up to 11854 conditions per place. [2024-06-21 17:54:51,806 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 278 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-21 17:54:51,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 313 transitions, 4218 flow [2024-06-21 17:54:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:54:51,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:54:51,829 INFO L175 Difference]: Start difference. First operand has 162 places, 261 transitions, 3206 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:54:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 313 transitions, 4218 flow [2024-06-21 17:54:52,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 313 transitions, 3991 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:52,273 INFO L231 Difference]: Finished difference. Result has 163 places, 265 transitions, 3158 flow [2024-06-21 17:54:52,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3158, PETRI_PLACES=163, PETRI_TRANSITIONS=265} [2024-06-21 17:54:52,275 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-21 17:54:52,275 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 265 transitions, 3158 flow [2024-06-21 17:54:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:52,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:52,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:52,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:54:52,276 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:52,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 544781665, now seen corresponding path program 2 times [2024-06-21 17:54:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:52,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782615367] [2024-06-21 17:54:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:54,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:54,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782615367] [2024-06-21 17:54:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782615367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:54,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:54:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410238307] [2024-06-21 17:54:54,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:54,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:54:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:54:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:54:54,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:54:54,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 265 transitions, 3158 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:54,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:54,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:54:54,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:57,604 INFO L124 PetriNetUnfolderBase]: 8926/13038 cut-off events. [2024-06-21 17:54:57,605 INFO L125 PetriNetUnfolderBase]: For 365686/365686 co-relation queries the response was YES. [2024-06-21 17:54:57,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81712 conditions, 13038 events. 8926/13038 cut-off events. For 365686/365686 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77552 event pairs, 3048 based on Foata normal form. 20/13052 useless extension candidates. Maximal degree in co-relation 81641. Up to 12276 conditions per place. [2024-06-21 17:54:57,698 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 275 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-21 17:54:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 306 transitions, 3954 flow [2024-06-21 17:54:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:54:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:54:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:54:57,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:54:57,709 INFO L175 Difference]: Start difference. First operand has 163 places, 265 transitions, 3158 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:54:57,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 306 transitions, 3954 flow [2024-06-21 17:54:58,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 306 transitions, 3886 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:58,093 INFO L231 Difference]: Finished difference. Result has 167 places, 267 transitions, 3208 flow [2024-06-21 17:54:58,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3208, PETRI_PLACES=167, PETRI_TRANSITIONS=267} [2024-06-21 17:54:58,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 17:54:58,094 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 267 transitions, 3208 flow [2024-06-21 17:54:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:58,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:58,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:58,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:54:58,095 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:54:58,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1653312993, now seen corresponding path program 3 times [2024-06-21 17:54:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:58,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233871702] [2024-06-21 17:54:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233871702] [2024-06-21 17:55:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233871702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:00,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:00,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:55:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581775440] [2024-06-21 17:55:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:55:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:55:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:55:00,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:00,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 267 transitions, 3208 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:00,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:00,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:00,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:03,583 INFO L124 PetriNetUnfolderBase]: 8870/12953 cut-off events. [2024-06-21 17:55:03,584 INFO L125 PetriNetUnfolderBase]: For 370130/370130 co-relation queries the response was YES. [2024-06-21 17:55:03,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81023 conditions, 12953 events. 8870/12953 cut-off events. For 370130/370130 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 76722 event pairs, 2918 based on Foata normal form. 20/12967 useless extension candidates. Maximal degree in co-relation 80950. Up to 12184 conditions per place. [2024-06-21 17:55:03,727 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 274 selfloop transitions, 23 changer transitions 0/304 dead transitions. [2024-06-21 17:55:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 304 transitions, 3938 flow [2024-06-21 17:55:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:55:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:55:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 17:55:03,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 17:55:03,729 INFO L175 Difference]: Start difference. First operand has 167 places, 267 transitions, 3208 flow. Second operand 6 states and 152 transitions. [2024-06-21 17:55:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 304 transitions, 3938 flow [2024-06-21 17:55:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 304 transitions, 3850 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:04,360 INFO L231 Difference]: Finished difference. Result has 168 places, 267 transitions, 3178 flow [2024-06-21 17:55:04,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3178, PETRI_PLACES=168, PETRI_TRANSITIONS=267} [2024-06-21 17:55:04,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-21 17:55:04,361 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 267 transitions, 3178 flow [2024-06-21 17:55:04,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:04,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:04,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:04,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:55:04,361 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:04,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1504798553, now seen corresponding path program 1 times [2024-06-21 17:55:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:04,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472339056] [2024-06-21 17:55:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:05,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:05,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472339056] [2024-06-21 17:55:05,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472339056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:05,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:05,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:55:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762272008] [2024-06-21 17:55:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:05,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:55:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:55:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:55:06,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:55:06,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 267 transitions, 3178 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:06,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:06,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:55:06,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:08,709 INFO L124 PetriNetUnfolderBase]: 7900/11828 cut-off events. [2024-06-21 17:55:08,710 INFO L125 PetriNetUnfolderBase]: For 371014/371041 co-relation queries the response was YES. [2024-06-21 17:55:08,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73774 conditions, 11828 events. 7900/11828 cut-off events. For 371014/371041 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 73841 event pairs, 2860 based on Foata normal form. 13/11599 useless extension candidates. Maximal degree in co-relation 73700. Up to 10589 conditions per place. [2024-06-21 17:55:08,804 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 200 selfloop transitions, 14 changer transitions 0/289 dead transitions. [2024-06-21 17:55:08,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 289 transitions, 3718 flow [2024-06-21 17:55:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:55:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:55:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 17:55:08,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:55:08,805 INFO L175 Difference]: Start difference. First operand has 168 places, 267 transitions, 3178 flow. Second operand 5 states and 120 transitions. [2024-06-21 17:55:08,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 289 transitions, 3718 flow [2024-06-21 17:55:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 289 transitions, 3658 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:09,123 INFO L231 Difference]: Finished difference. Result has 169 places, 275 transitions, 3247 flow [2024-06-21 17:55:09,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3247, PETRI_PLACES=169, PETRI_TRANSITIONS=275} [2024-06-21 17:55:09,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 114 predicate places. [2024-06-21 17:55:09,124 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 275 transitions, 3247 flow [2024-06-21 17:55:09,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:09,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:09,124 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] [2024-06-21 17:55:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:55:09,124 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:09,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1711063047, now seen corresponding path program 1 times [2024-06-21 17:55:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240779518] [2024-06-21 17:55:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240779518] [2024-06-21 17:55:12,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240779518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:12,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:12,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:12,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618372213] [2024-06-21 17:55:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:12,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:12,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:12,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 275 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:12,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:12,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:12,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:15,593 INFO L124 PetriNetUnfolderBase]: 8892/13114 cut-off events. [2024-06-21 17:55:15,593 INFO L125 PetriNetUnfolderBase]: For 386306/386306 co-relation queries the response was YES. [2024-06-21 17:55:15,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83127 conditions, 13114 events. 8892/13114 cut-off events. For 386306/386306 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 79443 event pairs, 2801 based on Foata normal form. 4/13114 useless extension candidates. Maximal degree in co-relation 83051. Up to 12043 conditions per place. [2024-06-21 17:55:15,707 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 258 selfloop transitions, 74 changer transitions 0/339 dead transitions. [2024-06-21 17:55:15,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 339 transitions, 4219 flow [2024-06-21 17:55:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 17:55:15,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 17:55:15,709 INFO L175 Difference]: Start difference. First operand has 169 places, 275 transitions, 3247 flow. Second operand 8 states and 205 transitions. [2024-06-21 17:55:15,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 339 transitions, 4219 flow [2024-06-21 17:55:16,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 339 transitions, 4191 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 17:55:16,090 INFO L231 Difference]: Finished difference. Result has 176 places, 279 transitions, 3467 flow [2024-06-21 17:55:16,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3467, PETRI_PLACES=176, PETRI_TRANSITIONS=279} [2024-06-21 17:55:16,091 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-21 17:55:16,091 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 279 transitions, 3467 flow [2024-06-21 17:55:16,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:16,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:16,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:55:16,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:55:16,091 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:16,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1715531697, now seen corresponding path program 2 times [2024-06-21 17:55:16,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:16,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573296788] [2024-06-21 17:55:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573296788] [2024-06-21 17:55:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573296788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:19,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:19,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539597295] [2024-06-21 17:55:19,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:19,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:19,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:19,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 279 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:19,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:19,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:19,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:23,391 INFO L124 PetriNetUnfolderBase]: 8982/13138 cut-off events. [2024-06-21 17:55:23,391 INFO L125 PetriNetUnfolderBase]: For 418008/418008 co-relation queries the response was YES. [2024-06-21 17:55:23,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87032 conditions, 13138 events. 8982/13138 cut-off events. For 418008/418008 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 78593 event pairs, 2678 based on Foata normal form. 4/13134 useless extension candidates. Maximal degree in co-relation 86953. Up to 11556 conditions per place. [2024-06-21 17:55:23,510 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 200 selfloop transitions, 146 changer transitions 0/353 dead transitions. [2024-06-21 17:55:23,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 353 transitions, 4919 flow [2024-06-21 17:55:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 17:55:23,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024038461538461 [2024-06-21 17:55:23,512 INFO L175 Difference]: Start difference. First operand has 176 places, 279 transitions, 3467 flow. Second operand 8 states and 209 transitions. [2024-06-21 17:55:23,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 353 transitions, 4919 flow [2024-06-21 17:55:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 353 transitions, 4726 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:24,101 INFO L231 Difference]: Finished difference. Result has 179 places, 291 transitions, 3850 flow [2024-06-21 17:55:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3850, PETRI_PLACES=179, PETRI_TRANSITIONS=291} [2024-06-21 17:55:24,102 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-21 17:55:24,102 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 291 transitions, 3850 flow [2024-06-21 17:55:24,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:24,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:24,103 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] [2024-06-21 17:55:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:55:24,103 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:24,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1715800467, now seen corresponding path program 3 times [2024-06-21 17:55:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45257088] [2024-06-21 17:55:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:27,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:27,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45257088] [2024-06-21 17:55:27,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45257088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:27,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:27,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:27,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338140636] [2024-06-21 17:55:27,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:27,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:27,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 291 transitions, 3850 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:27,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:27,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:27,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:31,090 INFO L124 PetriNetUnfolderBase]: 9020/13200 cut-off events. [2024-06-21 17:55:31,091 INFO L125 PetriNetUnfolderBase]: For 451358/451358 co-relation queries the response was YES. [2024-06-21 17:55:31,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90275 conditions, 13200 events. 9020/13200 cut-off events. For 451358/451358 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 79115 event pairs, 2678 based on Foata normal form. 4/13196 useless extension candidates. Maximal degree in co-relation 90195. Up to 11590 conditions per place. [2024-06-21 17:55:31,204 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 192 selfloop transitions, 152 changer transitions 0/351 dead transitions. [2024-06-21 17:55:31,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 351 transitions, 5108 flow [2024-06-21 17:55:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 17:55:31,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 17:55:31,221 INFO L175 Difference]: Start difference. First operand has 179 places, 291 transitions, 3850 flow. Second operand 8 states and 205 transitions. [2024-06-21 17:55:31,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 351 transitions, 5108 flow [2024-06-21 17:55:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 351 transitions, 4896 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-21 17:55:31,947 INFO L231 Difference]: Finished difference. Result has 184 places, 295 transitions, 4047 flow [2024-06-21 17:55:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3660, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4047, PETRI_PLACES=184, PETRI_TRANSITIONS=295} [2024-06-21 17:55:31,948 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 129 predicate places. [2024-06-21 17:55:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 295 transitions, 4047 flow [2024-06-21 17:55:31,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:31,948 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] [2024-06-21 17:55:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:55:31,948 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2042200825, now seen corresponding path program 4 times [2024-06-21 17:55:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933290741] [2024-06-21 17:55:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:35,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933290741] [2024-06-21 17:55:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933290741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:35,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028896131] [2024-06-21 17:55:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:35,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:35,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 295 transitions, 4047 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:35,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:35,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:39,045 INFO L124 PetriNetUnfolderBase]: 9058/13280 cut-off events. [2024-06-21 17:55:39,045 INFO L125 PetriNetUnfolderBase]: For 470854/470854 co-relation queries the response was YES. [2024-06-21 17:55:39,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91727 conditions, 13280 events. 9058/13280 cut-off events. For 470854/470854 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 79670 event pairs, 2725 based on Foata normal form. 4/13280 useless extension candidates. Maximal degree in co-relation 91645. Up to 12333 conditions per place. [2024-06-21 17:55:39,160 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 279 selfloop transitions, 61 changer transitions 0/347 dead transitions. [2024-06-21 17:55:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 347 transitions, 4993 flow [2024-06-21 17:55:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:55:39,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-21 17:55:39,163 INFO L175 Difference]: Start difference. First operand has 184 places, 295 transitions, 4047 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:55:39,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 347 transitions, 4993 flow [2024-06-21 17:55:39,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 347 transitions, 4704 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:39,870 INFO L231 Difference]: Finished difference. Result has 187 places, 299 transitions, 3979 flow [2024-06-21 17:55:39,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=187, PETRI_TRANSITIONS=299} [2024-06-21 17:55:39,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 132 predicate places. [2024-06-21 17:55:39,872 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 299 transitions, 3979 flow [2024-06-21 17:55:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:39,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:39,872 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] [2024-06-21 17:55:39,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:55:39,872 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:39,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1863625734, now seen corresponding path program 1 times [2024-06-21 17:55:39,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:39,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433721359] [2024-06-21 17:55:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:43,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433721359] [2024-06-21 17:55:43,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433721359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:43,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:43,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334111937] [2024-06-21 17:55:43,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:43,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:43,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:55:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 299 transitions, 3979 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:55:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:47,414 INFO L124 PetriNetUnfolderBase]: 8815/13089 cut-off events. [2024-06-21 17:55:47,414 INFO L125 PetriNetUnfolderBase]: For 500440/500460 co-relation queries the response was YES. [2024-06-21 17:55:47,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90390 conditions, 13089 events. 8815/13089 cut-off events. For 500440/500460 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 80504 event pairs, 2725 based on Foata normal form. 26/13023 useless extension candidates. Maximal degree in co-relation 90307. Up to 11721 conditions per place. [2024-06-21 17:55:47,531 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 267 selfloop transitions, 59 changer transitions 0/357 dead transitions. [2024-06-21 17:55:47,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 357 transitions, 4984 flow [2024-06-21 17:55:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 17:55:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 17:55:47,533 INFO L175 Difference]: Start difference. First operand has 187 places, 299 transitions, 3979 flow. Second operand 8 states and 197 transitions. [2024-06-21 17:55:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 357 transitions, 4984 flow [2024-06-21 17:55:48,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 357 transitions, 4832 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:48,405 INFO L231 Difference]: Finished difference. Result has 191 places, 309 transitions, 4135 flow [2024-06-21 17:55:48,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4135, PETRI_PLACES=191, PETRI_TRANSITIONS=309} [2024-06-21 17:55:48,415 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-21 17:55:48,415 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 309 transitions, 4135 flow [2024-06-21 17:55:48,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:48,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:48,415 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] [2024-06-21 17:55:48,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:55:48,415 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:48,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash 760210739, now seen corresponding path program 5 times [2024-06-21 17:55:48,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:48,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606090462] [2024-06-21 17:55:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:55:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:55:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:55:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606090462] [2024-06-21 17:55:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606090462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:55:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:55:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:55:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110894540] [2024-06-21 17:55:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:55:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:55:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:55:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:55:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:55:51,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:55:51,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 309 transitions, 4135 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:51,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:55:51,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:55:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:55:55,495 INFO L124 PetriNetUnfolderBase]: 9328/13696 cut-off events. [2024-06-21 17:55:55,496 INFO L125 PetriNetUnfolderBase]: For 523228/523237 co-relation queries the response was YES. [2024-06-21 17:55:55,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95748 conditions, 13696 events. 9328/13696 cut-off events. For 523228/523237 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82576 event pairs, 2779 based on Foata normal form. 4/13684 useless extension candidates. Maximal degree in co-relation 95663. Up to 11986 conditions per place. [2024-06-21 17:55:55,615 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 207 selfloop transitions, 158 changer transitions 0/372 dead transitions. [2024-06-21 17:55:55,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 372 transitions, 5491 flow [2024-06-21 17:55:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:55:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:55:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 17:55:55,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 17:55:55,616 INFO L175 Difference]: Start difference. First operand has 191 places, 309 transitions, 4135 flow. Second operand 8 states and 205 transitions. [2024-06-21 17:55:55,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 372 transitions, 5491 flow [2024-06-21 17:55:56,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 372 transitions, 5356 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:55:56,393 INFO L231 Difference]: Finished difference. Result has 194 places, 313 transitions, 4414 flow [2024-06-21 17:55:56,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4414, PETRI_PLACES=194, PETRI_TRANSITIONS=313} [2024-06-21 17:55:56,393 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-21 17:55:56,394 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 313 transitions, 4414 flow [2024-06-21 17:55:56,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:55:56,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:55:56,394 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] [2024-06-21 17:55:56,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:55:56,394 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:55:56,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:55:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -616622995, now seen corresponding path program 6 times [2024-06-21 17:55:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:55:56,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942519162] [2024-06-21 17:55:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:55:56,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:55:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942519162] [2024-06-21 17:56:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942519162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:00,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:00,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:00,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919867724] [2024-06-21 17:56:00,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:00,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:00,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:00,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:00,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:56:00,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 313 transitions, 4414 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:00,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:00,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:56:00,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:03,866 INFO L124 PetriNetUnfolderBase]: 9366/13758 cut-off events. [2024-06-21 17:56:03,867 INFO L125 PetriNetUnfolderBase]: For 544372/544381 co-relation queries the response was YES. [2024-06-21 17:56:03,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97165 conditions, 13758 events. 9366/13758 cut-off events. For 544372/544381 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 83064 event pairs, 2779 based on Foata normal form. 4/13746 useless extension candidates. Maximal degree in co-relation 97079. Up to 12020 conditions per place. [2024-06-21 17:56:03,986 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 160 changer transitions 0/373 dead transitions. [2024-06-21 17:56:03,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 373 transitions, 5780 flow [2024-06-21 17:56:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 17:56:03,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 17:56:03,988 INFO L175 Difference]: Start difference. First operand has 194 places, 313 transitions, 4414 flow. Second operand 8 states and 202 transitions. [2024-06-21 17:56:03,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 373 transitions, 5780 flow [2024-06-21 17:56:04,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 373 transitions, 5310 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:04,899 INFO L231 Difference]: Finished difference. Result has 196 places, 317 transitions, 4369 flow [2024-06-21 17:56:04,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4369, PETRI_PLACES=196, PETRI_TRANSITIONS=317} [2024-06-21 17:56:04,900 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-06-21 17:56:04,900 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 317 transitions, 4369 flow [2024-06-21 17:56:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:04,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:04,901 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] [2024-06-21 17:56:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:56:04,901 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:04,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:04,901 INFO L85 PathProgramCache]: Analyzing trace with hash -117879081, now seen corresponding path program 7 times [2024-06-21 17:56:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:04,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870959306] [2024-06-21 17:56:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:04,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870959306] [2024-06-21 17:56:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870959306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:08,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:08,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:08,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837936825] [2024-06-21 17:56:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:08,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:56:08,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 317 transitions, 4369 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:08,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:08,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:56:08,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:12,345 INFO L124 PetriNetUnfolderBase]: 9404/13826 cut-off events. [2024-06-21 17:56:12,346 INFO L125 PetriNetUnfolderBase]: For 561517/561526 co-relation queries the response was YES. [2024-06-21 17:56:12,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97728 conditions, 13826 events. 9404/13826 cut-off events. For 561517/561526 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 83649 event pairs, 2799 based on Foata normal form. 4/13814 useless extension candidates. Maximal degree in co-relation 97641. Up to 12054 conditions per place. [2024-06-21 17:56:12,467 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 175 changer transitions 0/368 dead transitions. [2024-06-21 17:56:12,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 368 transitions, 5515 flow [2024-06-21 17:56:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:56:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:56:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 17:56:12,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:56:12,469 INFO L175 Difference]: Start difference. First operand has 196 places, 317 transitions, 4369 flow. Second operand 8 states and 195 transitions. [2024-06-21 17:56:12,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 368 transitions, 5515 flow [2024-06-21 17:56:13,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 368 transitions, 5165 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:56:13,425 INFO L231 Difference]: Finished difference. Result has 199 places, 321 transitions, 4460 flow [2024-06-21 17:56:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4460, PETRI_PLACES=199, PETRI_TRANSITIONS=321} [2024-06-21 17:56:13,425 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 17:56:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 321 transitions, 4460 flow [2024-06-21 17:56:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:13,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:13,426 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] [2024-06-21 17:56:13,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:56:13,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:13,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1771696439, now seen corresponding path program 8 times [2024-06-21 17:56:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:13,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966494305] [2024-06-21 17:56:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:16,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966494305] [2024-06-21 17:56:16,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966494305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:16,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:16,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:16,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410299721] [2024-06-21 17:56:16,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:16,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:16,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:56:16,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 321 transitions, 4460 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:16,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:16,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:56:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:20,944 INFO L124 PetriNetUnfolderBase]: 9390/13836 cut-off events. [2024-06-21 17:56:20,945 INFO L125 PetriNetUnfolderBase]: For 578213/578213 co-relation queries the response was YES. [2024-06-21 17:56:21,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97923 conditions, 13836 events. 9390/13836 cut-off events. For 578213/578213 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 84155 event pairs, 2792 based on Foata normal form. 4/13836 useless extension candidates. Maximal degree in co-relation 97835. Up to 12352 conditions per place. [2024-06-21 17:56:21,068 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 241 selfloop transitions, 149 changer transitions 0/397 dead transitions. [2024-06-21 17:56:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 397 transitions, 5712 flow [2024-06-21 17:56:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 17:56:21,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-21 17:56:21,070 INFO L175 Difference]: Start difference. First operand has 199 places, 321 transitions, 4460 flow. Second operand 9 states and 237 transitions. [2024-06-21 17:56:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 397 transitions, 5712 flow [2024-06-21 17:56:22,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 397 transitions, 5367 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 17:56:22,034 INFO L231 Difference]: Finished difference. Result has 203 places, 321 transitions, 4447 flow [2024-06-21 17:56:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4447, PETRI_PLACES=203, PETRI_TRANSITIONS=321} [2024-06-21 17:56:22,034 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 148 predicate places. [2024-06-21 17:56:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 321 transitions, 4447 flow [2024-06-21 17:56:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:22,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:56:22,035 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:22,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1605197425, now seen corresponding path program 9 times [2024-06-21 17:56:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972894939] [2024-06-21 17:56:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:25,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972894939] [2024-06-21 17:56:25,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972894939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:25,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:25,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065869007] [2024-06-21 17:56:25,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:25,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:56:25,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 321 transitions, 4447 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:25,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:25,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:56:25,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:29,266 INFO L124 PetriNetUnfolderBase]: 9376/13814 cut-off events. [2024-06-21 17:56:29,266 INFO L125 PetriNetUnfolderBase]: For 597949/597958 co-relation queries the response was YES. [2024-06-21 17:56:29,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97900 conditions, 13814 events. 9376/13814 cut-off events. For 597949/597958 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 83823 event pairs, 2851 based on Foata normal form. 4/13802 useless extension candidates. Maximal degree in co-relation 97811. Up to 12340 conditions per place. [2024-06-21 17:56:29,378 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 221 selfloop transitions, 142 changer transitions 0/370 dead transitions. [2024-06-21 17:56:29,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 370 transitions, 5385 flow [2024-06-21 17:56:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:56:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:56:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 17:56:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 17:56:29,380 INFO L175 Difference]: Start difference. First operand has 203 places, 321 transitions, 4447 flow. Second operand 7 states and 180 transitions. [2024-06-21 17:56:29,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 370 transitions, 5385 flow [2024-06-21 17:56:30,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 370 transitions, 4810 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-21 17:56:30,179 INFO L231 Difference]: Finished difference. Result has 199 places, 321 transitions, 4175 flow [2024-06-21 17:56:30,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4175, PETRI_PLACES=199, PETRI_TRANSITIONS=321} [2024-06-21 17:56:30,180 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 17:56:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 321 transitions, 4175 flow [2024-06-21 17:56:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:30,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:56:30,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:56:30,180 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:30,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1428281572, now seen corresponding path program 2 times [2024-06-21 17:56:30,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875556987] [2024-06-21 17:56:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:34,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875556987] [2024-06-21 17:56:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875556987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:34,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:34,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:34,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163913430] [2024-06-21 17:56:34,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:34,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:34,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:34,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:34,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:56:34,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 321 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:34,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:34,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:56:34,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:37,690 INFO L124 PetriNetUnfolderBase]: 9102/13542 cut-off events. [2024-06-21 17:56:37,691 INFO L125 PetriNetUnfolderBase]: For 583098/583106 co-relation queries the response was YES. [2024-06-21 17:56:37,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95720 conditions, 13542 events. 9102/13542 cut-off events. For 583098/583106 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 83819 event pairs, 2747 based on Foata normal form. 14/13448 useless extension candidates. Maximal degree in co-relation 95631. Up to 11919 conditions per place. [2024-06-21 17:56:37,822 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 279 selfloop transitions, 65 changer transitions 0/375 dead transitions. [2024-06-21 17:56:37,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 375 transitions, 5231 flow [2024-06-21 17:56:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:56:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:56:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:56:37,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:56:37,824 INFO L175 Difference]: Start difference. First operand has 199 places, 321 transitions, 4175 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:56:37,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 375 transitions, 5231 flow [2024-06-21 17:56:38,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 375 transitions, 4886 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:56:38,673 INFO L231 Difference]: Finished difference. Result has 199 places, 333 transitions, 4214 flow [2024-06-21 17:56:38,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=199, PETRI_TRANSITIONS=333} [2024-06-21 17:56:38,674 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 17:56:38,674 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 333 transitions, 4214 flow [2024-06-21 17:56:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:38,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:38,674 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] [2024-06-21 17:56:38,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:56:38,675 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:38,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1799179522, now seen corresponding path program 3 times [2024-06-21 17:56:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180905094] [2024-06-21 17:56:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180905094] [2024-06-21 17:56:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180905094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520941376] [2024-06-21 17:56:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:42,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:42,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:42,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:56:42,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 333 transitions, 4214 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:42,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:42,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:56:42,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:45,906 INFO L124 PetriNetUnfolderBase]: 9280/13805 cut-off events. [2024-06-21 17:56:45,907 INFO L125 PetriNetUnfolderBase]: For 595747/595802 co-relation queries the response was YES. [2024-06-21 17:56:46,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98598 conditions, 13805 events. 9280/13805 cut-off events. For 595747/595802 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 85681 event pairs, 2793 based on Foata normal form. 35/13721 useless extension candidates. Maximal degree in co-relation 98508. Up to 12355 conditions per place. [2024-06-21 17:56:46,080 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 277 selfloop transitions, 74 changer transitions 0/382 dead transitions. [2024-06-21 17:56:46,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 382 transitions, 5260 flow [2024-06-21 17:56:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:56:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:56:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-21 17:56:46,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-06-21 17:56:46,082 INFO L175 Difference]: Start difference. First operand has 199 places, 333 transitions, 4214 flow. Second operand 9 states and 202 transitions. [2024-06-21 17:56:46,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 382 transitions, 5260 flow [2024-06-21 17:56:47,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 382 transitions, 5135 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 17:56:47,230 INFO L231 Difference]: Finished difference. Result has 205 places, 342 transitions, 4430 flow [2024-06-21 17:56:47,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4430, PETRI_PLACES=205, PETRI_TRANSITIONS=342} [2024-06-21 17:56:47,231 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-21 17:56:47,231 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 342 transitions, 4430 flow [2024-06-21 17:56:47,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:47,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:47,231 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] [2024-06-21 17:56:47,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:56:47,231 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:47,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1086243530, now seen corresponding path program 4 times [2024-06-21 17:56:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:47,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554893283] [2024-06-21 17:56:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554893283] [2024-06-21 17:56:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554893283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:51,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923052079] [2024-06-21 17:56:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:56:51,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:56:51,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 342 transitions, 4430 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:51,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:56:51,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:56:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:56:55,152 INFO L124 PetriNetUnfolderBase]: 9229/13730 cut-off events. [2024-06-21 17:56:55,152 INFO L125 PetriNetUnfolderBase]: For 579063/579106 co-relation queries the response was YES. [2024-06-21 17:56:55,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96577 conditions, 13730 events. 9229/13730 cut-off events. For 579063/579106 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 84881 event pairs, 2230 based on Foata normal form. 28/13621 useless extension candidates. Maximal degree in co-relation 96486. Up to 11515 conditions per place. [2024-06-21 17:56:55,282 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 274 selfloop transitions, 77 changer transitions 0/382 dead transitions. [2024-06-21 17:56:55,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 382 transitions, 5376 flow [2024-06-21 17:56:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:56:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:56:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 17:56:55,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2024-06-21 17:56:55,284 INFO L175 Difference]: Start difference. First operand has 205 places, 342 transitions, 4430 flow. Second operand 6 states and 154 transitions. [2024-06-21 17:56:55,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 382 transitions, 5376 flow [2024-06-21 17:56:56,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 382 transitions, 5189 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:56:56,275 INFO L231 Difference]: Finished difference. Result has 205 places, 344 transitions, 4478 flow [2024-06-21 17:56:56,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4478, PETRI_PLACES=205, PETRI_TRANSITIONS=344} [2024-06-21 17:56:56,275 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-21 17:56:56,275 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 344 transitions, 4478 flow [2024-06-21 17:56:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:56:56,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:56:56,276 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] [2024-06-21 17:56:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:56:56,276 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:56:56,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:56:56,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1812517954, now seen corresponding path program 1 times [2024-06-21 17:56:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:56:56,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367330788] [2024-06-21 17:56:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:56:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:56:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:56:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:56:59,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:56:59,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367330788] [2024-06-21 17:56:59,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367330788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:56:59,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:56:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:56:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450300133] [2024-06-21 17:56:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:56:59,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:56:59,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:56:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:56:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:00,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:57:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 344 transitions, 4478 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:00,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:00,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:57:00,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:03,926 INFO L124 PetriNetUnfolderBase]: 9770/14405 cut-off events. [2024-06-21 17:57:03,926 INFO L125 PetriNetUnfolderBase]: For 594557/594557 co-relation queries the response was YES. [2024-06-21 17:57:03,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100390 conditions, 14405 events. 9770/14405 cut-off events. For 594557/594557 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 88022 event pairs, 2846 based on Foata normal form. 12/14411 useless extension candidates. Maximal degree in co-relation 100301. Up to 13326 conditions per place. [2024-06-21 17:57:04,077 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 352 selfloop transitions, 31 changer transitions 0/390 dead transitions. [2024-06-21 17:57:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 390 transitions, 5504 flow [2024-06-21 17:57:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 17:57:04,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 17:57:04,079 INFO L175 Difference]: Start difference. First operand has 205 places, 344 transitions, 4478 flow. Second operand 7 states and 174 transitions. [2024-06-21 17:57:04,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 390 transitions, 5504 flow [2024-06-21 17:57:05,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 390 transitions, 5309 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:05,095 INFO L231 Difference]: Finished difference. Result has 208 places, 346 transitions, 4426 flow [2024-06-21 17:57:05,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4283, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4426, PETRI_PLACES=208, PETRI_TRANSITIONS=346} [2024-06-21 17:57:05,096 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2024-06-21 17:57:05,096 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 346 transitions, 4426 flow [2024-06-21 17:57:05,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:05,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:05,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:05,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:57:05,096 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:57:05,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1647357658, now seen corresponding path program 1 times [2024-06-21 17:57:05,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:05,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192448065] [2024-06-21 17:57:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:08,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192448065] [2024-06-21 17:57:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192448065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:08,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:08,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093872303] [2024-06-21 17:57:08,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:08,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:57:08,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 346 transitions, 4426 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:08,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:08,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:57:08,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:12,502 INFO L124 PetriNetUnfolderBase]: 10090/14826 cut-off events. [2024-06-21 17:57:12,502 INFO L125 PetriNetUnfolderBase]: For 648120/648120 co-relation queries the response was YES. [2024-06-21 17:57:12,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104318 conditions, 14826 events. 10090/14826 cut-off events. For 648120/648120 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 90710 event pairs, 2796 based on Foata normal form. 16/14835 useless extension candidates. Maximal degree in co-relation 104228. Up to 13214 conditions per place. [2024-06-21 17:57:12,638 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 314 selfloop transitions, 94 changer transitions 0/415 dead transitions. [2024-06-21 17:57:12,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 415 transitions, 5835 flow [2024-06-21 17:57:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 17:57:12,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:57:12,640 INFO L175 Difference]: Start difference. First operand has 208 places, 346 transitions, 4426 flow. Second operand 8 states and 208 transitions. [2024-06-21 17:57:12,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 415 transitions, 5835 flow [2024-06-21 17:57:13,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 415 transitions, 5730 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:13,659 INFO L231 Difference]: Finished difference. Result has 211 places, 350 transitions, 4661 flow [2024-06-21 17:57:13,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4661, PETRI_PLACES=211, PETRI_TRANSITIONS=350} [2024-06-21 17:57:13,660 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 156 predicate places. [2024-06-21 17:57:13,661 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 350 transitions, 4661 flow [2024-06-21 17:57:13,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:13,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:13,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:13,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:57:13,661 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:57:13,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1650214618, now seen corresponding path program 2 times [2024-06-21 17:57:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:13,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60238571] [2024-06-21 17:57:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:17,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60238571] [2024-06-21 17:57:17,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60238571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:17,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:17,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:17,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633143180] [2024-06-21 17:57:17,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:17,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:57:17,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 350 transitions, 4661 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:17,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:57:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:22,018 INFO L124 PetriNetUnfolderBase]: 10238/15040 cut-off events. [2024-06-21 17:57:22,018 INFO L125 PetriNetUnfolderBase]: For 681344/681344 co-relation queries the response was YES. [2024-06-21 17:57:22,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107209 conditions, 15040 events. 10238/15040 cut-off events. For 681344/681344 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 92088 event pairs, 2860 based on Foata normal form. 20/15052 useless extension candidates. Maximal degree in co-relation 107118. Up to 13720 conditions per place. [2024-06-21 17:57:22,154 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 310 selfloop transitions, 91 changer transitions 0/408 dead transitions. [2024-06-21 17:57:22,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 408 transitions, 5784 flow [2024-06-21 17:57:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 17:57:22,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:57:22,156 INFO L175 Difference]: Start difference. First operand has 211 places, 350 transitions, 4661 flow. Second operand 8 states and 200 transitions. [2024-06-21 17:57:22,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 408 transitions, 5784 flow [2024-06-21 17:57:23,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 408 transitions, 5625 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:23,312 INFO L231 Difference]: Finished difference. Result has 215 places, 352 transitions, 4770 flow [2024-06-21 17:57:23,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4770, PETRI_PLACES=215, PETRI_TRANSITIONS=352} [2024-06-21 17:57:23,312 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-21 17:57:23,313 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 352 transitions, 4770 flow [2024-06-21 17:57:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:23,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:23,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:23,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:57:23,313 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:57:23,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1931144922, now seen corresponding path program 3 times [2024-06-21 17:57:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:23,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806584474] [2024-06-21 17:57:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:23,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806584474] [2024-06-21 17:57:27,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806584474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:27,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:27,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:27,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356549579] [2024-06-21 17:57:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:27,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:27,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:57:27,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 352 transitions, 4770 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:27,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:27,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:57:27,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:31,337 INFO L124 PetriNetUnfolderBase]: 10834/15946 cut-off events. [2024-06-21 17:57:31,338 INFO L125 PetriNetUnfolderBase]: For 717059/717059 co-relation queries the response was YES. [2024-06-21 17:57:31,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112977 conditions, 15946 events. 10834/15946 cut-off events. For 717059/717059 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 98947 event pairs, 3051 based on Foata normal form. 20/15962 useless extension candidates. Maximal degree in co-relation 112884. Up to 14101 conditions per place. [2024-06-21 17:57:31,525 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 323 selfloop transitions, 77 changer transitions 0/407 dead transitions. [2024-06-21 17:57:31,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 407 transitions, 5902 flow [2024-06-21 17:57:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 17:57:31,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 17:57:31,527 INFO L175 Difference]: Start difference. First operand has 215 places, 352 transitions, 4770 flow. Second operand 8 states and 198 transitions. [2024-06-21 17:57:31,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 407 transitions, 5902 flow [2024-06-21 17:57:32,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 407 transitions, 5686 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:32,792 INFO L231 Difference]: Finished difference. Result has 217 places, 355 transitions, 4823 flow [2024-06-21 17:57:32,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4823, PETRI_PLACES=217, PETRI_TRANSITIONS=355} [2024-06-21 17:57:32,793 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-21 17:57:32,793 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 355 transitions, 4823 flow [2024-06-21 17:57:32,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:32,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:32,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:57:32,794 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:57:32,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1308690632, now seen corresponding path program 1 times [2024-06-21 17:57:32,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:32,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729391429] [2024-06-21 17:57:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:36,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:36,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729391429] [2024-06-21 17:57:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729391429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:36,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:36,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:36,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633287861] [2024-06-21 17:57:36,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:36,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:36,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:36,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 17:57:36,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 355 transitions, 4823 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:36,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:36,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 17:57:36,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:39,964 INFO L124 PetriNetUnfolderBase]: 9697/14622 cut-off events. [2024-06-21 17:57:39,964 INFO L125 PetriNetUnfolderBase]: For 740783/740926 co-relation queries the response was YES. [2024-06-21 17:57:40,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105521 conditions, 14622 events. 9697/14622 cut-off events. For 740783/740926 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 95175 event pairs, 2819 based on Foata normal form. 17/14324 useless extension candidates. Maximal degree in co-relation 105427. Up to 12757 conditions per place. [2024-06-21 17:57:40,129 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 245 selfloop transitions, 68 changer transitions 0/392 dead transitions. [2024-06-21 17:57:40,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 392 transitions, 5634 flow [2024-06-21 17:57:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 17:57:40,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 17:57:40,131 INFO L175 Difference]: Start difference. First operand has 217 places, 355 transitions, 4823 flow. Second operand 6 states and 153 transitions. [2024-06-21 17:57:40,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 392 transitions, 5634 flow [2024-06-21 17:57:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 392 transitions, 5446 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:41,503 INFO L231 Difference]: Finished difference. Result has 217 places, 362 transitions, 4880 flow [2024-06-21 17:57:41,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4880, PETRI_PLACES=217, PETRI_TRANSITIONS=362} [2024-06-21 17:57:41,503 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 162 predicate places. [2024-06-21 17:57:41,503 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 362 transitions, 4880 flow [2024-06-21 17:57:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:41,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:41,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:41,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:57:41,504 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:57:41,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 57663194, now seen corresponding path program 4 times [2024-06-21 17:57:41,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:41,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417720843] [2024-06-21 17:57:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417720843] [2024-06-21 17:57:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417720843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:44,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4660839] [2024-06-21 17:57:44,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:44,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:57:44,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 362 transitions, 4880 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:44,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:44,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:57:44,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand